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| printed in korea p/no : mfl67529901 (1207-rev00) chassis : ld93q model : 22ls2100 22LS2100-TA caution before servicing the chassis, read the safety precautions in this manual. led lcd tv service manual north/latin america http://aic.lgservice.com europe/africa http://eic.lgservice.com asia/oceania http://biz.lgservice.com internal use only http://
- 2 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes contents contents .............................................................................................. 2 safety precautions ........................................................................ 3 servicing precautions ................................................................... 4 specification ...................................................................................... 6 adjustment instruction ............................................................... 8 trouble shooting guide ............................................................... 12 block diagram ................................................................................. 23 exploded view .................................................................................. 24 schematic circuit diagram .............................................................. - 3 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes many electrical and mechanical parts in this chassis have special safety-related characteristics. these parts are identified by in the schematic diagram and exploded view. it is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent shock, fire, or other hazards. do not modify the original design without permission of manufacturer . general guidance an isolation transformer should always be used during the servicing of a receiver whose chassis is not isolated from the ac power line. use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. it will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation. if any fuse (or fusible resistor) in this tv receiver is blown, replace it with the specified. when replacing a high wattage resistor (oxide metal film resistor, over 1 w), keep the resistor 10 mm away from pcb. keep wires away from high voltage or high temperature parts. before returning the receiver to the customer, always perform an ac leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc., to be sure the set is safe to operate without damage of electrical shock. leakage current cold check(antenna cold check) with the instrument ac plug removed from ac source, connect an electrical jumper across the two ac plug prongs. place the ac switch in the on position, connect one lead of ohm-meter to the ac plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. if the exposed metallic part has a return path to the chassis, the measured resistance should be between 1 m and 5.2 m . when the exposed metal has no return path to the chassis the reading must be infinite. an other abnormality exists that must be corrected before the receiver is returned to the customer. leakage current hot check (see below figure) plug the ac cord directly into the ac outlet. do not use a line isolation transformer during this check. connect 1.5 k / 10 watt resistor in parallel with a 0.15 uf capacitor between a known good earth ground (water pipe, conduit, etc.) and the exposed metallic parts. measure the ac voltage across the resistor using ac voltmeter with 1000 ohms/volt or more sensitivity. reverse plug the ac cord into the ac outlet and repeat ac voltage measurements for each exposed metallic part. any voltage measured must not exceed 0.75 volt rms which is corresponds to 0.5 ma. in case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer. leakage current hot check circuit important safety notice safety precautions - 4 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes servicing precautions caution: before servicing receivers covered by this service manual and its supplements and addenda, read and follow the safety precautions on page 3 of this publication. note : if unforeseen circumstances create confict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. remember: safety first. general servicing precautions 1. always unplug the receiver ac power cord from the ac power source before; a. removing or reinstalling any component, circuit board mod - ule or any other receiver assembly. b. disconnecting or reconnecting any receiver electrical plug or other electrical connection. c. connecting a test substitute in parallel with an electrolytic capacitor in the receiver. caution : a wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explo - sion hazard. 