SHARP LC-42XL2E, LC-46XL2E, LC-46X20E, LC-52XL2E, LC-52X20E Service Manual

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LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

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SERVICE MANUAL

No.S87O7LC42XL2E

LCD COLOUR TELEVISION

LC-42XL2E/S/RU LC-46XL2E/S/RU LC-46X20E/S/RU

LC-42/46/52XL2E/S/RU LC-46/52X20E/S/RU

MODELS

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.

LC-52XL2E/S/RU LC-52X20E/S/RU

CONTENTS

SAFETY PRECAUTION

IMPORTANT SERVICE SAFETY

PRECAUTION...............................................

Precautions for using lead-free solder ..........

CHAPTER 1. OPERATION MANUAL

[1] SPECIFICATIONS

(LC-42/46/52XL2E/S/RU)..............................

[2] SPECIFICATIONS

(LC-46/52X20E/S/RU)...................................

[3] OPERATION MANUAL

(LC-42/46/52XL2E/S/RU)..............................

[4] OPERATION MANUAL

(LC-46/52X20E/S/RU)...................................

[5] DIMENSIONS (LC-42/46/52XL2E/S/RU)......

[6] DIMENSIONS (LC-46/52X20E/S/RU)...........

CHAPTER 2. REMOVING OF MAJOR PARTS

[1] REMOVING OF MAJOR PARTS

(LC-42XL2E/S/RU)........................................

[2] REMOVING OF MAJOR PARTS

(LC-46XL2E/S/RU)........................................

[3] REMOVING OF MAJOR PARTS

(LC-46X20E/S/RU)........................................

[4] REMOVING OF MAJOR PARTS

(LC-52XL2E/S/RU)........................................

[5] REMOVING OF MAJOR PARTS

(LC-52X20E/S/RU)........................................

CHAPTER 3. ADJUSTMENT PROCEDURE

[1] ADJUSTMENT PROCEDURE......................

CHAPTER 4. TROUBLESHOOTING TABLE

[1] TROUBLESHOOTING TABLE......................

.............. i

............. ii

..........1-1

..........1-2

..........1-3

..........1-8

........1-13

........1-14

..........2-1

........2-14

........2-26

........2-38

........2-50

..........3-1

..........4-1

CHAPTER 5. MAJOR IC INFORMATIONS

[1] MAJOR IC INFORMATIONS.........................

CHAPTER 6. BLOCK DIAGRAM/WIRING DIAGRAM

[1] SYSTEM BLOCK DIAGRAM ........................

[2] TERMINAL BLOCK DIAGRAM.....................

[3] MAIN BLOCK DIAGRAM ..............................

[4] POWER BLOCK DIAGRAM..........................

[5] WIRING DIAGRAM (LC-42XL2E/S/RU) .......

[6] WIRING DIAGRAM (LC-46XL2E/S/RU) .......

[7] WIRING DIAGRAM (LC-46X20E/S/RU) .......

[8] WIRING DIAGRAM (LC-52XL2E/S/RU) .......

[9] WIRING DIAGRAM (LC-52X20E/S/RU) .......

CHAPTER 7. PRINTED WIRING BOARD

[1] MAIN UNIT PRINTED WIRING BOARD.......

[2] TERMINAL UNIT PRINTED WIRING BOARD [3] R/C, LED UNIT PRINTED WIRING BOARD.

[4] KEY UNIT PRINTED WIRING BOARD.........

[5] MINI AV UNIT PRINTED WIRING

BOARD .........................................................

[6] ILLUMINATION UNIT PRINTED WIRING

BOARD .........................................................

[7] POWER UNIT PRINTED WIRING BOARD .. [8] AC INLET UNIT PRINTED WIRING BOARD

CHAPTER 8. SCHEMATIC DIAGRAM

[1] DESCRIPTION OF SCHEMATIC DIAGRAM

[2] SCHEMATIC DIAGRAM ...............................

