Sharp LC-26AM37M, LC-32A37M Schematic

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LC-26/32A37M

SERVICE MANUAL

No. SY8U6LC32A37M

LCD COLOR TELEVISION

LC-26A37M

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-32A37M

CONTENTS

SAFETY PRECAUTION

IMPORTANT SERVICE SAFETY PRE-

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

PRECAUTIONS FOR USING LEAD-FREE

SOLDER ............................................................ii

CHAPTER 1. SPECIFICATIONS

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

CHAPTER 2. OPERATION MANUAL

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

CHAPTER 3. DIMENSIONS

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

CHAPTER 4. REMOVING OF MAJOR PARTS

[1] REMOVING OF MAJOR PARTS ...................4-1

CHAPTER 5. ADJUSTMENT PROCEDURE

[1] ADJUSTMENT PROCEDURE....................... 5-1

CHAPTER 6. TROUBLESHOOTING TABLE

[1] TROUBLESHOOTING TABLE ......................6-1

CHAPTER 7. BLOCK DIAGRAM/OVERALL WIRING DIAGRAM

[1] BLOCK DIAGRAM.........................................7-1

[2] OVERALL WIRING DIAGRAM......................7-2

CHAPTER 8. PRINTED WIRING BOARD

[1] MAIN UNIT ....................................................8-1

[2] R/C, LED/KEY UNIT......................................8-5

[3] POWER UNIT................................................8-6

[4] INVERTER UNIT ...........................................8-9

CHAPTER 9. SCHEMATIC DIAGRAM

[1] SCHEMATIC DIAGRAM................................9-1

Parts Guide

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-26/32A37M

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LC26A37M

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.

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 110 ~ 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.

• 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 non polarized adaptor plug must be used only for the purpose of completing these checks.) Any reading of 0.74 Vrms (this corresponds to 0.5 mA rms AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the monitor to the owner.

DVM

AC SCALE

1.5k ohm 10W

0.15µF

TEST PROBE

TO EXPOSED METAL PARTS

CONNECT TO KNOWN EARTH GROUND

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

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 Lists 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.

LC-26/32A37M

PRECAUTIONS FOR USING LEAD-FREE SOLDER

Employing lead-free solder

• “All 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-26/32A37M

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LC26A37M

CHAPTER 1. SPECIFICATIONS

[1] SPECIFICATIONS

ServiceManual

Item

LCD panel

Resolution

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

TV Function

Viewing angles H : 176º V : 176º

Audio amplifier

Speakers

Terminals Rear Antenna input

OSD language English/Simplified Chinese/Traditional Chinese/Arabic

Power Requirement AC 110—240 V, 50/60 Hz

Power Consumption 88 W (0.9 W Standby) 97 W (0.9 W Standby)

Dimensions

Weight

Operating Temperature 0°C — 40°C

• 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.

TV-Standard PAL: B/G, D/K, I SECAM: B/G, D/K, K/K

Receiving Channel

TV-Tuning System Auto Preset 99 ch

STEREO/BILINGUAL NICAM: B/G, I, D/K A2 stereo: B/G

INPUT1

INPUT2

INPUT3

INPUT4

INPUT 5 S-VIDEO in, VIDEO in, AUDIO in

INPUT 6 (PC input)

OUTPUT AUDIO out

RS-232C 9 pin D-sub male connector

without stand

with stand

without stand 7.5 kg 9.5 kg

with stand 9.0 kg 11.0 kg

Model

VHF/UHF 42.75—866.25 MHz

CATV S1—S41ch (including Hyperband)

LC-26A37M LC-32A37M

26" (640 mm) Advanced Super View & BLACK TFT LCD

1,049,088 pixels (1366 x 768)

10Wx2

10 x 4 cm 2pcs

UHF/VHF 75

HDMI (HDMI input) (480I, 576I, 480P, 576P, 720P/50Hz, 720P/60Hz, 1080I/50Hz, 1080I/60Hz)

AUDIO in, COMPONENT in (480I, 576I, 480P, 576P, 720P/50Hz, 720P/60Hz, 1080I/50Hz, 1080I/60Hz)

15 pin mini D-sub, AUDIO in (common use with INPUT 1) (Ø 3.5 mm jack)

652 (W) x 445 (H) x 123 (D) mm 788 (W) x 519 (H) x 123 (D) mm

652 (W) x 504 (H) x 235 (D) mm 788 (W) x 575 (H) x 235 (D) mm

DIN type

32" (800 mm) Advanced Super View & BLACK TFT LCD

NTSC: M

1 – 1

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LC26A37M

CHAPTER 2. OPERATION MANUAL

[1] OPERATION MANUAL

1. Part Names

TV (Front/Side)

LC-26/32A37M

ServiceManual

POWER (On/Off) button

MENU button

TV/VIDEO button

Channel up( )/ down ( ) buttons

Volume up (+)/ down (-) buttons

Remote control sensor

OPC sensor

TV (Rear)

RS-232C terminal

INPUT 6 (PC) terminals

INPUT 5 terminals

OUTPUT terminals

INPUT 4 terminals

POWER indicator

Antenna input terminal

INPUT 3 terminals

INPUT 2 (HDMI) terminal

INPUT 1 (HDMI) terminal

2 – 1

AC INPUT terminal

LC-26/32A37M

2. Remote Control Unit

1 2

1 POWER (STANDBY/ON)

To switch the power on and off.