2. test high voltage only by measuring it with an appropriate high voltage meter or other voltage measuring device (dvm, fetvom, etc) equipped with a suitable high voltage probe. do not test high voltage by "drawing an arc". 3. do not spray chemicals on or near this receiver or any of its assemblies. 4. unless specifed otherwise in this service manual, clean electrical contacts only by applying the following mixture to the contacts with a pipe cleaner, cotton-tipped stick or comparable non-abrasive applicator; 10 % (by volume) acetone and 90 % (by volume) isopropyl alcohol (90 % - 99 % strength) caution : this is a fammable mixture. unless specifed otherwise in this service manual, lubrication of contacts in not required. 5. do not defeat any plug/socket b+ voltage interlocks with which receivers covered by this service manual might be equipped. 6. do not apply ac power to this instrument and/or any of its electrical assemblies unless all solid-state device heat sinks are correctly installed. 7. always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. always remove the test receiver ground lead last. 8. use with this receiver only the test fxtures specifed in this service manual. caution : do not connect the test fxture ground strap to any heat sink in this receiver. electrostatically sensitive (es) devices some semiconductor (solid-state) devices can be damaged eas - ily by static electricity. such components commonly are called electrostatically sensitive (es) devices. examples of typical es devices are integrated circuits and some feld-effect transistors and semiconductor chip components. the following techniques should be used to help reduce the incidence of component dam - age caused by static by static electricity. 1. immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. alter - natively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent poten - tial shock reasons prior to applying power to the unit under test. 2. after removing an electrical assembly equipped with es devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or expo - sure of the assembly. 3. use only a grounded-tip soldering iron to solder or unsolder es devices. 4. use only an anti-static type solder removal device. some solder removal devices not classifed as anti-static can generate electrical charges suffcient to damage es devices. 5. do not use freon-propelled chemicals. these can generate electrical charges suffcient to damage es devices. 6. do not remove a replacement es device from its protective package until immediately before you are ready to install it. (most replacement es devices are packaged with leads electri - cally shorted together by conductive foam, aluminum foil or comparable conductive material). 7. immediately before removing the protective material from the leads of a replacement es device, touch the protective material to the chassis or circuit assembly into which the device will be installed. caution : be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. minimize bodily motions when handling unpackaged replace - ment es devices. (otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted foor can generate static electricity suf - fcient to damage an es device.) general soldering guidelines 1. use a grounded-tip, low-wattage soldering iron and appropriate tip size and shape that will maintain tip temperature within the range or 500 f to 600 f. 2. use an appropriate gauge of rma resin-core solder composed of 60 parts tin/40 parts lead. 3. keep the soldering iron tip clean and well tinned. 4. thoroughly clean the surfaces to be soldered. use a mall wire- bristle (0.5 inch, or 1.25 cm) brush with a metal handle. do not use freon-propelled spray-on cleaners. 5. use the following unsoldering technique a. allow the soldering iron tip to reach normal temperature. (500 f to 600 f) b. heat the component lead until the solder melts. c. quickly draw the melted solder with an anti-static, suction- type solder removal device or with solder braid. caution: work quickly to avoid overheating the circuit board printed foil. 6. use the following soldering technique. a. allow the soldering iron tip to reach a normal temperature (500 f to 600 f) b. first, hold the soldering iron tip and solder the strand against the component lead until the solder melts. c. quickly move the soldering iron tip to the junction of the component lead and the printed circuit foil, and hold it there only until the solder fows onto and around both the compo - nent lead and the foil. caution : work quickly to avoid overheating the circuit board printed foil. d. closely inspect the solder area and remove any excess or splashed solder with a small wire-bristle brush. - 5 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes ic remove/replacement some chassis circuit boards have slotted holes (oblong) through which the ic leads are inserted and then bent fat against the cir - cuit foil. when holes are the slotted type, the following technique should be used to remove and replace the ic. when working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above. removal 1. desolder and straighten each ic lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts. 2. draw away the melted solder with an anti-static suction-type solder removal device (or with solder braid) before removing the ic. replacement 1. carefully insert the replacement ic in the circuit board. 