Sharp LC-32L400M Service Manual
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Sharp LC-32L400M Service Manual

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TopPage
PRECAUTION............................................................ i
PRECAUTIONS FOR USING LEAD-FREE
SOLDER ................................................................... ii
Major Service Parts ........................................iii
[1]
SPECIFICATIONS .................................................1-1
[1]
Operation Manual ..........................................2-1
CHAPTER 3. DIMENSIONS
[1]
DIMENSIONS ........................................................3-1
[1]
REMOVING OF MAJOR PARTS ...........................4-1
[1]
Adjustment Procedure ...............................5-1
CHAPTER 6. TROUBLESHOOTING TABLE
[1]
TROUBLESHOOTING TABLE...............................6-1
[1]
Overall Wiring Diagram ..............................7-1
[2]
System Block Diagram .................................7-2
CHAPTER 8. PRINTED WIRING BOARD ASSEMBLIES
[1]
Main Unit...............................................................8-1
[2]
Power Sub Unit..................................................8-3
[3]
R/C, Led Unit.........................................................8-5
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

MODEL
In the interests of user-safety (Required by safety regulations in some countries) the set should
be restored to its original condition and only parts identical to those specified should be used.
CONTENTS
No. S40F6LC32L40M
LCD COLOUR TELEVISION
LC-32L400M
[1]
[2]
MAIN Unit...............................................................9-2
[3]
POWER SUB Unit................................................9-12
[4]
R/C, LED Unit.......................................................9-16
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
LC-32L400M

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Ben
May 8, 2025

It does not light when powered on the screen stays blank

0
1 comments:
Mr. Anderson
May 19, 2025

A blank screen on a Sharp LC-32L400M when powered on could be caused by a faulty power supply board, a defective backlight, a malfunctioning main board, or a damaged T-Con board. If the TV has sound but no picture, the issue is likely with the backlight or T-Con board. If there is no sound or picture, the power supply or main board may be the cause.

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Summary of Contents for Sharp LC-32L400M

  • Page 1: Service Manual

    TopPage LC-32L400M SERVICE MANUAL No. S40F6LC32L40M LCD COLOUR TELEVISION LC-32L400M MODEL In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

  • Page 2: Safety Precaution

    LC-32L400M LC-32L400M SAFETY PRECAUTION Service Manual 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 All checks must be repeated with the AC cord plug connection reversed.
  • Page 3 LC-32L400M 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 of lead-free solder.
  • Page 4 LC-32L400M LC-32L400M OUTLINE Service Manual MAJOR SERVICE PARTS PWB UNIT Ref No. Part No. Description DUNTKF537FM02 MAIN Unit DUNTKF538FM02 POWER SUB Unit DUNTKF539FM02 R/C, LED Unit RDENC2590TPZZ INVERTER Unit OTHER UNIT Ref No. Part No. Description B3KU32L50 32” LCD Panel Module (R1LK315T3LA5BX) IC FOR EXCLUSIVE USE OF THE SERVICE Ref No.

  • Page 5: Specifications

    0°C _ 40°C Operating Temperature As a part of 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 LC-32L400M CHAPTER 2. LC-32L400M OPERATION MANUAL Service Manual [1] OPERATION MANUAL Part names TV (Front) Remote control sensor OPC sensor POWER indicator Light off Power off Lighted (Red) The TV is in standby mode. Lighted (Green) The TV is on.

  • Page 7: Inserting The Battery

    LC-32L400M Remote control unit 7 EXIT Return to the default screen. 8 Colour (Red/Green/Yellow/Blue) TELETEXT mode: Select a page. 9 POWER (STANDBY/ON) To switch the power on and off. 10 DISPLAY Display the channel or input information. 11 SLEEP Set the Sleep timer.
  • Page 8 LC-32L400M Attaching the stand Before attaching (or detaching) the stand, unplug the AC cord from the AC outlet. Before performing work spread cushioning over the base area to lay the TV on. This will prevent it from being damaged. Confirm the screws supplied with the TV.
  • Page 9 LC-32L400M CHAPTER 3. LC-32L400M DIMENSIONS Service Manual [1] DIMENSIONS Unit: mm 3 – 1...
  • Page 10 LC-32L400M CHAPTER 4. LC-32L400M REMOVING OF MAJOR PARTS Service Manual [1] REMOVING OF MAJOR PARTS 1. Removing of the Stand and Back Cover 1. Detach the Stand Hinge Cover [1]. 2. Remove the 4 lock screws [2] and detach the Stand.
  • Page 11 LC-32L400M 2. Disconnect the connectors 1. Disconnect the connectors from the MAIN Unit, POWER SUB Unit [1]. MAIN Unit POWER SUB Unit 4 – 2...

