Sharp 21LF-90C Manuel de service

SERVICE MANUALParts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones

LC-90LE740X3 – 1LC-90LE740XService Manual CHAPTER 3. DIMENSIONS[1] DIMENSIONS

LC-90LE740X4 – 1LC-90LE740XService Manual CHAPTER 4. REMOVING OF MAJOR PARTS[1] REMOVING OF MAJOR PARTS1. Removing of Stand Unit and Rear Cabinet Ass’

LC-90LE740X4 – 22. Removing of Speaker (L/R), Speaker (Woofer) and KEY Unit.1. Disconnect the SP wire.2. Remove the 2 lock screws (1) and detach the S

LC-90LE740X4 – 33. Removing of Connectors, 90” LCD Panel Module Unit Ass’y.1. Disconnect the following connectors from the MAIN Unit. (LV, PD)2. Disc

LC-90LE740X4 – 44. Removing of LCD CONTROL Unit, MAIN Unit, POWER/DRIVE Unit.1. Remove the 5 lock screws (1) and detach the Shield (MAIN) (2).2. Remo

LC-90LE740X4 – 55. Removing of R/C LED Unit, EMBLEM Unit, 3D IR Unit.1. Detach the R/C LED Unit (1).2. Disconnect the RA wire.3. Detach the EMBLEM Uni

LC-90LE740X4 – 6[2] The location putting on the heat measure sheet1. MAIN PWB Unit2. LCD Control UnitPSPA Z C8 71WJK ZPSPA Z C8 54WJK Z

LC-90LE740X4 – 7[3] Precautions for assembly1. Points to be checked and precautions when servicing the unitMount the main PWB Ass’y on the backlight c

LC-90LE740X4 – 8The following is a drawing mounting the main PWB Ass’y on the backlight chassis. (The parts indicated by -> are the access holes fo

LC-90LE740X5 – 1LC-90LE740XService Manual CHAPTER 5. ADJUSTMENT[1] ADJUSTMENT PROCEDUREMain unit supplied as service unit was adjusted on some item.Ho

LC-90LE740X iLC-90LE740XService Manual SAFETY PRECAUTIONIMPORTANT SERVICE SAFETY PRECAUTIONWARNING1. For continued safety, no modification of any cir

LC-90LE740X5 – 22.2.3 How to upgrade the software1. Unplug the AC cord.2. Insert the USB Memory for version upgrade into USB1.3. Plug in the AC cord w

LC-90LE740X5 – 32.3. Monitor microprocessor software version upgradeCreate the USB memory for monitor microprocessor software version upgrade in the s

LC-90LE740X5 – 43. Entering and exiting the adjustment process mode1) Before entering the adjustment process mode, the AV position RESET in the video

LC-90LE740X5 – 55. List of adjustment process mode menuThe character string in brackets [ ] will appear as a page title in the adjustment process menu

LC-90LE740X5 – 65/201 HDMI CEC TEST Enter HDMI CEC test2 HDMI EDID WRITE Enter HDMI EDID WRITING3 INSPECT USB TERM PORT ALL : - - - - - - Reading insp

LC-90LE740X5 – 714/201 T-CON VERSION EXT.12 T-CON VERSION EXT.23 T-CON VERSION EXT.34 T-CON VERSION EXT.415/201 3D HDMI FPGA Version22D→3D FPGA Versio

LC-90LE740X5 – 86. Special features* STANDBY CAUSE (Page 1/20)Display of a cause (code) of the last standbyThe cause of the last standby is recorded i

LC-90LE740X5 – 98. Panel size and model setting9. LCD Panel Adjustment11 Communication Error H Regular communication Time-out16 LCD Module Error Lamp

LC-90LE740X5 – 1010. Video signal adjustment procedureThe adjustment process mode menu is listed in Section 5.Signal generator level adjustment check

LC-90LE740X5 – 1110.4. NTSC signal adjustment10.5. SECAM adjustment10.6. ADC adjustment (Component 15K)Adjustment point Adjustment conditions Adjustm

LC-90LE740XiiPRECAUTIONS FOR USING LEAD-FREE SOLDEREmploying lead-free solder• “PWBs” of this model employs lead-free solder. The LF symbol indicates

LC-90LE740X5 – 1210.7. ADC adjustment (Component 33K)10.8. PC signal adjustment (ANALOG RGB)11. White Balance AdjustmentFor white balance adjustment,

