Sharp LC-90Y8T Service Manual
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Sharp LC-90Y8T Service Manual

Sharp LC-90Y8T Service Manual

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In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its orig-
inal condition and only parts identical to those specified should be used.
CAUTION ............................................... . ............i
OUTLINE
MAJOR SERVICE PARTS ..................... . .......... iii
CHAPTER 1. SPECIFICATIONS
[1]
SPECIFICATIONS ................................. . ....... 1-1
[1]
OPERATION MANUAL .......................... . ....... 2-1
[1]
DIMENSIONS ........................................ . ....... 3-1
[1]
REMOVING OF MAJOR PARTS ........... . ....... 4-1
[2]
sheet ...................................................... . ....... 4-6
[3]
Precautions for assembly....................... . ....... 4-7
Parts marked with "
" are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the
safety and performance of the set.

SERVICE MANUAL

LCD COLOR TELEVISION

MODEL
CONTENTS
CHAPTER 5. ADJUSTMENT
[1]
ADJUSTMENT PROCEDURE ......................5-1
[2]
DURE................................................5-16
[3]
USB Clone Specification...................5-23
CHAPTER 6. TROUBLESHOOTING TABLE
[1]
[2]
error (Center icon LED used) ................ 6 -3
[3]
TROUBLESHOOTING TABLE ......................6-5
[1]
MAJOR IC INFORMATIONS .........................7-1
CHAPTER 8. OVERALL WIRING/SYSTEM BLOCK
DIAGRAM
[1]
OVERALL WIRING DIAGRAM ......................8-1
[2]
SYSTEM BLOCK DIAGRAM .........................8-2
No. SY3M38LC-90Y8T
:
LC-90Y8T
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
........6-1

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Summary of Contents for Sharp LC-90Y8T

  • Page 1: Table Of Contents

    SERVICE MANUAL No. SY3M38LC-90Y8T LCD COLOR TELEVISION LC-90Y8T MODEL In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its orig- inal condition and only parts identical to those specified should be used.

  • Page 2: Safety Precaution

    LC-90Y8T SAFETY PRECAUTION IMPORTANT SERVICE PRECAUTION IMPORTANT SERVICE SAFETY PRECAUTION Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow: WARNING • Use an AC voltmeter having with 5000 ohm per volt, or higher, sen- 1.

  • Page 3: Precautions For Using Lead-Free Solder

    LC-90Y8T PRECAUTIONS FOR USING LEAD-FREE SOL- PRECAUTIONS FOR USING LEAD-FREE SOLDER Employing lead-free solder • PWBs of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type oflead-free solder.

  • Page 4: Major Service Parts

    LC-90Y8T OUTLINE -MAJOR SERVICE PARTS MAJOR SERVICE PARTS PWB UNIT Ref No. Part r c s t p i n o i UNIT UNIT UNIT DUNTKG017FMF17 3D IR UNIT UNIT OTHER UNIT Ref No. Part r c s t p i...

  • Page 5: Specifications

    The HDMI 2 and 電腦 (PC) terminals can both use the same audio input terminal. • As a part of our policy of continuous improvement, SHARP reserves the right to make design and specification changes for product improvement without prior notice. The performance specification figures indicated are nominal values of production units. There may be some deviations from these values in individual units.

  • Page 6: Chapter 2. Operation Manual

    LC-90Y8T CHAPTER 2. OPERATION MANUAL [1] OPERATION MANUAL Part names and functions TV (front view) This panel emits infrared signal towards the 3D glasses you wear when viewing 3D images. Do not place anything between the 3D infrared emitter on the TV and the infrared receiver on the 3D glasses.
  • Page 7 LC-90Y8T Part names and functions TV (rear view) (continued) The HDMI 2 and 電腦 terminals can both use the same audio input terminal (聲音輸入 (HDMI 2/電腦) (AUDIO IN) (HDMI 2/PC)). However, the proper item must be selected in the “Audio select” menu WARNING •...

