Sharp LC22SV2E Service Manual

LC-22SV2E

SERVICE MANUAL

S02R9LC22SV2E

LCD COLOUR TELEVISION

MODEL

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

CONTENTS

» IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................... 2

» SPECIFICATIONS ................................................................................................................................... 4

» OPERA TION MANUAL ............................................................................................................................ 5

» DIMENSIONS .......................................................................................................................................... 7

» REMOVING OF MAJOR PARTS............................................................................................................. 8

» ADJUSTING PROCEDURE OF EACH SECTION .................................................................................11

» TROUBLE SHOOTING TABLE ............................................................................................................. 20

» CHASSIS LAYOUT ................................................................................................................................ 26

» BLOCK DIAGRAM................................................................................................................................. 28

» OVERALL WIRING DIAGRAM .............................................................................................................. 30

» DESCRIPTION OF SCHEMATIC DIAGRAM ........................................................................................ 32

» SCHEMATIC DIAGRAM ........................................................................................................................ 33

» PRINTED WIRING BOARD ASSEMBLIES........................................................................................... 56

» REPLACEMENT PARTS LIST .............................................................................................................. 67

» PACKING OF THE SET......................................................................................................................... 83

LC-22SV2E

Page

SHARP CORPORATION

LC-22SV2E

IMPORTANT SERVICE SAFETY PRECAUTION

Service work should be perfomed 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 ONL Y WITH SAME TYPE F3701 (T1.6AL, 250V), F3702 (T1.6AL, 250V), F6551 (T1.25AL,

A V

250V), F6552 (T1.25AL, 250V), F6553 (T1.25AL, 250V) AND F6554 (T1.25AL, 250V) FUSE.

BEFORE RETURNING THE RECEIVER (Fire & Shock Hazard)

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

1. 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.

2. 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.

3. 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, and connect the DC power cable into the receiver's DC jack. (Do not use an isolation transformer for this test).

• Using two clip leads, connect a 50k 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 resisor.

• 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 0.75V peak (this corresponds to 0.5 milliamp. peak 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

50k ohm

10W

0.15 µF

TEST PROBE

TO EXPOSED METAL PARTS

CONNECT TO KNOWN EARTH GROUND

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

SAFETY NOTICE

Many electrical and mechanical parts in LCD 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

and shaded areas in the

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.

components having such features are identified by “ å”

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

Replacement Parts Lists

and

LC-22SV2E

Precautions for using lead-free solder

1 Employing lead-free solder

"Inverter PWB" 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.

2 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 40ºC, we recommend you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldening bit, contact our service station or service ranch in your area.

3 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 wettabillty, 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 excoeded, remove the bit from the PWB as soon as you conurm the steady soldering condition. Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to tum 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.

Becareful 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-22SV2E

SPECIFICATIONS

Item 22" LCD COLOUR TV, Model: LC-22SV2E LCD panel 22" Advanced Super View & BLACK TFT LCD Number of dots 1,229,760 dots (854 480 3 dots) Video colour system PAL/SECAM/NTSC 3.58/NTSC 4.43/PAL 60 TV TV-Standard (CCIR) B/G, I, D/K, L Function Receiving VHF/UHF E2-E69 ch, I21-I69 ch, IR A-IR Jch, F2-F10 ch

Channel CATV ~ Hyper Band TV-Tuning System Auto preset 200 ch.

STEREO/BILINGUAL NICAM, IGR Brightness 430 cd/m Lamp life 60,000 hours Viewing angles H: 170 V: 170 Audio amplifier 2.5 W 2 Speakers 5 cm 2 pcs Terminals AV-IN 1 SCART (Av in, RGB in, TV out)

AV-IN 2 S-VIDEO, VIDEO, AUDIO

OUT AUDIO

Antenna 75 Din Type

Headphones 3.5 mm jack (Rear) OSD language English/German/French/Spanish/Italian/Swedish/Dutch Power requirement DC 13 V, AC 110 V – 240 V, (50/60 Hz) Power Consumption 62 W (1.0 W at Standby) (Method IEC60107) : AC 230 V (with AC Adapter)

53 W (Method IEC60107) : DC 13 V Weight 9.3 kg w/o accessories Accessories Operation Manual, Remote Control, Batteries ( 2), AC adapter, AC cord,

Cable clamps ( 2)

Specifications are subject to change without prior notice.

OPERATION MANUAL

Part Names of Main Unit

Controls

Note:

• TV/VIDEO CH(

)/( ) Volume (–)/(+) MENU

control.

TV/VIDEO

Volume (–)/(+)

POWER/STANDBY indicator

Remote sensor window

Remote sensor indicator

Upper control panel

CH (

)/( )

TV/VIDEO

(MAIN POWER)

OPC sensor window

Speaker

OPC (Optical Picture Control)

indicator

Speaker

Terminals

-I

DIO

AV-

INPU

Carrying handle

Rear View

POWER INPUT DC13V

AV-IN 1

(21pin Euro-SCART)

S-VIDEO

VIDEO

AUDIO (L)

AUDIO (R)

AV-IN 2

Antenna

AUDIO OUT (L)

AUDIO OUT (R)

Headphones

To change the vertical angle of

the LCD TV set, tilt the screen

up to 5 degrees forward or 10

degrees backward. The TV set

can also be rotated 25 degrees

to right and left. Please adjust

the angle so that the TV set can

be watched most comfortably.

A red indicator blinks when the TV set

receives the remote control signal.

A green indicator lights when “Brightness” is

set to “Auto”.

, , and

Fundamentally, this operation manual provides a description based on operation using the remote

on the main unit have the same functions as the same buttons on the remote control.

A green indicator lights when the power is

on and a red indicator lights when in the

standby mode (the indicator will not light

when the main power is off).

How to adjust the angle

Tilt the display by grabbing onto

the carrying handle while securely

holding down the stand with your

other hand.

