Toshiba 32XV556D Schematic

SERVICE MANUAL

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LCD Color Television

32XV556D

Ver. 2.00

This model is classified as a

Service Manual describes replacement parts for the green product. When repairing this green

product, use the part(s) described in this manual and

For (*1) and (*2), refer to

© TOSHIBA CORPORATION

green product (*1), as indicated by the underlined serial number. This

GREEN PRODUCT PROCUREMENT and LEAD-FREE SOLDER.

lead-free solder (*2).

ADJUSTMENT

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Service Mode

Entering to Service Mode

1. Set VOLUME to minimum and press
button once on remote control.

↓

↓

Service Mode display

2. Press button again and hold button down.

3. While holding the button, press MENU
button on TV set.

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Displaying the Adjustment Menu

Press MENU button on TV.

Service Mode

Press ↑ ↓ Press

Adjustment Mode

Key Function in the Service Mode

The following key entry during display of adjustment menu provides special functions.

CAUTION: Never try to perform initialization unless you have changed the

memory IC.

button (on remote control)

Never adjust H.POS and V.POS except PAL/WIDE mode.

Test signal selection

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Selection of the adjustment items

Change of the data value

Adjustment menu mode ON/OFF MENU button (on TV)

Initialization of the memory (QA02)

Reset the count of operating

protect circuit to "00"

Turn off I2C bus communication

"RCUT" selection 1 button

"GCUT" selection 2 button

"BCUT" selection 3 button

"CNTX" selection 4 button

"COLC" selection 5 button

"UVTT" selection 6 button

Automatic A/D Adjustment

(PC, Component, Composite (PAL, NTSC))

CH (on TV or remote control)

Volume +/- (on TV or remote control)

CALL + CH button on TV

CALL + CH button on TV

CALL + Volume + button on TV

7 button

Self diagnostic display ON/OFF 9 button

Selecting the Adjusting Item

Every pressing of CH button in the service mode changes the adjustment items in the
order of table below. ( button for reverse order)

SETTING & ADJUSTING DATA

[ SERVICE MODE ]

ADJUSTING ITEMS AND DATA IN THE SERVICE MODE:

Note:

The image system data of RCUT-BDRV is different by each image format.

The PAL value is indicated in the table.

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Item Name of adjustment

RCUT R CUT OFF

GCUT G CUT OFF

BCUT B CUT OFF

RDRV R DRIVE

GDRV G DRIVE

BDRV B DRIVE

BRTC BRIGHTNESS CENTER

COLC COLOR CENTER

UVTT BASE BAND TINT

CNTX CONTRAST MAX

VOLUX MAX VOLUME LIMITED

PLLW0 PLL WAIT TIME

PLLW1 PLL WAIT TIME

PLLW2 PLL WAIT TIME

PLLW3 PLL WAIT TIME

PLLW4 PLL WAIT TIME

PLLW5 PLL WAIT TIME

OPT1 TV SET OPTION 1

OPT2 TV SET OPTION 2

OPT3 TV SET OPTION 3

OPT4 TV SET OPTION 4 (PANEL OPT DATA FOR VENDOR)

OPT5 TV SET OPTION 5 (PANEL OPT DATA FOR SIZE)

OPT6 TV SET OPTION 6 (HOTEL MODE)

OPT7 TV SET OPTION 7 (HOTEL MODE)

OPT8 TV SET OPTION 8 (HOTEL MODE)

TVOP TV SET OPTION

ID MODEL ID

BDWID BORDER WIDTH FOR EXACT SCAN

BDHIT BORDER HEIGHT FOR EXACT SCAN

Factory preset data will be loaded after setting Model ID data.

(Refer to Initialization of Memory Data of QA02 and setting data of signal board.)

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Adjusting the Data

Pressing of VOLUME +/- button will change the value of data in the range from 00H to
FFH. The variable range depends on the adjusting item.

I2C Bus Off

Turn off I2C communication between IC700 and IC400.

1) Press and hold the CALL button on the remote control, then press the Volume
+ button on the TV.

2) Display "BUS Off" OSD.

3) I2C communication turned off.

Note:

To return Bus on status, press and hold the CALL button on the remote control, then press
the Volume + button on the TV again. TV will be turned off and automatically turned
on, then status will be Bus On.

Setting TVOP

Enter to service mode and select menu of TVOP by pressing P or P during display of
adjustment menu. After selecting TVOP, press + or - to set I2C check function to

disable or enable as below.

