Sharp LC-32DH57E Service manual

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LC-32DH57E/RU/S (1st Edition)

SERVICE MANUAL

No. S59Z3LC32DH57

LCD COLOUR TELEVISION

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-32DH57E/RU/S

CONTENTS

SAFETY PRECAUTION

IMPORTANT SERVICE SAFETY PRE-

CAUTION ............................................................i

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

End of life disposal ............................................ iii

CHAPTER 1. OPERATION MANUAL

[1] SPECIFICATIONS ......................................... 1-1

[2] OPERATION MANUAL .................................. 1-2

[3] DIMENSIONS ................................................ 1-6

CHAPTER 2. REMOVING OF MAJOR PARTS

[1] REMOVING OF MAJOR PARTS ................... 2-1

CHAPTER 3. ADJUSTMENT PROCEDURE

[1] ADJUSTMENT PROCEDURE ....................... 3-1

CHAPTER 6. BLOCK DIAGRAM/WIRING DIAGRAM

[1] SYSTEM BLOCK DIAGRAM .........................6-1

[2] OVERALL WIRING DIAGRAM ......................6-2

CHAPTER 7. PRINTED WIRING BOARD

[1] MAIN UNIT PRINTED WIRING BOARD........7-1

[2] LED UNIT/KEY UNIT PRINTED WIRING

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

[3] POWER UNIT PRINTED WIRING BOARD........7-6

[4] INVERTER UNIT PRINTED WIRING

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

CHAPTER 8. SCHEMATIC DIAGRAM

[1] DESCRIPTION OF SCHEMATIC DIA-

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

[2] SCHEMATIC DIAGRAM ................................8-2

CHAPTER 4. TROUBLESHOOTING TABLE

[1] TROUBLESHOOTING TABLE ....................... 4-1

CHAPTER 5. MAJOR IC INFOMATIONS

[1] MAJOR IC INFOMATIONS ............................ 5-1

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.

Parts Guide

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

LC-32DH57E/RU/S (1st Edition)

LC-32DH57E-BK

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.

F7001, F7002 (3.15A/250V)

DVM

AC SCALE

 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.

1.5k ohm 10W

0.15µF

TEST PROBE

CONNECT TO KNOWN EARTH GROUND

LC-32DH57E/RU/S (1st Edition)

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-32DH57E/RU/S (1st Edition)

End of life disposal

A. Information on Disposal for Users (private households)

1. In the European Union

Attention: If you want to dispose of this equipment, please do not use the ordinary dust bin!

Used electrical and electronic equipment must be treated separately and in accordance with legislation that requires proper treatment, recovery and recycling of used electrical and electronic equipment. Following the implementation by member states, private households within the EU states may return their used electrical and electronic equipment to designated collection facilities free of charge*. In some countries* your local retailer may also take back your old product free of charge if you purchase a similar new one.

Attention: Your product is marked with this symbol. It means that used electrical and electronic products should not be mixed with general household waste. There is a separate collection system for these products.

*) Please contact your local authority for further details.

If your used electrical or electronic equipment has batteries or accumulators, please dispose of these separately beforehand according to local requirements.

By disposing of this product correctly you will help ensure that the waste undergoes the necessary treatment, recovery and recycling and thus prevent potential negative effects on the environment and human health which could otherwise arise due to inappropriate waste handling.

2. In other Countries outside the EU

If you wish to discard this product, please contact your local authorities and ask for the correct method of disposal.

For Switzerland: Used electrical or electronic equipment can be returned free of charge to the dealer, even if you don’t purchase a new product. Further collection facilities are listed on the homepage of www.swico.ch or www.sens.ch.

B. Information on Disposal for Business Users

1. In the European Union

If the product is used for business purposes and you want to discard it:

Please contact your SHARP dealer who will inform you about the take-back of the product. You might be charged for the costs arising from take-back and recycling. Small products (and small amounts) might be taken back by your local collection facilities.

For Spain: Please contact the established collection system or your local authority for take-back of your used products.

2. In other Countries outside the EU

If you wish to discard of this product, please contact your local authorities and ask for the correct method of disposal.

The battery supplied with this product contains traces of Lead.

For EU: The crossed-out wheeled bin implies that used batteries should not be put to the general household waste! There is a separate collection system for used batteries, to allow proper treatment and recycling in accordance with legislation. Please contact your local authority for details on the collection and recycling schemes.

For Switzerland: The used battery is to be returned to the selling point.

For other non-EU countries: Please contact your local authority for correct method of disposal of the used battery.

iii

LC-32DH57E-BK

CHAPTER 1. OPERATION MANUAL

[1] SPECIFICATIONS

LC-32DH57E/RU/S (1st Edition)

Service Manual

Item

LCD panel

Resolution 1,049,680 pixels (1,366 x 768)

Video Colour System PAL/SECAM/NTSC 3.58/NTSC 4.43/PAL 60

TV-Standard

TV Function

Viewing angles 176 ° (H), 176 ° (V)

Audio amplifier 10 W x 2

Speaker (35 mm x 100 mm) x 2

Terminals

OSD language

Power Requirement

Power Consumption (Method IEC62087)

Weight 10.5 kg (Without stand), 11.5 kg (With stand)

Operating temperature

Receiving Channel

TV-Tuning System

STEREO/BILINGUAL NICAM/A2

Antenna

RS-232C D-Sub 9 pin male connector

EXT 1 SCART (AV input, Y/C input, RGB input, TV output)

EXT 2 SCART (AV input/monitor output, Y/C input)

EXT 3 COMPONENT IN (Y/P

EXT 4 15 pin mini D-sub

HDMI 1 (EXT 5) HDMI

HDMI 2 (EXT 6) HDMI

HDMI 3 (EXT 7) HDMI

EXT 8 RCA pin (AV input)

SERVICE USB

HDMI 2/PC AUDIO (R/L) Ø 3.5 mm jack*

DIGITAL AUDIO OUTPUT Optical Digital audio output

C. I. (Common Interface) EN50221, R206001

OUTPUT RCA pin (AUDIO R/L)

Headphones Ø 3.5 mm jack (Audio output)

Analogue CCIR (B/G, I, D/K, L/L’)

Digital DVB-T (2K/8K OFDM)

VHF/UHF

CATV

LCDCOLOURTV(32"), LC-32DH57E, LC-32DH57RU, LC-32DH57S

Advanced Super View & BLACK TFT LCD (32")

IR A ch_E69 ch (Digital), E2_E69 ch, F2_F10 ch, I21_I69 ch, IR A_IR J ch

Hyper-band, S1_S41 ch

Auto Preset 999 ch (non-Nordic [DTV]), Auto Preset 9999 ch (Nordic [DTV]), Auto Preset 99 ch (ATV), Auto Label, Auto Sort

UHF/VHF 75

Czech, Danish, Dutch, English, Estonian, Finnish, French, German, Greek, Hungarian, Italian, Latvian, Lithuanian, Norwegian, Polish, Portuguese, Russian, Slovak, Slovene, Spanish, Swedish, Turkish, Ukrainian

AC 220-240 V,50 Hz

90 W (0.6 W Standby)

0°Cto+40°C

Ω

Din type (Analogue & Digital)

B(CB

)/PR(CR), RCA pin (AUDIO R/L))

The HDMI 2 and EXT 4 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.

