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model no. vs10780 19? color tft lcd display service manual viewsonic VA902/b viewsonic ? 381 brea canyon road, walnut, california 91789 usa - (800) 888-8583 (VA902/b_sm rev. 1a oct. 2005)
copyright copyrigh t 2005 by viewsonic corporation. all rights reserved. no part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of viewsonic corporation. disclaimer viewsonic makes no representations or warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular purpose. further, viewsonic reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of viewsonic to notify any person of such revision or changes. trademarks viewsonic is a registered trademark of viewsonic corporation. all other trademarks used within this document are the property of their respective owners. optiquest is a registered trademark of viewsonic corporation. revision history ecr number description of changes editor revision sm editing date initial release i viewsonic c orpor ation co nfidenti a l - do not c opy VA902/b g. han 1a 10/20/2005
t able of contents 2. service tools & equipment required 3. circuit theory 4. disassembly & assembly 6. troubleshooting 9. pcb layout diagrams 7. recommended parts list 1. precautions and safety notices 5. test and adjustment 8. schematic diagrams 1 3 4 15 19 24 32 42 46 ii view so nic c o rp o r a t i o n c o nfidenti a l - do no t c o py va 902/b
1. appropriate operation (1) turn off the product before cleaning. (2) use only a dry soft cloth when cleaning the lcd panel surface. (3) use a soft cloth soaked with mild de tergent to clean the display housing. (4) use only a high quality, safety approved ac/dc power cord. (5) disconnect the power plug from the ac outlet if the product will not be used for a long period of time. (6) if smoke, abnormal noise, or strange odor is present, immediately switch the lcd display off. (7) do not touch the lcd panel surf ace with sharp or hard objects. (8) do not place heavy objects on the lcd di splay, video cable, or power cord. (9) do not use abrasive cleaners, waxes or solvents for your cleaning. (10) do not operate the product under the following conditions: - extremely hot, cold or humid environment. - areas containing excessive dust and dirt. - near any appliance generating a strong magnetic field. - in direct sunlight. 2. caution no modification of any circuit should be attempted. service work should only be performed after you are thoroughly familiar with all of the following safety checks and servicing guidelines. 3. safety check care should be taken while servicing this lc d display. because of the high voltage used in the inverter circuit, the voltage i s exposed in such areas as the associated transformer circuits. 4. lcd module handling precautions 4.1 ha nd li ng p reca ut io ns (1) since front polarizer is easily damaged, pay attention not to scratch it. (2) be sure to turn off power supply when connecting or disconnecting input connector. (3) wipe off water drops immediately. long contact with w ater may cause discoloration or spots. (4) when the panel surface is soiled, wipe it w ith absorbent cotton or other soft cloth. (5) since the panel is made of glass, it may break or crack if dropped or bu mped on hard surface. (6) since cmos lsi is used in thi s module, take care of static electricity and ensure human earth when handling. (7) do not open or modify the module assembly. (8) do not press the reflector sheet at the back of the module in any direction. (9) in the event that a module must be put back into the packing container slot after it was taken out of the container, do not press the center of the ccfl reflector edge. instead, press at the far ends of the cfl reflector edge softly. otherwise the tft module may be damaged. (10) at the insertion or removal of the signal int erface connector, be sure not to rotate or tilt the interface connector of the tft module. 1. precautions and safety notices 1 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
(1 1) a f ter in stallatio n of t h e tft mo du le in t o an en closur e ( l c d m o n ito r housin g, for ex amp l e) , do not twist or bend the tft module even momentarily. when designing the enclosure, it should be taken into consideration that no bending/twisting forces may be applied to the tft module from outside. otherwise the tft module may be damaged. (12) the cold cathode fluorescent lamp in the lcd contains a small amount of mercury. please follow local ordinances or regulations for disposal. (1 3) the lcd module contains a small amount of materials having no flammability grade. the lcd module should be supplied with power that complies with the requirements of limited power source (iec60950 or ul1950), or an exemption should be applied for. (1 4) th e lc d m o du le is d e sign ed so th at th e ccfl in it is supplied by a limited current circuit (iec60950 or ul1950). do not connect the ccfl to a hazardous voltag e circuit. 2 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
2 . service tools & equi pment r equired 1. signal generator 2. multimeter 3. screw driver 4. oscilloscope 5. soldering iron 6. solder 7. vga cable (black, 15pins point to point) 8. color analyzer 9. isp board 10. edid board 11. foxisp. exe file 12. edid program file 13. power adapter output 5v/2a 3 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
3. circuit theor y 1. block diagram xtal1 22.118mhz top246y opp/ocp ldo 5v-3.3v 5v-1.8v transformer1 oz9910 rectifier & filter circuit panel interface lamp2 keyboard lamp3 keypad connector vga input vga connector scaler tsu16ak ac line filter ac socket tft lcd panel 19" feedback ovp ltv817 power transformer mcu w78e65p power transformer2 lamp1 lamp4 ac input 90v-264v xtal2 14.318mhz 24c16 open protection rectifier & filter circuit 24c02 block diagram on/off brightness on/off brightness 12v 5v ap2301 pmbt3906 panel enable aop605l 1 2 3 4 1 2 3 4 5v aop605l 4 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
2. electronic circuit theory 2.1 switching mode power supply 2.1.1 ac current input circuit p801 is a connector for connecting ac power. f801 is a fuse to protect all the circuit. ac input voltage is from 100v to 240v. r820 and r821 joined between two inputting main circuit to prevent man from shock. l801 is used to clear up low frequency wave. c801 and c806 are used to discharge the waves that l801 produced. high frequency waves are damped by c801 and c806. d801 is a rectifier which composed of 4 build-in diodes, it inverts ac to dc. 2.1.2 high voltage to low voltage control circuit c805 is used to smooth the wave from rectifier. ic802 is a highly integrated pwm controller, which build-in a power mosfet. when rectified dc high voltage is applied to the drain pin during start-up, the mosfet is off initially, and the control pin capacitor is charged through a switched high voltage current source connected internally between the drain and control pins. when the control pin voltage vc reaches approximately 5.8v, the control circuitry is activated and the soft-start begins. the soft-start circuit gradually increases the duty cycle of the mosfet from zero to the maximum value over approximately 10ms. if no external feedback/supply current is fed into the control pin by the end of the soft-start, the high voltage current source is turned off and the control pin will start discharging in response to the supply current drawn by the control circuitry. resistor r803, r807, r824 and r825 are for line over voltage shut-down (ovp) and line under-voltage detection (uvp).resistors r801, r805, r822, and r823 are for external current limit adjustment, and used to reduce the current limit externally to a value close to the operating peak current of primary about 1.35a. the mean is power will protected when the primary current over about 1.35a. when pwm is turned off, the main current flow will be consumed through d804 and zd802, this will prevent mosfet which built-in ic802 from being damaged under large current impulse and voltage spike. d806 and c815 provide internal auxiliary current to control pin during normal operation. in addition, error amplifier and feedback current to the control pin are for duty cycle control. 