2 DISPLAY

Display the channel or input information.

30–9

Set the channel. TELETEXT mode: Set the page.

4 (Flashback)

Press to return to the previous selected channel or external input mode.

5WIDE

Change the wide image mode.

6 FREEZE

Freeze a motion picture on the screen.

7///(Cursor)

Select a desired item on the setting screen.

ENTER

Execute a command.

8 EXIT

Return to the default screen.

10 11

12 13

15 16

9 Colour (Red/Green/Yellow/Blue)

TELETEXT mode: Select a page.

10 AV MODE

Select an audio and video setting.

11 SLEEP

Set the Sleep timer.

0hr.30min. 1hr.00min.

Off

12 (Mute)

Press Mutes sound. Press again Restores sound. Mute will be cancelled after 30 minutes. However, the TV will not suddenly output loud sound as the volume level will be set to 0 automatically. Increase the volume level by pressing VOL +.

13 MPX

Select the sound multiplex mode.

14 VOL + /VOL -

Set the volume. (+)Increasethevolume. ( - ) Decrease the volume.

15 CH /C H

TV input mode: Select the channel. TELETEXT mode: Select the page. ( ) Increase the channel number. ( ) Decrease the channel number.

16 TV/VIDEO (INPUT SOURCE)

Select an input source.

17 PC

Directly select the PC terminal.

18 MENU

Display the menu screen.

19 RETURN

MENU mode: Return to the previous menu screen.

20 (TELETEXT)

Select the TELETEXT mode. (all TV image, all TEXT image, TV/TEXT image)

(Reveal hidden for TELETEXT)

TELETEXT mode: Display hidden characters.

(SUBTITLE for TELETEXT)

To turn the subtitles on and off.

(Hold) TELETEXT mode: Stop updating Teletext pages automatically. Press again to release the hold mode.

(Subpage)

Display the Teletext subpage directly.

(Top/Bottom/Full)

TELETEXT mode: Set the area of magnification.

2hr.30min.

1hr.30min.

2hr.00min.

2 – 2

3. Attaching The Stand

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

• 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.

Screws (x4)

(used in step 3)

Insert the stand base to the stand post on the

bottom of the TV. ( )

Insert and tighten the 4 screws into the 4 holes

on the bottom of the stand base.( )

NOTE

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

Soft cushion

Screw

Screw driver

LC-26/32A37M

2 – 3

LC-26/32A37M

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LC26A37M

CHAPTER 3. DIMENSIONS

[1] DIMENSIONS

ServiceManual

LC-26A37M

504

299

390

652 123 200

567.9

320.6

445

235

Unit: mm

110

200

LC-32A37M

575

334

390

788

699.2

393.8

51959

123 200

200

3 – 1

235

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LC26A37M

CHAPTER 4. REMOVING OF MAJOR PARTS

ServiceManual

[1] REMOVING OF MAJOR PARTS

1. REMOVING OF REAR CABINET

1. Remove the 11 (LC-26A37M)/10 (LC-32A37M) screws [1], 3 screws [2] and detach the Rear Cabinet.

LC-26/32A37M

LC-26A37M

Rear Cabinet

LC-32A37M

Rear Cabinet

4 – 1

LC-26/32A37M

2. REMOVING OF CONNECTORS, SPEAKERS, STAND COVER ASS’Y AND STAND ASS’Y

1. Remove all the connectors from all the PWBs.

2. Remove 2 screws [1] and detach the Speaker-L and Speaker-R.

3. Remove the 4 screws [2], 4 screws [3] and detach the Stand Cover Ass’y.

4. Remove the 4 screws [4] and detach the Stand Ass’y.

POWER PWB Unit

MAIN PWB Unit

KEY PWB Unit

R/C, LED PWB Unit

Speaker-R

䬌䎳䎚䎕䎓䎕䬍

䬌䎳䎚䎕䎓䎔䬍䬌䎦䎱䎚䎖䎓䎕䬍

䬌䎳䎧䬍

䬌䎶䎳䬍

䬌䎳䎚䎓䎓䎔䬍

INVERTER PWB Unit

Speaker-L

䬌䎮䎰䬍

䬌䎵䎤䬍

䬌䎶䎳䬍

䬌䎳䎕䎖䎓䎔䬍

䬌䎳䎛䎕䎓䎔䬍

䬌䎦䎱䎔䬍䬌䎦䎱䎕䬍

䬌䎳䎛䎕䎓䎕䬍

䬌䎶䎳䬍

Stand Cover Ass'y

Stand Ass'y

*The shown is LC-26A37M

4 – 2

3. REMOVING OF PWB UNITS

1. Remove the 1 screw [1] and detach the R/C, LED PWB Unit.

2. Remove the 6 screws [2] and detach the MAIN PWB Unit.

3. Remove the 4 screws [3] and detach the POWER PWB Unit.

4. Remove the 4 screws [4] and detach the INVERTER PWB Unit.

5. Detach the KEY PWB Unit (LC-26A37M). Remove the 1 screw [5] and detach the KEY PWB Unit (LC-32A37M).

6. Remove the 2 screws [6] and detach the SW Bracket.

LC-26/32A37M

(LC-32A37M only)