  • Page 12: Power Sub Unit

    LC-32L400M 3. Removing of the MAIN Unit and POWER SUB Unit 1. Remove the 2 lock shafts [1], 2 lock shafts [2], 2 lock screws [3] and detach the MAIN Unit. 2. Remove the 5 lock screws [4] and detach the POWER SUB Unit.

  • Page 13: Rear Cabinet

    LC-32L400M 4. Removing of the Rear Cabinet 1. Remove the 7 lock screws [1] and detach the Rear Cabinet. Rear Cabinet 4 – 4...

  • Page 14: R/C, Led Unit

    LC-32L400M 5. Removing of the Speaker and R/C, LED Unit 1. Disconnect the connectors from the INVERTER Unit and LCD Panel Module [1]. 2. Disconnect SP connectors [2]. Remove the 4 lock screws [3] and detach the Speaker, remove the 2 Molt Plane [3a].
  • Page 15 LC-32L400M 6. Removing of the Top Bracket, Bottom Bracket and LCD Panel Module 1. Remove the 4 lock screws [1]. 2. Remove the 4 lock screws [2] and detach the Top Bracket, Bottom Bracket. 3. Remove the 2 lock screws [3] and detach the LCD Panel Module.
  • Page 16 LC-32L400M CHAPTER 5. LC-32L400M ADJUSTMENT Service Manual [1] ADJUSTMENT PROCEDURE 1. Entering and cancel the adjustment process mode While holding down the TV/VIDEO and Volume DOWN keys at the same time, plug in the AC cord to turn on the power. (“K123” standing for inspection process mode is displayed on the middle right section of the screen.)
  • Page 17 LC-32L400M 3.1.3 Component 33K 60Hz signal adjustment (COMP-HD) Adjustment item Adjustment conditions Adjustment procedure Adjustment [Signal] Feed the COMPONENT 33K 60Hz (1080i) 100% Full-field Colour Bar signal (100% COMP 33K 60Hz (1080i) colour saturation) to INPUT 4 COMPONENT terminal. 100% Full-field Colour Bar...
  • Page 18 LC-32L400M 3.2. White balance adjustment Adjustment item Adjustment conditions Adjustment procedure Adjustment Brightness : MAX For the details of white balance adjustment procedure, please refer to white balance adjustment spec for current model. Set the luminance meter on the center of the screen 1) Confirm the set condition.
  • Page 19 LC-32L400M 5. Software upgrading 1) Plug off the LCD TV. 2) Insert the USB device to the USB terminal at the LCD TV. (Make sure that latest software is installed in the USB device) 3) Hold the LCD TV power key and plug on the LCD TV.
  • Page 20 LC-32L400M CHAPTER 6. LC-32L400M TROUBLESHOOTING TABLE Service Manual [1] TROUBLESHOOTING TABLE No power (front LED failure to light up) or no startup (front LED failure to turn from red to green) Is the AC cord connector tightly connected to the set? Reconnect the AC cord tightly and turn on the power again.
  • Page 21 LC-32L400M With [RF] signal input No video onscreen (1) No video in the UHF/VHF reception Is there IF output from the tuner pin(12) of TU1101 as specified? Check TU1101 and its peripheral circuits. Is there VIF input at pin 57 & 58 of IC3301? Check the circuit between TU1101 &...
  • Page 22 LC-32L400M With <Video> signal input No video onscreen (3) No external input video onscreen <INPUT 3> Is INPUT 3 selected on the input select menu screen? Select INPUT 3 on the input select menu screen to pick up the right input signal.
  • Page 23 LC-32L400M With <Component> signal input No video onscreen (5) No external input video onscreen <INPUT 4> Is INPUT 4 selected on the input select menu screen? Select INPUT 4 on the input select menu screen to pick up the right input signal.
  • Page 24 LC-32L400M No audio heard (1) No sound in the UHF/VHF reception. Is the IF output from the tuner pin (12) of TU1101 as specified? Check TU1101 and its peripheral circuits. Is there the I2S signal input at pins (180), (181) of IC3301? Check IC3301 and its peripheral circuits.
  • Page 25 LC-32L400M No audio heard (2) No external audio heard <INPUT 2> Is there the L-ch audio signal input from pin (5) of input terminal J5510 to pin (77) of IC3301? Is there the R-ch audio signal input from pin (7) of input terminal J5510 to pin (78) of IC3301? <INPUT 3>...
  • Page 26 LC-32L400M No audio heard (3) No HDMI sound heard. <INPUT 1> (*INPUT 1 is digital audio.) Does the HDMI image appear onscreen? Refer to “<INPUT 1> in No external input video onscreen (HDMI)”. No audio output from INPUT 1. Check the EDID.
  • Page 27 LC-32L400M No audio heard (4) No sound from the HDMI sound input terminal. (INPUT 1 analog audio) Is there the L-ch audio signal input from pin (2) of external input terminal J506 (HDMI AUDIO IN) to pin (70) of IC3301?
  • Page 28 LC-32L400M No audio heard (5) No PC audio output Pin (2) of J506: Is L-ch input into the pin (70) of IC3301? Pin (3) of J506: Is R-ch input into the pin (71) of IC3301? Are I2S signal output from the pins (180), (181) of IC3301 normally? Check peripheral circuits of IC3301.