2. carefully bend each ic lead against the circuit foil pad and solder it. 3. clean the soldered areas with a small wire-bristle brush. (it is not necessary to reapply acrylic coating to the areas). "small-signal" discrete transistor removal/replacement 1. remove the defective transistor by clipping its leads as close as possible to the component body. 2. bend into a "u" shape the end of each of three leads remaining on the circuit board. 3. bend into a "u" shape the replacement transistor leads. 4. connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp the "u" with long nose pliers to insure metal to metal contact then solder each connection. power output, transistor device removal/replacement 1. heat and remove all solder from around the transistor leads. 2. remove the heat sink mounting screw (if so equipped). 3. carefully remove the transistor from the heat sink of the circuit board. 4. insert new transistor in the circuit board. 5. solder each transistor lead, and clip off excess lead. 6. replace heat sink. diode removal/replacement 1. remove defective diode by clipping its leads as close as pos - sible to diode body. 2. bend the two remaining leads perpendicular y to the circuit board. 3. observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board. 4. securely crimp each connection and solder it. 5. inspect (on the circuit board copper side) the solder joints of the two "original" leads. if they are not shiny, reheat them and if necessary, apply additional solder. fuse and conventional resistor removal/replacement 1. clip each fuse or resistor lead at top of the circuit board hollow stake. 2. securely crimp the leads of replacement component around notch at stake top. 3. solder the connections. caution: maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. circuit board foil repair excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or "lift-off" the board. the following guidelines and procedures should be followed whenever this condition is encountered. at ic connections to repair a defective copper pattern at ic connections use the following procedure to install a jumper wire on the copper pattern side of the circuit board. (use this technique only on ic connec - tions). 1. carefully remove the damaged copper pattern with a sharp knife. (remove only as much copper as absolutely necessary). 2. carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern. 3. bend a small "u" in one end of a small gauge jumper wire and carefully crimp it around the ic pin. solder the ic connection. 4. route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper pattern. solder the overlapped area and clip off any excess jumper wire. at other connections use the following technique to repair the defective copper pattern at connections other than ic pins. this technique involves the installation of a jumper wire on the component side of the circuit board. 1. remove the defective copper pattern with a sharp knife. remove at least 1/4 inch of copper, to ensure that a hazardous condition will not exist if the jumper wire opens. 2. trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly con - nected to the affected copper pattern. 3. connect insulated 20-gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side. carefully crimp and solder the connections. caution : be sure the insulated jumper wire is dressed so the it does not touch components or sharp edges. - 6 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes specification note : specifications and others are subject to change without notice for improvement . 1. application range this spec sheet is applied to the 22 led monitor tv used ld93q chassis. 2. requirement for test each part is tested as below without special appointment. 1) temperature: 25 c 5 c(77 f 9 f), cst: 40 c 5 c 2) relative humidity: 65 % 10 % 3) power voltage : standard input voltage (ac 100-240 v~, 50/60 hz) * standard voltage of each products is marked by models. 4) specification and performance of each parts are followed each drawing and specification by part number in accordance with bom. 5) the receiver must be operated for about 5 minutes prior to the adjustment. 