2.1.3 dc_5v and dc_14v output circuit for dc 5v, d805 is used to rectify the inducted current. r806 and c811 are used to store energy when current is reversed. the parts including c812, c814, c822, c821, b801 and l803 are used to smooth the current waves. for dc 14v, d803 is used to rectify the inducted current. r802 and c802 are used to store energy when current is reversed. the parts including c808, c810 and l802 are used to smooth the current waves. 2.1.4 feedback and ovp protect circuit pin r of ic803 is supplied 2.5v stable voltage. it is connected to 5v and 14v output through r811, r810 and r818. r811, r810 and r818 are output sampling resistor. when the sampling voltage more than 2.5v or less than 2.5v, feedback current of ic802 will change, this can change the voltage from transformer t801. for 5v dc output ovp, zd803 is a zener diode, when 5v output voltage becomes up to 5.6v, the zener current cause r819 voltage become up to 0.7v, q801 is triggered and ovp starts. for 14v dc output ovp, zd804 is a zener diode, when 14v output voltage becomes up to 16v, the zener current cause r819 voltage become up to 0.7v, q801 is triggered and ovp starts. the collector current of q801 is used to make build-in diode light. fb current of ic802 will be changed; it can change the voltage from t801. q802, r827, r828 and zd801 make up of dummy loading circuit. for start-up sequence, during 5v output take place high loading first, this dummy load ing circuit operated to insure 14v not be increased. 2. 2 inverter circuit 2.2.1 low voltage to high voltage circuit 14v dc supplies the power to ic501 through f501; the control signals that brightness and on/off come from i/f board. on/off signal connect to pin8 of ic501 and makes ic501 enabled. brightness is connected to pin7 of ic501 to adjust the panel luminance. r524, r529, c505 make up of a delay-time circuit and r528, r523, r524 make up of a voltage divided circuit. c504 is used to filter the high frequency noise. the operation frequency is determined by r522 and c529. for burst mode, its 5 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
dimming frequency is determined by r527 and c506. c502 is used for soft start and compensation, c502, c528 are used to filter noise. the output drives, including ndr4, ndrv2, pdrv3, pdrv1 (pins1, 3, 15, 16 respectively), generate a square pulses to drive mosfet u501, u502. and u501, u502 works as full-bridge topology, it is high efficient, zero voltage switch. during start up, vsen (pin9) detects the voltage at the transformer secondary. when vsen reaches 3.0v, the output voltage is regulated. if no current is detected for around 1.5 seconds, ic501 will shut down. the current flowing through ccfl is detected and regulated through sense resistor r509, r511. the feedback voltage through r506, r507, and c508 connected to pin11 (isen), and then compared with a reference voltage (1.5v) via a current amplifier, resulting in pwm drive outputs to full-bridge switches. 2.2.2 protection circuit over voltage protection: r501and r502 are connected in high voltage output connector, the divided ac voltage is inverted dc voltage through d508, r505 and c507are used to rectify wave & dump noise. then the voltage signal reaches pin9 vsen of ic501, when the voltage changes, build-in pwm of ic501 will adjust output voltage. open lamp protection: in normal operation, the resistors r510, r511, r512, r509 are sensed a high level ac voltage, the ac signal is1 invert dc voltage through d509, r515, c533, and the high level dc voltage reaches the gate pin of q502, similarly, the gate pin of q503, q504, q505 has high level dc voltage. so the gate pin of q501 has a low level voltage, and the ic501 is normal operation. once one of signal is1, is2, is3, and is4 is low, the voltages of q501 gate pin is high level, and make the voltage of isen low level, the ic501 will shut down. 2.3 i/f board circuit 2.3.1 power input +5v is from the power board and supply for u101(fs8860-18pj) p p 6 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
button ?key-2? is defined as two functions of selecting and adjustment, which is connected to u105 #25 through cn106 #1. button ?key-up? is defined as plus, which is connected to u105 #26 thro ugh cn 106 #3. button ?key-down? is defined as minus, which is connected to u105 #27 through cn 106 #5. button ?key-1? is defined as two functions of menu and exit, which is connected to u105 #28 thro ugh cn106 #2. led indicator on the front bezel is defined as follows: a. when press button ?key-power?, u105 #6 is pulled down and u105 #7 is pulled high, so q104 is conducted and the led indicator is green. b. when in power-saving mode, u105 #6 is pulled high and u105 #7 is pulled down, so q105 is conducted and the led indicator is orange. 3. factory preset timing table item resolution h-freq. (khz) v- fr eq . (hz) dot clock (mhz) 1 640 x 350 31.5khz 70hz 25.2 2 640 x 400 31.5khz 60hz 25.2 3 640 x 400 31.5khz 70hz 25.2 4 24.7khz 50hz 19.8 5 31.5khz 60hz 25.2 6 35.0khz 67hz 30.2 7 37.9khz 72hz, 31.5 8 37.5khz 75hz, 31.5 9 640 x 480 43.27khz 85hz 36.0 10 720 x 400 31.5khz 70hz 28.3 11 35.1khz 56hz 36.0 12 37.9khz 60hz 40.0 13 48.1khz 72hz 50.0 14 46.9khz 75hz 49.5 15 800 x 600 53.7khz 85hz 56.3 16 832 x 624 49.7khz 75hz 57.3 17 48.4khz 60hz 65.0 18 56.5khz 70hz 75.0 19 58.1khz 72hz 78.5 20 60.0khz 75hz 78.8 21 1024 x 768 68.67khz 85hz 94.5 22 1152 x 870 68.6khz 75hz 100 23 63.4khz 60hz 108 24 1280 x 1024 79.97khz 75hz 135 25 1280 x 720 45khz 60hz 74.2 4. power on/off sequence 4.1 hardware power on when power cord is plugged into ac socket, smps starts work and provides u105 and u106 with vcc5v. when vcpu inputs to u105, u105 resets circuit active, sets u105 all registers to preset modes, and then u105 #43 sends out a hwreset signal voltage to reset u104, and then monitor goes into stand-by mode. that means hardware power on has been completed. 4.2 software power on/off when press power key, u105 #24 recieves low pulse, and sends out ?power on/off? order back to u104, and then u104 will do the power on/off. - if power on, u105 #6 (led_green) will send out high potential, and then led green on. - if power off, u105 #7 (led_orange) will send out high potential, and then led orange on. the panel_vcc, backlight_en, clk/data output to panel will follow the following sequency. 7 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
t1 (ms) t2 (ms) t3 (ms) t4 (ms) t5 (ms) t6 (ms) t7 (ms) 0.1~10 0~10 >200 >100 0~50 0.1~10 >1000 5. ac outlet pin assignment pin symbol description 1 l live 2 n neutral 3 e gnd 6. inner connector pin assignment 6.1 cn501, cn502, cn503, cn504 (connect to panel backlight, sm02b-bhss-1-tb or equivalent) pin symbol description 1 h.v. high voltage for lamp 2 l.v. low voltage for lamp 6.2 cn101 (power bd to interface bd) pin no. symbol description 1,2 +5v (vcc5v) +5.2v output 3,6 gnd ground 4 brightness brightness control 5 on/off ccfl on/off control 6.3 cn106 (interface bd to keypad) pin no. symbol description 1 key_select/auto select contro l and auto adjustment control 2 key_menu/exit osd page selection and exit 3 key_up osd ? ? control to adjust value to increase 4 key_power dc power on/off control 5 key_down osd ? ? control to adjust value to decrease 6 led_green green led lighting control 7 gnd ground 8 led_orange orange led lighting control p801 1 2 3 8 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
