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color television TQ2092
contents safety precautions???????????????????????????..? alignment instructions ???????????.??.?????????..??.? working principle analysis of the unit????????????.????.????. block diagram?????????????..?????????.????.??? ic block diagram???????????????????????????..?? wiring diagram ???????????????????????..?????... troubleshooting???????????????????????????..?? schematic diagram ??????????????????????????.?.. appendix-a: main assembly list appendix-b: exploded view 1 2 7 8 9 14 15 18
1 safety instruction 1. x-ray radiation precaution 1.1 excessive voltage will cause harmful x-ray. to avoid this radiation hazar d, the high voltage should fall within the limitation. the appliance works at ac 110v, 60hz. the high voltage of zero beam current (brightness is min) should be within 29kv on condition that the main power voltage is ac110v. and it should not exceed 33kv in any condition. when servicing, please refer to the high volt age check procedure this service manual before check the high voltage and the high voltage meter should be reliable and accurate. * keep the main power voltage at 1 10v when checking the high voltage. 1.2 the primary source of x-ray radiation is t he crt. the crt of this tv set have gotten the approval of safety authentication inspection. the replac ement crt should be exactly the same type and specification crt which has gott en a similar safety approval, and check the high voltage according to the high voltage check procedure. 2. safety precaution a. since the power supply ci rcuit of this receiver is directly c onnected to the ac power line, an isolation transformer is necessary during dynamic service to avoid possible shock hazard. b. always discharge the graphite la yer conductor when moving the crt. c. disconnect the power cord before replacing parts. d. when replacing high-power re sistor, keep the resistor 10 mm away from the circuit board. 3. component safety precaution many electrical and mechanical part s in the chassis have special safe ty-related characteristics. these characteristics are often passed unno ticed by a visual in spection. replacement parts which have these special safety characteristics ar e identified in this manual and it s supplement electrical components having such features are shaded or marked by on the schematic diagram and the parts list. before replacing any of these com ponents, read the parts list in this m anual carefully. the use of substitute replacement parts which do not have t he same characteristic as specified in the parts list may create shock, fire, x-ray radiation or other hazards. general instruction 1. copy the standard model data to let eeprom (n101 m24c16)of the c hassis have those data before placing it on the unit, do ?f actory adjustment? if necessary. if use a blank eeprom directly, you should preset iic data and then do other common adjustment. 2.the adjustment should be done under following ci rcumstances without additional instruction a) alternating current 110v/60hz b) preheat at least 30 min 3.the unit has auto degaussing circ uit, the auto degaussing process c an be finished within 1s when the main power. only when turn on the unit at least 30min after last time turn off tv does the auto degaussing circuit work. note: this service manual is only for profe ssional service personnel?s reference. before servicing the unit, please read the following items carefully.
2 4. if the crt with magnetism affects color purit y and convergence, when the auto degaussing eraser. if the color purity and conver gence are still not very good, then corresponding adju stment should be done. refer to picture tube adj ustment method for adjustment. alignment instruction 1. debugging item a) vif adjustment b) s-trap adjustment c) h vco adjustment d) osd adjustment e) b+ voltage adjustment f) rf agc voltage adjustment g) focus adjustment h) screen-grid voltage white balance adjustment i) field, line scan center adjustment j) filed, line am plitude adjustment k) raster adjustment 2. alignment flow