  • Page 29: Chapter 7. Overall Wiring/Block Diagram 1] Overall Wiring Diagram

    LC-32L400M LC-32L400M CHAPTER 7. OVERALL WIRING/BLOCK DIAGRAM Service Manual [1] OVERALL WIRING DIAGRAM 7 – 1...

  • Page 30: System Block Diagram

    LC-32L400M [2] SYSTEM BLOCK DIAGRAM 7 – 2...
  • Page 31 LC-32L400M LC-32L400M CHAPTER 8. PRINTED WIRING BOARD ASSEMBLIES Service Manual [1] MAIN Unit MAIN Unit (Side-A) 8 – 1...
  • Page 32 LC-32L400M MAIN Unit (Side-B) 8 – 2...
  • Page 33 LC-32L400M [2] POWER SUB Unit POWER SUB Unit (Side-A) 8 – 3...
  • Page 34 LC-32L400M POWER SUB Unit (Side-B) 8 – 4...
  • Page 35 LC-32L400M [3] R/C, LED Unit R/C, LED Unit (Side-A) R/C, LED Unit (Side-B) 8 – 5...

  • Page 36: Chapter 9. Schematic Diagram 1] Description Of Schematic Diagram

    LC-32L400M LC-32L400M CHAPTER 9. SCHEMATIC DIAGRAM Service Manual [1] DESCRIPTION OF SCHEMATIC DIAGRAM 1. VOLTAGE MEASUREMENT CONDITION: 1) The voltages at test points are measured on exclusive AC adaptor and the stable supply voltage of AC 110-240V. Signals are fed by a color bar signal gen- erator for servicing purpose and the above voltages are measured with a 20k ohm/V tester.