6.4 cn103 (connect i/f bd to panel, fi-x30s-h or equivalent) pin no. symbol function 1 rxo0- minus signal of odd channel 0(lvds) 2 rxo0+ plus signal of odd channel 0(lvds) 3 rxo1- minus signal of odd channel 1(lvds) 4 rxo1+ plus signal of odd channel 1(lvds) 5 rxo2- minus signal of odd channel 2(lvds) 6 rxo2+ plus signal of odd channel 2(lvds) 7 gnd ground 8 rxoc- minus si g nal of odd clock channel ( lvds ) 9 rxoc+ plus signal of odd clock channel (lvds) 10 rxo3- minus si g nal of odd channel 3 ( lv d s ) 11 rxo3+ plus signal of odd channel 3(lvds) 12 rxe0- minus signal of even channel 0(lvds) 13 rxe0+ plus signal of even channel 0(lvds) 14 gnd ground 15 rxe1- minus signal of even channel 1(lvds) 16 rxe1+ plus signal of even channel 1(lvds) 17 gnd ground 18 rxe2- minus signal of even channel 2(lvds) 19 rxe2+ plus signal of even channel 2(lvds) 20 rxec- minus signal of even clock channel (lvds) 21 rxec+ plus signal of even clock channel (lvds) 22 rxe3- minus signal of even channel 3(lvds) 23 rxe3+ plus signal of even channel 3(lvds) 24 gnd ground 25 gnd ground 26 gnd ground or open 27 gnd ground 28 vcc power supply (5.0 v) 29 vcc power supply (5.0 v) 30 vcc power supply (5.0 v) 6.5 cn102 (d-sub connector) pin symbol pin symbol pin symbol 1 red video input 6 red gnd 11 nc 2 green video input 7 green gnd 12 serial data (sda) 3 blue video input 8 blue gnd 13 h / h+v sync 4 nc 9 +5v(from pc) 14 vsync 5 cable detect 10 gnd 15 data clock line (scl) 9 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
7. key parts pin assignment 7.1 ic802 (top246y, power control ic) pin symbol i/o description 1 c i control 2 l i line sense 3 x i external current limit 4 s o source of mosfet(gnd) 5 f i frequency 6 d i drain of mosfet 7.2 ic501 (oz9910g, ccfl inverter controller ic) pin no. symbol i/o description 1 ndrv4 o bottom mosfet gate drive output in dual forward converter 2 pgnd high-current power ground 3 ndrv2 o bottom mosfet gate drive output in dual forward converter 4 gnda low-current signal ground 5 ct i timing capacitor of high frequency oscillator 6 lct i timing capacitor of set lpwm frequency 7 adj i control command input ?dc 8 ena i enable input 9 vsen i voltage sense feedback 10 cmp_sst i soft start and loop compensation capacitor 11 isen i current sense feedback 12 vref o reference voltage output 13 vin i supply voltage for ic 14 hsb i high side driver buffer output 15 pdrv3 o top mosfet gate drive output in dual forward converter 16 pdrv1 o top mosfet gate drive output in dual forward converter 7.3 u104 (tsu16ak) pin symbol i/o description 1 lvbom o b-link negative lvds differential data output 2 gnd ground 3 bypass for external bypass capacitor 4 n c n ot connected 5 n c n ot connected 6 bustype in low : serial bus; high : direct bus 7 n c n ot connected 8 n c n ot connected 9 n c n ot connected 10 gnd ground 11 vddp o di g ital out p ut powe r 12 nc not connected 13 n c n ot connected 14 n c n ot connected 15 n c n ot connected 16 nc not connected 17 n c n ot connected 18 vddc i di g ital core powe r 19 gnd ground 10 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
pin symbol i/o description 20 gnd ground 21 vddp o di g ital out p ut powe r 22 n c n ot connected 23 n c n ot connected 24 n c n ot connected 25 n c n ot connected 26 n c n ot connected 27 n c n ot connected 28 n c n ot connected 29 n c n ot connected 30 ad0 i/o ddr direct bus ad0 ; 4ma drivin g stren g th 31 ad3 i/o ddr direct bus ad3 ; 4ma drivin g stren g th 32 hwreset i hardware reset ; active hi g h 33 xin i cr y stal oscillator in p u t 34 xout o cr y stal oscillator out p u t 35 avdd_mpll mpll power 36 gnd ground 37 hsync0 i analog hsync input 38 vsync0 i analog vsync input 39 gnd ground 40 nc not connected 41 nc not connected 42 gnd ground 43 nc not connected 44 nc not connected 45 vdd_adc i adc power 46 nc not connected 47 nc not connected 48 gnd ground 49 nc not connected 50 nc not connected 51 vdd_adc i adc power 52 rext external resistor 390 ohm to avdd adc 53 avdd pll i pll powe r 54 gnd ground 55 avdd adc i adc powe r 56 gnd ground 57 binom i reference ground for analog blue input 58 bino i analo g blue in p u t 59 ginom i reference ground for analog green input 60 gino i analog green input 61 sogin0 i sync-on-green input 62 rinom i reference ground for analog red input 63 rino i analog red input 64 gnd ground 65 avdd_adc i adc power 66 refp internal adc top de-coupling pin 67 refm internal adc bottom de-cou p lin g p i n 68 gnd ground 69 ale/cs i ddr direct bus ale; active high 70 wrz/sda i/o ddr direct bus wrz; active low 71 rdz/scl i ddr direct bus rdz; active low 72 int o cpu interrupt; 4ma driving strength 73 pwm0 o pwm0; 4ma driving strength 11 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
pin symbol i/o description 74 pwm1 o pwm1; 4ma driving strength 75 n c n ot connected 76 nc not connected 77 ad1 i/o ddr direct bus ad1; 8ma driving strength 78 ad2 i/o ddr direct bus ad2; 8ma driving strength 79 nc not connected 80 nc not connected 81 nc not connected 82 nc not connected 83 nc not connected 84 vddp o digital output power 85 gnd ground 86 gnd ground 87 vddc i digital core power 88 nc not connected 89 nc not connected 90 nc not connected 91 nc not connected 92 nc not connected 93 nc not connected 94 vddp o digital output power 95 gnd ground 96 gnd ground 97 vddc i digital core power 98 nc not connected 99 nc not connected 100 nc not connected 101 nc not connected 102 lva3p o a-link positive lvds differential data output 103 lva3m o a-link negative lvds differential data output 104 vddp o digital output powe r 105 gnd ground 106 lvackp o a-link positive lvds differential clock output 107 lvackm o a-link negative lvds differential clock output 108 lva2p o a-link positive lvds differential data output 109 lva2m o a-link negative lvds differential data output 110 lva1p o a-link positive lvds differential data output 111 lva1m o a-link negative lvds differential data output 112 lva0p o a-link positive lvds differential data output 113 lva0m o a-link negative lvds differential data output 114 vddp o digital output power 115 gnd ground 116 gnd ground 117 vddc digital core power 118 lvb3p o b-link positive lvds differential data output 12 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
pin symbol i/o description 119 lvb3m o b-link negative lvds differential data output 120 lvbckp o b-link positive lvds differential clock output 121 lvbckm o b-link negative lvds differential clock output 122 lvb2p o b-link positive lvds differential data output 123 lvb2m o b-link negative lvds differential data output 124 lvb1p o b-link positive lvds differential data output 125 lvb1m o b-link negative lvds differential data output 126 vddp o digital output power 127 gnd ground 128 lvbop o b-link positive lvds differential data output 13 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
7.4 u105 (micro-controller: w78e65p-40) pin symbol i/o description 1 p4.2/int3 a bi-directional i/o port with alternate function. 2 p1,0/t2 o enable panel power on 3 p1.1/t2ex o enable ccfl work 4 p1.2 i vga cable detection 5 p1.3/pwm0 o provide alternated function of pwm volume 6 p1.4/pwm1 o provide alternated function of pwm green led 7 p1.5/pwm2 o provide alternated function of pwm orange led 8 p1.6/pwm3 function is the same as that of standard 8052 9 p1.7/pwm4 function is the same as that of standard 8052 10 rst i reset control pin 11 p3.0/rxd scl line of i2c for edid, debug function 12 p4.3/int2 port 4: a bi-directional i/o port with alternate 13 p3.1/txd sda line of i2c for edid, debug function 14 p3.2/int0 i interrupt request control pin 15 p3.3/int1 o shut down volume mute 16 p3.4/t0 o scl line of i2c communication with eeprom 17 p3.5/t1 i/o sda line of i2c communication with eeprom 18 p3.6/wr i dvi cable detection 19 p3.7/rd o eeprom write protection control for dvi edid 20 xtal2 crystal 22.1184mhz in 21 xtal1 crystal 22.1184mhz out 22 gnd sink voltage ground 23 p4.0 a bi-directional i/o port with alternate function. 24 p2.0/a8 dc power on/off control 25 p2.1/a9 osd ? ? ? 14 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
model title date rev: viewsonic corporation 15 viewsonic c orpor ation co nfidenti a l - do not c opy VA902/b 4. disassembly & assembly 1. exploded diagram and spare parts list