KEY PWB Unit

MAIN PWB Unit

POWER PWB Unit

3 4

INVERTER PWB Unit

R/C, LED PWB Unit

SW Bracket

Front Cabinet

*The shown is LC-26A37M

4 – 3

LC-26/32A37M

4. REMOVING OF LCD PANEL UNIT

1. Remove the 4 screws [1] and detach the LCD Panel Unit from Front Cabinet.

Front Cabinet LCD Panel Unit

4 – 4

*The shown is LC-26A37M

LC-26/32A37M

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LC26A37M

CHAPTER 5. 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, IC3001and IC1951.

MAIN UNIT: DUNTKF067FM04 (LC-26A37M)

DUNTKF067FM05 (LC-32A37M)

NOTE: [Caution when replacing ICs in the main unit (IC2304/IC1902/IC1922)]

The above ICs are EEPROMs storing the EDID data of HDMI and the monitor microcomputer. Before replacing the relevant part, procure the following parts in which the data have been rewritten.

IC2304 RH-IXC818WJQZS PC EDID IC1902 RH-IXC819WJQZS HDMI EDID IC1922 RH-IXC820WJQZS HDMI EDID

2. After replacing the LCD panel or LCD control PWB, check PANEL_SIZE in the following procedure.

1) Enter the process adjustment mode.

2) Use the cursor keys / and CH / of R/C to select the item [Inch Setting] on the page 2/11.

3) Verify that the panel size is displayed.

4) If the size doesn't match, select the values of the panel size with the Vol +/- keys.

5) After selection in Step 4), press the ENTER key, and it is completed with OK displayed.

3. After replacing the LCD panel, adjust the VCOM in the following procedure.

1) Enter the process adjustment mode.

2) Use the cursor keys / and CH / of R/C to select the item [ VCOM ADJ] on the page 11/11.

3) Press the ENTER key to verify that the adjustment pattern is displayed.

4) Use the +/- keys of VOL of R/C to adjust the flicker in the center of the screen to minimum.

5) When the optimal state is achieved in Step 4, press the ENTER key to turn the pattern to OFF.

5 – 1

LC-26/32A37M

2. Entering the adjustment process mode

There are 2 ways as follows:

• After power-on, press “ADJUSTMENT PROCESS” key of the remote control.

• During servicing.

While holding down the TV/VIDEO and DOWN keys at the same time, set the Power switch to ON. (“K” standing for inspection process mode is

displayed in the upper left position of the screen.) → Press the Channel DOWN and Volume DOWN keys at the same time. (The adjustment process mode screen appears.)

To cancel it, turn off the power using the Power switch or remote control.

3. Remote controller key operation and description of display in adjustment process mode.

1. key operation

Remote controller key Main unit key Function

CH ( / ) VOL (+ / –) VOL (+ / –) Changing a selected line setting (+1/-1) Cursor ( / )

Cursor ( / ) TV/INPUT button on remote controller OK —————— Executing a function

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

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

—————— Turning a page (PREVIOUS/NEXT) —————— Changing a selected line setting (+10/-10) TV/INPUT button Input source switching (toggle switching)

(TV→INPUT1→INPUT2→INPUT3→INPUT4→INPUT5→INPUT6)

2. Description of display

(1) Current page/Total pages (3) Currently selected input

(4) Current colour TV system

(2) Current page title

1/11

Main Version Checsum Value TCON Version TEMP SENSOR

NORMAL STANDBY CAUSE ERROR STANDBY CAUSE

[INFO] TV AUTO XX:ASIA

LEW07 01.XX (XX/XX/XXX)

XX XX XX XX [1] 0 [2] 0 [3] 0 [4] 0 [5] 0

00H 00M 00H 00M 00H 00M 00H 00M 00H 00M

(5) Inch/Destination

Adjustment process menu header

(7) Parameters

5 – 2

LC-26/32A37M

4. 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.)