3 fig-1 alignment flow the unit and remote control av, s terminal check color purity, convergence check white balance check sub brightness check picture and sound check filament voltage check x-ray protect check high voltage check e 2 prom copy s-trap adjustment osd adjustment focus adjustment screen-grid voltage white balance adjustment check h vco adjustment vif adjustment scan amplitude, center and raster adjustment b+ adjustment rf agc adjustment
4 3. factory menu adjustment (factory menu page) 3.1 vif adjustment receive a signal at will, enter factory menu vcj ad j, select vif vco, press ?vol+/_?, then display ?end? and it means ic has adjust if to 45.75mhz automatically. 3.2 s-trap adjustment receive a signal at will, enter factory menu vcj adj, select s-trap, press ? vol+/_?, then ic will adjust s-trap to the best situation. 3.3 h vco adjustment receive a signal at will, enter factory menu raster adj, select h vco adj, press ? vol+/_?, then ic will auto adjust h vco to the best situation. 3.4 osd adjustment receive ntsc signal, check the osd, if osd is not at the center of the scr een, you can adjust ?110: osd h-pos? of the last page of service menu. 3.5 b+ voltage adjustment a) make sure that the power is ac 110v/60hz b) connect b+ point with a digital voltmeter, re ceive a-7 signal, set the picture to ?standard?, the value of b+ voltage should be 110 v 0.5 v 3.6 agc adjustment a) receive 60 db split field signal(a-7). b) use oscilloscope or digital voltmeter to m onitor check tuner 1# pin?s voltage (agc output). c) enter factory menu vcj adj, select re dela y, increase the value until the voltage just about 3.8v, now the picture should just without noisy, otherwise adjust r-agc slightly. 3.7 focus adjustment a) receive a-12 philips signal, set user control to ?standard?. b) adjust focus electrode potentiometer on fbt to optimize b area focus of screen. 3.8 screen-grid voltage and white balance adjustment a) receive a-7 signal, set user control to ?vivid?. b) select crt adj of factory menu, fixed c- off g(175), adjust c-off r, c-off b, drv-r, drv-b, till the white bal ance is normal basically. c) adjust potentiometer of screen till the bottom right two scales appear, now the screen voltage is about 530v10v. if screen voltage is normal, while the picture not, you can adjust sub bright and sub contrast of picture adj. d) fine adjust white balance (color tem perature:12000k8mpcd,x=0. 2700.008, y=0.2830.008) e) at yuv state adjust c-off r ycbcr, c-off b ycbcr, drv-r ycbcr, drv-b ycbcr, till the white balance is normal. 3.9 line, field c enter adjustment ntsc(60hz) line, field center adjustment receive a6 signal, set user control to ?standard?, ent er raster adj item, adjust field center v-pos, line center h-pos, let the center of pi cture coincide with center of screen. 3.10 field amplitude adjustment ntsc(60hz) field amplitude adjustment receive a12 signal, set user control to ?standard?, adjust field amplitude v- size, let the vertical reproduction ratio of picture acceptable 8%. 3.11 if the linearity and geometry ar e not satisfied, you may adjust t he following items of raster adj: corner para
5 trape vs-core v-lin 4. checking point 4.1 high voltage check connect high voltage meter between crt second anode and gnd. 1) receive a7 signal, set user control to ?sta ndard?, measure the high vo ltage value, the reading should be 25.5 kv 1 kv set the brightness and contrast to minimum (zero beam current), measure t he high voltage, the reading should not exceed 32kv. 4.2 crt filament voltage check receive a7 signal, set picture to ?standard?, use effective voltage meter to measure crt filament voltage, the reading should be (6.3 0.3) vrms 4.3 x-ray protection check 1) receive a7 signal, set us er control to ?vivid?. 2) short circuit r309 (tp302, tp303), x- ray protection circui t should function. 4.4 picture and sound check 1) receive standard tv signal. 2) use picture control buttons to check color, contrast, brightness, shar pness, tint?s function. 3) use sound control buttons to check volume control function. 4.5 sub-brightness check receive a7 signal, set user control to ?vivid?, picture bottom right side 2 lattices slightly light up. 4.6 color purity and convergence check (in normal way) 4.7 av terminals in/out check 4.8 y, cb, cr video and sound in check . 4.8 other buttons on the tv set and re mote controller function check. 5 ex-factory setting 5.1 picture menu contrast 45 bright 35 color 30 titn 0 sharpness 30 picture mode standard 5.2 volulme: 30 5.3 language: english 5.4 tv mode: channel 1 6 factory menu 6.1 enter factory menu method 1) press factory button to enter factory menu. 2) press ch+ or ch- to select sub-menu and vol+ or vol- to enter. 3) press menu to exit. 6.2 the content of fa ctory menu see table 1