NOTE

Refer to the inside back cover for dimensional drawings.

•

Optional accessory

The listed optional accessory is available for this LCD colour TV. Please purchase them at your nearest shop.

Additional optional accessories may be available in the near

• future. When purchasing, please read the newest catalogue for compatibility and check the availability.

1 – 1

No. Part name Part number

Wall mount bracket (LC-

32DH57E, LC-32DH57RU, LC-32DH57S)

AN-37AG5

LC-32DH57E/RU/S (1st Edition)

[2] OPERATION MANUAL

TV (Front view)

1 2 3

TV (Rear view)

8 9

Remote control sensor

OPC sensor

2 3 4 5 6 7

(Standby/On indicator)

(Power button)

MENU (Menu button)

(Input source button) P/ (Programme [channel] buttons)

+/- (Volume buttons)

COMMON INTERFACE slot

SERVICE terminal (USB terminal

for service personnel only) HDMI 3 (HDMI) terminal

EXT 8 terminals

Headphones

AC INPUT terminal

EXT 4 (ANALOGUE RGB)

terminal HDMI 1 (HDMI) terminal

HDMI 2 (HDMI) terminal

Antenna terminal

HDMI 2/PC AUDIO (R/L) jack*

DIGITAL AUDIO OUTPUT

terminal RS-232C terminal

EXT 3 (COMPONENT/AUDIO)

terminals EXT 1 (RGB) terminal

EXT 2 (AV) terminal

OUTPUT (AUDIO) terminals

WARNING

Excessive sound pressure from earphones

• and headphones can cause hearing loss.

•

Do not set the volume at a high level. Hearing experts advise against extended listening at high volume levels. The SERVICE terminal is reserved only

• for qualified service personnel. Do not connect anything to the terminal.

14 15 16 17

The HDMI 2 and EXT 4 terminals can both use the same audio input terminal (HDMI 2/PC AUDIO (R/L)). However, the

proper item must be selected in the “PC Audio Select” menu.

1 – 2

Remote control unit

LC-32DH57E/RU/S (1st Edition)

(Standby/On)

Numeric buttons 0-9

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

When the five Nordic countries

• (Sweden, Norway, Finland, Denmark, or Iceland) are selected in the country setting from “Auto Installation”, DTV/A TV channels are four digits. When another country is selected, DTV/ATV channels are three digits.

(Flashback)

Press to return to the previously selected channel or external input.

(WIDE MODE)

Select a wide mode.

(Freeze)

Press to freeze a moving image on the screen.

/ / / (Cursor)

Select a desired item on the setting screen.

Execute a command within the “MENU” screen. TV: Display the programme list when no other “MENU” screen is running.

END

Exit the “MENU” screen.

Colour (Red/Green/Yellow/ Blue) buttons

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

EPG

TV: Display the EPG screen.

(Display information)

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

SLEEP

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

AV MODE

Select a video setting.

ECO (Off/Standard/Advanced)

Select “Energy Save” setting.

(Sound mode)

Select a sound multiplex mode.

(Mute)

TV sound on/off.

+/- (Volume)

Increase/decrease TV volume.

Select the TV channel.

(INPUT SOURCE)

Select an input source.

Directly select EXT 4.

“MENU” screen on/off.

RETURN

Return to the previous “MENU” screen.

Buttons for useful operations

(Teletext)

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

(Reveal hidden Teletext)

(Subtitle)

Switch subtitle languages on/off.

(Freeze/Hold)

Press to freeze a moving image on the screen. Teletext: Stop updating teletext pages automatically or release theholdmode.

(Subpage)

(Top/Bottom/Full)

Set the area of magnification in teletext mode.

1 – 3

LC-32DH57E/RU/S (1st Edition)

Attaching the stand unit

Before attaching (or detaching) the stand, unplug the AC cord from the AC INPUT terminal.

• Before performing work, spread cushioning over the surface on which you will be laying the TV. This will prevent it

• from being damaged.

CAUTION

•

Attach the stand in the correct direction.

•

Be sure to follow the instructions. Incorrect installation of the stand may result in the TV falling over.

Confirm that there are four screws with the

stand unit.

Place the stand unit onto the supporting post on the bottom of the TV ( ).

Inserting the batteries

Before using the TV for the first time, insert two supplied “AA” size zinc-carbon batteries. When the batteries become depleted and the remote control unit fails to operate, replace the batteries with new “AA” size batteries.

Open the battery cover.

1 2

Insert two supplied “AA” size batteries.

Place batteries with their terminals corresponding to the (+)

• and (-) indications in the battery compartment.

Close the battery cover.

CAUTION

Improper use of batteries can result in chemical leakage or explosion. Be sure to follow the instructions below.

Do not mix batteries of different types. Different types of batteries have different characteristics.

• Do not mix old and new batteries. Mixing old and new batteries can shorten the life of new batteries or cause chemical leakage in old

• batteries.

•

Remove batteries as soon as they have worn out. Chemicals that leak from batteries can cause a rash. If you find any chemical leakage, wipe thoroughly with a cloth.

•

The batteries supplied with this product may have a shorter life expectancy due to storage conditions. If you will not be using the remote control unit for an extended period of time, remove the batteries from it.

•

Insert and tighten the four screws on the

bottom of the stand unit as shown ( ).

NOTE

To detach the stand unit, perform the steps in reverse order.

• A screw driver is not supplied with this product.

•

Using the remote control unit

Use the remote control unit by pointing it towards the remote control sensor. Objects between the remote control unit and sensor may prevent proper operation.