1/11 [INFO]

1 Main Version JraAS XXX(XX/XX/XX) Main microprocessor version 2 Checksum Value XX DTV microprocessor version 3 TCON Version XX DTV micr oprocessor-Loader version 4 TEMP SENSOR xxxxxx 5 NORMAL STANDBY CAUSE RC_STANDBY 6 ERROR STANDBY CAUSE [1] 00H 00M Error standby cause Total operating time before error

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

2/11 [INIT]

1 Factory Init [HONG KONG/CHINA/ASIA] Initialization to factory settings execution 2 Inch Setting XX Inch present setting 3 Public Mode OFF/ON HOTEL MODE flag setting 4 Center Acutime xxH xxM Main operating hours 5 RESET OFF/ON Main operating hours reset 6 Backlight Acutime xxH xxM Backlight operating hours 7 RESET OFF/ON Backlight operating hours reset 8 Picture Read Pos X 0-xxx x-axis setting of picture data 9 Picture Read Pos Y 0-xxx y-axis setting of picture data

10 Picture Read ON/OFF Start/stop of picture data

3/11 [PAL.SECAM.N358]

1 RF-AGC ADJ ENTER RF-AGC auto adjustment execution 2 PAL+TUNER ADJ ENTER PAL TUNER auto adjustment execution 3 PAL ADJ ENTER PAL auto adjustment execution 4 TUNER ADJ ENTER TUNER auto adjustment execution 5 CONTRAST SD 32 PAL contrast adjustment 6 SECAM CB OFFSET 1 SECAM offset adjustment 7 SECAM CR OFFSET 1 SECAM offset adjustment 8 TUNER A DAC 32 TUNER DAC adjustment 9 RF AGC 16 RF AGC adjustment

4/11 [COMP 15K]

1 COMP 15K ADJ ENTER COMP15K auto adjustment execution (No use) 2 COMP 15K CONTRAST 40 Contrast adjustment

5/11 [HDTV]

1 HDTV CONTRAST 41 HDTV Contrast adjustment

6/11 [SMPTE]

1 RF-AGC ADJ ENTER RF-AGC auto adjustment execution 2 PAL-AGC ADJ ENTER PAL AGC auto adjustment execution (No use) 3 PAL ADJ ENTER PAL auto adjustment execution 4 TUNER ADJ ENTER TUNER auto adjustment execution 5 CONTRAST SD 30 PAL contrast adjustment 6 SECAM CB OFFSET 1 SECAM offset adjustment 7 SECAM CR OFFSET 1 SECAM offset adjustment 8 TUNER A DAC 36 TUNER DAC adjustment 9 RF AGC 16 RF AGC adjustment

7/11 [M GAMMA INFO]

1 M GAMMA IN 6 928 W/B adjustment, gradation 6 input setting 2 M GAMMA WRITE OFF/ON EEP writing of adjustment values 3 M GAMMA RESET OFF/ON Initialization of adjustment values

8/11 [M GAMMA 1-3]

1 M GAMMA R 2 0 W/B adjustment, gradation 2R adjustment value 2 M GAMMA G 2 0 W/B adjustment, gradation 2G adjustment value 3 M GAMMA B 2 0 W/B adjustment, gradation 2B adjustment value 4 M GAMMA WRITE OFF/ON EEP writing of adjustment values

9/11 [M GAMMA 4-6]

1 M GAMMA R 6 0 W/B adjustment, gradation 6R adjustment value 2 M GAMMA G 6 0 W/B adjustment, gradation 6G adjustment value 3 M GAMMA B 6 0 W/B adjustment, gradation 6B adjustment value 4 M GAMMA WRITE OFF/ON EEP writing of adjustment values

5 – 3

LC-26/32A37M

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

10/11 [ETC]

1 EEP CLEAR OFF/ON Clear of all adjustment value 2 EEP CLEAR B OFF/ON Clear of adjustment value of B mode 3 STANDBYCAUSE RESET OFF/ON Reset of STANDBY CAUSE 4 AUTO INSTALLATION SW 0/1 1: * * * 0: * * * 5OPTION 0 6 COUNTRY HONG KONG/CHINA/ASIA Destination setting 7 L ERR RESET 0 LAMP ERR RESET Initializatio of L_ERR 8 L ERR STOP 0/1 LAMP ERR Inhibit L_LRR detection 9 I2C-OFF ENTER I2C DATA execution

11/11 [COM-BIAS]

1VCOM ADJ 63 2 TEST PATTERN 0

5. Special features

* ERROR STANDBY CAUSE (Page 1/11)

The total time when the unit enters the standby due to operational error and cause of error are recorded on EEPROM as much as possible. The values can be used to locate the fault for repair.

* EEP CLEAR (Page10/11)

Clear of process adjustment EEP value.

6. Lamp error detection

1. Function

This LCD colour TV set incorporates a lamp error detection feature that automatically turns off the power for safety under abnormal lamp or lamp circuit conditions. If by any chance anything is wrong with the lamp or lamp circuit or if the lamp error detection feature is activated for some reason, the following will result.

1) The powe r is interrupted in about 6 seconds after it is turned on. (The power LED on the front of the TV set turns red from green and keeps blinking in red: ON for 250 ms and OFF for 1 sec.).

2) If the above phenomenon 1) occurs 5 times consecutively, it becomes impossible to turn on the power. (The power LED remained red).