viewsonic model number: vs10780-1w rev: 1a serial no. prefix: pss / psw item viewsonic p/n ref. p/n description q'ty 1 c-00003659/c-00003677 714030002500/10 bezel sub-assm,VA902/b 1 1-1 #n/a 506102000400 logo plate,viewsonic,le1709(three birds) 1 1-2 #n/a 506102000300 logo plate, viewsonic,le1709 1 1-3 #n/a 501010202900/10 bezel,fornt,le1909(silver877c)/(midnight gray) 1 1-4 #n/a 501120101500 lens,le1909 1 1-5 #n/a 501030202200 button,function key,le1909 1 2 #n/a 714072841100 panel sub-ass'y VA902/b hst 1 2-1 panel hst 1 2-2 b-00003172 502090301300 chassis,le1709 1 2-3 #n/a 502020101700 bracket,left,le1909 1 2-4 #n/a 502020101710 bracket,right,le1909 1 2-5 if board ass'y 1 2-6 power board ass'y 1 2-7 hw-00003169 509146305300 screw,pw,cross,w/was,m3*5,ni 14 2-8 hw-00003171 509000000700 bolt,#4-40x11.8,ni 2 2-9 lvds cable le1909 1 2-10 keypad cable le1909 1 2-11 hrn ass'y 1p 157mm black,ul 1007#20 1 2-12 #n/a 511100001500 saddle for cable 1 2-13 #n/a 506381000700 ace tape,30000*45mm,3000pcs/foil 1/3000 2-14 m-00003165 505040202000 insulator,mylar,l79.9xw62.7mm,chassis,le1708 1 3 c-00003660 714050002500 back sub-ass'y 1 3-1 #n/a 501020203500 cover,back,le1909(midnight gray) 1 3-2 #n/a 506102000500 logo plate,viewsonic,le1709(ellipse) 1 3-3 #n/a 502080300300 support vesa le1709 1 4 c-00003658 714020002500 base sub-ass'y 1 4-1 #n/a 501240201200 base,le1909(midnight gray) 1 4-2 #n/a 502170100500 plate,base,le1909 1 4-3 hw-00003667 509112605300 screw,p,cross,p.t-4*5,ni 2 4-4 pl-00003053 503020002600 rubber,foot,od14xt2.5mm,3m,le1909 5 5 c-00003657 501020203400 cover,hinge,le1909 2 6 hw-00003664 502060000110 hinge,right,le1909 1 7 hw-00003663 502060000100 hinge,left,le1909 1 8 #n/a 505040202100 insulator,mylar,l35xw16mm,hinge left,le1909 1 9 hw-00003665 509112612501 screw,p,cross,t.t-4*12,blk(head 7.8mm) 4 10 hw-00003167 509212610300 screw,f,cross,t.t-4*10,ni 4 11 hw-00003666 509142716500 screw,p,cross w/was,t.t-5*16,black 4 12 keypad assm 1 exploded parts list (VA902/b-1) 16 d o n o t c opy VA902/b v i e w s o n i c c o r p o r a t i o n c o n f i d e n t i a l
2. disassembly block note: the arrow is the direction of disassembly. hinge cover*2 bezel sub-assm *1 (screw,p,cross,t4*12, blk*4) hinge,right*1 hinge,left*1 ( screw , f , cross , t4*10 , n i*4 ) back cover sub-ass?y*1 bracket_r*1 ground wire*1 keypad cabel*1 keypad assm*1 (screw,pw,cross,m3*5, ni*4) (ace tape*1) if board*1 power board*1 ffc cable*1 clip,wire*1 (screw,pw,cross,m3*5, ni*4) (bolt, #4-40x11.8, ni*2) insulator,mylar*1 chassis*1 bezel sub-assm(g/s ) button function key*1 led lens*1 front beze l ( g/s ) *1 back cover sub-ass?y support vesa *1 back cover *1 base cover sub-ass?y plate base *1 hsd or qdi panel*1 bracket_l*1 ( screw , pw , cross , m3*5 , n i*4 ) base sub-assm *1 (screw,p,cross,m5*16, ni*4) base cover *1 17 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
3. assembly block . note: the arrow is the direction of assembly. chassis*1 insulator,mylar*1 if board*1 power board*1 ffc cable*1 clip,wire*1 (screw,pw,cross,m3*5, ni*5) (bolt, #4-40x11.8, ni*2) hsd or qdi panel*1 bracket_l*1 (screw,pw,cross,m3*5, ni*4) bracket_r*1 ground wire*1 keypad cabel*1 keypad assm*1 (screw,pw,cross,m3*5, ni*4) (ace tape*1) back cover sub-ass?y*1 base sub-assm *1 opening stand label*1 ( screw , p , cross , m5*16 , n i*4 ) front beze l ( g/s ) *1 led lens*1 button function key*1 logo plate , three brid*1 logo plate ?viewsonic?*1 bezel sub-assm(g/s ) back cover *1 back cover sub-ass?y logo plate(ellipse)*1 support vesa *1 base cover sub-ass?y ba s e cov er *1 plate base *1 rubber foot le1708 *4 hinge,right*1 hinge,left*1 (screw,f,cross,t4*10, ni*4) bezel sub-assm *1 id label*1 ( screw , p , cross , t4*12 , blk*4 ) s/n label*1 qc label*1 hi pot label*1 v19 lcd monitor final asm hinge cover*2 18 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
5. test and adjustment 1. key function description control key keys function [auto] [2] by pressing [auto] key, ?auto image adjust? is performed [menu] [1] by pressing [menu] key, main menu display [ ] [ ] a. when ?menu osd? display, press these keys to change the contents of an adjustment item, or change an adjustment value b. when ?menu osd? is un-display, press these keys to change brightness and contrast [power] power on or power off the monitor 2. hot key operation control key keys function [ ] + [ ] recall contrast or brightness while in the contrast or brightness adjustment, or recall both of contrast and brightness when the osd is not open. [1] + [2] toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode. [1] + [ ] + [ ] white balance (not shown on user?s guide) [1] + [ ] power lock [1] + [ ] osd lock remark : all the short cuts function are only available while osd off 19 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
3. osd control 3.1 osd table layer 1 layer 2 layer 3 auto image adjust contrast (+ / -) contrast/brightness brightness (+ / -) srgb 9300k 6500k 5400k red (+ / -) green (+ / -) color adjust user color blue (+ / -) information h position (+ / -) h/v position v position (+ / -) h size + / - fine tune + / - manual image adjust sharpness + / - english french german italian spanish finnish japanese simplified chinese language select traditional chinese resolution notice on/off h position (+ / -) osd position v position (+ / -) osd time out setup menu osd background on/off memory recall 3.2 osd lock menu function osd lock menu function check item method phenomenon activate osd lock [1] + [ x ] 10s press any of buttons"1", " z ", " x ", "2" will appear "osd locked" 3s deactivate osd lock: [1] + [ x ] 10s(again) notice: when the osd is locked will lock all functions. status bar indicating osd lock or unlock is in progress and when complete it will indicate ?osd locked? osd lock should not lock power button and power lock function 20 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
3.3 power lock menu function power lock menu function check item method phenomenon activate power lock [1] + [ ] 10s can not turn off the lcd; press the power button will appear "power button locked" osd 3s; lcd would automatically turn back "on" when power is restored after a power failure deactivate power lock [1] + [ ] 10s(again) notice: status bar indicating power button lock or unlock is in progress and when complete it will indicate ?power button locked? power should only be lockable in the ?on state? 3.4 resolution notice function resolution notice menu item method phenomenon activate resolution notice menu resolution notice osd should show on screen after changing to non-native mode for 30 sec, and it should disappear after 10s or by pushing button [1] or [2] ------ deactivate resolution notice menu push button [2] under resolution notice osd, select disable ------- 3.5 factory mode introduction when input the signal, press ?power key? to turn off the monitor. press? [ ] +[ ] +[ ] ?at the same time so as to enter factory mode. after power on, press ??menu[1]?? key, you can see the factory menu. inl : currently using panel model name v2 050526 : currently using firmware version information. auto color : automatically calibrate chip adc parameter by using chip internal dac color temperature : the r, g, b of 9300k and 6500k and 5400k and user mode colors are all generated from scaling back end. 4. burn-in pattern if it is a new monitor, and in factory mode, if no vga signal input, burn-in pattern will self generate automatically. burn in patterns are: full red, green, blue, white and black. you can not escape from burn-in pattern until plug in vga cable, and then press the power key. turn the monitor off and then turn it on. 5. auto color (automatically calibrate chip adc parameter by using chip internal dac) if it is a new-built set and it is first time to do the ?auto color?, please confirm the following steps: -connect the vga cable with the standard video pattern generator and display 16-gray pattern on the monitor. - press ?power? to power off the monitor. - press? [ ] +[ ] +[ ] ?simultaneously to enter factory mode. - press ??menu[1]??, then press ??auto[2]?? to execute auto color item. - after the ?auto color? process finished, please press ?power? to restart monitor. 21 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