TVOP FUNCTION DESCRIPTION 1 0 (Normal)

D5 (bit5) I2C check between IC700 and IC400. (WDT) Disable Enable

Setting Panel Option Data

Panel option data is subject to OP4 and OP5.

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Enter to service mode and select menu of OPT4 or OPT5 by pressing P or P during
display of adjustment menu. After selecting OPT4 or OPT5, press + or - to set OPT4

or OPT5 value as table below.

Panel option data

Series Model name Panel vendor OPT4 value OPT5 value

XV555D EU Digital 32XV555D/553D/556D SAMSUNG 0x86 0x45

37XV555D/553D/556D LGD 0x81 0x66

42XV555D/553D/556D LGD 0x81 0x67

46XV555D SAMSUNG 0x86 0x4A

52XV555D SAMSUNG 0x86 0x4B

XV550P EU Analog 32XV550P SAMSUNG 0x86 0x45

37XV550P LGD 0x81 0x66

42XV550P LGD 0x81 0x67

46XV550P SAMSUNG 0x86 0x4A

52XV550P SAMSUNG 0x86 0x4B

OP4

Ex. OPT4 value 0x86 indicates that panel vendor is SAMSUNG.

OPT4

Panel vendor LGD - - - - 0 0 0 1

SHARP - - - - 0 0 1 0

CMO - - - - 0 0 1 1

AUO PMVA - - - - 0 1 0 0

AUO AMVA - - - - 0 1 0 1

SAMSUNG - - - - 0 1 1 0

D7

(bit7)

D6

(bit6)

D5

(bit5)

D4

(bit4)

D3

(bit3)

D2

(bit2)

D1

(bit1)

(bit0)

D0

IPS - - - - 0 1 1 1

Panel

Resolution

Full HD 1 - - - - - - -

WXGA 0 - - - - - - -

OP5

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Ex. OPT5 value 0x45 indicates that panel size is 32.

OPT5

Size 26 - - - - 0 0 1 1

32 - - - - 0 1 0 1

37 - - - - 0 1 1 0

42 - - - - 0 1 1 1

46 - - - - 1 0 1 0

52 - - - - 1 0 1 1

Backlight

Status Logic

Backlight

Status Check

Positive - - 1 - - - - -

Negative 0

Execute - 1 - - - - - -

Unexecuted 0

D7

(bit7)

D6

(bit6)

D5

(bit5)

D4

(bit4)

D3

(bit3)

D2

(bit2)

D1

(bit1)

(bit0)

D0

Convert from Bit (Binary) to Hex

The table for converting from bit (D7-D0) to hex (0x**).

BIT (Binary)

High nibble D7 D6 D5 D4

Low nibble D3 D2 D1 D0

HEX 0 0 0 0 0

1 0 0 0 1

2 0 0 1 0

3 0 0 1 1

4 0 1 0 0

5 0 1 0 1

6 0 1 1 0

7 0 1 1 1

8 1 0 0 0

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9 1 0 0 1

A 1 0 1 0

B 1 0 1 1

C 1 1 0 0

D 1 1 0 1

E 1 1 1 0

F 1 1 1 1

E.g. If Bit D7-0 = 0101 1010, Hex data is 0x5A.

Exit from Service Mode

Pressing POWER button to turn off the TV once.

Initialization of Memory Data of QA02 and Setting Data of Signal Unit

After replacing QA02 or signal board, the following initialization is required.

CAUTION: Never attempt to initialize the data unless QA02 has been

replaced.

Whenever using new signal board to the set, setting the Model ID data

according to Panel option data.

1) Enter the service mode.

2) Select menu of ID by pressing P or P during display of adjustment menu in the
service mode.

3) Change ID data into MODEL ID to initialize by pressing + or -, refer to table
below.

4) Press and hold the CALL button on the remote control, then press the CHANNEL

button on the TV.

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5) Initialization progress dialog including model name and panel vendor is shown.

Progress status is "WRITING".

6) Progress status is changed "OK" and power cycle (automatically). Then QA02

initialization has been completed.

7) Enter the service mode and select version check mode. Confirm if model name and

model id set is correct. If not, repeat steps 1) to 6).

Note:

In case initialization by setting wrong MODEL ID is done, there is a possibility of

abnormal display.

8) Set I2C check function of TVOP to enable.

9) Check the picture carefully. If necessary, adjust any adjustment item above.