  • Page 8: Remote Control Unit

    LC-90Y8T Part names and functions Remote control unit Select between 3D and 2D image viewing . a/b/c/d (Cursor) Select a desired item on the setting screen. ? (ENTER) Execute a command. 10 退出 (B Turn off the On-Screen Display .

  • Page 9: Attaching The Stand

    LC-90Y8T Preparation Attaching the Stand • Before attaching (or detaching) the stand, unplug the AC cord. • Before performing work spread cushioning over the base area to lay the TV on. This will prevent it from being damaged. CAUTION • Be sure to follow the instructions. Incorrect installation of the stand may result in the TV falling over.

  • Page 10: Chapter 3. Dimensions Dimensions

    LC-90Y8T CHAPTER 3. DIMENSIONS [1] DIMENSIONS Dimensional drawings 2054 1992.96 Active area Thinnest part (except of terminal height) NOTE • Dimensions do not include protrusions such as screws and some parts. 3 – 1...

  • Page 11: Chapter 4. Removing Of Major Parts

    LC-90Y8T CHAPTER 4. REMOVING MAJOR PARTS [1] REMOVING MAJOR PARTS 1. Removing of Stand Unit and Rear Cabinet Ass’y. 1. Remove the 4 lock screws (1) and detach the Stand Unit (2). 2. Remove the 3 lock screws (3), 20 lock screws (4), 10 lock screws (5) and detach the Rear Cabinet (L) Ass’y (6), Rear Cabinet (R) Ass’y (7).

  • Page 12: Main Unit

    LC-90Y8T 2. 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 Speaker (L) (2), Speaker (R) (3). 3. Disconnect the RC wire. 4. Detach the KEY Unit Ass’y (4).
  • Page 13 LC-90Y8T 3. Removing of Connectors, 90” LCD Panel Module Unit Ass’y. 1. Disconnect the following connectors from the MAIN Unit. (LV, PD) 2. Disconnect the following connectors from the POWER/DRIVE Unit. (L1, L2, PD) 3. Disconnect the following connectors from the LCD Control Unit. (PL, LV) 4.
  • Page 14 LC-90Y8T 5. Removing of R/C LED Unit, EMBLEM Unit, 3D IR Unit. 1. Detach the R/C LED Unit (1). Disconnect the RA wire. 3. Detach the EMBLEM Unit (2). 4. Disconnect the CI wire. 5. Detach 3D IR Unit (3).

  • Page 15: The Location Putting On The Heat Measure Sheet

    LC-90Y8T [2] The location putting on the heat mea- sure sheet [2] The location putting on the heat measure sheet 1. MAIN PWB Unit PSPAZC871WJKZ 2. LCD Control Unit PSPAZC854WJKZ 4 – 5...

  • Page 16: Precautions For Assembly

    LC-90Y8T [3] Precaution for assembly [3] Precautions for assembly 1. Points to be checked and precautions when servicing the unit Mount the main PWB Ass’y on the backlight chassis and check that the EMI-prevention parts are not peeled and twisted from the access holes. (The EMI-prevention parts, conductive nonwoven fabric gaskets, must be seen from the access holes.)
  • Page 17 LC-90Y8T The following is a drawing mounting the main PWB Ass’y on the backlight chassis. (The parts indicated by -> are the access holes for confirmation.) (Main PWB Ass’y => State where the shielded case and RF terminal angle are mounted on the main PWB)

