Toshiba 42HP83SVM Schematic

FILE NO. 010-200314

DOCUMENT CREATED IN JAPAN, Nov., 2003

SERVICE MANUAL

P lasma Color Television

42HP83

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

TABLE OF CONTENTS

SERVICE SAFETY PRECAUTIONS....................................................................................................................................3

IMPORTANT INFORMATION...............................................................................................................................................5

CLEANING...........................................................................................................................................................................6

LOCATION OF CONTROLS ................................................................................................................................................7

LAYOUT OF MAJOR BOARDS............................................................................................................................................ 9

MECHANICAL DISASSEMBLY..........................................................................................................................................10

GENERAL ADJUSTMENTS

EXPLODED VIEW .............................................................................................................................................................16

PACKING DISASSEMBLY..................................................................................................................................................17

TROUBLESHOOTING.......................................................................................................................................................18

CHASSIS AND CABINET REPLACEMENT PARTS LIST ................................................................................................. 20

PC BOARDS ......................................................................................................................................................................29

SPECIFICATIONS.......................................................................................................................................................... END

APPENDIX:

SCHEMATIC DIAGRAM

SPECIFIC INFORMATIONS

– 2 –

SERVICE SAFETY PRECAUTIONS

• The caution items shown here describe major safety issues and should always be observed.

• The meanings of the various indications are as follows.

WARNING

CAUTION

* Physical damage means major damage to a home, furnishings and other possessions.

Examples of marks

SHOCK HAZARD

PROHIBIT DISASSEM-

BLING

UNPULUG

Indicates a hypothetical situation in which service personnel and nearby third parties, or even
end users due to a product defect after the service operation is completed, could possibly be in
danger of injury or even death in the event of operational error.

Indicates a hypothetical situation in which service personnel and nearby third parties, or even
end users after the service operation is completed, could possibly be in danger of injury, or
where there could be physical damage in the event of operational error.

The" indicates caution (including danger and warning).
The actual meaning of this caution is indicated inside the " or nearby illustrations or text.
The example shown to the left indicates the danger of "electrical shock".

indicates a forbidden action.

The
The actual meaning of this caution is indicated inside the
The example shown to the left indicates that disassembly is forbidden.

- indicates a forced action (an action that must be performed).

The
The actual meaning of this forced action is indicated by
The example shown to the left indicates that the power plug must be disconnected.

or nearby illustrations or text.

- or nearby illustrations or text.

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

– 3 –

KEEP CHILDREN

AWAY

GENERAL ADJUSTMENTS

UNPULUG

SHOCK HAZARD

USE SPECIFIED

PARTS

SPECIFIC INFORMATIONS

CAUTION FOR

WIRING

CAUTION FOR

ASSEMBLING /

WIRING

WARNING

• Always advise users to keep children away.
There is danger of injury to children from tools, disassembled products, etc.

• Always disconnect the power plug before starting work whenever power is not required.
Failure to disconnect the power plug before starting work can result in electrical shock.

• Depending on the model, use an insulation transformer or wear 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.

• Always use the replacement parts specified for the particular model when making repairs.
The parts used in products have the necessary safety characteristics such as inflammability,
voltage resistance, etc.; therefore, use only replacement parts that have these same character­istics.
Use only the specified parts when the

• Parts mounting and routing of the wiring should be the same as that used originally.
For safety purposes, insulating materials such as tubing or tape is sometimes used and printed
circuit boards are sometimes mounted floating.
Also make sure that wiring is routed and clamped to avoid parts that generate heat and which
use high voltage. Always follow the original scheme.

• After a repair has been completed, reassemble all disassembled parts, and route and recon­nect the wiring, in accordance with the original scheme.
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.

mark is included in a circuit diagram or parts list.

CHECK INSULATION

RESISTANCE

PROHIBIT

REMODELING

• After completing the work, disconnect the power plug from the outlet, remove the antenna, turn
on the power switch. Then, use a 500V insulation resistance meter to check the insulation
resistance of the antenna terminal, other metallic parts and between the prongs of the power
plug to make sure that the insulation resistance is 1M 1 or more.
The set will require inspection and repair if the insulation resistance is below this value.

• Never remodel the product in any way.
Remodeling can result in improper operation, malfunction, or electrical leakage and flame,
which may be hazardous

– 4 –

IMPORTANT INFORMATION

About Permanent after-image

• Due to the characteristics of a plasma screen, if the same image is displayed for an extended period
of time, permanent after-image (image retention) in part of the screen may result. As a result of accu­mulative effect, brightness deterioration results.
To prevent permanent after-image, it is recommended not to display the same image for an extended

After-image appear

Note on operations in 4:3 mode

• In 4:3 mode, because of the sharp contrast between the displayed image area and non-displayed image area (frame),
permanent after-image is likely to result.
Therefore, we recommend adjusting the TV settings as follows:

1.Reduce “Contrast” and “Brightness” of the picture. The more you reduce, the more effect is effective.

2. Adjust the brightness of the side panels. The more you turn the brightness high, the more effect is effective.
However, after adjusting the above settings, permanent after-image may not be removed entirely; only the onset of after­image is delayed. Display your TV in Super Live or Wide mode as much as possible.