LC-22SV2E

Part Names of Remote Control

TET

SUBTITLE

HOLD

(Mute)

Yellow,

Timer function Menu

Cyan, Status Display

TV/VIDEO

Channel Select

Volume (+)/(

)

(Flashback)

Red, Picture Menu

Upwards/ Downwards

Selection, zoom display

function

END

TEXT

(Power)

SOUND

REVEAL

Right / Left Selection

SUBPAGE

ROTATE

WIDE

Green, Sound Menu

CH ( )/( )

Installing Batteries in the Remote Control

123

■

Caution!

Precautions regarding batteries

■

Preparation

■

Using Remote Control

■

Cautions regarding use of remote control

■

Displays the Teletext

Subtitle directly.

Temporarily holds the

current Teletext page.

Selects the wide image mode.

Switches the sound

mode.

Returns to the previous

channel.

SOUND

EVE

SUBPAGE

EVE

SUBPAGE

TEXT

WIDE

TEXT

WIDE

MENUSOUND

Displays the Teletext mode

screen.

Displays hidden information

such as solutions to riddles

and puzzles.

Displays the Teletext

Subpage directly.

Rotates the display in every

direction.

(Teletext mode)

Returns to normal screen.

Switches the sound on and off.

Turns on the status display

when the menu is not

displayed.

Displays the TV menu.

Displays previous/next page.

(Teletext mode)

Switches the input source

between AV1, AV2 and

TV mode.

TV/VIDEOTV/VIDEO

Open the battery cover.

Before using the LCD TV set for the first time, install the two R-03 (“AAA” size, UM/SUM-4) batteries supplied in the remote

control. When the batteries become depleted and the remote control fails to operate, replace the batteries with new R-03

(“AAA” size, UM/SUM-4) batteries.

Insert two R-03 (“AAA” size,

UM/SUM-4) batteries.

Replace the battery cover.

Slide the cover while

pressing the ( ) part.

Position the positive and

negative ends of the

batteries as indicated in

the compartment.

Engaging the lower

claw with the remote

control, close the

cover.

Improper use of batteries can result in a leakage of chemicals and/or explosion. Be sure to follow the instructions below.

Place batteries with their terminals corresponding to the (+) and (–) indications.

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

Do not mix old and new batteries. Mixing old and new batteries can shorten the life of new batteries and/or cause old

batteries to leak chemicals.

Remove batteries as soon as they are depleted. Chemicals that leak from batteries can cause a rash. If chemical

leakage is found, wipe it off with a cloth.

The batteries supplied with the product may have a shorter life expectancy due to storage conditions.

If the remote control is not to be used for an extended period of time, remove the batteries from the remote control.

Use the remote control by pointing it towards the remote sensor

window of the main unit. Objects between the remote control and

sensor window may prevent proper operation.

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

expose the remote control to liquids, and do not place it in an area

with high humidity.

Do not install or place the remote control under direct sunlight. The

heat may cause deformation of the unit.

The remote control may not work properly if the remote sensor

window is under direct sunlight or strong lighting. In such a case,

change the angle of the lighting or main unit, or operate the remote

control closer to the remote sensor window.

Remote sensor indicator

OPC indicator

Power/Standby indicator

OPC sensor window

Remote sensor window

OPC

Unit: mm

180.6

367

462

739

100

43.9

AUDIO OU T

AV-IN 1

RGB

AV-IN 2

S-VIDEO

VIDEO

AUDIO

POWER

INPUT

DC13V

59.5

72.5

420

165.4 250

490.62

268.32

108

TV/VIDEO

DIMENSIONS

LC-22SV2E

REMOVING OF MAJOR PARTS

1. Remove the two terminal covers.

2. Remove the table stand fixing screws (4 pcs.).

3. Remove the cabinet B fixing screws (17 pcs.).

4. Remove the cabinet B after opening from the direction of an arrow.

5. Remove the reinforcement angle fixing screws (4 pcs.).

6. Detach the connector from each PWB.

Control Panel (Top Cover)

Cabinet A

Cabinet B

Terminal Cover (S)

Terminal Cover (L)

Stand

SC4561 (GD)

SC4902

(RM)

(GA)

P3701

SC4901

P3504

(KK)

(GB)

P3702

P130(KK)

(MC)

(MA)

SC4701

SC1401

SC3501

(MA)

(MC)

Main PWB

P3502

(RM)

P3503

Operation PWB

Digital PWB

(ME)

(MB)

SC402

P4501

SC2202

P3706

(ME)

(MB)

P3705(PF)

Reinforcement Angle

Inverter PWB

P706

(PF)

P6551

P6552

P6553

P6554

7. Remove the top cover fixing screws (2 pcs.).

8. Remove the control PWB fixing screws (2 pcs.).

9. Remove the digital PWB fixing screws (4 pcs.).

10. Detatch the chassis frame cover fixing hooks (5 pcs.).

11. Remove the 21-pin terminal fixings screws (2 pcs.).

12. Remove the analog PWB fixing screws (3 pcs.).

13. Remove the inverter PWB fixing screws (4 pcs.).

14. Remove the R/C, LED PWB fixing screws (2 pcs.).

LC-22SV2E

Digital PWB

Main PWB

Chasis Frame Cover

Operation PWB

Chassis Frame

Inverter PWB

Control Panel (Top Cover)

R/C, LED PWB

LC-22SV2E

» Precautions in handling the LCD panels

1. Work in a clean room (with humidities below 50%).

2. Be sure to wear an anti-static armband.

3. Handle the panels on an electroconductive mat.

4. Be careful not to fall, shake and shock the panels.

15. Remove the LCD panel unit fixing screws (4 pcs.).

16. Remove the reflection/deflection, prism and diffusion sheets.

17. Remove the ITO earth spring fixing screw (1 pc.).

18. Remove the ITO sheet and diffusion panel.

19. Remove the lamp fixing holder fixing screws (6 pcs.).

20. Detach the lamp clip (4 pcs.).

21. Detach the lamp unit-A/B.

22. Remove the reflection panel fixing screws. (6 pcs.).

Diffusion Panel (PCOVU0108CEZZ)

ITO Earth Spring (MSPRP1220CEFW)