  • Page 18: Adjustment Procedure

    LC-90Y8T CHAPTER 5. ADJUSTMENT [1] ADJUSTMENT PROCEDURE [1] ADJUSTMENT PROCEDURE Main unit supplied as service unit was adjusted on some item. However, W/B adj is not finished because it needs to be done by final set condition. So the main unit is in the adjustment condition when it is supplied and K mark is shown up in display when you use it.
  • Page 19 LC-90Y8T 2.2.3 How to upgrade the software 1. Unplug the AC cord. 2. Insert the USB Memory for version upgrade into USB1. 3. Plug in the AC cord with power button pressed down. 4. After 5 seconds, unpress the power button.
  • Page 20 LC-90Y8T 2.3. Monitor microprocessor software version upgrade Create the USB memory for monitor microprocessor software version upgrade in the same manner as explained in the “Main software version upgrade”. Copy the file X I A N _Y8T_xxx.USB and XIANSUBxxx.SMB. (named temporarily) for monitor microprocessor software version upgrade to the USB memory.
  • Page 21 LC-90Y8T 3. Entering and exiting the adjustment process mode 1) Before entering the adjustment process mode, the AV position RESET in the video adjustment menu. 2) While holding down the “VOL(-)” and “INPUT” keys at a time, plug in the AC cord of the main unit to turn on the power.
  • Page 22 LC-90Y8T 5. List of adjustment process mode menu The character string in brackets [ ] will appear as a page title in the adjustment process menu header. e t I i r c i t p , l i ) . c...
  • Page 23 LC-90Y8T , l i 4/19 INSPECT USB TERM PORT ALL : - - - - - - Reading inspection of USB memory terminal MONIDATA READ [TEMP/OPC] MONITOR Temperature/OPC Acquisition tool. 5/19 6/19 7/19 8/19 9/19 10/19 11/19 MONITOR EEP READ/WRITE...
  • Page 24 LC-90Y8T , l i 13/19 T-CON VERSION EXT.1 T-CON VERSION EXT.2 T-CON VERSION EXT.3 T-CON VERSION EXT.4 14/19 3D HDMI FPGA Version 2D 3D FPGA Version 15/19 CROSS TALK TH1 CROSS TALK TH2 CROSS TALK TH3 CROSS TALK TH4 CROSS TALK GAIN1...

  • Page 25: Special Features

    LC-90Y8T 6. Special features STANDBY CAUSE (Page 1/19) Display of a cause (code) of the last standby The cause of the last standby is recorded in EEPROM whenever possible. Checking this code will be useful in finding a problem when you repair the troubled set.
  • Page 26 LC-90Y8T Communication Error H Regular communication Time-out e l u r o r r o r o r r i n o r o t r o r Power supply Error1 PS_ON(AC_DET) Error Power supply Error 2 D_POW(DET_13V) Error Power supply Error 3...
  • Page 27 LC-90Y8T 10) VIDEO SIGNAL ADJUSTMENT PROCEDURE (1) Equipment confirmation Before adjustment, need to confirm that Adjustment equipment and signal generator have set to SHARP LCD US used. Confirmation of signal from generator (setting to spec level) Composite signal (NTSC) 0.714Vp-p 0.02Vp-p (pedestal to white level)
  • Page 28 LC-90Y8T 10.3 TUNER Signal Adjustment Setting [Signal] Feed the Internal signal (NTSC colour bar US-10CH) NTSC split color tuner RF. Picture level and Sync Level 7:3 [RFCH US-10] Internal UV [Terminal] TUNER White 100% Auto Adjustment Test Mode page At the related page, move cursor to [TUNER ADJ], press OK.
  • Page 29 LC-90Y8T 11) WHITE BALANCE ADJUSTMENT / GAMMA ADJUSTMENT (1) White Balance Adjustment / Gamma Adjustment Brightness MAX (+16) Regarding the details of white balance adjustment procedure, 1 Setting AV MODE: DYNAMIC refer to white balance adjustment spec for “Kameyama model Active Backlight: off version 1.9”.
  • Page 30 LC-90Y8T (i) Y 248cd/m Proceed to next step #5. Point 6 WB6-SR3 LEV60232 (ii) Y < 248cd/m WB6-SR3 GCC6**** a) B6 Proceed to next step #5. MG6G**** MG6B**** b) B6 = MG6R**** The parameter GAIN is calculated from equation (a).
  • Page 31 LC-90Y8T [ Panel SPEC ] MIN Point *R1LK900D3GW10V (B3KUV740X) 5000 1 GCP00000 GCC0**** 12. Write the value of gamma adjustment by inputting command “GCST0001”. Gamma adj. value data input 13. Measure the luminance after all adjustment. GCST0001 *Initial value of RGB at Point 6 = “928”...
  • Page 32 LC-90Y8T 12) KEY DATA INPUT 12.1) EDID DATA INPUT ( Main PWB : QPWBXG216WJ**) HDMI EDID Inspection mode Enter the Adjustment Mode. INPUT ANALOG RGB Confirm the file Move cursor at [HDMI EDID WRITE] and press [ENT] key. EDID INPUT name/version.