6 table 1 factory menu factory menu 01. vif vco vif vco auto regulation 02. rf delay tuner agc adjustment 1: vcj adj 03. s-trap s-trap auto regulation 06. h vco h vco auto regulation 07. v-pos field center adjustment 08. v-size field amplitude adjustment 09. v-lin field linearity adjustment 10. vs-core corner adjustment 2: raster adj 11. h-pos line position adjustment 12. h-size field amplitude adjustment 13. para pincushion adjustment 14. conter angle adjustment 15. trape trapezia adjustment 16. c-off r tv-ntsc wh ite balance adjustment 17. c-off g 18. c-off b 19. drv-r 20. drv-b 21. c-off r ycbcr ycbcr white balance adjustment 22. c-off g ycbcr 23. c-off b ycbcr 24. drv-r ycbcr 3: crt adj 25. drv-b ycbcr 4: picture adj 1. sub bright sub bright adjustment 2. sub contrast sub contrast adjustment 5: user menu reset off user menu pre-set 6: service menu 7: aging off aging switch
7 working principle: power part: the power adopts thick film integrate circuit str-w6553 of sanken company, which embedded power mosfet and controller. it usually works at quasi-resonance or bottom- skip quasi-resonance and realizes the performance of high efficiency of switch power and lo w noise. work at gap oscillation when stand-by to reduce the power cons umption. small insulation packing( t0220-6l) can reduce the reality area and make the power smaller and standard. the des ign is simpler because of the little peripheral components. n102 pin3 (standby) output high level when standby, v503 b# is high level, and triode turn-on, v503 c# is low level. when the unit works normally, n102 pin3(standby) output low level, v503 cut-off, b+ takes samples of rp502, v501 then sends to n502 to monitor b+ fluctuation, the samples will be converted into current to adjust the power output. video and sound parts: TQ2092 adopts the super single ic r2j10161g8-a oofp(n102) with i2c bus controlled processor produced by renedas, which includes if, color decoder, 8-bits mcu, pre-video amplify, h/v deflection, av switch, audio processing, ect.. the main interfaces are: one av in, one s-video in, ycbcr, one av output. the signal flow is below: the antenna reception signal rf will be s ent to tuner, via hf a nd mixing, output if, via v111 after, it sent to saw z101 filtering and gain better if. then it feed to main ic n102 (r2j10161g8-aoofp) from 38#, 39# if amplify, phase-lock loop vco and synchronous detection, output from 34# as composite video signal vif-video. after filteri ng, vif-video changes to video-tv . video-tv and y component from av1/s, av2 and ycbcr via nb01(4052bp)9#,10# av/y, av1/ av2 (tv/av) select, output video, it will be sent to n102 form 32# again. c of s terminal is sent to n102 30#, component cb, cr is sent to n102 19#,20#, then video decoding and proce ssing, it sent to the internal rgb interface matrix, pre-video amplify, contrast, bright and bl acking, output rgb form 51#,52#,53#. after n102 internal video switch selecting, the video is sent to decoding and processing, it also output from 24# as av out. the main ic n102 has the h/v deflection inter nal. vdrv output from 11#, via n301(tda8177) amplifying to push the vert ical deflection coil. hdrv output from 15#, via v301(st1803df) driving to push the horizontal deflection coil. ew-out output form 25# via v303(2s c3852) driving then sent to the horizontal deflection. the if signal is sent to n102 from 38# 39# demodulat ing tv audio l/r. l/r of av1/s, av2, ycbcr via audio switch nb02(4052bp) selecting, it sent to n102 29#,43# switch selection and audio process together with tv audio signal, then output l/r from 46# 48#, it sent to sound amplifier nv01(tda7253) amplifying to push the speaker; at the same time, the l/r from 46# 48# is also audio of av out. the unit is control by the mcu built in n102, it connects tuner and e2prom through iic bus line and controls the whol e unit working.