LC-90LE740X5 – 1312. Key writing12.1. EDID writing (Main PWB: QPWBXF953WJ**)12.2. MAC key writing (MAIN PWB: QPWBXF953WJ**)1. Write the MAC key data o

LC-90LE740X5 – 14[2] PUBLIC MODE SETTING PROCEDURE1. How to start Public ModeStarting the Public Mode• There is one following ways to display the PUBL

LC-90LE740X5 – 154. Public Mode MenuThe guidance is not displayed on screen.Setup procedure• To move the cursor up and down, use the “cursor UP/DOWN”

LC-90LE740X5 – 165. On Setting Items1) Power ON fixed [POWER ON FIXED]If the power button is pressed in the ordinary mode in setting to “FIXED_ALL” an

LC-90LE740X5 – 174) Volume fixed [VOLUME FIXED]5) Volume fixed level [VOLUME FIXED LEVEL]6) Remote control operation [RC BUTTON]7) Main Unit Operation

LC-90LE740X5 – 188) Menu operation [MENU BUTTON]9) AV position fixed [AV POSITION FIXED]10) OSD display [ON SCREEN DISPLAY]Option “RESPOND” or “NO RE

LC-90LE740X5 – 1911) Start mode [INPUT MODE START]Example of option: “NORMAL”, “TVD (002TV)”, “INPUT1”, “INPUT2”, “INPUT3”, “HDMI1”, “HDMI2”, “HDMI3”

LC-90LE740X5 – 2015) 232C power ON control [232C POWON]16) Public mode setting [PUBLIC MODE]Option “ENABLE” or “DISABLE” (loop enabled)Default DISAB

LC-90LE740X5 – 21[3] USB Clone SpecificationsInput “369” as password on the copy mode screen using the same input method as Public Mode on the previou

LC-90LE740X iiiLC-90LE740XService Manual OUTLINEMAJOR SERVICE PARTSPWB UnitNOTE: *1 Replace MAIN PWB Units (DKEYMF953FMJ6) in case of IC3104 failure.

LC-90LE740X5 – 223. USB Clone Restrictions• Be sure to set the network setting (Setup/View setting/Network setup) after writing the data by USB Clone

LC-90LE740X6 – 1LC-90LE740XService Manual CHAPTER 6. TROUBLESHOOTING TABLE[1] Failure diagnosis by LED in front of cabinet [2] LED flashing specificat

LC-90LE740X6 – 2Table 1. Concrete flashing pattern*2: They depend on the system. Power supply error is defined from product to product.*3: For details

LC-90LE740X6 – 33. New methodLED flashing timing chart at the time of an error1) Inverter/Lamp failure details (Flashes slowly once and flashes fast)

LC-90LE740X6 – 44) Other failure details (Flashes slowly 4 times and flashes fast) NoteError type Center icon LE

LC-90LE740X6 – 5[3] TROUBLESHOOTING TABLE• LED Backlight does not turn on.If it is not an error of power supply/LED driver,It is start-up in the lamp

LC-90LE740X6 – 6Trouble Shooting Panel ModuleWhen C-S FPC is replaced, does screen display normally?NOYESReplace C-S FPC.When C-PWB is replaced, does

LC-90LE740X6 – 7• Picture does not display.Trouble Shooting LCD controller board(C-PWB)A screen isn't displayed.(The LED Backlight has shone at s

LC-90LE740X6 – 8<HDMI input> No video (1)-1HDMI: No external input video [INPUT-1]Is INPUT-1 selected on the input select menu screen? NO Select

LC-90LE740X6 – 9<HDMI input> No video (1)-2HDMI: No external input video [INPUT-2]Is INPUT-2 selected on the input select menu screen? NO Select

LC-90LE740X1 – 1LC-90LE740XService Manual CHAPTER 1. SPECIFICATIONS[1] SPECIFICATIONS

LC-90LE740X6 – 10<HDMI input> No video (1)-3HDMI: No external input video [INPUT-3]Is INPUT-3 selected on the input select menu screen? NO Selec

LC-90LE740X6 – 11<HDMI input> No video (1)-4HDMI: No external input video [INPUT-4]Is INPUT-4 selected on the input select menu screen? NO Selec

LC-90LE740X6 – 12No video (2)COMPONENT: No external input video [INPUT-5]Is INPUT-5 selected on the input select menu screen?Is the INPUT-SELECT for t

LC-90LE740X6 – 13No video (3) COMPSITE: No external input video [INPUT-5] COMPSITE: No external input video [INPUT-6] Is INPUT-5 selected on the input