6. edid (rewrite edid data to eeprom) if we need to rewrite the eeprom data, please confirm the following steps. 1. plug in vga cable; we can rewrite the edid data to eeprom by using ?edid rewrite? program. 2. if the ?edid rewrite? process finished, please pull out vga cable and press ??2??+?? ?? at the same time. 3. pull out ac power cable or press power key to restart. 7. upload firmware to mcu via vga cable 7.1 connect isp board between monitor and pc as below configure 7.2 before plug in the power cord, make sure keep ? ? key to be pressed, when power on you can enter isp mode. 7.3 8051ispwriter.exe will de tect automatically which mcu used in this monitor. do it as the order shown on the screen, choose the corresponding firmware version, and load to mcu. 7.4 after finish, please plug out power cable and re-start monitor again. isp board rs232 9pin d-sub 15pin d-sub 15pin pc vga output lcd monitor d-sub insert to rs232 9pin con on pc normal shipping cable service cable +12v adapter 22 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
8 after repair, to ensure the quality you shou ld do the following test and adjustment item content equipment test osd function 1.signal is set as 1280x1024@60hz 2. lcm button are from left to right, checking whether each single function key and compound function key can be worked. chroma signal generator contrast check 1. set input mode to 1280x1024@60hz 2. set pattern to 32 gray shades 3. set contrast to the max. the brightest 5~6 shades brightness cannot be distinguished. chroma signal generator color temperature 1. do ?auto color? at 1280 x 1024@60hz, 32gray shades 2. measure color temperature, check it complies with the following temperature: 5400k x=0.335 +/- 0.02, y=0.350 +/- 0.02 6500k x=0.313 +/- 0.02, y=0.329 +/- 0.02 9300k x=0.283 +/- 0.02, y=0.298 +/- 0.02 chroma signal generator and color analyzer modes switching check 1. use chroma pattern generator to make sequence. vesa (640x480 800x600 1024x768 1280x1024), mac 832x624 dos (640x350 720x400), the detail supported modes and power saving signal. 2. confirm the above timing modes must be full screen and the picture must be normal. 3. led is orange at power saving mode. chroma signal generator y measurement at default setting 1. set brightness to default value 100 and contrast to default value 70 at 6500k 2. at full white patter, measure y, which should be >=200cd/m2 chroma signal generator and color analyzer panel flicker check 1. mode: 1280x1024@60hz 2. set brightness& contrast to default value 3. do ?auto image adjust? 4. shut down pc to check whether there?s glitter on the center of the picture. equipment:: chroma signal generator & pc power saving 1. mode: 1280x1024@60hz 2. pattern: full white 3. brightness: max. 4. contrast: default 5. check power consumption at each modes state power consumption led color normal 40 green stand by 1 orange power key off 1 no chroma signal generator and power meter ac input: 230v/50hz 23 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
6. trouble shooting 1. common acknowledge z if you change the interface board, be sure that the u105, u106 and u103 these three components also changed to the new i/f board because there was program inside. if not, please re-w rite edid or upload firmware into mcu via vga cable. z if you adjust clock and phase, please do it at the condition of windows shut down pattern. z if you confirm the r.g.b. color is normal or not, please do it under 16-grey scalar pattern. z this lcm is analog interface. so if the entire screen is an ab normal color that means the problem happen in the analog circuit part, if only some scale appears abnormal color that stand the problem happen in the digital circuit part. z if you check the h/v position, please use the crosshatch pattern. z this lcm support more than 30 timing modes, if the input timing mode is out of specification, the picture may appears abnormally. z if brightness uneven, repairs inverter circuit or change a new panel. z if you find the vertical line or horizontal line lost on the screen, please change panel. 24 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
2. no power & power led off no power check primary rectifier voltage check ic802, c805, t801 check circuit if short check f801, p801, d801 check pin3 of ic802 voltage about 1v check r801, r805, r822, r823, r817 check pin2 of ic802 voltage about 2v check r803, r807, r824, r825 check pin1 of ic802 voltage is 5.8v check r812, r816, c818 end 25 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
3. dc output voltage is unstable output voltage unstable check vbe of q801 below 0.3v check circuit if short check zd801, zd802, zd803, d803, d805 check q801, q802 check reference voltage check pinr of ic801 check r809, r814, ic801, r818 check r810, r811 check feedback circuit check vpin3-4 of ic801 about 6v check vpin1-2 of ic801 a bout 1v check c815, d806, r812 check r809, r814 end 26 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
4. output power is unstable unstable power check sampling circuit check r810, r811, r818 change r810, r811, r818 check the r pin voltage of ic803 about 2.5v check r809, r808, r814, d809 check d806, c815 if short change d806, c815 check pin1 of ic802 voltage is 5.8v check pin3 of ic802 voltage about 1v change r801, r805, r822, r823, r817 end check the c pin voltage of ic803 if 3v change ic803 27 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
5. backlight can?t be turned on is there high-level voltage on pin8 of ic501? is there pulse waveform on pin1, pin3, pin15 and pin16 of ic501 at the moment of restart? check cn501, cn502, cn503 and cn504? no raster? led green? yes yes yes backlight cannot be turned on. no check power supply no is r526 ok? check i/f board yes r526 open no yes no is ok ic501? yes u501, u502 fail no ic501 fail yes is ok t501, t502? t501, t502 fail no connecting the output connector again no check protected circuit q501, q502, q503, q504 yes ye s end is there 14vdc voltage on pin13 of ic501? yes 28 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
6. black screen and backlight turn on 29 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
7. white screen white screen workmanship lvds cable reinsert change lvds cable check vlcd is 5v check panel-enable of u105(pin2) is low lvds cable ng check the hwreset of u104 exists check rp101 check the pins of u105 end ok ng ok ng ok ok ng ok ng ng check lvds signals ok panel fail ng check q101,q102,q107,r103 30 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
8. bad screen bad screen workmanship lvds cable ng 1.check x101,c154,c155 2.check x102,c126,c168 check ale/rdz/ wrz/ad0/ad1/ad2/ ad3/hwreset check the pins of u104 and u105 lvds cable reinsert change lvds cable check crystal:pin20,21 of u105 and pin 33,34 of u104 check the communication of u104 and u105 ok ng ok ng ng ok ng ok 31 viewsonic c o rp o r a t i o n c o nfident i a l - do n o t copy VA902/b
rev: 1a serial no. prefix: pss item ecr/ecn viewsonic p/n ref. p/n location universal number# q'ty 1 power cord (australia) a-00003671 453070800420r 50 2 power cord (british) a-00003675 453070800230r 50 3 power cord (ccc) a-00003676 453070800170 50 4 power cord (cns) a-00003672 453070800480 50 5 power cord (europe) a-00003674 453070800210r 50 6 power cord (pse) a-00003673 453070800380r 50 7 power cord 10a/125v blk 6ft ul/csa a-00003040 453070800250 50 8 if board b-00003654 790411301400 50 9 power & inverter board b-00003655 790411401400 50 10 control board b-00003656 790411501000 50 11 cover, hinge, VA902 c-00003657 501020203400 50 12 base assembly c-00003658 714020002500 50 13 bezel assembly c-00003659 714030002500 50 14 back cover assembly c-00003660 714050002500 50 15 hrn ass'y 1p 157mm cb-00003661 430300100200 100 16 hrn lvds ffc 30p 185mm cb-00003662 430303000180 100 17 d-sub cable cb-00003047 453010100100 50 18 hinge, left. hw-00003663 502060000100 50 19 hinge, right. hw-00003664 502060000110 50 20 bolt,#4-40x11.8, nifpr d-sub conn. hw-00003171 509000000700 100 21 screw, p, cross, t.t-4*12, blk hw-00003665 509112612501 100 22 screw, f, cross, t.t-4*10 ni hw-00003167 509212610300 100 23 screw, p, cross, w/was, t.t-5*16,black hw-00003666 509142716500 100 24 screw, p, cross, t.t-4*5 ni hw-00003667 509112605300 100 25 screw, pw, cross, w/was,m3*5,ni hw-00003169 509146305300 100 26 carton, VA902, p-00003668 506020007100 50 27 cusion, eps-l p-00003669 506040005800 50 28 cusion, eps-r p-00003670 506040005810 50 recommended spare parts list (VA902-1) description viewsonic model number: vs10780-1w accessories: cabinets: packing material: board assembly: cables: hardware: 7. recommended part list 32 d o n o t c opy VA902/b v i e w s o n i c c o r p o r a t i o n c o n f i d e n t i a l