3. test method 1) performance: lge tv test method followed 2) demanded other specification - safety : ce, iec specification - emc : ce, iec 4. general specification 4.1. rgb-pc no. item specifcation remarks 1 supported sync. type separate sync.(rgb), sog 2 operating frequency analog horizontal 30 ~ 69 khz vertical 56 ~ 61 hz 3 operating frequency analog max 19201080 @ 60hz recommend 19201080 @ 60hz 4 input voltage voltage :100 C 240 vac, 50 or 60 hz 5 inrush current cold start : 50 a, hot : 120 a 6 operating condition sync (h/v) video led wattage power s/w on on mode on/on active off(ptn,pmn) 48(max) on/on active 27(typ.) sleep mode off/on off blanking 1w rgb on/off power s/w off off mode - off red (ptn_pmn) 0.5w just operate power key and remote controller power button. 7 mtbf 30,000 hrs with 90 % confdence level lamp life : 30,000 hours(min) 8 using altitude 5,000 m (for reliability) 3,000m(for fos) 9 operating environment temp : 10 c ~ 35 c humidity : 20 % ~ 80 % 10 storage environment temp : -10 c ~ 60 c non condensing humidity : 5 % ~ 90 % non condensing - 7 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes no. item specifcation remarks 1. market non eu 2. broadcasting system pal b/g/dk,/i, ntsc-m 3. available channel (revision 21: 10.12.08) band pal ntsc china(dk) australia(bg) vhf/uhf c1~c69 2~78 vhf/uhf c1~c62 c1~c75 catv s1~s41 1~71 catv s1~s41 s2~s44 4. receiving system upper heterodyne 5. cvbs input (1ea) pal, secam, ntsc 4 system(rear) :pal50, secam, ntsc, pal60 6. rgb input rgb-pc analog (d-sub 15pin) 7. hdmi input (1ea) hdmi-dtv hdmi version 1.3 , support hdcp 8. audio input (1ea) cvbs l/r input 4.2. tv 5. rgb input ( pc ) no. resolution h-freq(khz) v-freq.(hz) pixel clock(mhz) proposed remark 1 640*480 31.469 59.94 25.175 2 800*600 37.879 60.317 40.0 3 1024*768 48.363 60.0 65.0 4 1152*864 54.34 60.05 80 5 1280*1024 63.981 60.02 108.0 6 1600*900 55.54 60 97.75 7 1680*1050 64.674 59.883 119.0 8 1680*1050 65.290 59.954 146.25 9 1920*1080 67.5 60 148.5 6. hdmi input (dtv) no resolution h-freq(khz) v-freq.(khz) pixel clock(mhz) proposed remarks 1 720*480 15.75 60.00 13.514 sdtv, dvd 480i(525i) support(not spec) 2 720*480 15.73 59.94 13.500 sdtv, dvd 480i(525i) support(not spec) 3 720*576 15.625 50.00 13.500 sdtv, dvd 576i(625i) 50hz support(not spec) 4 720*480 31.47 59.94 27.000 sdtv 480p 5 720*480 31.50 60.00 27.027 sdtv 480p 6 720*576 31.25 50.00 27.000 sdtv 576p 50hz 7 1280*720 44.96 59.94 74.176 hdtv 720p 8 1280*720 45.00 60.00 74.250 hdtv 720p 9 1280*720 37.50 50.00 74.25 hdtv 720p 50hz 10 1920*1080 33.72 59.94 74.176 hdtv 1080i 11 1920*1080 33.75 60.00 74.250 hdtv 1080i 12 1920*1080 28.125 50.00 74.250 hdtv 1080i 50hz 13 1920*1080 67.432 59.94 148.350 hdtv 1080p 14 1920*1080 67.5 60 148.5 hdtv 1080p 15 1920*1080 56.250 50 148.5 hdtv 1080p 50hz * hdmi jack is for av(video signal) - 8 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes adjustment instruction 1. application range this document is applied to ld93q chassis 22 led monitor tv which is manufactured in tv factory or is produced on the basis of this data. 2. designation (1) the adjustment is according to the order which is designated and which must be followed, according to the plan which can be changed only on agreeing. (2) power adjustment : free voltage. (3) magnetic field condition: nil. (4) input signal unit: product specification standard. (5) reserve after operation : above 5 minutes (heat run) temperature : at 25 c 5 c relative humidity : 65 10 % input voltage : 220 v, 60 hz (6) adjustment equipments: color analyzer (ca-210 or ca-110), pattern generator (mspg-925l or equivalent), ddc adjustment jig equipment, svc remote control 3. adc calibration 3.1. pc input adc (1) auto rgb gain/offset adjustment convert to pc in input-source signal equipment displays output voltage: 700mvp-p impress resolution xga (1024 x 768 @ 60hz) model: 60 in pattern generator (1024x768@60hz 16 step gray pattern) pattern: 29 in pattern generator (mspg-925 series) adjust by commanding auto_color_adjust (0xf1) 0x00 0x02 instruction (2) confirmation we confirm to address 0xf1 in page 0xbc of eeprom the value is 0xaa or not. if the value is not 0xaa, we adjust once more we can write the adc values from 0x00~0x05 addresses in a page 0x0e * manual adc process using service remocon. after enter service mode by pushing adj key, execute auto-rgb by pushing ? key at auto-rgb. 4. adjustment items 4.1. pcb assembly adjustment items 4.1.1. input tool-option, area option - option adjustment following bom (tool option, area option) (1) required equipments : remote control for adjustment (2) profile: must be changed the option value because being different with some setting value depend on module maker, inch and market. (3) adjustment method the input methods are same as other chassis. (use in-start key on the adjust remote control.) 