22" LCD Panel Unit (RLCDTA011WJZZ)

Lamp Fixing Holder (LHLDZ2184CEKZ)

Back Sheilding Plate (PSLDM4699CEFW)

Lamp Clip (LHLDZ2185CEZZ)

Diffusion Sheet (PSHEP0294CEZZ)

Prism Sheet (PSHEPA002WJZZ)

Reflection / Deflenction Sheet (PSHEPA003WJZZ)

Lamp Fixing Holder (LHLDZ2184CEKZ)

ITO Sheet (PSHEP0295CEZZ)

Lamp Unit-A (KLMP-0126CEZZ)

Lamp Unit-B (KLMP-0127CEZZ)

Reflection Panel (PMiR-0299CEZZ)

LC-22SV2E

ADJUSTING PROCEDURE OF EACH SECTION

The best adjustment is made before shipping. If any position deviation is found or after part replace is performed, adjust as follows.

Preparation for adjustments

Use the dedicated AC adaptor or stable DC power supply. AC adaptor: UADP-0241CEPZ DC power supply: 13V 5.4A

1.Entering the adjustment processing mode

• A “POWER” key is made on with pushing an “TV/VIDEO” and “MENU” keys at the same time.(K of the inspection process mode is displayed by the upper left of the image plane.) → Next, “CH (Ù)” and “VOL (–)” keys are pushed

at the same time.(It becomes the image plane of the adjustment process mode.).....When it is canceled, it is made

to turn it off.(Even off in the “MAIN POWER” key, off with R/C are good.)

2.Key operation in the adjustment process mode

• The receiving channel UP/DOWN is performed with the “CH (ù)/(Ù)” keys. One push ... The UP/DOWN tuning is performed per channel. Continuous push ... The UP/DOWN search is performed until a next receivable station is found.

• Various adjustments The adjustment is performed for each item by the “MENU”, “Menu cursor”, “CH (ù)/(Ù)” or “VOL (+)/(–)” keys (LCD TV set and remote control).

• Adjustment item is chosen with the Menu cursor upward/downward keys.

• The adjustment item makes a toggle operation with the “MENU” key input. (Next item) If the “MENU” key is input while the bottom item is selected, it moves to the top item on the next page.

• Press the auto preset button on the remote controller in the adjustment process mode, and the top item of the

next page will show up regardless of which item appears now. Page 1 → Page 2 → ... → Page 23 → Page 1

• Press the manual memory button on the remote controller in the adjustment process mode, and the top item of the same page will show up.

• UP/DOWN of each adjustment vale selected is performed with the VOL (+)/(–) keys input.

• For P16 – 17, the unit enters the register select mode with the VOL (+)/(–) keys input while NTSC/PAL is selected,

and the cursor moves to the address 01.

• The cursor moves up or down with the “CH (ù)/(Ù)” keys and moves left or right with the VOL (+)/(–) keys, and a decision is made with the 12 key. When the decision is made, the cursor moves to the adjustment value selected, and UP/DOWN of each adjustment value selected by the “VOL (+)/(–)” keys input is performed. 00 ↔ 01 ↔ ... ↔ 79 ↔ 7A ↔ ... ↔ FF ↔ 00 ↔ ... Decide with the 12 key and return to the address select. Move to the next item with the “MENU” key. During address select, the cursor movement by the “VOL (+)/(–)” keys input is as follows: Example: 01 ↔ 02 ↔ 03 ↔ 01 ↔ ... The cursor movement by the “CH (ù)/(Ù)” keys input is as follows: Example: 02 ↔ 05 ↔ ... ↔ F6 ↔ 02 ↔ ...

3.Initialization

3-1. Connect the pins (81) and (82) of IC2001 (microprocessor) to GND, and turn on the power. 3-2. Select the model name to (22SV2E/22SV2K).

LC-22SV2E

4.Adjustment

4-1. +B (5V) adjustment (R3750 : Main Unit)

1) Receive the colour bar signal.

2) Adjust the voltage of the positive (+) side of C3724 to 5.00 ±0.02V. Note: Since 5.0V is a reference voltage of all power voltage, adjust it precisely.

4-2. +B (13V) adjustment (R4657 : Digital Unit)

1) Receive the colour bar signal.

2) Connect the digital voltmeter to TP4751, and adjust to 13.00 ±0.05V. Note: Since 13.00V is a reference voltage of all power voltage, adjust it precisely.

4-3. Counter-bias adjustment

Please perform this adjustment to each "50Hz" and "60Hz".

1) Enter the process adjustment mode.

2) Select the "14" (Dot reversal flicker pattern) of "G/A TEST PATTERN" on page 19 of the adjustment process mode.

3) Select the "COM BIAS 60"/"COM BIAS 50" on page 2 of the adjustment process mode.

4) Adjust the flicker of a screen to be minimum.

4-4. TAMP adjustment

1) Receive the colour bar signal.

2) See if the "Y" reading on page 2 of the adjusment process mode is somewhere following. If not, make the "PAL TAMP" adjustment to get the "Y" reading in the range of "BB" thru "CA".

3) If the adjustment of "PAL TAMP" is executed, write its adjustment value to the "SECAM TAMP" manually.

(Screen of the page 2 of the adjustment processing menu OSD)

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 0 1

2 3 4 5 6 7 8 9

10 11 12 13 14

COM B I AS 6 0 COM B I AS 5 0 PAL TAMP SECAM TAMP CUTOF F RX1 GX1 BX 1 RY1 GY1 BY 1 RX2 GX2 BX 2 RYY2 GY2 BY2

TAMP H TAMP L

45 75 021

320

24 24

–

45 76 021

225 320

Y Data

(White 75%)

45 86 021

C0 CA

4-5. White balance adjustment

1) Receive the following signal. Window pattern signal having left 70% white and right 40% white.