rev: 1a serial no. prefix: psw item ecr/ecn viewsonic p/n ref.p/n location universal number# q'ty 1 power cord (australia) a-00003671 453070800420r 50 2 power cord (british) a-00003675 453070800230r 50 3 power cord (ccc) a-00003676 453070800170 50 4 power cord (cns) a-00003672 453070800480 50 5 power cord (europe) a-00003674 453070800210r 50 6 power cord (pse) a-00003673 453070800380r 50 7 power cord 10a/125v blk 6ft ul/csa a-00003040 453070800250 50 8 if board b-00003654 790411301400 50 9 power & inverter board b-00003655 790411401400 50 10 control board b-00003656 790411501000 50 11 cover, hinge, VA902 c-00003657 501020203400 50 12 base assembly c-00003658 714020002500 50 13 bezel assembly c-00003677 714030002510 50 14 back cover assembly c-00003660 714050002500 50 15 hrn ass'y 1p 157mm cb-00003661 430300100200 100 16 hrn lvds ffc 30p 185mm cb-00003662 430303000180 100 17 d-sub cable cb-00003047 453010100100 50 18 hinge, left. hw-00003663 502060000100 50 19 hinge, right. hw-00003664 502060000110 50 20 bolt,#4-40x11.8, nifpr d-sub conn. hw-00003171 509000000700 100 21 screw, p, cross, t.t-4*12, blk hw-00003665 509112612501 100 22 screw, f, cross, t.t-4*10 ni hw-00003167 509212610300 100 23 screw, p, cross, w/was, t.t-5*16,black hw-00003666 509142716500 100 24 screw, p, cross, t.t-4*5 ni hw-00003667 509112605300 100 25 screw, pw, cross, w/was,m3*5,ni hw-00003169 509146305300 100 26 carton, VA902, p-00003678 506020007110 50 27 cusion, eps-l p-00003669 506040005800 50 28 cusion, eps-r p-00003670 506040005810 50 accessories: cabinets: packing material: board assembly: cables: hardware: recommended spare parts list (VA902b-1) description viewsonic model number: vs10780-1w 33 d o n o t c opy va 9 02/b v i e w s o n i c c o r p o r a t i o n c o n f i d e n t i a l
rev: 1a serial no. prefix: pss item viewsonic p/n ref. p/n description location 1 #n/a 506250005001 lbl,agency(VA902), le1909.ccc mark for vscn &vsi & vse &vse-uk 1 pc 2 #n/a 506440002300 label,blank,76.2x76.2mm,le1709(upc) for vscn &vsi & vse &vse-uk 1 pc 3 #n/a 506390000500 label,qc-pass,od=15mm, le1709 for vscn &vsi & vse &vse-uk 1 pc 4 #n/a 506390000600 label,hi-pot pass, le1709 for vscn &vsi & vse &vse-uk 1 pc 5 #n/a 506390000400 label,opening stand, le1709 for vscn &vsi & vse &vse-uk 1 pc 6 #n/a 506440002400 label,blank,50x25mm,le1709(s/n) for vscn &vsi & vse &vse-uk 1 pc 7 p-00003670 506040005810 cushion,eps-r, le1909 for vscn &vsi & vse &vse-uk 1 pc 8 p-00003669 506040005800 cushion,eps-l, le1909 for vscn &vsi & vse &vse-uk 1 pc 9 p-00003668 506020007100 carton,viewsonic(VA902),le1909 for vscn &vsi & vse &vse-uk 1 pc 10 p-00003943 506120300400 bag,pe+epe,l590xw480xt0.6mm (printed)le1909 for vscn &vsi & vse &vse-uk 1 pc 11 #n/a 506380001800 tape,wrapping type,48mmx50m le1x04/05 for vscn &vsi & vse &vse-uk 0.024 rol 12 #n/a 506431000300 film,pe 500mmx900m for vscn &vsi & vse &vse-uk 0.0025 rol 13 #n/a 506440002600 label,blank,210x65mm,le1709(pallet) for vscn &vsi & vse &vse-uk 0.0357 pc 14 #n/a 506039000900 corner paper,1900x50x50mm,le1701 for vscn &vsi & vse &vse-uk 0.0714 pc 15 #n/a 506039001200 corner paper,820x50x50mm for vscn &vsi & vse &vse-uk 0.0714 pc 16 #n/a 506150001900 pallet,1100x1100x120mm,le1705 for vscn &vsi & vse &vse-uk 0.0178 pc 17 #n/a 506037001610 cardboard,cover,1100x1100x120xt5mm, le1909 for vscn &vsi & vse &vse-uk 0.0357 pc 18 #n/a 453070800170r pwrcord 10a/250v blk 6ft china.rvv 3gx0. only for vscn 1 pc 19 a-00003674 453070800210r pwr cord 6a/250v blk 6ft vde h05vv-f 3gx only for vse & vse-uk 1 pc 20 a-00003675 453070800230r pwrcord 6a/250v blk 6ft uk3gx.75mm(sp60/ only for vse-uk 1 pc 21 #n/a 453070800480r pwrcord 7a/125v blk 6ft cns,vctf 3gx0.75 only for vsi 1 pc 22 cb-00003047 453010100100 cable,d-sub 15p male 6ft black/blue,sz40 for vscn &vsi & vse &vse-uk 1 pc 23 #n/a 703000000703 kit,accessory,VA902-hsd,le1909 for vscn &vsi & vse &vse-uk 1 pc 24 #n/a 714072840100 assy,fianl(s), le1909-4a0 for vscn &vsi & vse &vse-uk 1 pc 25 c-00003657 501020203400 cover,hinge, le1909 for vscn &vsi & vse &vse-uk 2 pc 26 hw-00003664 502060000110 hinge,right, le1909 for vscn &vsi & vse &vse-uk 1 pc 27 hw-00003663 502060000100 hinge,lift, le1909 for vscn &vsi & vse &vse-uk 1 pc 28 #n/a 505040202100 insulator,mylar,l35xw16mm,hinge left, le1909 for vscn &vsi & vse &vse-uk 1 pc 29 hw-00003665 509112612501 screw,p,cross,t.t-4*12,blk(head ? 7.8mm) for vscn &vsi & vse &vse-uk 4 pc 30 hw-00003167 509212610300 screw,f,cross,t.t-4*10,ni for vscn &vsi & vse &vse-uk 4 pc 31 hw-00003666 509142716500 screw,p,cross w/was,t.t-5*16,black for vscn &vsi & vse &vse-uk 4 pc 32 #n/a 430300800370 hrn ass'y 4x2p 220mm ul2651#28 for vscn &vsi & vse &vse-uk 1 pc 33 c-00003659 714030002500 assy,bezel(silver),le1909 for vscn &vsi & vse &vse-uk 1 pc 34 #n/a 501010202900 bezel,front(silver), le1909 for vscn &vsi & vse &vse-uk 1 pc 35 #n/a 501030202200 button,function key, le1909 for vscn &vsi & vse &vse-uk 1 pc 36 #n/a 501120101500 lens, le1909 for vscn &vsi & vse &vse-uk 1 pc 37 c-00003660 714050002500 assy,back cover, le1909 for vscn &vsi & vse &vse-uk 1 pc 38 #n/a 501020203500 cover,back, le1909 for vscn &vsi & vse &vse-uk 1 pc 39 #n/a 502080300300 support,vesa, le1709 for vscn &vsi & vse &vse-uk 1 pc 40 c-00003658 714020002500 assy,base, le1909 for vscn &vsi & vse &vse-uk 1 pc 41 #n/a 501240201200 base, le1909 for vscn &vsi & vse &vse-uk 1 pc 42 #n/a 502170100500 plate,base, le1909 for vscn &vsi & vse &vse-uk 1 pc 43 hw-00003667 509112605300 screw,p,cross,t.t-4*5,ni for vscn &vsi & vse &vse-uk 2 pc 44 pl-00003053 503020002600 rubber,foot,od14.1xt2.5mm,3m, le1708 for vscn &vsi & vse &vse-uk 5 pc 45 #n/a 714072841100 assy,panel(s), le1909-4a0 for vscn &vsi & vse &vse-uk 1 pc 46 e-00003942 631102090110 lcd panel 19" hsd190me13- a02(hannstar) for vscn &vsi & vse &vse-uk 1 pc 47 b-00003172 502090301300 chassis, le1709 for vscn &vsi & vse &vse-uk 1 pc 48 #n/a 502020101700 bracket,left, le1909 for vscn &vsi & vse &vse-uk 1 pc 49 #n/a 502020101710 bracket,right, le1909 for vscn &vsi & vse &vse-uk 1 pc 50 b-00003654 790411301400 pcba,if board, le1909-4a0 for vscn &vsi & vse &vse-uk 1 pc 51 b-00003655 790411401400 pcba,pwr&inv./b, le1909-4a0 for vscn &vsi & vse &vse-uk 1 pc 52 hw-00003169 509146305300 screw,pw,cross w/was,m3*5,ni for vscn &vsi & vse &vse-uk 13 pc 53 hw-00003171 509000000700 bolt,#4-40x11.8,nifor d-sub/dvi conn. for vscn &vsi & vse &vse-uk 2 pc 54 cb-00003662 430303000180 hrn lvds ffc 30p 185mm,accx30185ku28my for vscn &vsi & vse &vse-uk 1 pc 55 b-00003656 790411501000 pcba,keypad board, le1909 for vscn &vsi & vse &vse-uk 1 pc 56 cb-00003661 430300100200 hrn ass'y 1p 157mm green,ul1007 #20 for vscn &vsi & vse &vse-uk 1 pc 57 #n/a 511100001500 clip,wire.ch-01p(pg), le1709 for vscn &vsi & vse &vse-uk 1 pc 58 #n/a 506381000700 tape,ace,45mmx30m(pc=10x45mm),le1709 for vscn &vsi & vse &vse-uk 0.001 rol 59 m-00003165 505040202000 insulator,mylar,l79.7xw62.7mm,chass is, le1709 for vscn &vsi & vse &vse-uk 1 pc viewsonic model number: vs10780-1w qty. bom list (VA902-1 for "hannstar (8ms) panel") 34 d o n o t c opy va 9 02/b v i e w s o n i c c o r p o r a t i o n c o n f i d e n t i a l
item viewsonic p/n ref. p/n description location qty. 60 #n/a 506102000400 logo plate,viewsonic, le1709(three birds) for vscn &vsi & vse &vse-uk 1 pc 61 #n/a 506102000300 logo plate,viewsonic, le1709 for vscn &vsi & vse &vse-uk 1 pc 62 #n/a 506102000500 logo plate,viewsonic, le1709(ellipse) for vscn &vsi & vse &vse-uk 1 pc 63 #n/a 506390210100 label,carton(8ms),le1709,l89xw58mm for vscn &vsi & vse &vse-uk 1 pc 64 #n/a 506380002100 tape,wrapping type(viewsonic),50mmx75m,le1709 for vscn &vsi & vse &vse-uk 0.0083 rol 65 #n/a 506431002050 film,protection,unprinted,le1909/18 for vscn &vsi & vse &vse-uk 0.1 pc 66 #n/a 506091000500 label,warranty, le1709 only for vscn 1 pc 67 #n/a 506092001400 card,warranty, le1709 only for vscn 1 pc 68 #n/a 506030200200 card,after service, le1709.l130xw80 only for vscn 1 pc 69 #n/a 506120004600 bag,plastic,l700xw505xh160xt0.05mm,le 1909 only for vscn 1 pc 70 #n/a 506500003100 label,"u" mark(20x20mm),le1709 only for vse-uk 1 pc 35 d o n o t c opy va 9 02/b v i e w s o n i c c o r p o r a t i o n c o n f i d e n t i a l