1) push the in-start key in the adjust r/c. 2) input the option number that was specified in the bom, into the shipping area. 3) select tool option/ area option by using /(ch+/-) key, and press the number key(0~9) consecutively ex) if the value of tool option1 is 7, input the data using number key 7 (if not changed the option, the input menu can differ from the model spec.) * refer to job expression of each main chassis ass'y (ebtxxxxxxxx) for option value * before pcb check, you have to change the tool option, area option and have to ac off/on (plug out and in) (if missing this process, set can operate abnormally) * never push the in-stop key after completing the function inspection. case1 : software version up 1. after downloading s/w by usb , tv set will reboot automatically. 2. push in-stop key. 3. push power on key. 4. function inspection 5. after function inspection, push in-stop key. case2 : function check at the assembly line 1. when tv set is entering on the assembly line, push in-stop key at frst. 2. push power on key for turning it on. if you push power on key, tv set will recover channel information by itself. 3. after function inspection, push in-stop key. mspg-925 series rgb model : 60 (1024 x 768@ 60 hz) o g < 6 k # # # o j g # # # p 5 5 7 5 d # p d l q # # # y 4 1 3 3 # # # x w w # # # # [ # d g f 0 q j # # # h g l g 0 q j / # q j # # # # # # # # # # = w r r o # r s w l r q # # # # # # # # # # # # 5 4 ; 7 # d u h d # r s w l r q # # # # # # # # # # # # # # # # 4 # - 9 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes 4.2. s/w program download (1) profile : this is for downloading the s/w to the flash memory of ic603. (2) equipment 1) pc 2) mtk_tool program 3) download jig 4) usb (3) connection structure (4) connection condition 1) ic name and circuit number : flash memory and ic603 2) tact time : about 2min 4.3. download method 1 4.3.1. preliminary steps (1) connect the download jig to 4pin jack (p303) (2) connect the pc to usb jack 4.3.2. download steps (1) execute isp tool program in pc, then a main window will be opened (2) click the config and change speed (mt8223, using port, 115200, 4ms) (3) click the connect button and confirm (4) read and write bin file click (1) browse tab, and then load download file (xxxx. bin) by clicking and open. pc main b/d do wn load jig 4pin harnes s k ? ? ? ? ? g ? ? ? ? ? h k n g z z z d k p - 10 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes (5).click upgrade tab and set as below (6) after downloading, ac power off and on. 4.4. download method 2 1) connection usb memory for upgrade.( file name : mx42a_pmn_xxxx.bin or mx42a_ptn_xxxx.bin) 2) press the in start button. 3) select the upg fw menu 4) press the ?button and wait 5) if the progressive bar 100% will be completed - notice: do not plug out usb during upgrading. 5. check edid and write hdcp key - this model is no need to write. edid data is in program source 5.1. edid data (1) rgb edid data (2) hdmi edid data 1) all data are hexa 2) adjustable data : **: week ***: year ex) when year 2008: input 12 ****: check sum (deferent along week, year) 5.2. write hdcp key (1) connect d-sub signal cable to d-sub jack (2) input hdcp key with hdcp-key- in-program (3) hdcp key value is stored on main mtk ic (mtk8223) which is 0x80~0xa0 addresses of 0x00~0x01 page (eeprom map page0~page1 / start addr: a0 80) (4) ac off/on and on hdcp button of mspg925 and confirm whether picture is displayed or not of using mspg925 (5) hdcp key value is different among the sets o g < 6 t # # # o j g # # # p 5 5 7 5 d # p d l q # # # p y 4 1 3 3 # # # x w w # # # # 7 # d g f 0 r n # # # h g l g 0 r n / # # r n # # # # w r r o # r s w l r q # # # # # # # # # # # # # # # # # 5 4 ; 7 # d u h d # r s w l r q # # # # # # # # # # # # # # # # # # # # 4 # v | v w h p # f r q w u r o 4 # v | v w h p # f r q w u r o 5 # s r z h u # r i i # k l v w r u | # x s j # i z # no. item content 16bit data 1 manufacturer id gsm 1e6d 2 product id analog : 22860 hdmi : 22861 594c 594d 3 year 2012 16 4 version analog : 1 1 digital : 1 5 revision analog : 3 3 digital : 3 6 model name 22ls2100 - 11 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes 6. check of white balance rgb_gains are fixed data for each model. insert d-sub jack (i2c) which is connected with pc for white balance or equivalent device. total assembly line should be check whether the color coordinate(x, y) data refer to below table were meet or not. 6.1. required equipment remote controller for checking w/b color analyzer : ca-210 ch: 14 (lcd mnt, normal) 22ls2100 pc (for communication through rgb) pattern generator (mspg-925fs series) 6.2. connecting diagram of equipment for measuring (for automatic adjustment) (method 1, using iic, you connect rgb cable) (standard color coordinate and temperature when using the ca210 equipment) rgb_gains are fixed data for each model * when doing adjustment, please make circumstance as below. * w/b condition - ambient humidity : 20 % ~ 80 % - ambient temperature : 25 5 c 7. function check 7.1. check display and sound check input and signal items. (cf. work instructions) 1. tv 2. av (cvbs) 3. rgb (pc : 1920 x 1080 @ 60hz)(display only) 4. hdmi color temperature cool 9,300k k x=0.283 (0.03) y=0.298 (0.03) - 12 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes trouble shooting 1. no power-main pcba i s a d a p t e r o u t p u t v o l t a g e 1 9 . 