Perform "Auto tune" on the owner's manual.

MODEL ID (HEX) Model name Panel vendor

0x01 32XV555D/553D/556D SAMSUNG

0x02 37XV555D/553D/556D LGD

0x03 42XV555D/553D/556D LGD

0x04 46XV555D SAMSUNG

0x05 52XV555D SAMSUNG

0x06 32XV550P SAMSUNG

0x07 37XV550P LGD

0x08 42XV550P LGD

0x09 46XV550P SAMSUNG

0x10 52XV550P SAMSUNG

0x11

0x12

0x13

0x14

0x15

0x16

0x17

0x18

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0x19

0x20

0x21

0x22

0x23

0x24

0x25

0x26

0x27

0x28

0x29

0x30

0x31

0x32

0x33

Initializing Data setting flowchart after replacing the Signal Unit

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Test Signal Selection

Every pressing of button on the remote control changes the built-in test patterns on

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screen as described below in Service Mode.

Picture Signal

Red raster

Green raster

Blue raster

All Black

All White

Self Diagnostic Function

1. Press "9" button on remote control during display of adjustment menu in the service

mode. The diagnosis will begin to check if interface among IC's is executed properly.

2. During diagnosis, the following displays are shown.

* Self check display and Item are subject to the models.

NG is abnormal (Red indication).

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(1) Firmware :

Version information of microprocessor

Series name (AAAA) and market area (BB) and software program version (0000)

(2) Time : Total hour of turn the TV on. (Unit : H)

(3) BL_STATUS :

Counter for saving BackLight on error.

This value is counted till 99 (Decimal).

(4) Bus line : -- "OK" is normal

SCL-GND (Red indication) : SCL-GND short circuit

SDA-GND (Red indication) : SDA-GND short circuit

SCL-SDA (Red indication) : SCL-SDA short circuit

(5) Bus cont : --- "OK" is normal.

When the abnormal status is detected, type name of semiconductor is

indicated in red colour.

(6) Block

UV : TV reception mode

V1 - V9 : VIDEO 1-9 input mode

PC : PC mode

YUV : YUV mode

DTV : DTV mode

UV ATV

V1

(SCART (FULL))

1

2

V2 (SCART (S+AV))

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V3

V4

V5 HDMI1

V6 HDMI2

V7 --

V8 --

V9 --

PC --

YUV --

DTV DTV (Digital Only)

(Component)

(Composite)

3

4

Version Check Mode

1. Press "9" button twice on remote control during display of adjustment menu in the

service mode.

The version of main MPU will be checked.

2. During Version Check, the following displays are shown.

* Version check display and Item are subject to the models.

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(1) MAIN MPU :

Version information of microprocessor

Series name and Code Program Version (4 figure number) and OSD Version (2 figure

number).

(2) EEPROM :

Version information of EEPROM : Display 1 byte data.

(3) SUB MPU :

Version information of SUB MPU : Display 1 byte data.

(4) OPTION :

Option information : Display six numbers of 1 byte data.

(5) HDMI ID :

HDMI ID information : Display 4 byte data.

(6) SW Ver

Version information of DB software as Toshiba release. (Only digital model.)

(7) MW Ver

Left side is Application and UI version information of DB software. (Only digital

model.)

Right side is Firmware (Driver) version information of DB software. (Only digital

model.)

(8) A/D Adjust

NTSC (60 Hz) SD signal (composite input).

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A/D adjustment item.

--MAIN : It's enable only in double Window model. A/D adjustment status of main

picture.

--SUB : It's enable only in double Window model. A/D adjustment status of sub

picture.

--COMP : Component input

--PC : PC input

--NTSC :

--PAL : PAL (50 Hz) SD signal (composite input).

--OK : A/D adjustment set correctly.

--NG : A/D adjustment set incorrect.

-- : A/D adjustment is not needed. Because its picture format isn't used.

(9) 100 Hz FPGA Software Version

It's enable only in 100 Hz drive panel model.

(10) Memory Data Version

Version information of EEPROM.

DRMA**** means model number of EEPROM.

REV** means version of EEPROM.

(11) CD number

CD information (ascii code). : Display 4 byte data.

(12) Model Name

Model name information (ascii code). : Display 7 byte data.

(13) LCD Panel Vendor information display

The following Panel Vender (DDD) and screen size (00) and resolution (EEE) are

displayed.