5m5m

30° 30°

Remote control sensor

Cautions regarding the remote control unit

Do not expose the remote control unit to shock. In addition, do not expose the remote

• control unit to liquids, and do not place in an area with high humidity.

•

Do not install or place the remote control unit under direct sunlight. The heat may cause deformation of the unit.

•

The remote control unit may not work properly if the remote control sensor of the TV is under direct sunlight or strong lighting. In such cases, change the angle of the lighting or the TV, or operate the remote control unit closer to the remote control sensor.

1 – 4

LC-32DH57E/RU/S (1st Edition)

Troubleshooting

Problem Possible Solution

No power.•

The TV cannot be operated.•

Remote control unit does not operate.•

Picture is cut off.• Is the image position correct?

Strange colour, light colour, or dark colour,

• Adjust the picture tone. or colour misalignment.

Power is suddenly turned off.• The TV’s internal temperature has increased. Remove any objects blocking the vent or clean.

No picture.•

No sound.• Is the volume too low?

The TV sometimes makes a cracking

• sound.

•

Check if you pressed on the remote control unit. If the indicator on the TV lights up red, press .

•

Is the AC cord disconnected?

•

Check if you pressed on the TV.

External influences such as lightning, static electricity, etc., may cause improper operation. In this case, operate

• the TV after first turning off the power, or unplugging the AC cord and re-plugging it in after one or two minutes.

•

Are batteries inserted with polarity (+, -) aligned?

•

Are batteries worn out? (Replace with new batteries.)

•

Are you using it under strong or fluorescent lighting?

•

Is a fluorescent light illuminating to the remote control sensor?

• Are screen mode adjustments (WIDE MODE) such as picture size made correctly?

•

• Is the room too bright? The picture may look dark in a room that is too bright.

• Check the “Colour System” setting.

•

Is sleep timer set? Set to “Off” by pressing SLEEP on the remote control unit.

•

Is “No Signal Off” or “No Operation Off” activated?

•

Are connections to external equipment correct?

•

Is the correct input source selected?

•

Is a non-compatible signal being input?

•

Is the picture adjustment correct?

•

Is the antenna connected properly?

•

Is “On” selected in “Audio Only”?

• Make sure that headphones are not connected.

• Check if you pressed on the remote control unit.

•

Is the proper item selected in the “PC Audio Select” menu when connecting devices to the HDMI 2 terminal or the EXT 4 terminal?

This is not a malfunction. This happens when the cabinet slightly expands and contracts according to changes

• in temperature. This does not affect the TV’s performance.

Cautions regarding use in high and low temperature environments

When the TV is used in a low temperature space (e.g., room, office), the picture may leave trails or appear slightly delayed. This is not

• a malfunction, and the TV will recover when the temperature returns to normal. Do not leave the TV in a hot or cold location. Also, do not leave the TV in a location exposed to direct sunlight or near a heater, as this

• may cause the cabinet to deform and the LCD panel to malfunction. Storage temperature: + 5 °C to + 35 °C.

Information on the software license for this product

Software composition

The software included in this product is comprised of various software components whose individual copyrights are held by SHARP or by third parties.

Software developed by SHARP and open source software

The copyrights for the software components and various relevant documents included with this product that were developed or written by SHARP are owned by SHARP and are protected by the Copyright Act, international treaties, and other relevant laws. This product also makes use of freely distributed software and software components whose copyrights are held by third parties. These include software components covered by a BSD-like License or other license agreement. We are unable to answer any questions about the source code for the open source software. The source code for the software components whose copyrights are held by SHARP is not distributed.

Acknowledgements

The following open source software components are included in this product:

• Freetype • unicode • Teletext font • libpng • zlib

1 – 5

LC-32DH57E/RU/S (1st Edition)

[3] DIMENSIONS

Unit: mm

390.0 390,0

575.0

575,0

528.0

528,0

47.0

47,0

791.0 791,0

699.2 699,2

200.0 200,0

393.8

393,8

333.5

333,5

66.2 66,2

123.5 123,5

235.0 235,0

200.0

200,0

82.0

82,0

1 – 6

LC-32DH57E-BK

CHAPTER 2. REMOVING OF MAJOR PARTS

Service Manual

[1] REMOVING OF MAJOR PARTS

1. Removing of Rear Cabinet Ass’y.

1. Remove the 1 lock screw , 3 lock screws , 9 lock screws and detach the Rear Cabinet Ass’y.

Rear Cabinet Ass'y

LC-32DH57E/RU/S (1st Edition)

2 – 1

LC-32DH57E/RU/S (1st Edition)

2. Removing of Connectors, Speakers, Stand Angle Ass’y and Stand Ass’y.

1. Remove all the connectors from all the PWBs.

2. Remove the 2 lock screws and detach the Speaker-L and Speaker-R.

3. Remove the 2 lock screws , 4 lock screws and detach the Stand Angle Ass’y.

4. Remove the 2 lock screws and detach the Stand Ass’y.

Speaker-R

[SP] [SP]

Stand Angle Ass'y

Speaker-L

Stand Ass'y

2 – 2

LC-32DH57E/RU/S (1st Edition)

3. Removing of Main PWB Shield and AV Cover Ass’y.

1. Remove all the connectors from all the PWBs.

2. Remove the 4 lock screw , 2 lock screws , 1 lock screw , 6 lock screws and detach the Main PWB Shield.

3. Remove the 1 lock screw and detach the AV Cover Ass’y.

Earth Plate

AV Cover Ass'y

Main PWB Shield

[PD/LB]

Main PWB

[PD]

[LB] [LP]

[LW]

[SP]

[RA/KM]

2 – 3

LC-32DH57E/RU/S (1st Edition)

4. Removing of LED Unit, MAIN Unit, POWER Unit, INVERTER Unit, AC Inlet Angle, Control Button and KEY Unit.

1. Remove all the connectors from all the PWBs.

2. Remove the 1 lock screw and detach the LED Unit.

3. Remove the 2 lock screws and detach the MAIN Unit.

4. Remove the 4 lock screws and detach the POWER Unit.

5. Remove the 3 lock screws and detach the INVERTER Unit.

6. Remove the 2 lock screw and detach the AC Inlet Angle.

7. Remove the Control Button.

8. Remove the KEY Unit.

MAIN Unit

KEY Unit

POWER Unit

INVERTER Unit

[BtoB][BtoB]

[KM]

Control Button

LED Unit

[RA]

AC Inlet Angle

2 – 4

5. Removing of 32” LCD Panel Module.

1. Remove the 4 lock screws and detach the 32” LCD Panel Module from Front Cabinet.

Front Cabinet Ass'y

LC-32DH57E/RU/S (1st Edition)

32" LCD Panel Module

2 – 5

LC-32DH57E/RU/S (1st Edition)

LC-32DH57E-BK

CHAPTER 3. ADJUSTMENT PROCEDURE

Service Manual

[1] ADJUSTMENT PROCEDURE

1. Adjustment method after PWB and/or IC replacement due to repair

The unit is set to the optimum at the time of shipment from the factory. If any value should become improper or any adjustment is necessary due to the part replacement, make an adjustment according to the following procedure.