4 v th ro ug h of jk 700? no po we r is 3. 3v at c7 71? c hec k wa ve f o rm of x6 00 y e s n o y e s n o y e s ch ec k ope n or sh or t at li ne . or c han ge ad ap te r. c hec k th e li ne s of ic 7 01, if th ere is any pr obl em at li ne, ch an ge ic 701 n o ch ec k li ne sh or t or op en be tw een ic 600 an d x 600 , ch ang e ic 600 or ch ang e x6 00 1 2 4 is 5v at c7 16 ? is 1. 1v at c7 37 ? 3 ye s c h e c k t h e l i n e s o f i c 7 0 4 , i c 7 0 6 i f t h e r e i s a n y p r o b l e m a t l i n e , ch ang e ic 704, ic 7 06. n o in se rt f/ w is 3. 3v at 1p in of p2 00 ? w hen pu sh po we r ke y, is 0v at 4p in of p 200 ? c h a n g e c o n t r o l or c hec k li ne sh or t or ope n of p 200 5 is t here an y wa ve r at 3p in of p 200 , w hen us e re mo te co nt ro lle r? 6 no ye s ch an ge ir bo ar d or c hec k li ne sh or t or ope n of p 200 no 4 x6 00 - 13 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes 2. no raster (power led blue, black screen) is 19. 4v at jk 700? no ra st er (s cr een is no t di sp la ye d) in se rt th e f/ w ba ck or r epl ac e lc d mo du le is 1. 1v at l701? is 3. 3v at l712? i s 1 . 2 5 v a t 2 p i n o f i c 7 0 2 ? is 2. 5v at 2p in of ic 7 03? y e s n o y e s n o y e s c h e c k l i n e s h o r t o r o p e n b e t w e e n i v 7 0 1 / i c 7 0 4 a n d i c 6 0 0 , i f t h e r e i s a n y p r o b l e m a t l i n e , c h a n g e i c 7 0 1 / i c 7 0 4 o r c h a n g e i c 6 0 0 no c h e c k o p e n o r s h o r t a t l i n e a n d w a f e r b e t w e e n i c 7 0 2 , i c 7 0 3 a n d i c 6 0 0 . i f t h e r e i s a n y p r o b l e m a t l i n e , c han ge ic 7 02, ic 703 or ic 600 1 2 i s 3 v a t 1 p i n o f i c 8 0 0 ? ye s i t i s n o t o v e r 3 v a t 1 p i n o f i c 8 0 0 . c h a n g e q 8 0 1 . o r c h e c k l i n e s h o r t o r o p e n b e t w e e n r 8 0 3 a n d 9 5 p i n o f i c 6 0 0 . c han ge ic 600. 4 3 no ch ec k ope n or sh or t at li ne . or c han ge ad ap te r is 5v at 1p in of p2 01 ? i f i s n o t u n d e r 1 . 5 v a t r 7 4 4 , c h a n g e q 7 0 2 o r c h e c k o p e n a n d s h o r t o f l i n e a m o n g q 7 0 3 a n d q 7 0 2 . i f i s u n d e r 4 . 8 v a t l 7 1 0 , c h e c k o p e n a n d s h o r t of li ne be tw een l710 an d p 201 . 6 no p u t i n t o l v d s c a b l e c o m p l e t e l y ? lv ds ca bl e ha ve da ma ge ? n o i f l v d s c a b l e i s n t i n s u l t e d e n o u g h , i n s u l t l v d s c a b l e u n t i l l o c k i n g h o o k . if lv ds ca bl e ha ve da ma ge , c han ge lv ds ca bl e 5 yes y e s - 14 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes 3. abnormal/no screen (all input)-main pcba pu t in to lv ds ca ble co mp le te ly ? lv ds ca ble ha ve da ma ge ? ab no rm al /n o scr ee n (a ll in pu t) c h e c k w a v e f o r m a t s i g n a l li n e o f p 2 0 1 ( c lo c k : 1 0 , 1 1 , 2 2 , 2 3 d a t a : 8 , 9 , 1 2 , 1 3 , 1 5 , 1 6 , 1 8 , 1 9 , 2 0 , 2 1 , 2 5 , 2 6 , 2 7 , 2 8 , 2 9 , 3 0 ) y e s n o y e s n o y e s i f l v d s c a b l e i s n t i n s u l t e d e n o u g h , i n s u l t l v d s c a b l e u n t i l l o c k i n g h o o k . i f lv ds ca bl e ha ve da ma ge , ch an ge lv ds ca bl e 1 c h a n g e m o d u l e w a vef or ms 3 i s 5v at 1p in of p 201 ? i f i s n o t u n d e r 1 . 5 v a t r 7 4 4 , c h a n g e q 7 0 2 o r c h e c k o p e n a n d s h o r t o f l i n e a m o n g q 7 0 3 a n d q 7 0 2 . i f i s u n d e r 4 . 8 v a t l 7 1 0 , c h e c k o p e n a n d s h o r t o f l i n e b e t w e e n l 7 1 0 a n d p 2 0 1 . 2 3 n o c h e c k o p e n a n d s h o r t o f lin e be tw e en q703 an d p 201 . or ch ec k lv ds ca bl e hav e da ma ge . an ot her is ch an ge ic 600 . 8 , 9 , 1 2 , 1 3 , 1 5 , 1 6 , 1 8 , 1 9 , 2 0 , 2 1 , 2 5 , 2 6 , 2 7 , 2 8 , 2 9 , 3 0 p i n o f p 2 0 1 ( d at a li ne ) 1 0 , 1 1 , 2 2 , 2 3 p i n o f p 2 0 1 ( c lo c k li n e ) - 15 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes 4. abnormal screen (tv)-main pcba pu t in to rf ca bl e co mp le te ly ? ab no rm al scr een (t v) ye s n o n o in su lt rf ca bl e ti gh t an d th en ca bl e nu t sc rew ti gh t. 1 c hang e ma in pc ba wa vef or ms is 5v at 5p in of tu 401? 2 is i2 c wa ve f o rm at 6, 7p in of tu 401? 