Example : AUO-32 (1080p) indicates that Vender is AUO and Screen Size is 32 inch

and Full HD panel.

Status Check Mode

1. Press "9" button thrice on remote control during display of adjustment menu in the

service mode.

The status of this model will be checked.

2. During Status Check, the following displays are shown.

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* Status check display and Item are subject to the models.

(1) MAIN :

Main source information :

Display RF position number (0 - 99) on the main screen, or Input Source

(EXT1/2/3/HDMI etc.)

(2) MAIN FORMAT :

Display Video and PC format information

(3) MAIN PLL :

Main PLL information : Display 1 byte data at five.

(4) SUB :

Sub source information :

Display RF position number (0 - 99) on the Sub screen, or Input Source

(EXT1/2/3/HDMI etc.)

This item displays only Double window model.

(5) SUB FORMAT :

Display Video and PC format information

This item displays only Double window model.

(6) SUB PLL :

Sub PLL information : Display 1 byte data at five.

This item displays only Double window model.

(7) SCREEN SIZE :

Display the screen size as follows.

Exact Scan

Wide

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Super Live 2

Cinema 2

4:3

Super Live 1

Cinema 1

Subtitle

14:9

Note:

Exact Scan is shown only for 1080p panel model with video input mode except pc.

(8) OTHER STATUS :

Other status information : Display three numbers of 2 byte data.

Setting Hotel Mode

Enter to service mode and select Hotel Mode menu by pressing P or P .
After selecting Hotel Mode, press + to enter details setting in Hotel Mode.

To select menu, press P or P and press OK to enter the adjustment menu of table bellow.
To move the cursor in the adjustment, press + or -.

1. By pressing P or P , OPT2 setting will change the value either 1 or 0 on selected
items as follows;

OP2

OPT2 FUNCTION DESCRIPTION 1

D7 (bit7) - (no use) - -

D6 (bit6) Enable mode that TV On will be appeared in

forced when turning the main power ON

Enable Disable

0

(Normal)

D5 (bit5) FRONT Key Disable Enable

D4 (bit4) All keys except input selector key

(Video/TV)

D3 (bit3) User remote control operation Disable Enable

Disable Enable

(Service mode and

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Supere

User mode may

possible to setting

only)

D2 (bit2) Disable SET UP MENU except language.

(tuning SETUP MENU)

D1 (bit1) Disable SETUP MENU Disable Enable

D0 (bit0) HOTEL Mode On (Enable the setting

Disable

(Display the language

only)

of D1 from to D7)

Enable

Off

(Normal)

VOLUX

Set VOLUX as following.

1) Set speaker volume to 100. (Any value is OK, but 100 is better to check sound level.)

2) Down value of VOLUX until finding suitable sound volume level.

VOLUX FUNCTION DESCRIPTION 1 0 (Normal)

D7 (bit7) ~

D0 (bit0)

Max Limiter of Volume Control 0x00 ~ 0x7F (Normal: 0x7C)

OP6

OPT6 FUNCTION DESCRIPTION 1 0 (Normal)

D7 (bit7) Enable mode that POS or VIDEO program

number will be appeared in forced when turn

ON the main power

D6 (bit6) ~

D0 (bit0)

POS or VIDEO program number 0 ~ 127 [decimal] (Normal: 0)

Enable Disable

POS number: 0 ~ 99

VIDEO number: 100 ~ 127

(DTV = 100, VIDEO = 101,

VIDEO = 102..)

100 is used as ATV when

DTV option is disable.

OP7

OPT7 FUNCTION DESCRIPTION 1 0 (Normal)

Enable mode that speaker volume will be set in

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D7 (bit7)

D6 (bit6) ~

D0 (bit0)

forced when turn ON the main power

Forced speaker volume 0 ~ 100 [decimal] (Normal: 0)

Enable Disable

Value above 100 is no effect.

OP8

OPT8 FUNCTION DESCRIPTION 1 0 (Normal)

D7 (bit7) ~

D3 (bit3)

D2 (bit2) Enable mode that picture mode will be set in

forced when turn ON the main power

D1 (bit1) ~

D0 (bit0)

Forced picture mode 0 [dec]: Dynamic (mode-1)

- (no use) - -

Enable

(Display the

language only)

(Normal)

1 [dec]: Standard (mode-2)

2 [dec]: Mild (mode-3)

3 [dec]: Memory (mode-M)

Disable

LED Indication

The Green and Red LEDs on the TV (at the bottom center of the TV) indicate the TV's

status, as described below.