1. Procure the following units in order to replace the main unit, E2PROM (IC8455).

MAIN UNIT: DUNTKF111FM08

NOTE: [Caution when replacing ICs in the main unit (IC501)]

The above ICs are EEPROMs storing the EDID data of PC data.

Before replacing the relevant part, procure the following parts in which the data have been rewritten.

IC501 RH-iXC206WJQZS EDID (PC) ANALOG-RGB

2. Entering and exiting the adjustment process mode

1. Press the “MAIN POWER” key on the set of running TV set to force power off.

(Or, unplug the AC power cord of running TV set to force power off.)

2. While holding down the “ (-)” and “INPUT” keys on the set at once, press the “MAIN POWER” key on the set to turn on the power.

The letter “K” appears on the screen.

3. Next, hold down the “ (-)” and “P ( )” keys on the set at once.

Multiple lines of orange characters appearing on the screen indicate that the set is now in the adjustment process mode.

If you fail to enter the adjustment process mode (the display is the same as normal start up), retry the procedure.

4. To exit the adjustment process mode after the adjustment is done, press the MAIN POWER key and turn off a power supply. or unplug the AC power cord to force power off.

(When the power is turned off with the remote controller, once unplug the AC power cord and wait for 10 seconds before plug it in again.)

CAUTION: Use due care in handling the information described here lest the users should know how to enter the adjustment process mode.

If the settings are tampered with in this mode, unrecoverable system damage may result.

3. Remote controller key operation in adjustment process mode.

1. key operation

Remote controller key Main unit key Remote controller key Main unit key Function

P (/) P (/)

(+/-) (+/-) Cursor ( / ) — Turning a page (PREVIOUS/NEXT) Cursor ( / ) — Changing a selected line setting (+10/-10)

Input button Input button

OK — Executing a function

Input mode is switched automatically when relevant adjustment is started so far as the necessary input signal is available.

Moving an item (line) by one (UP/DOWN)

Changing a selected item setting (+1/-1)

Input source switching (toggle switching) (TV→EXT1→EXT2→EXT3→EXT4→HDMI1→HDMI2→HDMI3→EXT8)

3 – 1

LC-32DH57E/RU/S (1st Edition)

4. Description of display

(1) Current page / Total pages (2) Currentry selected input

(3) Inch setting and Model name display

PAGE 1/7 TV 32E_DH57E Adjustment process menu header

Main Version 1.14 Boot Version 20090429.1.12 T-CON Version 00 00 00 00 32 4C 32 B1 INCH SIZE xx ERROR RESET NO [NO/YES] STANDBY CAUSE 00 00 00 00 00

(4) Item name (5) Parameter

No. Description Display specification

(1) Current page/total pages 2char/2char Decimal Number mark. (2) Currentry selected input TV→EXT1→EXT2→EXT3→EXT4→HDMI1→HDMI2→HDMI3→EXT8 (3) Inch setting and destination display 32 (4) Item name Max. 30 char (5) Parameter table Max. 60 char (Preset value of each item)

[1] 00H 00M [2] 00H 00M [3] 00H 00M [4] 00H 00M [5] 00H 00M

3 – 2

LC-32DH57E/RU/S (1st Edition)

5. Adjustment process mode menu

The character string in brackets [ ] will appear as a page title in the adjustment process menu header.

Page Line Item Description Remarks (adjustment detail, etc.)

1/7

1 Main Version 1.14 Main microprocessor version 2 Boot Version 20090429.1.12 Boot version of the main microprocessor 3 T-CON Version 00 00 00 00 32 4C 32 B1 T-CON microprocessor version 4 INCH SIZE 32 Initial Setting of panel size 5 ERROR RESET NO [NO/YES] Lamp error reset. (Select “YES” and press “OK” key.) 6 STANDBY CAUSE 00 00 00 00 00 Error standby cause. Total operating time before error.

1) 00H 00M (5 times histories)

2) 00H 00M

3) 00H 00M

4) 00H 00M

5) 00H 00M

2/7

1 INDUSTRY INIT [NO/YES(E)/YES(I)/YES(F)/YES(R) Initialization to factory settings execution. 2 PUBLIC MODE OFF [OFF/ON] ON/OFF setting of hotel mode 3 I2C DATA 000000000000 Write and read of data in I2C BUS control IC. 4 I2C STATE WAIT [STANDBY/WAIT] Execution of write and read of I2C DATA

3/7

1 INSPECT USB TERM ENTER Reading inspection of USB memory terminal 2 HDMI CEC TEST ENTER HDMI CEC test

4/7

1 VIDEO ADJ ENTER VIDEO level adjustment execution 2 CHANNEL E-9 3 GAIN 31 Gain adjustment 4 ADJ RESET NO [NO/YES] Reset of adjustment

5/7

1 COM-ADJ ENTER COMPONENT level adjustment execution 2 Y OFF SET 70 Y CUTOFF adjustment value 3 PB OFF SET 128 PB CUTOFF adjustment value 4 PR OFF SET 128 PR CUTOFF adjustment value 5 Y GAIN 140 Y GAIN adjustment value 6 PB GAIN 140 PB GAIN adjustment value 7 PR GAIN 140 PR GAIN adjustment value 8 ADJ RESET NO [NO/YES] Reset of adjustment

6/7

1 RGB-ADJ ENTER SCART RGB level adjustment execution 2 R OFF SET 128 R OFF SET adjustment value 3 G OFF SET 128 G OFF SET adjustment value 4 B OFF SET 128 B OFF SET adjustment value 5 R GAIN 80 R DRIVE adjustment value 6 G GAIN 80 G DRIVE adjustment value 7 B GAIN 80 B DRIVE adjustment value 8 ADJ RESET NO [NO/YES] Reset of adjustment