rev: 1a serial no. prefix: psw item viewsonic p/n ref. p/n description location 1 #n/a 506250005001 lbl,agency(VA902), le1909.ccc mark for vsa 1 pc 2 #n/a 506440002300 label,blank,76.2x76.2mm,le1709(upc) for vsa 1 pc 3 #n/a 506390000500 label,qc-pass,od=15mm, le1709 for vsa 1 pc 4 #n/a 506390000600 label,hi-pot pass, le1709 for vsa 1 pc 5 #n/a 506390000400 label,opening stand, le1709 for vsa 1 pc 6 #n/a 506440002400 label,blank,50x25mm,le1709(s/n) for vsa 1 pc 7 p-00003670 506040005810 cushion,eps-r, le1909 for vsa 1 pc 8 p-00003669 506040005800 cushion,eps-l, le1909 for vsa 1 pc 9 p-00003668 506020007100 carton,viewsonic(VA902),le1909 for vsa 1 pc 10 p-00003943 506120300400 bag,pe+epe,l590xw480xt0.6mm (printed)le1909 for vsa 1 pc 11 #n/a 506380001800 tape,wrapping type,48mmx50m le1x04/05 for vsa 0.024 rol 12 #n/a 506431000300 film,pe 500mmx900m for vsa 0.0025 rol 13 #n/a 506440002600 label,blank,210x65mm,le1709(pallet) for vsa 0.0357 pc 14 #n/a 506039000900 corner paper,1900x50x50mm,le1701 for vsa 0.0714 pc 15 #n/a 506039001200 corner paper,820x50x50mm for vsa 0.0714 pc 16 #n/a 506150001900 pallet,1100x1100x120mm,le1705 for vsa 0.0178 pc 17 #n/a 506037001610 cardboard,cover,1100x1100x120xt5mm, le1909 for vsa 0.0357 pc 18 a-00003040 453070800250 pwr cord 10a/125v blk 6ft ul/csa,svt 18x for vsa 1 pc 19 cb-00003047 453010100100 cable,d-sub 15p male 6ft black/blue,sz40 for vsa 1 pc 20 #n/a 703000000713 kit,accessory,VA902b-hsd,le1909 for vsa 1 pc 21 #n/a 714072840101 assy,fianl(g), le1909-4a0 for vsa 1 pc 22 c-00003657 501020203400 cover,hinge, le1909 for vsa 2 pc 23 hw-00003664 502060000110 hinge,right, le1909 for vsa 1 pc 24 hw-00003663 502060000100 hinge,lift, le1909 for vsa 1 pc 25 #n/a 505040202100 insulator,mylar,l35xw16mm,hinge left, le909 for vsa 1 pc 26 hw-00003665 509112612501 screw,p,cross,t.t-4*12,blk(head ? 7.8mm) for vsa 4 pc 27 hw-00003167 509212610300 screw,f,cross,t.t-4*10,ni for vsa 4 pc 28 hw-00003666 509142716500 screw,p,cross w/was,t.t-5*16,black for vsa 4 pc 29 #n/a 430300800370 hrn ass'y 4x2p 220mm ul2651#28 for vsa 1 pc 30 c-00003677 714030002510 assy,bezel(gray),le1909 for vsa 1 pc 31 #n/a 501010202910 bezel,front(gray), le1909 for vsa 1 pc 32 #n/a 501030202200 button,function key, le1909 for vsa 1 pc 33 #n/a 501120101500 lens, le1909 for vsa 1 pc 34 c-00003660 714050002500 assy,back cover, le1909 for vsa 1 pc 35 #n/a 501020203500 cover,back, le1909 for vsa 1 pc 36 #n/a 502080300300 support,vesa, le1709 for vsa 1 pc 37 c-00003658 714020002500 assy,base, le1909 for vsa 1 pc 38 #n/a 501240201200 base, le1909 for vsa 1 pc 39 #n/a 502170100500 plate,base, le1909 for vsa 1 pc 40 hw-00003667 509112605300 screw,p,cross,t.t-4*5,ni for vsa 2 pc 41 pl-00003053 503020002600 rubber,foot,od14.1xt2.5mm,3m, le1708 for vsa 5 pc 42 #n/a 714072841100 assy,panel(s), le1909-4a0 for vsa 1 pc 43 e-00003942 631102090110 lcd panel 19" hsd190me13- a02(hannstar) for vsa 1 pc 44 b-00003172 502090301300 chassis, le1709 for vsa 1 pc 45 #n/a 502020101700 bracket,left, le1909 for vsa 1 pc 46 #n/a 502020101710 bracket,right, le1909 for vsa 1 pc 47 b-00003654 790411301400 pcba,if board, le1909-4a0 for vsa 1 pc 48 b-00003655 790411401400 pcba,pwr&inv./b, le1909-4a0 for vsa 1 pc 49 hw-00003169 509146305300 screw,pw,cross w/was,m3*5,ni for vsa 13 pc 50 hw-00003171 509000000700 bolt,#4-40x11.8,nifor d-sub/dvi conn. for vsa 2 pc 51 cb-00003662 430303000180 hrn lvds ffc 30p 185mm,accx30185ku28my for vsa 1 pc 52 b-00003656 790411501000 pcba,keypad board, le1909 for vsa 1 pc 53 cb-00003661 430300100200 hrn ass'y 1p 157mm green,ul1007 #20 for vsa 1 pc 54 #n/a 511100001500 clip,wire.ch-01p(pg), le1709 for vsa 1 pc 55 #n/a 506381000700 tape,ace,45mmx30m(pc=10x45mm),le1709 for vsa 0.001 rol 56 m-00003165 505040202000 insulator,mylar,l79.7xw62.7mm,chass is, le1709 for vsa 1 pc 57 #n/a 506102000400 logo plate,viewsonic, le1709(three birds for vsa 1 pc 58 #n/a 506102000300 logo plate,viewsonic, le1709 for vsa 1 pc 59 #n/a 506102000500 logo plate,viewsonic, le1709(ellipse) for vsa 1 pc 60 #n/a 506390210100 label,carton(8ms),le1709,l89xw58mm for vsa 1 pc viewsonic model number: vs10780-1w qty. bom list (VA902b-1 for "hannstar (8ms) panel") 36 d o n o t c opy va 9 02/b v i e w s o n i c c o r p o r a t i o n c o n f i d e n t i a l
item viewsonic p/n ref. p/n description location qty. 61 #n/a 506380002100 tape,wrapping type(viewsonic),50mmx75m,le1709 for vsa 0.0083 rol 62 #n/a 506431002050 film,protection,unprinted,le1909/18 for vsa 0.1 pc 37 d o n o t c opy va 9 02/b v i e w s o n i c c o r p o r a t i o n c o n f i d e n t i a l
38 viewsonic c orpor ation co nfidenti a l - do not c opy VA902/b 8. schematic diagram power supply r824 510k zd803 5.6v r823 3m3 r818 3k3 1% r816 6r8 on/off c814 47u 25v brightness c807 33n 400v/ nc r814 1k +14v b801 bead core 3.5x9 q802 2sc1815 1 3 2 c820 2200p y 1 c821 0.1u/50v c822 0.1u 50v r806 10r c805 100u 450v r829 200r r821 1m c812 1000u 10v 275v 250v c801 2200p y 2 r813 1k r808 10k meb zd804 16v r820 1m srf8-10 1 2 d806 a02 r817 12k vcc5v ic802 top246y 1 2 3 4 5 6 c l x s f d c818 47u/25v r811 51k 1% v03 3 2 a4 0921341041 le1909(VA902/b) power supply 2005-06-02 innolux document number : size : title : date : sheet of rev : draw n by : check by : appro by : 12 d804 mur1100 c802 1n 500v vcc5v c824 4700p y 1 -+ d801 bl4-06 1 2 4 3 r822 3m3 r804 68r 1/2w c810 220u 25v c806 2200p y 2 r819 10k r827 10k r825 470k 400v 1 2 d809 1n4148w 250v r801 3m3 c r a ic803 tl431 r812 6r8 cn801 08da-6s 1 2 3 4 5 6 f801 2a 250v c826 1000u 10v r802 10r c819 47u/25v r805 3m3 t801 tr f -ei 28 1 2 3 5 4 11 6 7 9 10 8 rt801 5r l801 12mh 4 1 3 2 d805 1 2 3 c815 47u/25v r807 510k srf5-04 c813 47p 1kv p801 ac in 1 2 3 c804 0.47u x2 c808 1000u 25v c803 4n7/1kv zd801 9.1v l803 5uh 5a r810 5k1 1% r828 100r 1w d803 1 2 3 l to scaler bd cn101 c811 1n 500v c817 0.1u 50v c816 0.1u 100v l802 5uh 5a n q801 pmbt3904 r803 510k r809 100r zd802 p6ke200a ic801 ltv817 3 1 4 2 pgnd r815 1k viewsonic VA902/b
39 view so nic c o rp o r a t i o n c o nfidenti a l - do no t c o py VA902/b inverter +14v c511 2.2uf/25v r513 0r d502 bav99 1 2 3 1.4k q501 2n7002 1 3 2 d512 1n4148w is3 c531 0.1u/50v d508 bav99 1 2 3 d503 bav99 1 2 3 is1 brightness q503 2n7002 1 3 2 r519 1m c534 0.1u/50v j507 33r 1/4w r503 3m/3kv c503 100n/50v r526 47k 1% r527 3.3m 1% ovp1 r517 1m c536 220pf/50v op1 j501 33r 1/4w r534 10k r502 3.6k r524 360k 1% 1.5k op3 cn501 h l c527 5p/3kv + c509 220uf/25v c525 5p/3kv d506 bav99 1 2 3 on/off r512 1k r533 10k t502 eel-19 22:2600 2 3 5 6 8 7 auo op3 c532 0.1u/50v is1 r514 0r d507 bav99 1 2 3 r515 1m cn502 h l 1.5k d505 bav99 1 2 3 q502 2n7002 1 3 2 note: t?? : ??? ; t?? : ??l? ; ?? : ?? ; is3 v03 3 3 a4 0921341041 le1909 (VA902/b) inverter 2005-07-15 innolux document number : size : title : date : sheet of rev : drawn by : check by : appro by : d501 bav99 1 2 3 r528 124k 1% r501 3m/3kv cn504 h l r532 10k r522 88.7k 1% hsd/inl c505 0.01u/25v c529 220p g/ 50v u501 aop605 1 2 3 4 5 6 7 8 s1 g1 s2 g2 d2 d2 d1 d1 1 2 d514 sks20-04at c528 1.0u/25v 5v r521 1m c506 4700p/50v d510 1n4148w c524 10p/3kv 1.5k r523 62k 1% c504 1n/50v r504 3.6k q505 2n7002 1 3 2 5v c533 0.1u/50v r508 100k t501 eel-19 22:2600 2 3 5 6 8 7 ic501 oz9910g 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ndrv2 pgnd ndrv1 gnda ct lct dim ena vsen cmp_sst isen v5000 vin hsb pdrv1 pdrv2 ovp2 r511 d511 1n4148w 1 2 d513 sks20-04at c538 nc r507 3.9k 1% + c522 220uf/25v c535 220pf r531 10k item ovp1 c526 10p/3kv r510 1k c508 22n/25v c537 nc cn503 h l 1.5k 5v c507 2200p/50v r509 1.5k 1% q504 2n7002 1 3 2 op1 op4 +5v r529 1m 1.4k c502 2.2u/25v op2 r505 1m r509 op4 d504 bav99 1 2 3 ovp2 u502 aop605 1 2 3 4 5 6 7 8 s1 g1 s2 g2 d2 d2 d1 d1 c523 6.8n/50v op2 r506 3.9k 1% qdi d509 1n4148w r511 1.5k 1% c530 6.8n/50v viewsonic VA902/b