2) Adjust the "RY1, GY1, BY1" and "RY2, GY2, BY2" on page 2 of the adjustment process mode to be best condition. It is about "RY1, GY1, BY1" at 40% gray. It is about "RY2, GY2, BY2" at 70% gray. Adjusting value; x=0.257, y=0.264 (40% gray)

x=0.274, y=0.284 (70% gray)

Note:This adjustment must be done after aging for 30 minutes or longer.

5. Lamp error detection

5-1. Functional 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 followings occur. 1 The main unit of television is turned OFF 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, television can not be turned ON. (The power LED

remains red.)

5-2. Countermeasures 5-2-1.Check when turning OFF the lamp error detection

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 "ERROR NO RESET" on line 7, page 1 of the adjustment process is 1 or more. If it is 1 or more, it indicates the lamp error detection was executed.

5-2-2.Resetting of the lamp error count

After confirming that the lamp or lamp circuit is normal, reset the lamp error count. Select "ERROR NO RESET" on line 5, page 1 of the adjustment process and set the number to 0 using the volume button.

LC-22SV2E

Page 1 of the adjustment process

M O D E L SV2E N T S C P W M F R E Q 1DD P A L P W M F R E Q 1DD N T S C P W M D U T Y 0 P A L P W M D U T Y 0 T V G A I N OFF ERROR NO RESET 0

Reset 0

P U B L I C M O D E OFF

W L D 1 3 V E R 1 . 0 0

Afterwards, perform the operation check to confirm that the lamp error detection does not function.

LC-22SV2E

Pin functions of microprocessor IC (IC2001) RH-iXA380WJZZQ

. Pin name Function 1 N. C. 2 N. C. 3 SCL2 4 SDA2 5 VACT 6 CSYNC 7 IREM-1 8 BYTE 9 CNVSS

10 TEST_RST 11 SH_ON 12 RESET 13 XOUT 14 VSS 15 XIN 16 VDD 17 OSCIN 18 OSCOUT 19 PSWIN 20 VSYNC 21 BLK 22 N. C. 23 DAC1CS 24 DAC2CS 25 SCL1 26 SDA2 27 A_DA 28 SCK 29 SSI 30 SSO 31 N. C. 32 R 33 G 34 B 35 TEXT_OUT 36 TEXT_IN 37 SCLK 38 BUSY 39 A_ENA 40 N. C. 41

MREADY/EPM 42 L_ERR 43 N. C. 44 SSB 45 SRDYB 46 CE 47 CK 48 DA 49 PD 50 VSH_OUT

Open Open I2C bus clock data output I2C bus data output/input Scaller IC Composite sync Signal Remote control signal input GND GND/FLASH write (3.3V) TEXT reset output TEXT communication control Reset input (H;Normal, L;Reset) System clock output GND System clock input Power (3.3V) OSD frequency input OSD frequency output Main power input (H;OFF, L;On) Scaller OSD blank output

DAC1 chip select DAC2 chip select I2C bus clock putput I2C bus data in/output Autowide Scaller clock output Scaller data input Scaller data output L output fixed OSD R signal output OSD G signal output OSD B signal output TEXT data output/FLASH write TEXT data input/FLASH write FLASH write FLASH write Autowide L output fixed External bus mode shift input/FLASH write (H;Normal, L;External bus mode shift demand) Lamp error detect input (H;Error, L;Normal) L output fixed For scaller IC For scaller IC FLASH write For autowide For autowide For autowide Regulator control output (H;On, L;Off)

. Pin name Function 51 REQ_OUT 52 HPMUTE 53 SMUTE 54 TEXT_MODE1 55 TEXT_MODE0 56 PAMUTE 57 VSH IN 58 DEF 59 STB 60 SRESET 61 N. C. 62 HSYNC 63 POWIN 64 VSYNC 65 TV/AV1 66 AV/AV2 67 EXT 68 I2/UA 69 SW_SYNC 70 VACT_CONT 71 PMUTE 72 TVPOW 73 RGBCON 74 RC_LED 75 OPC_LED 76 PRT_LED 77 MP_CS 78 MP_DA 79 MP_CLK 80 DDC_RESET 81 KEY3 82 KEY4 83 PANEL_POW 84 TEXT_H 85

TUNERMODE1

TUNERMODE2 87 N. C. 88 SSW 89 AFT 90 N. C. 91 KEY1 92 KEY2 93 SLOW_SW 94 OPC 95 N. C. 96 N. C. 97 N. C. 98 TVSETB 99 VCCE

100

N. C

Completion output of external bus mode shift (H;Normal, L;External bus mode) Headphone mute output (H;On, L;off) Audio mute output (H;On, L;Off) TEXT microprocessor updating TEXT microprocessor updating Speaker standby mute output (H;Off, L;On) Regulator power detect (H;Normal, L;Abnormal) Extrnal output audio mute output (H;On, L;Off) Microprosessor power supply OFF output Multiplex reset output (H;Normal, L;Reset) L output fixed OSD horizontal sync signal input DC/DC Start-up detect input (H;On, L;Off) OSD vertical sync signal input TV/External select (H;TV, L;External) AV1/AV2 select (H;AV2, L;AV1) External control change I2C/UART change Synchronous change control For scaller IC Video mute output (H;On, L;Off) TV power control (H;On, L;Off) SCART RGB detect R/C receive LED output Auto save LED output (H;On, L;Off) Slave IC error detect output (FLASH) G/A chip select G/A data output G/A clock output Digital decoder reset (H;Normal, L;Reset) Key input 3 Key input 4 Panel power control (H;On, L;Off) TEXT/SCART RGB change (H;TEXT, L;SCART) System change System change L output fixed S terminal insert detect (H;Not connect, L;Connect) AFT voltage input L output fixed Key input 1 Key input 2 Slow switch detect input Auto save sensor level input Open Open Pull up GND Power(5V) Pull-up

Adjustment process mode menus at a glance

Page Item

MODEL SV2E Model name NTSC PWM FREQ 1DD Dimmer frequency setting PAL PWM FREQ 1DD Dimmer frequency setting NTSC PWM DUTY 0 Dimmer duty setting PAL PWM DUTY 0 Dimmer duty setting TV GAIN OFF Audio gain setting in TV mode ERROR NO RESET 0 Lamp error count & reset PUBLIC MODE OFF Public mode