Parts Guide

..........5-1

..........6-1

..........6-2

..........6-3

..........6-4

..........6-5

..........6-6

..........6-7

..........6-8

..........6-9

..........7-1

..........7-5

..........7-7

..........7-8

........7-10

........7-11

........7-13

..........8-1

..........8-2

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.

This document has been published to be used for after sales service only. The contents are subject to change without notice.

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

LC42XL2E

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

1. For continued safety, no modification of any circuit should be attempted.

2. Disconnect AC power before servicing.

CAUTION:

FOR CONTINUED PROTECTION AGAINST A RISK OF FIRE REPLACE ONLY WITH SAME TYPE FUSE.

• Use an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across the resistor.

• Connect the resistor connection to all exposed metal parts having a return to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor. All checks must be repeated with the AC cord plug connection reversed. (If necessary, a nonpolarized adaptor plug must be used only for the purpose of completing these checks.) Any reading of 1.05 V peak (this corresponds to 0.7 mA peak AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the monitor to the owner.

F7000 (6.3A/250V)

 BEFORE RETURNING THE RECEIVER (Fire & Shock Hazard)

Before returning the receiver to the user, perform the following safety checks:

3. Inspect all lead dress to make certain that leads are not pinched, and check that hardware is not lodged between the chassis and other metal parts in the receiver.

4. Inspect all protective devices such as non-metallic control knobs, insulation materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacitor networks, mechanical insulators, etc.

5. To be sure that no shock hazard exists, check for leakage current in the following manner.

• Plug the AC cord directly into a 220~240 volt AC outlet.

• Using two clip leads, connect a 1.5k ohm, 10 watt resistor paralleled by a 0.15µF capacitor in series with all exposed metal cabinet parts and a known earth ground, such as electrical conduit or electrical ground connected to an earth ground.

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

TO EXPOSED METAL PARTS

SAFETY NOTICE

Many electrical and mechanical parts in LCD color television have special safety-related characteristics.

These characteristics are often not evident from visual inspection, nor can protection afforded by them be necessarily increased by using replacement components rated for higher voltage, wattage, etc.

Replacement parts which have these special safety characteristics are identified in this manual; electrical components having such features

are identified by “ ” and shaded areas in the Replacement Parts List and Schematic Diagrams.

For continued protection, replacement parts must be identical to those used in the original circuit.

The use of a substitute replacement parts which do not have the same safety characteristics as the factory recommended replacement parts shown in this service manual, may create shock, fire or other hazards.

DVM

AC SCALE

1.5k ohm 10W

0.15µF

TEST PROBE

CONNECT TO KNOWN EARTH GROUND

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

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.

Example:

L Fa

Indicates lead-free solder of tin, silver and copper.

L F a/a

Using lead-free wire solder

• When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause damage or accident due to cracks.

As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 °C, we recommend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.

Soldering

• As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 °C which is higher than the conventional lead solder by 40 °C, and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period of time. However, Since the land may be peeled off or the maximum heat-resistance temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady soldering condition.

Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on and off the power of the bit as required.

If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after every use of it.

When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.

• Be careful when replacing parts with polarity indication on the PWB silk.

Lead-free wire solder for servicing

Part No. Description Code

ZHNDAi123250E J φ0.3mm 250g (1roll) BL ZHNDAi126500E J φ0.6mm 500g (1roll) BK ZHNDAi12801KE J φ1.0mm 1kg (1roll) BM

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

LC42XL2E

CHAPTER 1. OPERATION MANUAL

Service Manual

[1] SPECIFICATIONS (LC-42/46/52XL2E/S/RU)

1 – 1

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

[2] SPECIFICATIONS (LC-46/52X20E/S/RU)

1 – 2

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

[3] OPERATION MANUAL (LC-42/46/52XL2E/S/RU)

1 – 3

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

TV (Front view)

Blue illumination LED indicator

Remote control censor

OPC censor

TV (Rear view)

(Power) button

MENU button

(Input source) button

P (

/ ) Programme [channel] buttons

( / )