2. Measures

1) Checking with lamp error detection OFF Enter the adjustment process mode, referring to 1. Entering and exiting the adjustment process mode. If there is a problem with the lamp or lamp circuit, the lamp will go out. (The power LED is green.) Then, you can check the operation to see if the lamp and lamp circuit are in trouble.

2) Resetting the lamp error count After the lamp and lamp circuit are found out of trouble, reset the lamp error count. If a lamp error is detected five consecutive times, the power

cannot be turned on. Using the cursor (UP/DOWN) key, move to the cursor to [LAMP ERROR RESET], Line 8 on adjustment process mode service page 10/11. With the cursor (LEFT/RIGHT) keys, select the [LAMP ERROR RESET] value. Finally press the cursor (ENTER) ey s to reset the value to “0”.

Table of contents of adjustment process mode Page 10/11.

[ETC]

EEP CLEAR OFF EEP CLEAR B OFF STANDBYCAUSE RESET OFF AUTO INSTALLATION SW OPTION COUNTRY L ERR RESET

HONG KONG

Resetting to "0" L ERR STOP 0 I2C-OFF ENTER

5 – 4

LC-26/32A37M

7. Standby Cause Function

This model is equipped with a STANDBY CAUSE FUNCTIONS which stores the cause of why the unit is turned off and displays it on adjustment process mode.

1. NORMAL STANDBY CAUSE

ERROR CODE here indicates cause of standby in normal operation or Function of the Unit. No display when the unit is turned off with R/C. Only the latest cause is indicated.

2. ERROR STANDBY CAUSE

ERROR CODE here indicates cause of Error in the unit. It also indicates accumulated operating times of the unit. The last five histories are displayed.

1)-5) five histories 1) is the latest. When there is no error, error code is ‘0’ and no characters appear.

• NORMAL STANDBY CAUSE Display Code Indication Description

1 RC_STANDBY in the cause of “Remote Controler OFF” 6 NO OPERATION in the cause of “NO OPERATION OFF” 7 NO SIGNAL in the cause of “NO SIGNAL OFF” 8 PC_MODE1 in the cause of “PC(INPUT6) POWER MANAGEMENT MODE1” 9 PC_MODE2 in the cause of “PC(INPUT6) POWER MANAGEMENT MODE2” a SLEEP_TIMER in the cause of “SLEEP TIMER” b RS232C in the cause of “RS232C COMMAND (POWR)”

• ERROR STANDBY CAUSE Display Code Indication Description

1a TEMP_ERROR TEMPERATURE ERROR 1b LAMP_ERROR LAMP ERROR

5 – 5

LC-26/32A37M

8. Video signal adjustment procedure

* The adjustment process mode menu is listed in Section 5.

1. Signal check

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

• Composite signal PAL : 0.7Vp-p ± 0.02Vp-p (Pedestal to white level)

• RGB signal : 0.7Vp-p ± 0.02Vp-p

• 15K component signal (50 Hz) : Y level : 0.7Vp-p ± 0.02Vp-p (Pedestal to white level) : PB, PR level : 0.7Vp-p ± 0.02Vp-p

2. Entering the adjustment process mode

1) Enter the adjustment process mode according to Section 3.

3. RF AGC adjustment

Adjustment point Adjustment Conditions Adjustment procedure

1 Setting [Signal]

PAL Sprit Field Colour Bar RF signal UV

[Terminal] TUNER

• Feed the PAL Sprit Field colour bar signal to TUNER. Signal level: 55 dB µV +1dB, -1dB (75Ω LOAD)

[E-12CH]

2 Auto adjustment

performance

Adjustment process Page3

㸡100% white

Bring the cursor on [ RF AGC ADJ] and press [OK] [***OK***] appears when finished.

5 – 6

LC-26/32A37M

9. White Balance Adjustment

Adjustment gradation values (IN) appear on page 7/11 of process adjustment, and adjustment initial values (offset value) appear on pages 8/11 and 9/11. For white balance adjustment, adjust the offset values on pages 8/11 and 9/11.

[Condition of the unit for inspection] Modulated light: MAX (+8) [Adjustment reference device] Minolta CA-210 [Adjustment] Check that the values on page 7/11 of process adjustment are set as below. If not, change them accordingly.

M GAMMA IN 2 320 M GAMMA IN 6 928

1) Display the current adjustment status at point 6. (Page 7/11 of process adjustment) The display for checking the adjustment status is toggled by pressing the “6” button on the remote control. (Normal OSD display → “6” → display for check (OSD disappears) → “6” →normal OSD display → • • •)

2) Read the value of the luminance meter.

3) Change M GAMMA R6/M GAMMA B6 (Adjustment offset value) on page 9/11 of process adjustment so that the values of the luminance meter approach x = 0.272 and y = 0.277.

(Basically, G is not changed. If adjustment fails with R and B, change G. When G is lowered, the weaker of R and B must be fixed.)