7/7

1 COM BIAS 67 Common Bias auto adjustment execution 2 LCD TEST PATTERN 0 Pattern with built-in LCD controller display 3 WB Point A 500 W/B adjustment, gradation Point A input setting 4 Point B 3500 W/B adjustment, gradation Point B input setting 5 Point A ADJ R 520 W/B adjustment, gradation Point A R_adjustment value 6 ADJ G 500 W/B adjustment, gradation Point A G_adjustment value 7 ADJ B 380 W/B adjustment, gradation Point A B_adjustment value 8 Point B ADJ R 3500 W/B adjustment, gradation Point B R_adjustment value

9 ADJ G 3500 W/B adjustment, gradation Point B G_adjustment value 10 ADJ B 3160 W/B adjustment, gradation Point B B_adjustment value 11 WB WRITE NO [NO/YES] W/B writing of adjustment values 12 WB RESET NO [NO/YES] Reset of W/B adjustment value

3 – 3

LC-32DH57E/RU/S (1st Edition)

6. Special features

1. STANDBY CAUSE (Page 1/7)

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.

7. ROM Writing (HDMI_EDID)

1. EDID writing

1) Get ready the PC with COM port (RS-232C) running on Windows 95/98/ME/2000/XP operating system, as well as the RS-232C cross cable.

2) Start the set with the set connected with the personal computer with the RS232C cross cable.

3) Start the terminal software. (The freeware readily available on the Internet will do.)

4) Make the following settings.

Baud rate : 9600 bps Data LENGTH : 8bit Parity bit : none Stop bit : 1 bit Flow control : none

5) Input following commands to terminal software.

“KRSW0001” PC replies “ERR” (you should ignore this replay) “KKT10037” PC replies “OK” “WRED0000” PC replies “OK” ... At that time, EDID writing finish with succeess.

6) It usually returns to a state by AC-OFF/ON.

Disconnect and connect AC cable, then TV wakes up with normal mode.

2. Software version

(1) Mainmicon Software Ver. 1.14 *1 (2) Boot version of mainmicon Software Ver. 1.12 *1 (3) T-CON Monitor micon Software Ver. 1.0 *1

*1 Please refer to the change report document for the latest version (Issued it to SEES).

3 – 4

LC-32DH57E/RU/S (1st Edition)

8. Adjustment procedure

1. Inch Setting

Adjustment point Adjustment conditions Adjustment procedure

1 Inch Setting Adjustment process mode

Adjustment process “INCH SIZE” menu page 1/7

2. COMB-BIAS Adjustment

Adjustment point Adjustment conditions Adjustment procedure

1 COM-BIAS Adjustment A visual check

Adjustment process “COM BIAS” menu page 7/7

1) Inch Setting with adjustment process mode.

2) Enter the adjustment process mode, refering to the 2nd item.

3) By using P ( / ) key of R/C, Move the cursor to “INCH SIZE” on page 1/

4) Select inch size 32 with the Volume (+)/(-) key of remote control.

5) Press the “OK” key of remote control.

6) After a while, If “*** OK ***” is displayed, the setting is completed.

1) COM-BIAS Adjustment with adjustment process mode.

2) Enter to the adjustment process mode, refering to the 2nd item.

3) By using / key and P ( / ) key of R/C, Move the cursor to “COMBIAS” on page 7/7.

4) Press the “OK” key. then, you can check that the pattern for adjustment is displayed.

5) Adjust so that the flicker for the central part of a screen becomes the minimum using the volume (+)/(-) key of R/C.

6) In order to exit from this process, press the “OK” key of remote control again.

3 – 5

LC-32DH57E/RU/S (1st Edition)

[In-house signal E12CH]

9. Video signal adjustment procedure

* The adjustment process mode menu is listed in 5th item.

Signal generator level adjustment check (Adjustment to the specified level)

• Composite signal PAL/SECAM : 0.7Vp-p ± 0.02Vp-p (White level from pedestal)

• PC (Analog D_sub15pin) signal : 0.7Vp-p ± 0.02Vp-p (White level from pedestal)

• 33K component signal : Y level 0.7Vp-p ± 0.02Vp-p (White level from pedestal) : PB,PR level 0.7Vp-p ± 0.02Vp-p

1. Picture Adjustment

1) Entering the adjustment process mode

Adjustment point Adjustment conditions Adjustment procedure

Enter to the adjustment process mode, refering to the 2nd item.

2) TUNER adjustment

Adjustment point Adjustment conditions Adjustment procedure

1 Setting [Signal]

PAL split colour Bar In-house UV

[Terminal] TUNER

• Feed the In-house signal (PAL color bar) to TUNER.

• Make sure the PAL colour bar pattern has the sync level of 7:3 with the picture level.

• Feed the SMPTE color bar signal to TUNER. JABIL: 203.25MHz

2 Auto adjustment

performance

3) ADC adjustment (Component 33K)

Adjustment point Adjustment conditions Adjustment procedure

1 Setting [Signal]

2 Auto adjustment

performance

4) PC signal adjustment (Analog D-SUB15pin)

Adjustment point Adjustment conditions Adjustment procedure

1 Setting [Signal]

Adjustment process [VIDEO ADJ] menu page 4/7

COMP 33K 50Hz 100% Full field colour bar

[Terminal] EXT3 CONPONENT input

Adjustment process [COM ADJ] menu page 5/7

XGA 60 Hz 100% Full field colour bar

[Terminal] EXT4 PC input

Bring the cursor on [VIDEO ADJ] and press OK key [*** OK ***] appears when finished.

• Feed the COMPONENT 33K 100% Full field colour bar (colour saturation level 100%) signal to the CONPONENT video input of EXT3.

100% white Black

Bring the cursor on [COM ADJ] and press OK key [*** OK ***] appears when finished.

• Feed the XGA 60Hz 100% Full field colour bar (colour saturation level 100%) signal to the EXT4 PC input.

100% white Black

2 Auto adjustment

performance

Adjustment process [RGB ADJ] menu page 6/7

Bring the cursor on [RGB ADJ] and press OK key [*** OK ***] appears when finished.

3 – 6

LC-32DH57E/RU/S (1st Edition)

10. White Balance Adjustment

Adjustment gradation values (INFO) appear on page 7/7 3-4 lines of process adjustment, and adjustment initial values (offset value) appear on pages 7/7 5-10 lines. For white balance adjustment, adjust the offset values on pages 7/7 5-10 lines.