2 COM BIAS 60 59 Counter bias adjustment (60Hz)

COM BIAS 50 39 Counter bias adjustment (50Hz) PAL TAMP 21 TAMP adustment SECAM TAMP 21 TAMP adustment CUTOFF RX1, GX1, BX1 45 cutoff adjustment CUTOFF RY1, GY1, BY1 RY1:75 cutoff adjustment

CUTOFF RX2, GX2, BX2 201 cutoff adjustment CUTOFF RY2, GY2, BY2 RY2:230 cutoff adjustment

Y 00h Data read value at TAMP adjustment TAMP H CA Y upper limit setting at TAMP adjustment TAMP L BB Y lower limit setting at TAMP adjustment

3 TV PAL CONT 48 Contrast setting (TV PAL)

TV SECAM CONT 48 Contrast setting (TV SECAM) AV NTSC CONTRAST 45 Contrast setting (external NTSC) AV PAL CONTRAST 45 Contrast setting (external PAL) AV SECAM CONTRAST 45 Contrast setting (external SECAM) AV PAL-M CONTRAST 45 Contrast setting (external PAL-M) AV PAL-N CONTRAST 45 Contrast setting (external PAL-N) AV PAL60 CONTRAST 45 Contrast setting (external PAL-60) V SCROLL 60 Picture size It changes with picture size. V SCROLL 50 Picture size It changes with picture size. H SCROLL 60 Picture size It changes with picture size. H SCROLL 50 Picture size It changes with picture size.

4 TV GEQ BAND1 1 Equalizer setting 1(TV)

TV GEQ BAND2 -1.5 Equalizer setting 2(TV) TV GEQ BAND3 0.5 Equalizer setting 3(TV) TV GEQ BAND4 0.5 Equalizer setting 4(TV) TV GEQ BAND5 1 Equalizer setting 5(TV) EXT GEQ BAND1 1 Equalizer setting 1(external input) EXT GEQ BAND2 -1.5 Equalizer setting 2(external input) EXT GEQ BAND3 0.5 Equalizer setting 3(external input) EXT GEQ BAND4 0.5 Equalizer setting 4(external input) EXT GEQ BAND5 1 Equalizer setting 5(external input) AVC 4SEC AVC setting CARRIER MUTE OFF Audio output setting out of sync with TV IGR THR 12D IGR thresh level

5 MSP DATA 0 Audio IC MSP data write & read

MSP DATA WAIT Write & read execution PRESCALE FM/AM-M 17 Pre-scale setting (M) PRESCALE FM/AM-B 17 Pre-scale setting (B) PRESCALE FM/AM-D 17 Pre-scale setting (D) PRESCALE FM/AM-I 17 Pre-scale setting (I) PRESCALE FM/AM-L 20 Pre-scale setting (L) PRESCALE NICAM 40 Pre-scale setting (NICAM) PRESCALE SCART 15 Pre-scale setting (external input) FSP TEST OFF Audio test (FS mute ON/OFF) 0018H 1D ONTA 1

6 I2C DATA 0 I2C bus control IC data write & read

I2C DATA WAIT Write & read execution CBW 1 Chroma band pass setting NOSEL 3 Comb filter setting DDR 1 Comb filter setting HDG 3 Comb filter setting

Initial setting

GY1:76 BY1:85

GY2:225 BY2:230

Function Adjust/modify

LC-22SV2E

Page Item

6 VDG 0 Comb filter setting

VPK 0 Comb filter setting KILVL 08 8 Color killer level setting KILHY 05 5 Color killer hysteresis setting VSYNC DELAY 7 Vsync delay control setting DVC0 -720 Crystal oscillator center frequency adjustment AUTO LCK 400 Crystal oscillator line-locked mode setting

7 VPC DATA 0 Video IC VPC data write & read

VPC DATA WAIT Write & read execution TEST PATTERN 0 VPC test pattern select AUTO LDLY 0 Y/C phase setting DVD NTSC CR 18 Color density setting(component) DVD NTSC CB 16 Color density setting(component) DVD NTSC TINT 0 Color tone setting(component) DVD NTSC BRIGHTNESS 71 Brightness setting(component) DVD NTSC CONTRAST 25 Video setting(component) DVD NTSC P FILTER 0 Peaking filter setting(component) DVD NTSC H-PEAKING 3 Picture quality setting(component) DVD NTSC BRIGHT2 8 Brightness setting 2(component) DVD NTSC CONTRAST2 45 Video setting 2(component)

8 DVD PAL CR 23 Color density setting(component)

DVD PAL CB 19 Color density setting(component) DVD PAL TINT 0 Color tone setting(component) DVD PAL BRIGHTNESS 71 Brightness setting(component) DVD PAL CONTRAST 25 Video setting(component) DVD PAL P FILTER 0 Peaking filter setting(component) DVD PAL H-PEAKING 3 Picture quality setting(component) DVD PAL BRIGHT2 8 Brightness setting 2(component) DVD PAL CONTRAST2 45 Video setting 2(component)

9 N358 AV COLOR 1800 Color density setting(composite,S-video)

N358 AV TINT 70 Color tone setting(composite,S-video) N358 BRIGHTNESS 10 Brightness setting(TV,composite,S-video) N358 PEAKING FILTER 0 Peaking filter setting(TV,composite,S-video) N358 AV H-PEAKING 3 Picture quality setting(composite,S-video) N358 AVO START 145 Horizontal position setting N358 SFIF 8 Horizontal position setting N358 SCINC1

N358 AV LDLY 0 Y/C phase setting(composite,S-video)

10 N443 AV COLOR 1800 Color density setting(composite,S-video)

N443 AV TINT 70 Color tone setting(composite,S-video) N443 BRIGHTNESS 10 Brightness setting(TV,composite,S-video) N443 PEAKING FILTER 0 Peaking filter setting(TV,composite,S-video) N443 AV H-PEAKING 3 Picture quality setting(composite,S-video) N443 AVO START 145 Horizontal position setting N443 SFIF 8 Horizontal position setting N443 SCINC1