3 4 is if wa ve f o rm at 67 , 68 pi n of ic 600? no no 3 7p in of tu 401 (s cl ) 6p in of tu 401 (s da ) 4 67 , 68p in of ic 60 0 i f 4 . 9 v i s n o t a t p l u s p i n o f l 7 0 5 , c h e c k i t i s o v e r 3 v a t 2 p i n o f i c 7 0 6 , i f i t i s n o t , c h e c k l i n e b e t w e e n i c 7 0 6 a n d i c 6 0 0 i s o p e n o r s h o r t . an ot her is ch an ge ic 706 c h e c k l i n e b e t w e e n t u 4 0 1 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e i c 6 0 0 o r t u 4 0 1 c h e c k l i n e b e t w e e n t u 4 0 1 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e i c 6 0 0 o r t u 4 0 1 - 16 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes 5. abnormal screen (av)-main pcba pu t in to av ca bl e co mp le te ly ? ab no rm al sc reen (a v) y e s n o no in su lt av ca bl e ti gh t 1 c hang e ic 60 0 wa ve fo rm s is in pu t si g nal ti mi ng and f o rm at in sp ec ? c han ge ti mi ng to 480i , 576i or ch an ge f o rm at cv bs 2 is wa ve f o rm at r6 51 3 c h e c k l i n e b e t w e e n j k 1 0 1 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e a v c a b l e no y e s y e s r6 51 (c vbs) 3 - 17 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes 6. abnormal screen (rgb pc)-main pcba pu t in to rg b ca bl e co mp le te ly ? ab no rm al scr e en (r gb pc ) y e s n o no in su lt rg b ca bl e ti gh t 1 c hang e ic 600 wa vef or ms is in pu t si gn al ti mi ng and f o rm at in sp ec ? ch ang e ti mi ng ac co rd in g to pr od uc t sp ec , or c han ge f o rm at to rg b 2 i s w a v e f o r m a t r 6 2 8 , r6 30, r6 34 3 c h e c k l i n e b e t w e e n p 3 0 2 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e r g b c a b l e no y e s y e s 3 r 630(g) r6 34(r ) r 628(b ) - 18 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes 7. abnormal screen (hdmi)-main pcba pu t in to rg b ca bl e co mp le te ly ? ab no rm al scr e en (r gb pc ) y e s n o no in su lt rg b ca bl e ti gh t 1 c hang e ic 600 wa vef or ms is in pu t si gn al ti mi ng and f o rm at in sp ec ? ch ang e ti mi ng ac co rd in g to pr od uc t sp ec , or c han ge f o rm at to rg b 2 i s w a v e f o r m a t r 6 2 8 , r6 30, r6 34 3 c h e c k l i n e b e t w e e n p 3 0 2 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e r g b c a b l e no y e s y e s 3 r 630(g) r6 34(r ) r 628(b ) - 19 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes 8. no sound (all source )-main pcba do es wi re co nnec t p5 01 wi th sp ea ke r? no so un d (a ll so ur ce ) ye s n o y e s n o y e s co nne ct wi re be tw een p5 01 an d sp ea ke r. 1 c hang e sp eak er an d wi re i s 1 9 . 4 v a t 2 , 3 4 , 4 0 , 4 4 p i n of ic 502 ? i f 8 v i s n o t p l u s a t l 7 0 3 , c h e c k o f j k 7 0 0 i s o p e n . i f i s n o t c h e c k l i n e b e t w e e n l 7 0 3 a n d i c 5 0 2 i s o p e n o r s h o r t . .a no th er is ch an ge ic 502 2 no is 3. 3v at 13, 27 pi n of ic 502? i f 3 v i s n o t p l u s 1 3 , 2 7 p i n o f i c 5 0 2 , c h e c k i t i s o v e r 3 v a t l 5 0 1 , l 5 0 4 , i f i t i s n o t , c h e c k l i n e b e t w e e n l 7 1 2 a n d i c 5 0 2 i s o p e n o r s h o r t . a n o t h e r i s c h a n g e i c 7 0 1 , i c 5 0 2 n o 3 4 ye s i s i 2 c w a v e f o r m a t 23, 24 pi n of ic 502 ? c h e c k l i n e b e t w e e n i c 5 0 2 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e i c 5 0 2 o r i c 6 0 0 . n o 5 i s i 2 s w a v e f o r m a t r5 10, r 511, r5 12 ,r 51 3? 6 c h e c k l i n e b e t w e e n i c 5 0 1 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e i c 5 0 2 o r i c 6 0 0 . ye s is th ere an y wa ve f o rm p 501 ? c h e c k l i n e b e t w e e n i c 5 0 2 a n d p 5 0 1 i s o p e n o r s h o r t . a n d t h e n c h e c k r e s i s t a n c e o f s p e a k e r i s u n d e r 4 o h m . a n o t h e r i s c h a n g e i c 5 0 2 n o 4 23p in of ic 50 2 24 pi n of ic 502 5 r5 13(s do ) r 511(w s) r5 12(s ck ) 5 r5 10(m cl k) 6 1p in of p5 01(a ud io ou t) - 20 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes 9. abnormal sound (tv)-main pcba pu t in to rf ca bl e co mp le te ly ? ab no rm al so un d (t v) y e s n o no in su lt rf ca bl e ti gh t an d th en ca bl e nu t sc rew ti gh t. 1 c hang e ma in pc ba wa vef or ms is 5v at 5p in of tu 401? if 4. 9v is no t at pl us pi n of l706 , c hec k it is ov er 3v at 2p in of ic 706 , if it is no t, ch ec k li ne be tw e en ic 7 06 and ic 600 is op en or sh or t. an ot her is ch ang e ic 70 6 2 i s i 2 c w a v e f o r m at 6, 7p in of tu 401? 