1. Preparation

1) Luminance meter reference device :Minolta CA-210

2) Condition of the unit for adjustment and inspection :Modulated light: MAX (+16)

2. Setting

1) The luminance meter is set to the center of the screen of the set.

2) In “INCH SIZE” on the process adjustment page 1/7, sets it to the size of each panel with the / key to R/C.

3. Adjustment method

Check that the values of point A and B on page 7/7 of process adjustment are set as below. If not, change them accordingly.

WB Point A 500 WB Point B 3500

1) Display the current adjustment status at point B. (Page 7/7 of process adjustment)

The display for checking the adjustment status is toggled by pressing the “OK” button on the remote control.

(Normal OSD display → “B” → display for check (OSD disappears) → “B” → normal OSD display → ...)

2) Read the value of the luminance meter.

3) Change Point B ADJ R/Point B ADJ B (Adjustment offset value) on page 7/7 of process adjustment so that the values of the luminance meter approach x = 0.272 and y = 0.277.

(Basically, Point B ADJ G is not changed.)

4) Follow Point A as well as item 3).

Change Point A ADJ R/Point A ADJ B (Adjustment offset value) on page 7/7 of process adjustment so that the values of the luminance meter approach x = 0.272 and y = 0.277.

5) Select “WB WRITE” on page 7/7 in the process, set “YES”, and press the OK key of remote control.

The adjustment value is written. and then shut down the AC power.

* Initial value of RGB of point B: 3500

* Initial value of RGB of point A: based on calculated of each G point

6) [Adjustment value]

* Teaching set send by engineering dept is set as reference

4. Adjustment reference standard value

Level Spec Data Adjustment Spec Inspection Spec

Point A ref. value

Point B ref. value

Adjustment spec ± 0.004 Adjustment spec ± 0.002

500

3500

x=0.272 y=0.277 x=0.272 y=0.277

Inspection spec ± 0.006 (point 1) Inspection spec ± 0.004 (Excluding the above-mentioned)

±0.001

±0.002

±0.004

3 – 7

LC-32DH57E/RU/S (1st Edition)

PAGE1/7 TV 32E_DH57E

㵘 MainVersion -

Boot Version T-CON Version INCH SIZE ERROR RESET NO STANDBYCAUSE 0000000000

1) 00H 00M

PAGE1/7 TV 32E_DH57E

㵘 MainVersion -

Boot Version T-CON Version INCH SIZE 32 ERROR RESET NO STANDBYCAUSE 0000000000

1) 00H 00M

11. QS Temperature NVM Data Confirmation

During servicing of the LCD TV set, by software upgrading or by any cleaning NVM, it’s mandatory select the “INCH SIZE” in Service Mode, Page 1, according to the size of the TV set.

Default picture after cleaning NVM. Picture with [Inch Setting] to 32.䋨It is actually set as each inch.䋩

12. Initialization to factory settings

After a factory setting, It ends with the AC power supply OFF.

After a factory settings, Do not turn on the power supply. If you turn on the power supply. execute the factory settings again.

Do not do power supply OFF by remote control.

CAUTION: When the factory settings have been made, all user setting data, including the channel settings, are initialized.

(The adjustments done in the adjustment process mode are not initialized.) Keep this in mind when initializing these settings.

Adjustment item Adjustment conditions Adjustment procedure

1 Factory settings Ends in AC power supply

OFF. (See to below caution)

After adjustments, exit the adjustment process mode. To exit the adjustment process mode, turn off the MAIN power key. When the power is turned off with the remote control, unplug the AC power cord and plug it back in. (wait approximately 10 seconds before plugging in the AC power cord)

[Factory setting with adjustment process mode]

• Enter the adjustment process mode.

• Move the cursor to “INDUSTRY INIT” on page 2/7.

• Use the / key of R/C to select a region from “YES (E)/YES (I)/YES (F)/YES (R)” and press the [OK] key.

• “EXECUTING” display appears and initialization starts.

• After a while, “OK” display appears, the setting is completed.

When succeeding: The background color becomes green. When failing: The background color becomes red.

NOTE: Never turn the power off during initialization. When performing factory settings (while displaying page 2 of adjustment process), confirm that the item “INCH SIZE” or the panel size displayed in the upper right corner corresponds

to each panel size. The following items are initialized in the factory setting.

1) User settings

2) Channel data (e.g. broadcast frequencies)

3) Manufacturer option setting

4) Password data

3 – 8

LC-32DH57E/RU/S (1st Edition)

13. Functional explanation of STANDBY CAUSE

13.1. [display method]

It is displayed in the top page of the process adjustment mode. (Page displayed first when entering process mode)

13.2. [Content of display]

1. NORMAL STANDBY CAUSE

The reason that became a power-off by the specification of usual use and the main body is displayed.

(Only the one latest) It is not displayed when power supply OFF is carried out with remote control.

Display code Display character string Reason

00 00 00 00 00 00 When based on No error 0x01 1 RC_STANDBY When based on RC Standby OFF 0x05 5 PC_OUT_OF_RANGE When based on out of range for pc OFF 0x06 6 NO_OPERATION When based on non-operated OFF 0x07 7 NO_SIGNAL When based on non-signal OFF 0x0A a SLEEP_TIMER When based on an sleep-timer OFF 0x0C c RS232C When based on the command from RS232C (standby) 0x18 18 AV_LINK When based on the command from AV-LINK (standby)

2. ERROR STANDBY CAUSE

When main CPU becomes a power-off detecting some abnormalities, the use time of the set at the time of the reason and the power-off is displayed five times.

When time information can be acquired from digital broadcasting, the date and time when the error occurs at the same time is recorded, displayed and when time information cannot be acquired, it becomes the above-mentioned display.

“00” is displayed when abnormality has not been detected even once.

Display error code Display character string Reason

0x1A 1a TEMP_ERROR When temperature (high temperature) is abnormal. 0x1B 1b LAMP_ERROR When lamp is abnormal

0x1C 1c POWER_ERROR When power module is abnormal status.

14. Lamp error detection

1. Function description

This LCD colour television has a function (lamp error detection) to be turned OFF automatically for safety when the lamp or lamp circuit is abnormal.

If the lamp or lamp circuit is abnormal, or some other errors happen, and the lamp error detection is executed, the following occur.