4) If G is changed in step 3), change the values of M GAMMA G2 on pages 8/11 and 9/11 of process adjustment as follows. When not changed, go to step5).

Offset value of M GAMMA G2 = (Offset value of M GAMMA G6) * (320/928)

5) Display the adju stment status of the current point 2. (Each time the “2” button on the remo te control is pressed, the adjustment status check display is toggled.)

(Normal OSD display → “2” → Check display (OSD disappears) → “2” → Normal OSD display → • • •) Change M GAMMA R5/M GAMMA B2 (adjustment offset value) on page 9/11 of process adjustment so that the values of the luminance meter

approach x = 0.272 and y = 0.277.

[Adjustment reference standard value]

Adjustment spec ±0.004 Inspection spec ±0.006 (point 1) Adjustment spec ±0.002 Inspection spec ±0.004 (Excluding the above-mentioned)

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10. Adjusting procedure by us e of [RS- 23 2C ]

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 unit with the RS-232C cable connected.

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

4) Make the following settings.

Baud rate 9,600 bps Data LENGTH 8 bit Parity bit None Stop bit 1 bit Flow control None

5) If the settings are correct, the terminal software indicates "ERR" against pressing of the "ENTER" key.

6) After the settings are done correctly, it is possible to make an adjustment by typing in the command shown in the table below and pressing the "ENTER" key on the keyboard.

7) Command entry is successful if the terminal software indicates "OK" when the "ENTER" is pressed. If "ERR" is shown, retry to enter the command.

8) Send the process mode switching command to switch from the RS232C operation mode to the process mode. KRSW0001: "ERR" is returned. KKT10037: When "OK" is returned, the process mode becomes active. When "ERR", start over from KRSW0001.

9) Send each adjustment command.

RS-232C command list

Command Function Remarks

KYOF0000 Remote control disabled OSDS0001 OSD display inhibited SBSL0016 Light control level MAX MSET0001 Background adjustment start MSET0004 Initialization of adjustment value LEV60928 Gradation 6 (928-gradation adjustment) MG6G **** Adjustment of G of gradation 6 0000 ~4095 MG6R **** Adjustment of R of gradation 6 0000 ~ 4095 MG6B **** Adjustment of B of gradation 6 0000 ~ 4095 LEV20352 Gradation 2 (352-gradation adjustment) MG2G **** Input of G of 2 Calculated value MG2R **** Input of R of 2 0000 ~ 4095 MG2B **** Input of B of 2 0000 ~ 4095 MSET0003 Writing of adjustment value

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11. Initialization to factory settings

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

After adjustments, exit the adjustment process mode. To exit the adjustment process mode, unplug the AC power cord from the outlet to forcibly turn off the power. 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)

(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 Forcibly turn off the power

(See to below caution)

• Enter the adjustment process mode.

• Move the cursor to [Factory Init] on page 2/11.

• Use the R/C key to select a destination [HONG KONG/CHINA/ASIA]. And, press the [OK] key.

• “EXECUTING...” appears and initialization starts.

• After a while, “*** OK ***” appears and the setting is complete.

NOTE: Never turn the power off during initialization. When performing factory settings (while displaying page 2 of adjustment

process), confirm that the item “Inch Setting” or the panel size displayed in the upper right corner corresponds to each panel size.

The following settings will be back to their factory ones.

1. User settings

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

3. Maker option setting

4. Password data

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12. Public Mode (Hotel Mode)

1. How to Enter in the Public Mode (Hotel Mode).

Turn on the power and enter in the Adjustment Process mode as usual. In the [INIT], Page 2/11 of Service, turns ON the Public Mode option. Turn off TV by pressing Main Power switch. While pressing “VOL+” and “INPUT” keys at the same time, press Main Power switch for more than 2 seconds. Then, when you are asked for the password, enter “027”. After this sequence the TV will turn on showing the Public Mode setting screen as follows:

Is possible to select each item of function by pressing cursor UP/DOWN keys on the remote control or CH( )( ) keys on the LCD TV. (Except DTV)

The setting position of each item of functions is made by pressing cursor RIGHT/LEFT keys on the remote control or VOL (+) / (-) keys on the LCD TV.

Select EXECUTE position after you set all function, and press cursor RIGHT/LEFT keys on the remote control or VOL (+) / (-) keys on the LCD TV for confirmation.

2. Public Mode Settings.

1) POWER ON FIXED [VARIABLE FIXED] When it is set to “FIXED” the TV is impossible to be switch off by Main Switch or Remote Control.

2) MAXIMUM VOLUME [0 60] Is possible to set the maximum volume at limited level.

3) VOLUME FIXED [VARIABLE FIXED] Is possible to fix the sound volume at limited level. When “FIXED” is selected the sound volume before limited is fixed.

4) VOLUME FIXED LEVEL [0 60] If “FIXED” has been selected, is possible to set a fixed volume at the level that is chosen.

5) RC BUTTON [RESPOND NO RESPOND] If “NO RESPOND” is selected, the remote control keys are inoperative.