  • Page 33: Public Mode Setting Procedure

    LC-90Y8T [2] PUBLIC MODE SETTING PROCEDURE [2] PUBLIC MODE SETTING PROCEDURE 1. How to start Public Mode Starting the Public Mode • There is one following ways to display the PUBLIC Mode setting screen. 1) Method of needing password a) Press the "INPUT" and "VOL (+)" keys on the set at once and turn on the power.
  • Page 34 LC-90Y8T 4. Public Mode Menu The guidance is not displayed on screen. Setup procedure To move the cursor up and down, use the “cursor UP/DOWN” key (remote controller) and “CH ( )” key (remote controller and set). To change the settings, use the “cursor RIGHT/LEFT” key (remote controller) and “VOL (+)/(–)” key (remote controller and set).
  • Page 35 LC-90Y8T 5. On Setting Items 1) Power ON fixed [POWER ON FIXED] Option “VARIABLE”, “FIXED_ALL”, “FIXED_BODYKEY” or “RCRESPOND” (loop enabled) Default “VARIABLE” Function • VARIABLE : “POWER/RECEPTION” key on TV unit or remote control is enabled. • FIXED_ALL : “POWER/RECEPTION” key on TV unit or remote control is disabled.
  • Page 36 LC-90Y8T 4) Volume fixed [VOLUME FIXED] Option “VARIABLE”, “FIXED”, “ACCTRL” or “AC/RCCTRL” (loop enabled) Default “VARIABLE” Function • VARIABLE : The volume is not fixed. • FIXED : The volume is fixed to the value adjusted in the volume fixed level.
  • Page 37 LC-90Y8T 8) Menu operation [MENU BUTTON] Option “RESPOND” or “NO RESPOND” (loop enabled) Default “RESPOND” Function The MENU key on the main unit and remote control is decided whether it is enabled or disabled. Exception • RESPOND : The manu key is enabled.
  • Page 38 LC-90Y8T 11) Start mode [INPUT MODE START] Option “NORMAL” or “Input source 1 (input selection or channel)” ... (loop enabled) Default “NORMAL” Function Which kinds of input source or channel is decided when the power turning on. NORMAL : The content of the last memory is followed.
  • Page 39 LC-90Y8T 15) 232C power ON control [232C POWON] Option “ENABLE” or “DISABLE” (loop enabled) Default DISABLE Function The item decide whether Power ON by the 232C command is enabled/disabled in the standby state. The same function as 232C command “RSPW”.

  • Page 40: Usb Clone Specification

    LC-90Y8T [3] USB Clone Specifications [3] USB Clone Specifications Input “369” as password on the copy mode screen using the same input method as Public Mode on the previous page. 1. Screen Specifications (copy mode <TV USB>) • TV USB (sucking from TV) <FIG 1>...
  • Page 41 LC-90Y8T 3. USB Clone Restrictions • Be sure to set the network setting (Setup/View setting/Network setup) after writing the data by USB Clone (USB TV). • Use USB memory with a memory capacity of 1M byte or greater. • The USB memory file system is FAT (FAT32).