Red ON (solid) and Green OFF = The TV power cord is plugged in.

FUNCTION AND OPERATION

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The Remote Control

Simple at-a-glance reference of your remote control.

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FUNCTION AND OPERATION

television. Whilst all the necessary adjustments and controls for the television are made using

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Controls and Input Connections

A wide variety of external equipment can be connected to the input sockets on the side of the

the remote control, the buttons on the television may be used for some functions.

Switching On

Using the Remote Control

Using the Controls and Connections

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FUNCTION AND OPERATION

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Tuning Digital Television

Before switching on the television put your decoder and media recorder to Standby if they

are connected.

Tuning for the First Time

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Digital Auto Tuning

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Analogue Switch-off

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Digital Programme Sorting

Digital Manual Tuning

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FUNCTION AND OPERATION

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Tuning Analogue Mode

Quick Setup

Manual Tune

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Programme Skip

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Sorting Programme Positions

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Using Auto Tuning

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SAFETY INSTRUCTION

should enter the mouth, rinse the mouth thoroughly with water. If the fluid should contact the

When attaching the LCD module to the LCD cover, position it appropriately and fasten

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Handling the LCD Module

Safety Precaution

In the event that the screen is damaged or the liquid crystal (fluid) leaks, do not breathe in or

drink this fluid.

Also, never touch this fluid. Such actions could cause toxicity or skin irritation. If this fluid

skin or clothing, wipe off with alcohol, etc., and rinse thoroughly with water. If the fluid

should enter the eyes, immediately rinse the eyes thoroughly with running water.

Precautions for Handling the LCD Module

CAUTION: The metal edges of the LCD module are sharp, handle it with

care.

The LCD module can easily be damaged during disassembly or reassembly; therefore,

always observe the following precautions when handling the module.

1.

at the position where the display can be viewed most conveniently.

2. Carefully align the holes at all four corners of the LCD module with the corresponding

holes in the LCD cover and fasten with screws. Do not strongly push on the module

because any impact can adversely affect the performance. Also use caution when

handling the polarized screen because it can easily be damaged.

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3. If the panel surface becomes soiled, wipe with cotton or a soft cloth. If this does not

remove the soiling, breathe on the surface and then wipe again.

If the panel surface is extremely solied, use a CRT cleaner as a cleaner. Wipe off the

panel surface by drop the cleaner on the cloth. Do not drop the cleaner on the panel.

Pay attention not to scratch the panel surface.

4. Leaving water or other fluids on the panel screen for an extended period of time can

result in discoloration or stripes. Immediately remove any type of fluid from the screen.

5. Glass is used in the panel, so do not drop or strike with hard objects. Such actions can

damage the panel.

6. CMOS-LSI circuitry is used in the LCD module, so avoid damage due to static

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electricity. When handling the module, use a wrist ground or anchor ground.

7. Do not expose the LCD module to direct sunlight or strong ultraviolet rays for an

extended period of time.

8. Do not store the LCD module below the temperature conditions described in the

specifications. Failure to do so could result in freezing of the liquid crystal due to cold

air or loss of resilience or other damage.

9. Do not disassemble the LCD module. Such actions could result in improper operation.

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10. When transporting the LCD module, do not use packing containing epoxy resin

(amine) or silicon resin (alcohol or oxim). The gas generated by these materials can

cause loss of polarity.

PANEL IDENTIFICATION

name, the identification marking will be shown at the last digit of the set serial number on the

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Panel Identification

If the several panels are alternatively used in the same model without amending the model

specification label on the back cover.

In servicing, do not alter the panel because several setting and parts are different.

Marking Panel Vendor Marking Panel Vendor Marking Panel Vendor

A AUO J S SHARP

B K SAMSUNG T

C CMO L LGD U

D M V

E N W

F P X

G Q Y

H IPS R Z

With this alternative use, some of key parts may differ and their combinations are

indicated with the suffix marking on the location number in the part list

(Miscellaneous).

e.g.

Location No. Part No. Description

A 75007869 LCD Panel, 32" LGD

B001

B001B 75007870 LCD Panel, 32" AUO

A 75006036 LDVS Cable

MZ01

MZ01B 75007893 LDVS Cable

U06A

KEY

U05A

MAIN (DIGITAL)

POWER

U03A

AC SW

U04A LED

U04B RMT

SAFETY INSTRUCTION

Always keep tools, components of the product, etc away from the children, These items

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WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "SAFETY

PRECAUTION" AND "PRODUCT SAFETY NOTICE" INSTRUCTIONS BELOW.