40 view so nic c o rp o r a t i o n c o nfidenti a l - do no t c o py VA902/b dc input r106 10k vlcd brightness vcc3.3 vaa1 vcc5v + c106 100uf/16v q103 pmbt3904 vcc5v c108 0.1/50v on/off c111 0.1/50v + c101 100uf/16v vcc5v vaa2 r176 4k7 q107 pmbt3904 vcc5v + c105 100uf/16v/nc dimmer1 c104 0.1/50v r170 0 on/off r104 4k7 vcc1.8 vlcd c114 0.1/50v vaa3 r105 4k7 vcc1.8 r157 4k7 r177 10k r103 4k7 panel_enable c110 0.1/50v q102 pmbt3906 vaa4 from power & inverter + c169 100uf/16v c113 1u/16v c107 0.1/50v c102 0.1/50v vcc5v q108 pmbt3904 brightness u101 fs8860-18pj 3 1 2 vin adj vout vaa2 vaa4 v01 6 2 a4 0921341040 le1909 (VA902/b) dc input 2005-06-07 innolux document number : size : title : date : sheet of rev : drawn by : check by : appro by : u102 fs8860-33pj 3 1 2 vin adj vout vaa3 cn101 4500-06 1 2 3 4 5 6 + c103 100uf/16v r174 9.1r/2w ccfl_enable r175 nc/0 vcc3.3 q101 ap2301n g d s vaa1 r101 10k r169 22k + c109 100uf/16v viewsonic VA902/b
41 view so nic c o rp o r a t i o n c o nfidenti a l - do no t c o py VA902/b vga input r112 75 1% c165 nc d103 sn4148 hpd_vga ddc_sda_vga nc/c118 1000p/50v r121 47 r110 100 vga_g ddc_scl_vga r124 10k vcc5v vga_r c124 0.1/50v tvs103 bav99 rin gndb ddc_scl_vga r118/nc 470 vga_b c117 47n/25v c123 47n/25v tvs102 bav99 vsi tvs106 5v6 c116 47n/25v vsync r120 2k2 r119 2k2 c119 33p/50v c115 47n/25v tvs104 5v6 r168 0 r109 1k r115 22 vcc5v c122 47n/25v r107 100 hsync c167 nc r114 10k r111 75 1% gin ddc_sda_vga r122 47 vcc5v r108 1k c121 47n/25v pc5v_vga sog r116 22 ddc_scl_vga tvs105 5v6 d104 sn4148 r125 10k ddc_sda_vga r113 75 1% cn102 dz11aa1-hw6 1 6 2 7 3 8 4 9 5 11 12 13 14 15 10 16 17 gndr r117 22 pc5v_vga r126 100 bin c120 220p/50v det_vga v01 6 3 a4 0921341040 le1909 (VA902/b) vga_input 2005-06-07 innolux document number : size : title : date : sheet of rev : drawn by : check by : appro by : r127 100 r165 0 c166 nc u103 at24c02n-10si 1 2 3 4 5 6 7 8 a0 a1 a2 gnd sda scl wp vcc tvs101 bav99 gndg hsi r167 0 r123 47 r166 0 tvs107 5v6 viewsonic VA902/b
42 view so nic c o rp o r a t i o n c o nfidenti a l - do no t c o py VA902/b scaler ad3 c171 0.1/50v vpll pa8 c132 0.1/50v pb0 c135 0.1/50v pb1 fb102 bead60ohm pb3 pa5 c133 0.1/50v r164 1k c131 0.1/50v vaa3 c162 100p/50v vaa2 pa3 pb[0..9] vcc3.3 vpo pa[0..9] csz/ale bin ad1 vdpll c126 22p/50v vdd vcc1.8 c134 10u/16v c145 0.1/50v pa1 c172 0.1/50v dimmer1 c128 10u/16v hsync vaa4 vdvi c129 0.1/50v gndb sda/wrz r162 1k u104 tsu16ak 63 60 61 58 62 59 57 37 38 40 41 43 44 46 47 49 50 52 66 67 72 73 74 107 55 35 45 3 51 11 21 84 94 104 114 126 18 87 97 117 39 56 36 2 54 42 10 20 85 95 115 127 19 86 96 105 116 33 34 108 109 110 111 112 113 118 119 120 121 122 123 124 125 128 1 29 28 30 31 53 65 64 48 106 103 102 68 77 78 6 69 70 71 32 rin0 gin0 sogin0 bin0 rin0m gin0m bin0m hsync0 vsync0 r+ r- g+ g- b+ b- ck+ ck- rext refp refm int pwm0 pwm1 lvackm avdd avdd_mpll avdd_dvi bypass avdd_dvi vddp vddp vddp vddp vddp vddp vddp vddc vddc vddc vddc avss_dvi avss avss_mpll avss_lpll avss_pll avss_dvi gndp gndp gndp gndp gndp gndp gndc gndc gndc gndp gndc xin xout lva2p lva2m lva1p lva1m lva0p lva0m nc/lvb3p nc/lvb3m nc/lvbckp nc/lvbckm nc/lvb2p nc/lvb2m nc/lvb1p nc/lvb1m nc/lvb0p nc/lvb0m ddc1_clk/gpo8 ddc1_dat/gpo7 ad0/gpo6 ad3/gpo5 avdd_pll avdd avss avss_dvi lvackp lva3m lva3p avss ad1 ad2 bus type/nc csz sda scl hwresetz c164 100p/50v vaa3 c168 22p/50v pb8 c141 0.1/50v pa4 sog vaa2 vaa4 fb107 bead60ohm hwreset fb106 bead60ohm c137 0.1/50v c130 0.1/50v scl/rdz pb2 vad x102 14.318mhz pb[0..9] c136 0.1/50v c127 0.1/50v pa2 pa7 fb103 bead60ohm ad2 vpo vsync gin pb5 pb7 pb9 r129 4k7 c174 0.1/50v vcc3.3 c139 0.1/50v c144 10u/16v vcc1.8 vaa1 vcc3.3 vpll pa0 pa9 c140 10u/16v rin vdvi c143 0.1/50v int vdd c173 0.1/50v v01 6 4 a4 0921341040 le1909 (VA902/b) scaler 2005-06-07 innolux document number : size : title : date : sheet of rev : drawn by : check by : appro by : gndr pb4 c125 1u/16v vdpll r128 390 1% c163 100p/50v pa6 r163 1k pb6 vdvi c138 10u/16v vaa1 fb104 bead60ohm vad fb105 bead60ohm ad0 c142 10u/16v pa[0..9] gndg note: u104 pin4,5,7~9,12~17,22~27,75,76,79~83,88~93,98~101 are all nc (open) c170 0.1/50v viewsonic VA902/b
43 view so nic c o rp o r a t i o n c o nfidenti a l - do no t c o py VA902/b panel interface pb6 rxe1- rxo1- pb1 rxo0- pb[0..9] rxe0- pa7 rxe2+ rxo0- pa5 pa2 rxo3- rxec- rxoc- rxec+ rxe2- pb9 pa8 rxe3- pb4 rxe3+ pb7 rxe1+ pa9 rxe2- rxe0+ rxo1- vlcd rxo2+ rxo2+ pb2 vlcd rxo2- pa0 pb5 rxec- rxe3- rxo3- vlcd rxe3+ rxo3+ pa6 rxec+ rxo1+ rxe0+ pa3 pa4 rxo2- pb0 pa[0..9] rxoc+ rxe0- rxoc+ rxe2+ v01 6 5 a4 0921341040 le1909 (VA902/b) panel interface 2005-06-07 innolux document number : size : title : date : sheet of rev : drawn by : check by : appro by : pb3 cn104 dupon2.0mm/nc 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 rxe1+ rxe1- rxoc- pa1 rxo0+ rxo0+ cn103 al2309-a0g1z 1 2 3 4 6 8 10 12 14 16 18 20 22 24 26 28 30 7 9 11 13 15 17 19 21 23 25 27 29 5 rxo1+ rxo3+ pb8 viewsonic VA902/b
44 view so nic c o rp o r a t i o n c o nfidenti a l - do no t c o py VA902/b muc u105 winbond w78e65p 1 2 3 4 5 6 7 20 21 22 24 25 26 27 28 29 30 32 35 36 37 38 39 40 11 13 14 16 17 41 42 43 44 10 31 15 18 12 19 8 9 23 33 34 p4.2 p1.0 p1.1 p1.2 p1.3 p1.4 p1.5 x2 x1 vss p2.0 p2.1 p2.2 p2.3 p2.4 p2.5 p2.6 psen ea p0.7 p0.6 p0.5 p0.4 p0.3 p3.0/rxd p3.1/txd p3.2/int0 p3.4/t0 p3.5/t1 p0.2 p0.1 p0.0 vdd rst p2.7 p3.3/int1 p3.6/wr p4.3/int2 p3.7 p1.6/pwm3 p1.7/pwm4 p4.0 ale p4.1 led_orange r141 100 c151 0.1/50v ad1 c159 1000p/50v fb108 bead60ohm key_select/auto r148 1k ad3 ad2 c156 1000p/50v ccfl_enable vcpu led_orange r156 10k r131 0 r142 220 r145 220 det_vga led_green c148 10u/16v vcpu vcpu r134 10k ad0 led_green cn106 2x4pin 8 1 3 5 2 7 4 6 c157 1000p/50v r158 51 vcpu r133 10k r159 220 r150 1k u106 24c16 1 2 3 4 5 6 7 8 a0 a1 a2 gnd sda scl wp vcc rp103 10k 8 1 7 2 6 3 5 4 rp101 10k 8 1 7 2 6 3 5 4 c153 nc/10u/16v panel_enable r140 100 d102 sn4148 hwreset r152 100 r146 1k vcpu r143 4k7 ddc_sda_vga isp for standard 8051 c155 12p/50v sda/wrz vcpu r139 10k x101 22.1184mhz q104 pmbt3906 c150 10u/16v vcc5v r137 10k c160 1000p/50v to key pad q105 pmbt3906 csz/ale c149 0.1/50v key_up r138 10k ddc_scl_vga v01 6 6 a4 0921341040 le1909 (VA902/b) mcu 2005-06-07 innolux document number : size : title : date : sheet of rev : drawn by : check by : appro by : r155 10k vcpu r153 100 rp104 10k 8 1 7 2 6 3 5 4 key_menu/exit r149 1k r144 4k7 key_power int c158 1000p/50v scl/rdz rp102 10k 8 1 7 2 6 3 5 4 key_down c154 12p/50v r147 1k r132 10k viewsonic VA902/b
45 view so nic c o rp o r a t i o n c o nfidenti a l - do no t c o py VA902/b key pad power down sw101 sw tact led_orange key_up sw102 sw tact up key_select/auto auto/2 led101 green v01 2 2 a4 0921341039 le1909(VA902/b) keypad 2005-06-02 innolux document number : size : title : date : sheet of rev : drawn by : check by : appro by : key_power sw104 sw tact key_down sw105 sw tact menu/1 sw103 sw tact orange key_menu/exit led_green cn106 2x4pin 1 2 4 5 6 7 8 3 viewsonic VA902/b
46 view so nic c o rp o r a t i o n c o nfidenti a l - do no t c o py VA902/b 9. pcb layout main board top layout
47 view so nic c o rp o r a t i o n c o nfidenti a l - do no t c o py VA902/b power board

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in the usa at facsimile 1-909-839-7943. you may also e-mail any suggestions to the director, quality systems & processes (marc.maupin@viewsonic.com) precautions and safety notices 1. 8. exploded diagram and exploded parts list 7. recommended spare parts list adjustment procedure 2. specification 5. 4. circuit description 3. 6. troubleshooting flow chart front panel function control description 9. block diagram 10. schematic diagrams 11. pcb layout diagrams 48 viewsonic c orpor ation co nfidenti a l - do not c opy VA902/b service manual content service manual layout the form and listing name: title: company: add.: tel: e-mail: fax: a. what do you think about the content of this service manual? b. are you satisfied with this service manual? c. do you have any other opinions or suggestions regarding this service manual?

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