N443 AV LDLY -2 Y/C phase setting(composite,S-video)

11 PAL TV COLOR 1750 Color density setting(TV)

PAL AV COLOR 1800 Color density setting(composite,S-video) PAL TV TINT 70 Color tone setting(TV) PAL AV TINT 70 Color tone setting(composite,S-video) PAL BRIGHTNESS 10 Brightness setting(TV,composite,S-video) PAL PEAKING FILTER 0 Peaking filter setting(TV,composite,S-video) PAL TV H-PEAKING 3 Picture quality setting(TV) PAL AV H-PEAKING 3 Picture quality setting(composite,S-video) PAL AVO START 145 Horizontal position setting PAL SFIF 13 Horizontal position setting PAL SCINC1

PAL TV LDLY 0 Y/C phase setting(TV) PAL AV LDLY -2 Y/C phase setting(composite,S-video)

12 SECAM TV COLOR 1750 Color density setting(TV)

SECAM AV COLOR 1800 Color density setting(composite,S-video) SECAM TV TINT 70 Color tone setting(TV) SECAM AV TINT 70 Color tone setting(composite,S-video)

Initial setting

1078(Panorama)

1600(other)

1078(Panorama)

1600(other)

1078(Panorama)

1600(other)

Function Adjust/modify

Roundness setting

LC-22SV2E

Page Item

12 SECAM BRIGHTNESS 10 Brightness setting(TV,composite,S-video)

SECAM PEAKING FILTER 0 Peaking filter setting(TV,composite,S-video) SECAM TV H-PEAKING 3 Picture quality setting(TV) SECAM AV H-PEAKING 3 Picture quality setting(composite,S-video) SECAM AVO START 145 Horizontal position setting SECAM SFIF 13 Horizontal position setting SECAM SCINC1

SECAM TV LDLY -2 Y/C phase setting(TV) SECAM AV LDLY -2 Y/C phase setting(composite,S-video)

13 PAL-M AV COLOR 1800 Color density setting(composite,S-video)

PAL-M AV TINT 70 Color tone setting(composite,S-video) PAL-M BRIGHTNESS 10 Brightness setting(TV,composite,S-video) PAL-M PEAKING FILTER 0 Peaking filter setting(TV,composite,S-video) PAL-M AV H-PEAKING 3 Picture quality setting(composite,S-video) PAL-M AVO START 145 Horizontal position setting PAL-M SFIF 8 Horizontal position setting PAL-M SCINC1

PAL-M AV LDLY -2 Y/C phase setting(composite,S-video)

14 PAL-N AV COLOR 1800 Color density setting(composite,S-video)

PAL-N AV TINT 70 Color tone setting(composite,S-video) PAL-N BRIGHTNESS 10 Brightness setting(TV,composite,S-video) PAL-N PEAKING FILTER 0 Peaking filter setting(TV,composite,S-video) PAL-N AV H-PEAKING 3 Picture quality setting(composite,S-video) PAL-N AVO START 145 Horizontal position setting PAL-N SFIF 0 Horizontal position setting PAL-N SCINC1

PAL-N AV LDLY -2 Y/C phase setting(composite,S-video)

15 PAL60 AV COLOR 1800 Color density setting(composite,S-video)

PAL60 AV TINT 70 Color tone setting(composite,S-video) PAL60 BRIGHTNESS 10 Brightness setting(TV,composite,S-video) PAL60 PEAKING FILTER 0 Peaking filter setting(TV,composite,S-video) PAL60 AV H-PEAKING 3 Picture quality setting(composite,S-video) PAL60 AVO START 145 Horizontal position setting PAL60 SFIF 13 Horizontal position setting PAL60 SCINC1

PAL60 AV LDLY -2 Y/C phase setting(composite,S-video)

16 AFT UP 2.7

AFT DOWN 1.8 NTSC 01 0 Initial setting NTSC 02 0 Setting NTSC 03 1 Setting NTSC 04 0 Start palse position NTSC 05 0 Start palse position NTSC 06 0 Horizontal display position NTSC 07 0 Vertical display position NTSC 09 10 Panel clock NTSC 0A 0 Upper side mask NTSC 0B 0 Lower side mask NTSC 10 0 Test display NTSC 11 0 Test disp data NTSC 12 80 Flicker disp data NTSC 13 E1 OEM low start NTSC 14 1 OEM low start NTSC 15 0 OEM low end NTSC 16 10 OEM low end NTSC 17 61 SP position NTSC E0 0 Test setting NTSC E1 0 Test setting NTSC F0 7 PWM output NTSC F3 DD PWM frequency L bit NTSC F4 1 PWM frequency H bit NTSC F5 0 PWM duty L bit NTSC F6 0 PWM duty H bit

Initial setting

1078(Panorama)

1600(other)

1078(Panorama)

1600(other)

1078(Panorama)

1600(other)

1078(Panorama)

1600(other)

Function Adjust/modify

Roundness setting

LC-22SV2E

Page Item

17 PAL 01 0 Initial setting

PAL 02 0 Setting PAL 03 1 Setting PAL 04 0 Start palse position PAL 05 0 Start palse position PAL 06 0 Horizontal display position PAL 07 0 Vertical display position PAL 09 10 Panel clock PAL 0A 0 Upper side mask PAL 0B 0 Lower side mask PAL 10 0 Test display PAL 11 0 Test disp data PAL 12 80 Flicker disp data PAL 13 E1 OEM low start PAL 14 1 OEM low start PAL 15 0 OEM low end PAL 16 10 OEM low end PAL 17 61 SP position PAL E0 0 Test setting PAL E1 0 Test setting PAL F0 7 PWM output PAL F3 DD PWM frequency L bit PAL F4 1 PWM frequency H bit PAL F5 0 PWM duty L bit PAL F6 0 PWM duty H bit