Safety Precaution

WARNING: SERVICING SHOULD NOT BE ATTEMPTED BY ANYONE

UNFAMILIAR WITH THE NECESSARY PRECAUTIONS ON THIS RECEIVER.

THE FOLLOWING ARE THE NECESSARY PRECAUTIONS TO BE OBSERVED

BEFORE SERVICING THIS CHASSIS.

1. An isolation transformer should be connected in the power line between the receiver

and the AC line before any service is performed on the receiver.

2. Always disconnect the power plug before any disassembling of the product. It may

result in electrical shock.

3. When replacing a chassis in the cabinet, always be certain that all the protective

devices are put back in place, such as nonmetallic control knobs, insulating covers,

shields, isolation resistor-capacitor network, etc.

4.

may cause injury to children.

5. Depending on the model, use an isolation transformer or wear suitable gloves when

servicing with the power on, and disconnect the power plug to avoid electrical shock

when replacing parts. In some cases, alternating current is also impressed in the

chassis, so electrical shock is possible if the chassis is contacted with the power on.

6. Always use the replacement parts specified for the particular model when making

repairs. The parts used in products require special safety characteristics such as

inflammability, voltage resistance, etc. therefore, use only replacement parts that have

NEVER remodel the product in any way. Remodeling can result in improper operation,

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these same characteristics. Use only the specified parts when the mark is indicated
in the circuit diagram or parts list.

7. Parts mounting and routing dressing of wirings should be the same as that used

originally. For safety purposes, insulating materials such as isolation tube or tape are

sometimes used and printed circuit boards are sometimes mounted floating. Also make

sure that wirings is routed and clamped to avoid parts that generate heat and which use

high voltage. Always follow the manufactured wiring routes / dressings.

8. Always ensure that all internal wirings are in accordance before re-assembling the

external casing after a repairing completed. Do not allow internal wiring to be pinched

by cabinets, panels, etc. Any error in reassembly or wiring can result in electrical

leakage, flame, etc., and may be hazardous.

9.

malfunction, or electrical leakage and flame, which may be hazardous.

10. Touch current check. (After completing the work, measure touch current to prevent an

electric shock.)



Plug the AC cord directly into the AC outlet. Do NOT use an isolation transformer

for this check.



Connect a measuring network for touch currents between each exposed metallic part

on the set and a good earth ground such as a water pipe.

Annex D

(normative)

Measuring network for TOUCH CURRENTS

Resistance values in orms (Ω).

V: Voltmeter or oscilloscope

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(r.m.s. or peak reading)

Input resistance : 1 MΩ
Input capacitance : 200 pF

Frequency range : 15 Hz to 1 MHz and d.c. respectively

Note: Appropriate measures should be taken to obtain the correct value in case of non

sinusoidal waveforms.

The measuring instrument is calibrated by comparing the frequency factor of with the
solid line in figure F.2 of IEC 60990 at various frequencies. A calibration curve is
constructed showing the deviation of from the ideal curve as a function of frequency.

TOUCH CURRENT = /500 (peak value).



The potential at any point (TOUCH CURRENT) expressed as voltage and
does not exceed the following value:

The part or contact of a TERMINAL is not HAZARDOUS LIVE if:

a) The open-circuit voltage should not exceed 35 V (peak) a.c. or 60 V d.c. or, if a) is not

met.

b) The measurement of the TOUCH CURRENT shall be carried out in accordance with

IEC 60990, with the measuring network described in Annex D of this standard.

The TOUCH CURRENT expressed as voltages and , does not exceed the
following values:

- for a.c. : = 35 V (peak) and = 0.35 V (peak);

- for d.c. : = 1.0 V

Note: The limit values of = 0.35 V (peak) for a.c. and = 1.0 V for d.c. correspond to
the values 0.7 mA (peak) a.c. and 2.0 mA d.c.

Product Safety Notice

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Many electrical and mechanical parts in this chassis have special safety-related

characteristics. These characteristics are often passed unnoticed by a visual inspection and

the protection afforded by them cannot necessarily be obtained by using replacement

components rated for higher voltage, wattage, etc. Replacement parts which have these

special safety characteristics are identified in this manual and its supplements; electrical

components having such features are identified by the international hazard symbols on the

schematic diagram and the parts list.