  • Page 37: Main Unit

    LC-32L400M [2] MAIN Unit • MAIN Unit-1/14 9 – 2...
  • Page 38 LC-32L400M • MAIN Unit-2/14 9 – 3...
  • Page 39 LC-32L400M • MAIN Unit-3/14 9 – 4...
  • Page 40 LC-32L400M • MAIN Unit-4/14 9 – 5...
  • Page 41 LC-32L400M • MAIN Unit-5/14 9 – 6...
  • Page 42 LC-32L400M • MAIN Unit-6/14 (*On this model, the MAIN Circuit Basic Diagram 7/14 is not applied.) 9 – 7...
  • Page 43 LC-32L400M • MAIN Unit-8/14 9 – 8...
  • Page 44 LC-32L400M • MAIN Unit-9/14 9 – 9...
  • Page 45 LC-32L400M • MAIN Unit-10/14 (*On this model, the MAIN Circuit Basic Diagram 11/14, 12/14, 13/14 is not applied.) 9 – 10...
  • Page 46 LC-32L400M • MAIN Unit-14/14 9 – 11...
  • Page 47 LC-32L400M [3] POWER SUB Unit • POWER SUB Unit-1/4 9 – 12...
  • Page 48 LC-32L400M • POWER SUB Unit-2/4 9 – 13...
  • Page 49 LC-32L400M • POWER SUB Unit-3/4 9 – 14...
  • Page 50 LC-32L400M • POWER SUB Unit-4/4 9 – 15...
  • Page 51 LC-32L400M [4] R/C, LED Unit 9 – 16...
  • Page 52 LC-32L400M 9 – 17...
  • Page 53 LC-32L400M PartsGuide PARTS GUIDE No. S40F6LC32L40M LCD COLOUR TELEVISION LC-32L400M MODEL Note: The reference numbers on the PWB are arranged in alphabetical order. CONTENTS CABINET AND MECHANICAL PARTS PRINTED WIRING BOARD ASSEMBLIES LCD MODULE Assembly LCD PANEL SUPPLIED ACCESSORIES DUNTKF537FM02 (MAIN Unit)
  • Page 54 LC-32L400M PRICE PARTS CODE PART DESCRIPTION RANK MARK DELIVERY [1] PRINTED WIRING BOARD ASSEMBLIES MAIN Unit DUNTKF537FM02 POWER SUB Unit DUNTKF538FM02 R/C, LED Unit DUNTKF539FM02 INVERTER Unit RDENC2590TPZZ [2] LCD PANEL 32"LCD Panel Module (R1LK315T3LA5BX) B3KU32L50 [3] DUNTKF537FM02 (MAIN Unit)
  • Page 55 LC-32L400M PRICE PARTS CODE PART DESCRIPTION RANK MARK DELIVERY [3] DUNTKF537FM02 (MAIN Unit) C3314 Capacitor, 220p 50V Ceramic VCKYCZ1HB221KY C3315 Capacitor, 0.047 10V Ceramic VCKYCZ1AB473KY C3316 Capacitor, 220p 50V Ceramic VCKYCZ1HB221KY C3317 Capacitor, 0.047 10V Ceramic VCKYCZ1AB473KY C3318 Capacitor, 0.047 10V Ceramic...
  • Page 56 LC-32L400M PRICE PARTS CODE PART DESCRIPTION RANK MARK DELIVERY [3] DUNTKF537FM02 (MAIN Unit) C9652 Capacitor RC-KZA383WJZZY C9653 Capacitor, 0.01 25V Ceramic VCKYCZ1EB103KY C9654 Capacitor, 6800p 50V Ceramic VCKYCY1HB682KY C9656 Capacitor RC-KZA616WJQZY C9657 Capacitor RC-KZA616WJQZY C9658 VCKYCZ1CB333KY Capacitor, 0.033 16V Ceramic C9659 Capacitor, 0.01 25V Ceramic...
  • Page 57 LC-32L400M PRICE PARTS CODE PART DESCRIPTION RANK MARK DELIVERY [3] DUNTKF537FM02 (MAIN Unit) P2701 Plug QPLGNA160WJZZY P3301 Plug QPLGNA327WJZZY Q501 Transistor, HN7G04FU-A(TE85L,F VSHN7G04FUA-1Y Q1101 Transistor, 2SC2735JC21TL VS2SC2735//1EY Q1103 Transistor, RT1N441U-T111-1 VSRT1N441U/-1Y Q1104 VSRT1N441U/-1Y Transistor, RT1N441U-T111-1 Q1105 Transistor, RT1N441U-T111-1 VSRT1N441U/-1Y Q1501...
  • Page 58 LC-32L400M PRICE PARTS CODE PART DESCRIPTION RANK MARK DELIVERY [3] DUNTKF537FM02 (MAIN Unit) R2704 Resistor, 27k 1/16W Metal Oxide VRS-CZ1JF273FY R2705 Resistor, 68k 1/16W Metal Oxide VRS-CZ1JF683FY R2707 Resistor, 22k 1/16W Metal Oxide VRS-CZ1JF223FY R2712 Resistor, 0 1/16W Metal Oxide...