6) PANEL BUTTON [RESPOND NO RESPOND] If “NO RESPOND” has been selected, the set’s keys remain deactivated (Except POWER key).

7) MENU BUTTON [RESPOND NO RESPOND] If “NO RESPOND” has been selected, “MENU” key, of remote control, is inoperative.

8) ON SCREEN DISPLAY [YES NO] If “NO” has been selected, the On Screen Display does not appear.

9) INPUT MODE START [NORMAL → TV (X) →DTV→ INPUT1 → INPUT2 → INPUT3 → INPUT4 → INPUT5] When any other item than “NORMAL” has been selected, the sets will start in a selected input mode at the next power-on.

10)INPUT MODE FIXED [VARIABLE → FIXED] “FIXED” has been selected, any channels and input modes other than those selected at the start mode cannot be picked up.

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11)RESET Cancel all Public Mode settings. (It returns to the factory settings)

12)EXECUTE Select this item, and press cursor RIGHT / LEFT keys on the remote control or VOL (+) / (-) keys on the LCD TV for confirmation the functions

settings.

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

LC26A37M

CHAPTER 6. TROUBLESHOOTING TABLE

ServiceManual

[1] TROUBLESHOOTING TABLE

The sound is not emitted from the speaker though the picture has come out

No sound output in all modes?

Is the audio signal output of pins (28/L) and (27/R) of IC3001 (MAIN_MICON) normal?

YES

Is the audio signal input to pin (3/L) and (7/R) of IC2701 (AMP)?

YES

Is MUTE circuit [MUTE_SP_LINE,RESET_N_LINE] normal? (Q2701, etc.)

YES

Is the audio signal output of pins (3,4)(L-Ch) and (6,7)(R-ch) of P2701 (AOUDIO-CONNECTOR) normal ?

Check IC3001 and its peripheral circuits

Check the line between IC3001 and IC2701

Check the MUTE_SP_LINE and RESET_N_LINE

Check IC2701 and its peripheral circuits

YES

Check Speaker (right and left) and wire harness

No sound (during the reception of TV (Analog) broadcasting)

Does not the sound go out through the picture has come out when UHF/VHF is receive?

Is the SIF signal output from pin (14) of TUNER (TU201) replace as required

YES

Is the SIF signal sent to pins (31) of IC3001 (MAIN_MICON)?

YES

Refer to" No sound output in all modes".

No sound from external input devices (1)

Does not the sound of the audio signal input to INPUT1 / INPUT2 (HDMI) go out?

Is the picture of the signal input from INPUT1/ INPUT2 displayed? to (INPUT1/INPUT2) go out?

Check the tuner and its peripheral circuits

Check line between TU201 and IC3001

Refer to " Does not the picture of the HDMI signal input

YES

Is the HDMI_SCK/WS/SD0 audio output from pin (86) , (85),(84) of IC1915 (HDMI RECEIVER) to pin (39), MICON) and their peripheral circuits (40), (38) of IC3001 (MAIN_MICON)?

YES

Refer to "No sound output in all modes".

Check the line between IC1915 and IC3001 (MAIN

6 – 1

No sound from external input devices (2)

Does not the sound of the audio signal input to INPUT5 (J504) go out? Does not the sound of the audio signal input to INPUT3 (J507) go out? Does not the sound of the audio signal input to INPUT4 (J501) go out?

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J504 Is the audio signal properly sent to pin (5) (AIN3L) and (3) (AIN3_R) of (CVBS_IN) J504?

YES

J507 Is the audio signal properly sent to pin (5) (AIN1_L) and (3) (AIN1_R) of (COMP1_AUDIO_IN) J507?

YES

J501 Is the audio signal properly sent to pin (5) (AIN2_L) and (3) (AIN2_R) of (COMP2_AUDIO_IN) J501?

YES

J504 Is the audio signal properly sent to pin (14) (AIN3_L) and (15) (AIN3_R) of IC3001 (MAIN_MICON)?

YES

J507 Is the audio signal properly sent to pin (10) (AIN1_L) and (9) (AIN1_R) of IC3001(MAIN_MICON)?

YES

Check the setting of an external input device that connects of J504

Check the setting of an external input device that connects of J507

Check the setting of an external input device that connects of J501

Check the line between J504 and IC3001 (MAIN_MICON)

Check the line between J501 and IC3001 (MAIN_MICON)

J501 Is the audio signal properly sent to pin (12) (AIN2_L) and (11) (AIN2_R) of IC3001(MAIN_MICON)?

YES

Refer to "No Sound output in all modes"

Check the line between J501 and IC3001 (MAIN_MICON)

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No sound from external input devices (3)

Does not the sound of the audio signal input to INPUT3 (J506) go out? Does not the sound of the audio signal input to INPUT4 (J503) go out?