Volume buttons

OPC indicator

SLEEP indicator

(Standby/On)

indicator

4 5

1 AC INPUT terminal 2 EXT 3 terminals 3 EXT 4 (HDMI) terminal 4 Headphones 5 SERVICE socket

6 7891011

6 EXT 1 (RGB) terminal 7 EXT 2 (RGB) terminal 8 EXT 8 (COMPONENT/AUDIO) terminals 9 Antenna terminal 10 OUTPUT (AUDIO) terminals 11 DIGITAL AUDIO OUTPUT terminal

12 COMMON INTERFACE slot

13 RS-232C terminal 14 EXT 5 (HDMI) terminal 15 EXT 6 (HDMI/AUDIO) terminals 16 EXT 7 (ANALOGUE RGB/AUDIO) terminals

1 – 4

* Remove the cover when inserting the CI

Module.

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

1 – 5

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

1 – 6

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

1 – 7

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

[4] OPERATION MANUAL (LC-46/52X20E/S/RU)

Remote control unit

1 (Standby/On)

2 Buttons for useful operations

(Teletext)

ATV: Display analogue teletext. DTV: Select MHEG-5 and teletext for DTV.

(Reveal hidden Teletext)

(Subtitle)

ATV/DTV/External: Switch subtitle languages on/off.

(Top/Bottom/Full)

Set the area of magnification in teletext mode.

(Subpage)

(Freeze/Hold)

Press to freeze a moving image on the screen.

3 0 - 9 numeric buttons

Set the channel. Enter desired numbers. Set the page in teletext mode.

(Flashback)

Press to return to the previous image in normal viewing mode.

5DTV

Press to access DTV mode.

6ATV

Press to access conventional analogue TV mode.

8 ( / ) (Volume)

11 AV MODE

13 END

14 R/G/Y/B (Colour) buttons

(Sound mode)

Select the sound multiplex mode.

Increase/decrease TV volume.

(Mute)

TV sound on/off

(WIDE MODE)

Select the wide mode.

Select a video setting.

/ / / (Cursor)

Select a desired item on the setting screen.

ATV/DTV/DVD/STB: Execute a command within the menu screen. ATV/DTV: Display the programme list when no other menu screen is running.

Exit the menu screen.

On the menu screen, the coloured buttons are correspondingly used to select the coloured items on the screen. (e.g. EPG, MHEG-5, TELETEXT)

4 5

6 7

8 9

16 17

18 19

16 EPG

17 RADIO

18 P. INFO

19 P (

21 SLEEP

22 MENU

24 ACTION (Action Mode)

25 AQUOS LINK buttons

(INPUT SOURCE)

Select an input source. (TV, EXT1, EXT2, EXT3, EXT4, EXT5, EXT6, EXT7, EXT8)

DTV: Display the EPG screen.

DTV: Switch between Radio and Data mode.

Press to display programme information which is transmitted through digital video broadcasting in the upper left corner of the screen. (DTV only)

/ )

Select the TV channel. In analogue TV mode, external sources can also be selected.

(Display information)

Press to display the station information (channel number, signal, etc.) in the upper right corner of the screen.

Press to schedule a time for the TV to automatically standby.

ATV/DTV: Menu screen on/off. DVD: Title menu on/off.

(Return)

Return to the previous menu screen.

Action Mode on/off.

TV mode: If external equipment such as a AQUOS BD Player is connected via HDMI cables and is AQUOS LINK compatible, you can use these AQUOS LINK buttons.

DVD/VCR mode: Press OPTION to pause the picture.

• The buttons except OPTION are correspondingly used to select the items on the screen. STB mode: Only the used to operate on STB.

button can be

1 – 8

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

1 – 9

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

1 – 10

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

1 – 11

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

1 – 12

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

[5] DIMENSIONS (LC-42/46/52XL2E/S/RU)

Unit: mm

1 – 13

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

[6] DIMENSIONS (LC-46/52X20E/S/RU)

Unit: mm

1 – 14

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

LC42XL2E

CHAPTER 2. REMOVING OF MAJOR PARTS

Service Manual

[1] REMOVING OF MAJOR PARTS (LC-42XL2E/S/RU)