1) The main unit of television is turned OFF about 5 seconds after it is turned ON.

(The power LED on the front side of TV turns from green to red.)

2) If the situation “1” happens 5 times sequentially, the power is turned on (relay is turned ON).

However, the backlight is not turned on, and then the relay is turned OFF after 5 to 6 seconds. (The power LED remains red.)

2. Countermeasures

When television is turned OFF by the lamp error detection mentioned above, it enters the adjustment process with the power LED red.

Entering the adjustment process, turns OFF the error detection and turns ON TV.

This enables the operation check to detect errors in the lamp or lamp circuit.

Check whether “STANDBY CAUSE” on line 6, page 1/7 of the adjustment process is “1B”. it indicates the lamp error detection was executed.

After confirming that the lamp or lamp circuit is normal, reset the lamp error counter pushing “OK” in the R/C.

After resetting counter the green bar appears on Screen.

3. Reset standby cause error list

After confirming that the lamp error counter has been erased, select “ERROR RESET”, page 1/7 of the adjustment process and select YES using the right cursor. For execute press “OK” in the R/C and the label “***OK***” appears on Screen.

3 – 9

15. Blinking display when error is detected

When system received error report, Standby LED (red) blinks as follows.

POWER LED should keep dark while error indication.

1) Lamp error

Blink timing (1 blink/1 period)

Light (H)

Dark (L)

LC-32DH57E/RU/S (1st Edition)

2) Power module error

Blink timing (2 blink/1 period)

㪣㫀㪾㪿㫋㩷㩿㪟㪀

㪛㪸㫉㫂㩷㩿㪣㪀㩷

3) High temperature

Blink timing (5 blink/1 period)

Light (H)

Dark (L)

250ms

㪉㪌㪇

250 250 250 250 250

1000ms

㪉㪌㪇㪉㪌㪇

㪈㪇㪇㪇㫄㫊

250

250250250

1000ms

3 – 10

LC-32DH57E/RU/S (1st Edition)

16. Upgrading the software

1. Unplug AC cable from outlet.

2. Insert an USB memory that is written a new software to USB port.

3. Keep pressing POWER button on LCD panel and plug AC cable to outlet.

4. POWER LED on panel automatically start blinking.

(POWER LED: Both red and green light blinking with sync. In other word, it looks, /blinking period is short ... 2 cycle - light - out - light - out / 1 sec.)

5. After a while (about 2 min.) following screen appears. Indicated percentage means progress of version up.

System Version: EXXXXXXX

STATUS

UPDATING...

6. After the progress becomes 100%, then STATUS area changes “UPGRADE COMPLETE” as followings (POWER LED: Only green blinks slowly ... 2 sec./time).

System Version: EXXXXXXX

100%

STATUS

UPGRADE COMPLETE

* If above screen is not appeared and “UPGRADE FAILURE” is indicated in STATUS area, at that time update failure. Please repeat from step 1.

(POWER LED: Only red blinks slowly ... 2 sec./time).

System Version: EXXXXXXX

50%

STATUS

UPGRADE FAILURE

7. Unplug AC cable from outlet.

8. Remove USB memory from USB port.

3 – 11

LC-32DH57E-BK

CHAPTER 4. TROUBLESHOOTING TABLE

Service Manual

[1] TROUBLESHOOTING TABLE

No power supplied (Front LED does not light up). No power-up even if turned on (Front LED light up)

YES

LC-32DH57E/RU/S (1st Edition)

Is the power cord connector, AC-IN harness, and PD harness connected to the POWER unit normally?

YES Is the connection of B to B connector between the POWER unit and the INVERTER unit normal? (P7201-CN7302)

YES Are F7001 (3.15A) and F7002 (3.15A) normal? NO Replace F7001 or F7002 and switch on the power again.

YES Is DC310V supplied to the primary side capacitor C7114 and C7108, when the power switch is turned on?

YES Is UR12.5V supplied from pin (13) (14) of PD connector (P7202), when the power switch is turned on?

NO Reconnect the power cord, the AC-IN harness and PD harness cor-

rectly.

NO Correct connection or the short circuit of a B to B connector nor-

mally. (P7201-CN7302)

If Fuse still blow out, check L7001, L7002, D7104, VA7001, and VA7002.

NO Check whether there are any abnormalities in a rectification circuit.

(D7104, C7114, C7108, L7101)

YES (*1) fly to the check item of INV60V.

Is about DC400V supplied to primary side capacitor C7112? NO Check whether there are any abnormalities in a power factor

YES Check whether the PS_ON “H” signal is inputted to the pin (6)

of PD connector (P7202) in the power supply unit.

YES Check again after remove parts which have trouble or a short circuit. Is UR12.5V supplied from pin (13) (14) of PD connector (P7202)?

YES After the power supply is turned on, is INV60V generated in connector P7201 (20-23) pin? (*1)

YES Is BU3.3V/D3.3V supplied to pin (5) (6) of RA connector

(P3301) in a main unit, and pin (1) (2) of P101 in the R/C unit?

NO Check whether the PS_ON “H” signal is outputted to pin (10) of PD

NO Is there a part which breaks down on the UR12.5V line or short-cir-

NO Is connector CN7302 of the INV unit removed, and is INV60V gener-

NO Check the power supply circuit of BU3.3V and D3.3V.

improvement circuit. (IC7101, Q7103, D7113, D7213)

connector (P9601) and pin (AC11) of IC3303 (VCT) in the MAIN unit.

culated?

Check the power control circuit of UR12.5V. (IC7201, T7206, D7217, C7220, C7222, C7228, D7215)

YES

Check again after remove parts which have trouble or a short circuit.

ated in connector P7201 (20-23) pin?

NO Check the inverter power circuit of INV60V. (D7227, C7221, C7223, T7206, D7220, D7221)

YES

It is failure inside an INV unit. check broken parts or a shorting part. (Q7809, Q7807, Q7811, Q7810, etc.)

(IC9605, IC9607/IC9602, etc.)

YES “No power supplied (Front LED does not light up)”. “No power-up even if turned on (Front LED light up).” Is it OK?

NO Review the former step and check it again.

4 – 1

LC-32DH57E/RU/S (1st Edition)

Power supply (troubleshooting): A power supply does not come to each main circuit/IC. (1)

The power supply of TUNER (TU1102) does not operate. (IF5V)

Checklist

1) The check of the front page POW-UNIT is completed. ••• UR12.5V is output to PD (P9601) (MAIN-UNIT).