Before replacing any of these components, read the parts list in this manual carefully. The

use of substitute replacement parts which do not have the same safety characteristics as

specified in the parts list may create electrical shock, fire, or other hazards.

SPECIFICATION

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Non

UAR

T

REQ

I2C

HDM

I

HDMI3

S

I

F

ATV(V

)

REMOTE

OUT

HDMI2

HDMI1

SPDIF

SCL/SDA

12V

RECEIVER

OPTICAL
SENSOR

MAIN BOARD

RF

CVBS

R/G/B/FB

EXT1

LR

(SCART)

TVOUT V

TVOUT L/R

CVBS/S(Y/C)

LR

EXT2
(SCART)

TVOUT V

TVOUT L/ R

Y/Cb/Cr

EXT3
(REAR)

L/R

EXT7

R/G/B/H/V

PC

L/RPC/HDMI

LCD

DDRII RAM*2

TIF

75ohm

75ohm
Driver

Driver

Standby

uCON

CVBS/RGBFB/SY/SC/(Y/C b/Cr) or (RGBHV)

656

FLI32626

Sequoia

(16port)

YCbCr 16bit

AMP

Analog

Front

End

Digital

Input A

HDMI

ADC

VBI Data

Processor

Video

Decoder

Audio

Mux

I2S

I2C

Audio

DSP

MUX

DCDi
MADi

Scaling

OSD

BEP

LVDS

TCON

PANEL I/F

I2C

EEPROM

GPIO

Micro-

IR I/F

processor

ADC

SPI SERIAL

FLASH ROM

Low

DAC

Power
Monitor

PANEL

AUDIO

L/R

Bt601 8Bit

HD,VD,CLK

CVBS/S(Y/C)

EXT3
(FRONT)

L/R

Headphone (L /R)

TACT
KEY

HP AMP

MTS+

APRO

MSP

AUDIO AMP

SPEAKER (L/R)

KEY
ROM

EDID
ROM

EXT4

POWER BOARD

AC INPUT

SW

EXT5

CIRCUIT

PFC

HDMI

EDID
ROM

EXT6

Standby
POWER

HIC

EDID
ROM

5V1

5V1

CONVERTER

TRANS

Sequoia

Regulator

5V2

12V

P811B

5V2D

32V

9V

LOWB Regulator

VCC AU DIO

P811C

18V_AUDIO

24V

18V AU DIO

12V_ L CD

12V_LCD

REG

P810B

24V

12V_LCD

SCHEMATIC DIAGRAM

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Precaution

WARNING: BEFORE SERVICING THIS CHASSIS, READ THE "X-RAY

RADIATION PRECAUTION" FOR DIRECT VIEW CTV ONLY, "SAFETY

PRECAUTION" AND "PRODUCT SAFETY NOTICE" OF THIS MANUAL.

CAUTION: The international hazard symbols " " in the schematic diagram
and the parts list designate components which have special characteristics

important for safety and should be replaced only with types identical to

those in the original circuit or specified in the parts list.

The mounting position of replacements is to be identical with originals.

Before replacing any of these components, read carefully the SAFETY

PRECAUTION and PRODUCT SAFETY NOTICE.

Do not degrade the safety of the receiver through improper servicing.

Note:

1. RESISTOR

Resistance is shown in ohm [K=1,000, M=1,000,000]. All resistors are 1/6 W and 5 %

tolerance carbon resistor, unless otherwise noted as the following marks.

1/2R : Metal or Metal oxide of 1/2 watt

1/2S : Carbon composition of 1/2 watt

1RF : Fuse resistor of 1 watt

10 W : Cement of 10 watt

K : ±10 %

G : ±2 %

F : ±1 %

2. CAPACITOR

Unless otherwise noted in schematic, all capacitor values less than 1 are expressed in

µF, and the values more than 1 in pF.

All capacitors are ceramic 50 V, unless otherwise noted as the following marks.

= Electrolytic capacitor

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= Mylar capacitor

3. The parts indicated with " " have special characteristics, and should be replaced with
identical parts only.

4. Voltages read with DIGITAL MULTI-METER from point indicated to chassis ground,

using a color bar signal with all controls at normal, line voltage at nominal AC volts.

5. Waveforms are taken receiving color bar signal with enough sensitivity.

6. Voltage reading shown are nominal values and may vary ±20 % except H.V.