18 VL256 70 Gradation power referrence voltage

REF256 79 Gradation power referrence voltage VL224 54 Gradation power referrence voltage REF224 113 Gradation power referrence voltage VL192 43 Gradation power referrence voltage REF192 101 Gradation power referrence voltage VL160 46 Gradation power referrence voltage REF160 193 Gradation power referrence voltage VL128 60 Gradation power referrence voltage REF128 192 Gradation power referrence voltage

19 VL96 52 Gradation power referrence voltage

REF96 228 Gradation power referrence voltage VL64 100 Gradation power referrence voltage REF64 166 Gradation power referrence voltage VL0 110 Gradation power referrence voltage REF0 180 Gradation power referrence voltage G/A TEST PATTERN1 0 Gradation test pattern display G/A TEST PATTERN2 0 Gradation test pattern display G/A DATA 0 G/A data write & read G/A DATA WAIT Write & read execution

20 LSYNC 625 Sync ID threshold level(TV)

HSYNC 655 Sync ID threshold level(TV) AVSYNC 5000 Sync ID threshold level(external input) VPC FP20H VPC data read value VPC FP21H VPC data read value VPC FP13H VPC data read value MSP DEMO200H MSP data read value L ERROR WAIT 15s Lamp error detect wait time L ERROR H TIME 1s Lamp error detect time LR EXCHANGE 100m Sound LR exchange time MSP ASS WAIT 1.2S Automatic sound select time

21 DENKA PORT OFF Power off mode setting

DENKA TESTP 0 Power off mode setting DENKA TESTP2 30ms Power off mode setting

22 TEXT COMM Text IC control command setting

TEXT COMM WAIT Write & read execution TEXT REGISTER Text IC register setting TEXT REGISTER WAIT Write & read execution NAME Text IC networkname setting TEXT HEADER NAME WAIT Write & read execution V POSITION 1F Text vertical position setting H POSITION B0 Text horizontal position setting

Initial setting

Function Adjust/modify

LC-22SV2E

Page Item

22 EXT CONTROL OFF External control select

EXT MODE UART External mode select UPDATE MODE NORMAL Update mode select TEXT RESET OFF Text reset

23 NR DATA OFF Noise reduction IC data sending

NR 40H EC Noise reduction IC data NR 41H D0 Noise reduction IC data NR 42H 00 Noise reduction IC data NR 43H 80 Noise reduction IC data NR 45H 08 Noise reduction IC data NR 51H 80 Noise reduction IC data

24 50 OPC LV0 00 Opc save level 0 duty setting

50 OPC LV1 8 Opc save level 1 duty setting 50 OPC LV2 1 6 Opc save level 2 duty setting 50 OPC LV3 2 4 Opc save level 3 duty setting 50 OPC LV4 3 2 Opc save level 4 duty setting 50 OPC LV5 4 0 Opc save level 5 duty setting 50 OPC LV6 4 8 Opc save level 6 duty setting 50 OPC LV7 5 6 Opc save level 7 duty setting 50 OPC LV8 6 4 Opc save level 8 duty setting 50 OPC LV9 7 2 Opc save level 9 duty setting 50 OPC LV10 80 Opc save level 10 duty setting

25 60 OPC LV0 0 Opc save level 0 duty setting

60 OPC LV1 8 Opc save level 1 duty setting 60 OPC LV2 1 6 Opc save level 2 duty setting 60 OPC LV3 2 4 Opc save level 3 duty setting 60 OPC LV4 3 2 Opc save level 4 duty setting 60 OPC LV5 4 0 Opc save level 5 duty setting 60 OPC LV6 4 8 Opc save level 6 duty setting 60 OPC LV7 5 6 Opc save level 7 duty setting 60 OPC LV8 6 4 Opc save level 8 duty setting 60 OPC LV9 7 2 Opc save level 9 duty setting 60 OPC LV10 80 Opc save level 10 duty setting

Initial setting

Function Adjust/modify

LC-22SV2E

Check all the settings microprocessor's adjust process menu.

Do F3701 and F3702

function?

Are T701's secondary

outputs, +32V, +9V,

+5V and -8V normal?

Remove F3701 and F3702

and check the load side.

Is there short-circuiting?

Is there short-circuiting of

T3701 primary side periphery,

Q3702, Q3711 and P3706?

Replace F3701 and F3702.

Check T3701's secondary

side periphery.

Check T701's secondary

load.

Check all connection of each unit. (Refer to overall wiring diagram.)

Check T701's primary side

periphery.

Check T3701's primary side

periphery, Q3711 and their

perpheral parts.

Does F3701, F3702, F6551,

F6552, F6553 and F6554

function?

Is the pin (31) of IC4561 in

the "H" state?

Are the Q6553, Q6556, Q6559

and Q6562 short-circuiting?

Is T6551~T6557's primary

oscillator waveform normal?

Replace the fluorescent

lamp with new one and

check again.

Check the OFL line, IC14561

and their peripheral parts.

Check Q6553, Q6556,

Q6559, Q6562 and their

peripheral parts.

Check Q6551, Q6554, Q6557,

Q6560, Q6552, Q6555,

Q6558, Q6561 and

connection cable.

No picture, No sound

Yes

No No

Fluorecent lamp failure to light up

Yes

TROUBLE SHOOTING TABLE

TROUBLE SHOOTING TABLE (Continued)

Check all the settings microprocessor's adjust process menu.

Is in/output of

IC801 normal?

Is in/output of

IC4101 normal?

Check IC801

and its

peripheral parts.

Check IC4101

and its

peripheral parts.

Check IC3402

and its

peripheral parts.

Check IC801,

AV1 line and its

peripheral parts.

Is in/out of

IC4561 normal?

Check IC4561

and its

peripheral parts.

Check LCD

panel voltages

and waveform.

Is in/output of

IC3402 normal?

Is input at pin

(73) of IC801

normal?

Is voltages at

pins (6), (7)

and (18) of

tuner normal?

Is output at pin

(13) of tuner

normal?

Check the

power line.

Check tuner

and its

peripheral parts.