J506 Is the audio signal properly sent to pin (5) (VIN15_L) and (7) (VIN17_R) of (COMP_1_IN) J506? that connects of J506

YES

J503 Is the audio signal properly sent to pin (5) (VIN11_L) and (7) (VIN13_R) of (COMP_2_IN) J503? that connects of J503

YES

J506 Is the audio signal properly sent to pin (178) (VIN15_L) and (176) (VIN17_R) of IC3001(MAIN_MICON)? (MAIN_MICON)

YES

J503 Is the audio signal properly sent to pin (181) (VIN11_L) and (179) (VIN13_R) of IC3001(MAIN_MICON)? (MAIN_MICON)

YES

Refer to "No Sound output in all modes"

Check the setting of an external input device

Check the line between J506 and IC3001

check the line between J503 and IC3001

The Audio Signal not output (5)

No audio signal output from AUDIO_OUTPUT terminal.

Is audio signal output to pin (4/R-ch) and (2/L-ch) of audio output terminal J502

YES

Is audio signal sent to pins (25) (AOUT_R) and (26) (AOUT_L)of IS3001 (MAIN_MICON)? (MAIN_MICON)

YES

Check IC3001 (MAIN_MICON) and its peripheral circuit

Check the connection of J502 and external devices.

Check the line between J502 and IC3001

6 – 3

No picture on the display (1)

The picture doesn't appear in all modes.

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Is the LVDS signal output from IC3001(MAIN_MICON)? LVDS0_P/N(140/141), LVDS1_P/N(137/138), LVDS2_P/N(134/135), LVDS3_P/N(128/129), LVDS4_P/N(125/126), LVDS_CP/CN(131/132)

YES

Is the LVDS signal input to IC8103(LCD_CONTROL)? A0+/-(165/164), A1+/-(167/166), A2+/-(169/168), and IC8103 A3+/-(189/188), A4+/-(191/190), ACK+/-(187/186)

YES

Is the control signal of LCD controller normal?

YES

Is VCC_3.3V, VCC_2.5V or VCC_1.5V supplied to IC8103? _POWER_SUPPLY) and the peripheral

YES

Are the video signals BR/BG/BB (0_P/M-3_PM), FR/ FG/FB(0_P/M-3_M/P) and the CLK signals (BCLK_P/ M, FCLK_P/M) output from IC8103?

YES

Are BR/BG/BB(0_P/M-3_P/M), BCLK(P/M) input to connector SC8201 and FR/FG/FB(0_P/M-03_P/M), FCLK(P/M) input to connector SC8202?

Check IC3001 and its peripheral control circuits.

Check the line between IC3001 (MAIN_MICON)

Check the control signal R/L_LINE, U/D_OUT_LINE FRAME_LINE, BANK_SEL_LINE, TEMP1/2/3_LINE QS_EN_LINE, etc.

Check if IC8402(MULTI_CHANNEL_SYSTEM

power supply circuit are normal.

Check IC8103 and its peripheral circuits.

Check the line between IC8103 and CN8201/CN8202

YES

Are the gradiation signals (VH/VL_247, 191, 159, 63, 31, 0) normal sent from IC8201( GLAY_LEVEL peripheral circuits and IC8103 is normal. _GENERATION) to CN8201/CN8202? (Each line of DAC_CLK/DATA/LATCH)

YES

Check the connectors CN8201/CN8202 and LCD Panel

Check IC8201 and the communication between its

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No picture on the display (2)

Does not the picture come out when UHF/VHF is received?

Is the video signals (VIN1) output form pin (17) of TUNER (TU201)? named TU201 and IC3001 (MAIN_MICON)

YES

Is the video signal (VIN1) sent to pin (191) of IC3001 (MAIN_MICON)?

YES

Refer to "The picture doesn't appear in all modes."

No picture on the display (3)

Does not the picture of the composite video signal input go out?

Is CVBS signal output from pin (8) in input terminal J504 to pin (188) IC3001 (MAIN_MICON)?

Check whether I2C is normal accessed between

Check the line between TU201 and IC3001

Check the line between J504 and IC3001

YES

Refer to "The picture doesn't appear in all modes"

No picture on the display (4)

Does not the picture of the Y/C video signal (S-video) go out?

Is Y/C signal input from pin (3)/Y and (4)/C of input terminal J 505

YES

Is Y/C signal output from pin (3)/Y and (4)/C connect to pin (184)/VIN7 and (187)/VIN6 of IC3001 (MAIN_MICON) (MAIN_MICON)

YES

Is the Y/C video signal detection function SV1JSW signal from pin (6) of the input terminal J505 normal?

YES

Is the SV1JSW signal input to pin (201) of IC3001 (MAIN_MICON)?

Check the S_IN (J505) line and its peripheral circuits

Check the line between J505 and IC3001

Check J505 or peripheral circuits.

Check the line between J505 and IC3001

YES

Is Y/C signal sent to pins (184)/Y and (187)/C of IC 3001 (MAIN_MICON)? (MAIN_MICON)

YES

Refer to "The picture doesn't appear in all modes"

Check the line between J505 nad IC3001

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