(If UR12.5V is not output, confirm the POW-UNIT again and repair.)

2) Check that STB3.3V is supplied to pin (V24) of IC3303 (included MICON), and the PS_ON signal “H” is output from (AC11) pin within a MAIN

UNIT. (If STB3.3V is not supplied, check IC9605 (BU3.3V-REG), IC9607 (V-DET), and a peripheral circuit.)

3) Refer to attached sheet SYSTEM Block diagram.

4) Attention: The terminal of IC3303 (VCT) cannot be actually checked by hiding oneself, and check it with another terminal of the same line,

please.

Is IF5V supplied to pin (3) of TUNER (TU1102)? YES Check the soldering of TUNER (TU1102), confirm I2C-LINE or

exchange it.

Is D5V output from pin (3) of IC9608 (D5V-REG)? YES Check the soldering of Q1105 and TUNER (TU1102).

Is UR12.5V supplied to pin (2) of IC9608 (REG)? NO Check the pin (1) (2) of connector PD (P9601).

YES

Check whether D_POW “H” signal is input to pin (7) of IC9608? YES Check soldering IC9608 (D5V-REG) or exchange it.

Check whether PS-ON “H” signal is input to pin (2) of IC3305? YES Check soldering IC3305 (V-DET) or exchange it.

NO Check whether PS-ON “H” signal is outputted from pin (AC11) of IC3303.

4 – 2

LC-32DH57E/RU/S (1st Edition)

Power supply (troubleshooting): A power supply does not come to each main circuit/IC. (2)

The power supply of a VIDEO system does not operate. (IC3303) (BU3.3V), (D3.3V), (D1.1V), (CPU1.2V)

Checklist

1) The check of the front page POW-UNIT is completed. ••• UR12.5V is output to PD (P9601) (MAIN-UNIT).

(If UR12.5V is not output, confirm the POW-UNIT again and repair.)

2) Check that STB3.3V is supplied to pin (V24) of IC3303 (included MICON), and the PS_ON signal “H” is output from (AC11) pin within a MAIN

UNIT. (If STB3.3V is not supplied, check IC9605 (BU3.3V-REG), IC9607 (V-DET), and a peripheral circuit.)

3) Refer to attached sheet SYSTEM Block diagram.

4) Attention: The terminal of IC3303 (VCT) cannot be actually checked by hiding oneself, and check it with another terminal of the same line,

please.

Is BU3.3V supplied to pin (V24) of IC3303 (VCT)? NO Check whether BU3.3V is outputted from pin (3) of IC9605

YES

Is D3.3V, D1.1V, and CPU1.2V supplied to pin (F18) (C6) (K12) of IC3303 (VCT).

NO Are D3.3V, D1.1V, and CPU1.2V output from IC9602 (SW) (1)

(REG).

NO Check whether the voltage detection signal input from IC9607 (VDET) (1) pin to IC9605 (7) pinis.

pin, IC9604 (REG) (3) pin, and IC9603 (REG) (5) pin?

YES NO Check soldering and the peripheral circuit of IC3303 (VCT). Or please exchange IC3303.

Power supply (troubleshooting): A power supply does not come to each main circuit/IC. (3)

The power supply of a AUDIO system does not operate. (IC1302/IC2701) (AMP12.5V, S9V, D3.3V)

Checklist

1) The check of the front page POW-UNIT is completed. ••• UR12.5V is output to PD (P9601) (MAIN-UNIT).

(If UR12.5V is not output, confirm the POW-UNIT again and repair.)

2) Check that STB3.3V is supplied to pin (V24) of IC3303 (included MICON), and the PS_ON signal “H” is output from (AC11) pin within a MAIN

UNIT. (If STB3.3V is not supplied, check IC9605 (BU3.3V-REG), IC9607 (V-DET), and a peripheral circuit.)

3) Refer to attached sheet SYSTEM Block diagram.

4) Attention: The terminal of IC3303 (VCT) cannot be actually checked by hiding oneself, and check it with another terminal of the same line,

please.

Is AMP12.5V supplied to pin (1) (10) of IC2701 (A-AMP)? NO Is S12.5V input to pin (3) (4) of PD connector (P9601)?

YES Is D3.3V supplied to pin (3) of IC1302 (A-SW), and is S9V sup-

plied to pin (10)?

NO Check whether D3.3V is outputted from pin (1) of IC9602 (SW),

Check whether the D_1.1V signal inputs to IC9602 (SW) (3) pin and D_POW signal inputs to IC9604 (REG) (7) pin or check soldering etc.

Check a soldering or contact of a PD connector (P9601).

and S9V is outputted from pin (5) of IC9610 (REG).

4 – 3

NO Check whetherD1.1V_ON signal is inputted to pin (3) of IC9602 (SW) and pin (3) of IC9610 (REG).

LC-32DH57E/RU/S (1st Edition)

Power supply (troubleshooting): A power supply does not come to each main circuit/IC. (4)

The power supply of a PANEL system does not operate. (Q9606) (LCD12V)

Checklist

1) The check of the front page POW-UNIT is completed. ••• UR12.5V is output to PD (P9601) (MAIN-UNIT). (If UR12.5V is not output, confirm the POW-UNIT again and repair.)

2) Check that STB3.3V is supplied to pin (V24) of IC3303 (included MICON), and the PS_ON signal “H” is output from (AC11) pin within a MAIN UNIT. (If STB3.3V is not supplied, check IC9605 (BU3.3V-REG), IC9607 (V-DET), and a peripheral circuit.)

3) Refer to attached sheet SYSTEM Block diagram.

4) Attention: The terminal of IC3303 (VCT) cannot be actually checked by hiding oneself, and check it with another terminal of the same line, please.

YES

Is LCD12V supplied to pin (12)-(15) of LP connector (P2604)? YES Replace LCD-CONT-UNIT.

Is LCD12V output from pin (8) of Q9606 (SW)? YES Check the surrounding of LP connector (P2604).

Is UR12.5V input to pin (1) of Q9606 (SW)? NO Check whether UR12.5V is input to pin (1) (2) of PD connector

(P9601).

YES

Is PNL_POW “H” input to pin (4) of Q9606 (SW)? NO Check whether PNL_POW signal outputs “H” from pin (A12) of

YES

Replace Q9606 (SW).

IC3303.

4 – 4

+ 104 hidden pages