Is input at pin

(3) of IC3402

normal?

Is the pins (2)

and (4) of

IC3402 at "H"

and "L" state?

Check the pins

(65) and (66) of

IC2001 at "H"

and "L" state.

Check the its

line.

Check IC3402

and its

peripheral parts.

Is input at pin

(1) of IC3402

normal?

Is the pins (2)

and (4) of

IC3402 at "L"

state?

Check the its

line.

Check IC3402

and its

peripheral parts.

Check the pins

(65) and (66) of

IC2001 at "L"

state.

No picture

at all

No TV and

VIDEO 2

output

No TV output

No VIDEO 2

output

Yes

LC-22SV2E

Check all the settings microprocessor's adjust process menu.

Is input at pin

(74) of IC801

normal?

Check the AV1

line (SCART

INPUT) and

their peripheral

parts.

Check the

SY-line, SC-line

and their

peripheral parts.

Is input at pins

(71) and (72) of

IC801 normal?

Is input at pin

(70) of IC801

normal?

Check the

V2VO line and

their

peripheral parts.

Is input at pins

(96)~(107),

(110)~(121)

and (132)~(143)

of IC4101

normal?

Is output at pins

(57)~(60) of

IC1601

normal?

Check IC4101

and its

peripheral parts.

Check the its

line. (V2V0)

Check the its

line.

Is output at pin

(21) of IC1601

normal?

Check IC1601

and its

peripheral parts.

No picture

No VIDEO 1

output

No S-VIDEO

(VIDEO 1)

output

No line

output

No TELETEXT

output

No No No

Yes

TROUBLE SHOOTING TABLE (Continued)

Check all the settings microprocessor's adjust process menu.

Is source GND

normal?

Is CSCOM

waveform

normal?

Check FB4901,

FB4902 and its

peripheral parts.

Check IC4702,

IC4711, Q4701

and their

peripheral parts.

Check FB4562

and its

peripheral parts.

Is gate GND

normal?

Is gate clock

(GCK) normal?

Check FL4572,

R4582 and gate

aray peripheral

parts.

Check IC4568

and its

peripheral parts.

Is VEE-6V being

outputted?

Is VGH+34V

being

outputted?

Check IC4565

and its

peripheral parts.

Is GSP

waveform

normal?

Check R4578

and its

peripheral parts.

Is VSH+3.3V

being

outputted?

Is source clock

normal?

Check IC4713

and its

peripheral parts.

Check R4563,

IC4561 and

their peripheral

parts.

Check IC4907

and gate aray

peripheral parts.

Is output of LBR

normal?

No picture

Becomes

dark

Time passes,

becomes

dark

Yes

Becomes

white.

Yes

Vertical line

output

Yes

LC-22SV2E

Check all the settings microprocessor's adjust process menu.

Is output of

R00~R07,

RE0~RE7

normal?

Is output of

G00~G07,

GE0~GE7

normal?

Is output of

B00~B07,

BE0~BE7

normal?

Check

FL4561~FL4564,

R4671~R4674

and their

peripheral parts.

Check

R4675~R4678,

FL4565~FL4568

and their

peripheral parts.

Check

R4679~R4682,

FL4569,

FL4510~FL4512

and their

peripheral parts.

Check IC4569,

IC4570 and

their peripheral

parts.

Is VLS +13V

being

outputted?

Is in/output of

SPIO and

SPOI normal?

Check R4571,

R4572, IC4561

and their

peripheral parts.

Is output VL0,

VL64, VL96,

VL128, VL160,

VL192, VL224,

VL256,

VH0, VH64,

VH96, VH128,

VH160, VH192,

VH224 and

VH256 normal?

Check

IC4703~IC4710

and their

peripheral parts.

No picture

Yes

Colour is

unusual

Picture

image is

gloomy

No picture

image

inversion

Gradation

defect

TROUBLE SHOOTING TABLE (Continued)

Check all the settins microprocessor's adjust process menu.

Is the pin (53) of

IC2001 in the

"L" state?

Is output at pins

(26) and (27) of

IC1901 normal?

Is output at pins

(1) and (7) of

IC1903 normal?

Is output at pins

(8) and (12) of

IC3305 normal?

Muting effect is

on. Check the

SMUTE line.

Check IC1901

and its

peripheral parts.

Is the pin (5) of

IC3305 in the

"H" state?

Muting effect is

on. Check the

SSTBY line.

Check IC1903

and its

peripheral parts.

Check IC3305

and its

peripheral parts.

Check front

speaker and

connection

cable.

Is the pin (52) of

IC2001 in the

"L" state?

Is output at pins

(24) and (25) of

IC1901 normal?

Is output at pins

(1) and (7) of

IC304 normal?

Check J2204

(Headphones).

Muting effect is

on. Check the

MP-MUTE line.

Check IC1901

and its

peripheral parts.

Check IC304

and its

peripheral parts.

Is output at pins

(37) and (38) of

IC1901 normal?

Is output at pins

(1) and (7) of

IC1902 normal?

Check IC1901

and its

peripheral parts.

Check IC1902

and its

peripheral parts.

Check SCART

periphery parts.

Check IC1901

and its

periphery parts.

Check J3902,

J3903 and their

periphery parts.

Is output at pin

(11) of tuner

normal?

Is input at pins

(67) and (69) of

IC1901 normal?

Check the tuner

and its

peripheral parts.

Check SIF1 and

SIF2 line and

their peripheral

parts.

Is output at pins

(33) and (34) of

IC1901 normal?

Is output at pins

(1) and (7) of

IC3500 normal?

Check IC1901

and its

peripheral parts.

Check IC3500

and its

peripheral parts.

No sound

from front

speakers

No sound

from

headphone

TV sound

failure

No sound from

RCA output line

Yes

No No

Yes YesYes

No sound

from SCART

output line

Yes

TROUBLE SHOOTING TABLE (Continued)

LC-22SV2E

CHASSIS LAYOUT

DIGITAL Unit

MAIN Unit

OPERATION Unit

R/C, LED Unit

87109654321

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