3 c h e c k l i n e b e t w e e n t u 4 0 1 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e i c 6 0 0 o r t u 4 0 1 4 i s i f w a v e f o r m a t 6 7 , 68 pi n of ic 600 ? c h e c k l i n e b e t w e e n t u 4 0 1 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e i c 6 0 0 o r t u 4 0 1 no no 3 7p in of tu 401 (s cl ) 6p in of tu 401 (s da ) 4 67, 68 pi n of ic 60 4 - 21 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes 10. abnormal sound (av)-main pcba pu t in to av ca bl e co mp le te ly ? ab no rm al so un d (a v) ye s n o in su lt av ca bl e ti gh t 1 c hang e ic 60 0 wa ve fo rm s is wa ve f o rm at c6 88, c 689 2 c h e c k l i n e b e t w e e n j k 1 0 1 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e a v c a b l e n o y e s c 688, c6 89 (aud io in ) 2 - 22 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes 11. abnormal sound (hdmi)-main pcba pu t in to hd mi ca bl e co mp le te ly ? ab no rm al so un d (h dm i) y e s n o no in su lt ed hd mi ca bl e 1 c hang e ic 60 0 is in pu t si g nal ti mi ng and f o rm at in sp ec ? c han ge ti mi ng ac co rd in g to pr od uc t sp ec , ch an ge f o rm at to pc m 2 is wa ve f o rm at r3 19 , r 320 3 c h e c k l i n e b e t w e e n j k 3 0 0 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e h d m i c a b l e no y e s y e s is wa ve f o rm at r3 21, r3 22 , r 323, r3 24 ,r 325 ,r 32 6 ye s 4 c h e c k l i n e b e t w e e n j k 3 0 1 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e h d m i c a b l e no c an read ed id an d hd cp ke y th ou gh 16 ,1 5p in of jk 30 0 c h e c k l i n e b e t w e e n j k 3 0 0 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e i c 6 0 2 o r h d m i c a b l e ye s is 5v at 19p in of jk 300 ? c h e c k l i n e b e t w e e n j k 3 0 0 a n d i c 6 0 0 i s o p e n o r s h o r t , a n o t h e r i s c h a n g e i c 6 0 0 o r h d m i c a b l e 5 ye s 6 - 23 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes x ` } x ` } ? ? ? ? k j v k j i q { z u z } g z ? ? ? ? g ? ? \ ? ? ? ? ? ? ? ? { t k z v o k t p g y } p m g k ? t ? ? ? ? k ? ? ? ? ? ? ? ? ? g ? ? ? ? ? ? h k j h ? ? ? ? g ? ? ? ? ? ? ? ? ? z ? ? ? ? ? } ? ? ? ? ? ? ? ? ? ? ? ? ? s } k z g { z ? ? ? ? ? l l w y v t l l w y v t l l w y v t h k j z ? ? ? ? ? ? h ? ? o ^ ~ p s j k ? ? ? ? ? ? m ? ? ? ? ? ? ? ? ? h k j ? ? ? ? ? ? ? ? g ? ? ? ? ? ? v z k v s | { j ? ? ? ? ? ? p y s l k ? ? ? ? ? ? ? g ? ? ? ? ? ? ? ? { ? ? ? z p m g k ? t ? ? ? ? s k v y u \ ? ? z k y t j | ] [ t g z k y h t j } i z k g ? ? ? o k t p y m z u z ? ? h } j j x u x } ? } j j r x u y \ ? ? h } k k \ ? ? ? ? ? ? ? ? g o t y y [ y h p s } k z x ` y w x w _ w g ] w ? ? x z _ u \ t ? ? y [ t ? ? t { _ y y z s k j v k j k j v k j k j v k j s k v h ? ? ? ? ? ? i q { { ? ? ? { ? ? ? { ? ? ? v ? g x y ? ? ? ? ? ? ? ? g o t y [ [ y h p % / 2 & . ' , $ * 5 $ 0 - 24 - lge internal use only copyright ? lg electronics. inc. all rights reserved. only for training and service purposes a2 a21 a31 a10 * set + stand 900 200 400 540 800 910 120 300 510 51 1 500 502 501 lv1 410 exploded view many electrical and mechanical parts in this chassis have special safety-related characteristics. these parts are identified by in the schematic diagram and exploded view . it is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent x-radiation, shock, fire, or other hazards. do not modify the original design without permission of manufacturer . important safety notice ap c p c w m _4828539 : w p_global_p f w p_global_pf ap c p c w m _4828539 : w p _ g l o ba l_ p f w p _ g l o ba l_ pf copyright ? 2012 lg electronics. inc. all rights reserved. only for training and service purposes lge internal use only ap c p c w m _4828539 : w p_global_p f w p_global_pf ap c p c w m _4828539 : w p _ g l o ba l_ p f w p _ g l o ba l_ pf copyright ? 2012 lg electronics. inc. all rights reserved. only for training and service purposes lge internal use only ap c p c w m _4828539 : w p_global_p f w p_global_pf ap c p c w m _4828539 : w p _ g l o ba l_ p f w p _ g l o ba l_ pf copyright ? 2012 lg electronics. inc. all rights reserved. only for training and service purposes lge internal use only ap c p c w m _4828539 : w p_global_p f w p_global_pf ap c p c w m _4828539 : w p _ g l o ba l_ p f w p _ g l o ba l_ pf copyright ? 2012 lg electronics. inc. all rights reserved. only for training and service purposes lge internal use only ap c p c w m _4828539 : w p_global_p f w p_global_pf ap c p c w m _4828539 : w p _ g l o ba l_ p f w p _ g l o ba l_ pf copyright ? 2012 lg electronics. inc. all rights reserved. only for training and service purposes lge internal use only ap c p c w m _4828539 : w p_global_p f w p_global_pf ap c p c w m _4828539 : w p _ g l o ba l_ p f w p _ g l o ba l_ pf copyright ? 2012 lg electronics. inc. all rights reserved. only for training and service purposes lge internal use only ap c p c w m _4828539 : w p_global_p f w p_global_pf ap c p c w m _4828539 : w p _ g l o ba l_ p f w p _ g l o ba l_ pf copyright ? 2012 lg electronics. inc. all rights reserved. only for training and service purposes lge internal use only |
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