  • Page 59 LC-32L400M PRICE PARTS CODE PART DESCRIPTION RANK MARK DELIVERY [3] DUNTKF537FM02 (MAIN Unit) R3520 Resistor, 100 1/16W Metal Oxide VRS-CG1JF101JY R3521 Resistor, 100 1/16W Metal Oxide VRS-CG1JF101JY R3522 Resistor, 100 1/16W Metal Oxide VRS-CG1JF101JY R3523 Resistor, 100 1/16W Metal Oxide...
  • Page 60 LC-32L400M PRICE PARTS CODE PART DESCRIPTION RANK MARK DELIVERY [4] DUNTKF538FM02 (POWER SUB Unit) C7312 Capacitor, 1 50V Electrolytic VCEA0A1HW105M+ C7313 Capacitor, 4.7 50V Electrolytic VCEA0A1HW475M+ C7314 Capacitor, 0.1 25V Ceramic VCKYCY1EB104KY C7318 Capacitor, 1000p 500V Ceramic VCKYPA2HB102K+ C7319 Capacitor, 1000p 500V Ceramic...
  • Page 61 LC-32L400M PRICE PARTS CODE PART DESCRIPTION RANK MARK DELIVERY [4] DUNTKF538FM02 (POWER SUB Unit) R5532 Resistor, 18k 1/16W Metal Oxide VRS-CY1JF183JY R5535 Resistor, 18k 1/16W Metal Oxide VRS-CY1JF183JY R5537 Resistor, 75 1/4W Metal Oxide VRS-TQ2EF750JY R5538 Resistor, 12k 1/16W Metal Oxide...
  • Page 62 LC-32L400M PRICE PARTS CODE PART DESCRIPTION RANK MARK DELIVERY [5] DUNTKF539FM02 (R/C, LED Unit) C104 Capacitor RC-KZA616WJQZY C105 Capacitor, 0.01 50V Ceramic VCKYCY1HF103ZY C107 Capacitor RC-KZA237WJZZY C108 Capacitor RC-KZA237WJZZY D102 Diode RH-PXA193WJQZY D103 RH-PXA194WJQZY Diode IC101 IC, GA1A1S100WP VHIGA1S100W-1Y P101...
  • Page 63 LC-32L400M [6] CABINET AND MECHANICAL PARTS 1-12 1-11 1-12 1-10 R/C, LED Unit 2-11 MAIN Unit 2-10 POWER SUB Unit 2-12 2-12 LCD Panel Module...
  • Page 64 LC-32L400M PRICE PARTS CODE PART DESCRIPTION RANK MARK DELIVERY [6] CABINET AND MECHANICAL PARTS Front Cabinet Ass'y CCABAC556WJ01 Front Cabinet Not Available Shine Trim HDECQB454WJ4A LED Cover HDECQB455WJ4A Power Decoration HDECQB456WJ4A Speaker Sheet HPNLSA297WJ4A Spacer L, x3 PSPAHC274WJ00 Spacer S, x2...
  • Page 65 LC-32L400M PRICE PARTS CODE PART DESCRIPTION RANK MARK DELIVERY [6] CABINET AND MECHANICAL PARTS Spacer PSPAHC283WJ00...
  • Page 66 LC-32L400M [7] LCD MODULE Assembly...
  • Page 67 LC-32L400M PRICE PARTS CODE PART DESCRIPTION RANK MARK DELIVERY [7] LCD MODULE Assembly 32"LCD Panel Module (R1LK315T3LA5BX) B3KU32L50 Bezel Ass'y (Top) CANGK4434TP01 Bezel Ass'y (Bottom) CANGK4327TP01 Bezel Ass'y (L/R), x2 CANGK4328TP01 P Chassis Ass'y (Top) CHLDZ4113TP01 P Chassis Ass'y (Bottom)
  • Page 68 LC-32L400M [9] PACKING PARTS (NOT REPLACEMENT ITEM) PRICE PARTS CODE DESCRIPTION PART RANK MARK DELIVERY [9] PACKING PARTS (NOT REPLACEMENT ITEM) Packing Case SPAKCF646WJZZ Wrapping Paper SPAKPB511WJZZ SPAKPB514WJ4Z Mirror Mat Base Packing Add. (Top) SPAKXC971WJZZ Packing Add. (Bottom) SPAKXC972WJZZ Polyethylene Bag...
  • Page 69 LC-32L400M MEMO © COPYRIGHT XXXX BYSHARP 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, photocopying, recording, or otherwise, without prior written permission of the publisher.
  • Page 70 LC-32L400M COPYRIGHT 2010 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, photocopying, recording, or otherwise, without prior written permission of the publisher.

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