1. Remove the 1 lock screw , 2 lock screws , 7 lock screws and the 7 lock screws . Detach the Rear Cabinet.

REAR CABINET

2 – 1

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

2. Remove all the connectors from PWBs.

Wire "SP"

Wire "SP" to WH

3. Remove the 2 lock screws . and detach the Speaker L/R.

Wire "SP"

Wire "SP" to WH

Speaker R Speaker L

2 – 2

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

Wire "RA" from OBON

Wire "RA"

LED PWB Front side

LED PWB Back side

Pull out Wire "IL","RA" from bottom

1st, Set LED PWB Under LIB

#Set PWB to gide lib surely

Next,Push PWB hooked

Wire "IL"

4. Remove all the connectors from PWBs.

LED PWB (with wire)

Wire "RA" to WH

Wire "IL" from Illumination

5. Remove the R/C, LED Unit.

LED PWB

2 – 3

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

6. Remove the 8 lock screws , and the 6 lock hooks . Detach the LCD Panel Module.

6 7

FRONT CABINET

2 – 4

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

BOTTOM COVER

Wire "IL"

#Hook Surely

#Connector side Down

#Wire "IL" pass between SP Boss

and Panel hooker

Illumination Unit

To LED PWB

TAPING

Wire "IL" Connection Direction

Wire "IL"

Tape

Lib

7. Remove the 1 lock screw . and detach the Bottom Cover.

8. Remove all the connectors from PWBs.

9. Remove the Illumination Unit.

Wire "IL" to rib

FRONT CABINET

Illumination Unit

Wire "IL"

2 – 5

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

㪮㫀㫉㪼㩷㪣㪙

Wire "LB" to Hole

10.Remove the 4 lock screws . and detach the CTL SHIELD with RADIATOR.

CTL-SHIELD with RADIATOR

2 – 6

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

FFC "HM" to WH

Wire "RA"

11.Remove all the connectors from PWBs.

Wire "LB", "LA1" to WH

Wire "KM" to WH

Wire "KM", "VD", "US" to WH

Wire "KM", "VD"to WH

Wire "KM" to Hook

Wire "KM"

Wire "LW"

Wire "FR"

Wire "LA1"

Wire "LB"

Wire "VD"

FFC "HM"

Wire "US"

2 – 7

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

PNL SUPPORT ANG

12.Remove the 1 lock screw , and the 11 lock screws . Detach the Chassis Tray and MINI AV Sub Ass’y.

13.Remove the 14 lock screws . and detach the Panel Support Angle.

LCD MODULE

1212

2 – 8

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

M-AV KEY COV

KEY PWB

Slant View

Top View

#Set PWB under LIB

Open side

14.Remove the 6 lock hooks . and detach the KEY Unit.

15.Remove the 2 lock screws , and the 2 lock screws . Detach the MINI AV Unit.

MINI AV PWB

MINI AV ANG

MINI-AV SHIELD

2 – 9

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

Open Side

Pull out Wire "LW" form Opening

Wire "LW"

16.Remove all the connectors from PWBs.

17.Remove the 10 lock screws . and detach the Main Shield and AV Shield.

Wire "LW" to WH

MAIN SHIELD

AV SHIELD

2 – 10

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

B to B connection

Pull same time

#SCART Angle Stepping on terminal

18.Remove all the connectors from PWBs.

19.Remove the 2 lock screws , and the 1 lock screw . Detach the Terminal Angle Bottom.

18 17

TML ANG BTM

SCART ANGLE

2 – 11

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

Wire "LW"

wire LB

To Main PWB

To LCD Control PWB

Taping

Wire "VD","SP_R" to WH

Wire "HM" to WH

20.Remove all the connectors from PWBs.

Wire "LW"

Wire "RA","US","KM" to WH

Upper side wire SP_R

Wire "RA","US","KM","VD" to WH

2 – 12

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU

Wire "LA1"

Wire "LB","PL" to WH

Wire "LB"

Wire "PL" to WH

Wire "LB" to this WH

Wire ”PL”

2 – 13

+ 234 hidden pages