8 block diagram ycbcr-a av 2 - a av 1 / s - a a l/r rf if iic av-a out l/r av1-v/s-y tv-v av 2 ycbcr-y v/y s-c ycbcr-cbcr rgb av-v out v h rgb vif, sif video processor audio processor chroma processor rgb interface ddy regulator mcu n102 r2j10161g8-aoofp eeprom n101 at24c08 audio sw 4052bp n b02 audio amp tda7253 nv01 video sw 4052bp n b01 tuner saw z101 speaker video amp 2sc2688m h-driver st1803df v301 v-driver n 301 tda8177 crt
9 ic block diagram: 1.r2j1016xfp
10 pin function voltage (v) pin function voltage (v) 1 s-in 5 80 p14 5.00 2 x-ray 5 79 sda 0 3 standby 0.04 78 p12 0 4 s_mutb 0.04 77 scl 5 5 test0 0 76 p10 0 6 av1/av2 av1/tv control 0.08 75 p15 0 7 av/y av/y control 0.04 74 remote 5.00 8 pal/n 0 73 key1 0.7 9 aft 2.5 72 p36 0 10 vcc + 8v 8 71 mcu +5v 5 11 vdrv 3 70 filt 2.1 12 vramp_cap 2.3 69 gnd 0 13 afc_fil 2.9 68 xout 5.00 14 vcc + 5v 5 67 xin 0.4 15 hout 1 66 gnd 0 16 fbp_in 0.85 65 p35 0 17 gnd 0 64 key2 5 18 agc 2 63 p26 0 19 cb_in 1.1 62 cvin 0 20 cr_in 1.1 61 vhold 0 21 c_apc 2.9 60 hlf 0 22 xtal crystal 4.43m 59 p22 0 23 gnd 0 58 p21 0 24 y_sw_out video output 3 57 p20 0 25 ew_out 3.2 56 mcu_resbt 5.00 26 mcu 5.7v 5.7 55 moni tor_out svm out 0.4 27 pal_fil 3.8 54 vreg 8.7v 8.7 28 vreg 8.7v 8.7 53 b_out 3.00 29 l_in 3.2 52 g_out 3.00 30 c_in 1.9 51 r_out 3.00 31 vcc +5v 5.00 50 hi_vcc 8 32 v/y in 2.4 49 abcl 2.5 33 vreg 5.7v 5.7 48 l_out 3.3 34 vif-video_out 3. 3 47 direct_out 3.3 35 vig_gnd 0 46 r_out 3.3 36 vif_apc 2.1 45 sif_mix 2.5 37 rf_agc 3.8 44 au_bypass 3.3 38 vif_in2 1.4 43 r_in 3.3 39 vif_in1 1.4 42 vif_vcc 5 40 vif_agc 2.6 41 vif_vco 3
11 2.str-w6553a pin function: no str-w6500 [t0220f-6l] str-x6500 [t03pf-7l] name function 1 d drain terminal drain of mosfet 2 - s 3 s/gnd gnd source/ground terminal mosfet source and ground 4 vcc power terminal control power input 5 ss/adj soft-start/over current protect over current protect and soft-start timer adjust 6 fb feed back terminal timing voltage control signal input gap oscillation control 7 bd bottom check terminal bottom check signal input and external latch signal input
12 3.tda7253
13 4.tda8177

15 troubleshooting guide 1. no raster, no sound 2. with picture, without sound if the powe r indicator is light? check i f fu501 is melted? check i f c510 has 300v? check d501 and its p eriphery check n501 n 502 an d their p eriphery there is short circui t at primary o r secondary coil o f p owe r the light is red, press power can?t turn o n the tv check if n102 56# output high level check if it is x-ra y p rotection press power to turn on and the light is blue check if n102 an d n101are normal refer to 2 and 3 ye s n o ye s n o n o ye s check if soun d amplifier nv01 has output speaker is damaged check if nv01 power supply is normal, if pin3 (mute) is high level if nv01 pin 1 an d p in5 have inpu t signal check if n102 46# and 48# have output signal ye s ye s n o n o
16 3. with sound, without picture n o with sound but withou t p icture check if b+ is normal if h/v circui t works normally? check if eac h group voltage o f fbt is normal check cr t b oard an d filament voltage check i f n 102 has rgb output check n102 and its p eriphery check cr t b oard, turner an d its periphery if v301c# output h-frequency if v301 is damaged ye s have raster n o raster abnormal n ormal

name no. main board 6tq05101l0 n102 n301 nv01 n501 r2j10165 (5271012502) stv8172a (5268172002) tda7263l (5267263001) strw6553a (5266553001) line output transformer t301 bsc26-n1013a(ul) ( 5432210043 ) side av board 6tq0112910 key board 6tq0170510 stereo board 6tq0113110 ns01 la72700v (5277270001) remote control 6010q03404 crt 520121470c appendix-a: main assembly 9520tq9218 main component and it's no. rc-q34-0d a51alj13x02a
9520tq9218 ver.1.0

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