  • Page 42: Failure Diagnosis By Led In Front Of Cabinet

    LC-90Y8T CHAPTER 6. TROUBLESHOOTING [1] Failure diagnosis by LED in front of cab- inet [1] Failure diagnosis by LED in front of cabinet START Is the Center Icon flashing? Check "[2] LED flashing specification at the time of an error (Center icon LED used)".
  • Page 43 LC-90Y8T Table 1. Concrete flashing pattern Detail display Item Cause Slow flashing Fast flashing Inverter/Lamp system failure Flashes once Flashes once Lamp error Power PWB Flashes twice Flash once Power supply error 2 (*2) AC_DET error failure Flash twice Power supply error 2 (*2) UR+13V error (Power failure, etc.)
  • Page 44 LC-90Y8T [2] LED flashing specifications at the time of an error ( Center icon LED USED ) 3. New method LED flashing timing chart at the time of an error 1) Inverter/Lamp failure details (Flashes slowly once and flashes fast)
  • Page 45 LC-90Y8T 4) Other failure details (Flashes slowly 4 times and flashes fast) Note Pins are monitor microprocessor pins unless other- i t a wise specified. Monitor temperature H: On If the panel temperature is 60 C or more for 15 seconds...

  • Page 46: Troubleshooting Table

    LC-90Y8T [3] TROUBLESHOOTING TABLE [1] TROUBLESHOOTING TABLE The sound is not emitted from the Speaker & Woofer though the picture has come out. No sound output in all modes? Do audio signals output from pins of IC3301 (Digital AV decode & Main CPU) ? Check IC3301 and its peripheral circuits.
  • Page 47 LC-90Y8T No sound (during the reception of TV(ANALOG) broadcasting) Does not the sound go out though the picture has come out when UHF/VHF is received? o r f s t i p i r l a r r i c .
  • Page 48 LC-90Y8T No sound from external input devices (1) Does not the sound of the audio signal input to EXT 2 go out? Do audio signals input to pins[7/CVBS1_IN_R, 8/CVBS1_IN_L] of EXT2(J510)? Check the setting of an external input device that con- Is CVBS_PLUG [9/CVBS1_PLUG] of J510 at "L"...
  • Page 49 LC-90Y8T No sound from external input devices (3) Does not the sound of the audio signal input to HDMI-2 mode go out? Does not the sound of the audio signal input to PC/Component mode go out? Check whether it is selected "HDMI+Analog" by the Audio select Check whether it is selected "Video+Audio"...
  • Page 50 LC-90Y8T No sound from external output device (5) No sound from HEAD PHONE_OUTPUT/ AUDIO_OUTPUT terminal. Does not the sound of the audio signal output to Headphone mode go Does not the sound of the audio signal output to Audio out mode go...
  • Page 51 LC-90Y8T No sound from external output device (7) Does not the sound of the audio signal output to HDMI1 go out? Does audio signal output from pin[14] of SC1501 (HDMI1 terminal) ? Check SC1501 and peripheral circuits. Does audio signal output from pin[39/HECP] of IC2601(HDMI-SW) ? Check the line between IC2601 and SC1501.
  • Page 52 LC-90Y8T No picture on the display (2) Does not the picture come out when VHF/UHF is received? Does video signal (CVBS) output from pin[9] of TUNER(TU1135) ? Check the tuner and its peripheral circuits. Replace as required. Does video signal (TUNER_CVBS) input to pin [AN29/ Check the line between TU1103 and IC3301.
  • Page 53 LC-90Y8T [External input EXT2] No picture on the display (5) Does not the picture of the CVBS signal input to EXT2 go out? Does CVBS signal input to pin[10] of EXT2 (J510) ? Check the setting of an external input device that connects with Is CVBS_PLUG [9/CVBS1_PLUG] of J510 at "L"...
  • Page 54 LC-90Y8T [External input HDMI-1/2/3/4] No picture on the display (8) Does not the picture/sound of the HDMI signal input to HDMI-1/2/3/4 go out? Is the Hot plug detection function output from pin [19] of the HDMI- Check the line between SC1501 and pin[59] of IC2601(HDMI- 1(SC1501) normal ? SW).
  • Page 55 LC-90Y8T [External input Network] No picture on the display Does not the signal input to Network go out? Does the signal in/output to pins(1),(2),(3),(6) of LAN-jack Check the interface device and peripheral circuits. (J9401)? (power-LED of hub, LINK-LED of hub) Do signals in/output to pins of IC3301 (Digital AV decode &...
  • Page 56 LC-90Y8T No light (Back Light doesn't light) Is the AC cord connector tightly connected to the set? Reconnect the AC cord tightly and turn on the power again. Are the wire harnesses and other cables properly connected in Reconnect the wire harnesses and other cables properly in the set.