LC-90LE740X6 – 14No video (4)PC: No external input video [INPUT7]Is the INPUT-7 selected on the input select menu screen?YESNOSelect INPUT-7 on the in

LC-90LE740X6 – 15No video (5)No video at UHF/VHF broadcast signal reception No video at digital broadcast signal receptionIs the specified TV signal s

LC-90LE740X6 – 16No video (6)MHL:No external input video [INPUT-4] (using MHL Cable with Mobile Phone)Is INPUT-4 selected on the input select menu scr

LC-90LE740X6 – 17• Does not sound.No audio (1)INPUT-6 No audio. INPUT-5 No audio.Is INPUT-6 selected on the input select menu screen?Is INPUT-5 select

LC-90LE740X6 – 18No audio (2)[PC analog audio input] INPUT-7 No audio. [HDMI analog audio input] INPUT-2 No audio. Is INPUT-7 selected on the input se

LC-90LE740X6 – 19No audio (3)No audio at UHF/VHF broadcast signal reception. No audio at digital broadcast signal reception.Is TV selected on the inpu

LC-90LE740X2 – 1LC-90LE740XService Manual CHAPTER 2. OPERATION MANUAL[1] OPERATION MANUAL

LC-90LE740X6 – 20No audio (4)INPUT-1 No audio (HDMI connected)INPUT-2 No audio (HDMI connected)INPUT-3 No audio (HDMI connected)INPUT-4 No audio (HDMI

LC-90LE740X6 – 21No audio signal at Digital Audio Output terminal (Analog sound heard)No INPUT-1/2/3/4 (HDMI) audio. No audio at digital broadcast sig

LC-90LE740X6 – 22No monitor audio outputAre there the audio signal outputs at pins (AN34) (HP_MONITOR_L) and (AN3532) (HP_MONITOR_R) of IC3301 (CPU)?Y

LC-90LE740X7 – 1LC-90LE740XService Manual CHAPTER 7. MAJOR IC INFORMATIONS[1] MAJOR IC INFORMATIONS1. MAJOR IC INFORMATIONS1.1. IC2601 (VHiSii9387A-1Q

LC-90LE740X7 – 21.12. IC1703 (VHiYSS952QZ-1Y)Audio DSP (YSS952QZ) has digital audio adjustment function (for example, PEQ, bass/treble, balance, bass

LC-90LE740X8 – 1LC-90LE740XService Manual CHAPTER 8. OVERALL WIRING/SYSTEM BLOCK DIAGRAM[1] OVERALL WIRING DIAGRAM12310976548JABCDEFGHI1311 1918161514

LC-90LE740X8 – 2[2] SYSTEM BLOCK DIAGRAM12310976548JABCDEFGHI1311 191816151412 17\\+%/6(*&*8%&KIKVCN#8FGEQFG/CKP%2714

PARTS GUIDEParts marked with " " are important for maintaining the safety of the set. Be sure to replace theseparts with specified ones for

LC-90LE740X2NO. PARTS CODEPRICE RANKNEW MARKPART DELIVERYDESCRIPTION[1] PRINTED WIRING BOARD ASSEMBLIESN DKEYMF953FMJ6 CB N V MAIN UnitN DUNTKF800FMF8

LC-90LE740X 3[3] CABINET AND MECHANICAL PARTS421313131337SB333119L2L1FPOWER/DRIVEUnitPDPL90" LCD PanelModule UnitCFL2L181144KMKEYUnit161416161416

LC-90LE740X2 – 2

LC-90LE740X4NO. PARTS CODEPRICE RANKNEW MARKPART DELIVERYDESCRIPTION[3] CABINET AND MECHANICAL PARTS1 Not Available - N - Decoration Frame Ass'y1

LC-90LE740X 5[4] SUPPLIED ACCESSORIES/PACKING PARTS (NOT REPLACEMENT ITEM)X4X5X6X7X12X8X10S11X9X1X2X3S7S7S7S8S8S8S9S9S3S10S5S2S6S1S4S16Standunit X4ACc

LC-90LE740X6NO. PARTS CODEPRICE RANKNEW MARKPART DELIVERYDESCRIPTION[4] SUPPLIED ACCESSORIES/PACKING PARTS (NOT REPLACEMENT ITEM)X1 CDAi-A806WJ34 BN J

LC-90LE740X

LC-90LE740XCOPYRIGHT © 2012 BY SHARP CORPORATIONALL RIGHTS RESERVED.No Part of this publication may be reproduced,stored in a retrieval system, or tra

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