  • Page 57: Chapter 7. Major Ic Informations

    LC-90Y8T CHAPTER 7. MAJOR IC INFORMA- TIONS [1] MAJOR IC INFORMATIONS [1] MAJOR IC INFORMATIONS 1. MAJOR IC INFORMATIONS 1.1. IC2601 (VHiSii9387A-1Q) This IC is 5 input and 1 output HDMI port processor. The TMDS cores run at 2.25Gbps. (Supports video resolutions up to 1080p, 60Hz, 12bit.) The adaptive equalizer provides long cable support.

  • Page 58: Overall Wiring Diagram

    LC-90Y8T CHAPTER 8. OVERALL WIRING SYSTEM BLOCK DIAGRAM [1] OVERALL WIRING DIAGRAM 8 – 1...
  • Page 59 LC-90Y8T [2] SYSTEM BLOCK DIAGRAM 8 – 2...

  • Page 60: Parts Guide

    LC-90Y8T PartsGuide PARTS GUIDE No. SY3M38LC-90Y8T LCD COLOUR TELEVISION LC-90Y8T MODEL: CONTENTS PRINTED WIRING BOARD SUPPLIED ACCESSORIES / ASSEMBLIES PACKING PARTS ( NOT REPLACE- MENT ITEM ) LCD PANEL SERVICE JIGS (USE FOR SERVIC- ING) CABINET AND MECHANICAL PARTS Parts marked with "...
  • Page 61 LC-90Y8T PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [1] PRINTED WIRING BOARD ASSEMBLIES Main Unit DKEYMG216FMG5 POWER Unit RUNTKB096WJQZ EMBLEM DUNTKG014FMF7 RC Unit DUNTKG015FMF7 3D IR Unit DUNTKG017FMF7 DUNTKF800FMF8 KEY Unit [2] LCD PANEL MODULE ASSY B3KUV740X LCD PANEL...
  • Page 62 LC-90Y8T [3] CABINET AND MECHANICAL PARTS Unit 25-3 25-2 25-1 MAIN Unit 25-1 25-4 12-3 12-2 12-1 60-1 60-2 59-2 59-1 90" LCD Panel Module Unit 1-14 1-14 1-14 R/C LED Unit 1-14 1-14 1-15 1-14 1-14 POWER/DRIVE 1-11 KM RA...
  • Page 63 LC-90Y8T PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [3] CABINET AND MECHANICAL PARTS Decoration Frame Assembly Not Available Corner Angle Ass'embly , x4 CANGKD590WJ31 Decoration Frame (Low) Ass'y CDECEA044WJ31 Under R Grill Ass'y CGRL-A013WJ32 Decoration Frame (Upper) HDECEA043WJ3A Decoration Frame ( R )
  • Page 64 LC-90Y8T [4] SUPPLIED ACCESSORIES / PACKING PARTS ( NOT REPLACEMENT ITEM ) X9 “AAA”size battery X6 LAN USB adapter (WN8522D 7-JU )(1pcs ) X7 Remote control unit X5 3D Glasses (2pcs) Other accessories • X 8 Operation manual Stand Base Ass'y •...
  • Page 65 LC-90Y8T PRICE PART PARTS CODE DESCRIPTION RANK MARK RANK [4] SUPPLIED ACCESSORIES / PACKING PARTS ( NOT REPLACEMENT ITEM ) Stand Base Ass'y CDAI-A806WJ34 Support Ass'y,x2 CANGKD276WJ07 Stand Screw Ass'y CSAKHA050WE05 AC Cord QACCZA204WJPZ 3D Glasses x2 KOPTLA010WJN1 Wi-Fi Dongle x1...
  • Page 66 LC-90Y8T...
  • Page 67 EndPage COPYRIGHT 2013 BY SHARP CORPORATION © COPYRIGHT XXXX BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, ©...

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