Some parts of the screen do not light up

• The plasma display panel is manufactured using an extremely high level of precision technology, however sometimes
some parts of the screen may be missing picture elements or have luminous spots. This is not a sign of a malfunction.

About infrared rays

• The plasma screen of this unit emits infrared rays in normal operation, and may influence some infrared-operated equip­ment by a use state although the measures of infrared ray (filter, etc.) are taken. Locate such equipment carefully to
prevent rays from the plasma screen causing any problems.

period of time, or in 4:3 mode. If retention occurs , displa y a mo ving picture like a video mo vie. This ma y
help to reduce minor permanent after-image. But it cannot be remov ed entirely once it has occurred. If
the same static picture is displayed frequently, it is recommended to decrease “Brightness,” or to
adjust the Long life setting.

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

About Interference

• Plasma display may cause interference in image, sound, etc. of other electronic equipment that is easy to receiv e electro­magnetic waves (i.e. AM radios and video equipment) under certain installed condition. In particular, it may affect elec­tronic equipment beyond the residential unit where a plasma display TV is used.

About Static electricity

• If you touch the surface of the screen panel, you may feel a slight electric shock. This is harmless.

About using under the low temperature places

• If you use the TV in the room of 0°C or less, the picture brightness may vary until the plasma monitor warms up. This is not
a sign of a malfunction.

About disposal

• Dispose the TV depending on the related local rules or laws.

– 5 –

Remove the power plug before cleaning.
Do not use solvents such as benzine or thinner to clean the TV.
– These solvents may distort the cabinet or damage its finish.
– If rubber or vinyl products remain in contact with the TV for a long

time, a stain may result.
When the cabinet becomes dirty, clean it with a soft, dry cloth.
When the cabinet is very dirty.
– Use a damp cloth to wipe the cabinet clean.

GENERAL ADJUSTMENTS

– Finish with a dry cloth.
When cleaning the surface of the plasma display:
– Wipe the panel surface gently with a supplied soft, dry cloth.

CLEANING

When dust has collected on the power plug connectors, remove the
plug from the outlet and clean off the dust.
This dust may cause a fire due to reduced insulation on the plug.

SPECIFIC INFORMATIONS

Clean here

– 6 –

LOCATION OF CONTROLS

TheaterLink
(IR pass
through)

Power indicator

TV front

Remote sensor

Push up Push up

Left pocket panel Right pocket panel

TV/VIDEO MENU VOLUME CHANNEL POWER

MENU

TV/VIDEO

Channel
Menu

Volume

VIDEO-3 IN

S-VIDEO VIDEO R

POWER

VIDEO-3

INPUT

AUDIO

L/MONO

Headphones
jack

HEADPHONE

Menu

Back

DVI/HDCP IN

DVI/HDCP IN

S-VIDEO

VIDEO

L/MONO

AUDIO

R

VIDEO 1

VIDEO 1/2

Wall outlet

120V AC

50/60Hz

DVI/HDCP

AUDIO IN

DVI/HDCP AUDIO IN

R

L

Y

P

B

L

AUDIO

P

R

R

COLOR

STREAM

HD-1

COLOR

STREAM

HD-2

VIDEO 2

IN IN IN

ColorStream
HD-1

ColorStream
HD-2

ANT-1 IN

VIDEO

Y

L/MONO

P

B

L

AUDIORAUDIO

P

R

R R

OUT

VIDEO/

AUDIO OUT

Variable
AUDIO OUT

ANT OUT

ANT-1

ANT(75

VAR
AUDIO

L

OUT

TheaterLink

TheaterLink
OUT

Power Cord

ANT-2 IN

OUT

ANT-2

)

AC IN

– 7 –

Remote Control

POWER turns the TV on and off.
SLEEP allows access to the automatic TV shut-off function .
LIGHT The first press of the LIGHT button lights the keypad and turns on

the Illumination mode. With the Illumination mode on, pressing an y
other key lights the keypad for 5 seconds (10 seconds if you’re in
programming mode).
Subsequent presses of the LIGHT button toggle between turning
the Illumination mode on and off.

Channel Numbers (0-9, 100) allow direct access to channels.
MODE cycles through the six de vice modes: TV, CABLE/SAT, VCR, DVD,

AUDIO1, and AUDIO2. The mode indicator light will remain lit f or a
few seconds.

PIC SIZE cycles through the five pictures sizes: Natural, Theater Wide 1,

2, 3, and Full.

FAVORITE allows access to the favorite channel search function
.

MENU allows access to on-screen programming menus.
ENTER sets programming menu information.

select or adjust programming menus.

FAV cycles through favorite channels.

CH
VOL adjusts the volume level.
EXIT exits the programming menus.
INPUT selects the video input source.
MUTE mutes the sound.
RECALL displays on-screen information.
CH RTN returns to the last viewed channels.
POP CH selects the POP (picture-out-picture) channel.
SPLIT turns the POP feature on and off.
CH SCAN allows access to the programmed channel search function

.

FREEZE freezes the POP picture.
SWAP switches the main and POP pictures.

cycles through programmed channels.

Note:
The error message "Not Available" will appear
if you press a key for a function that is not
available.

POP DIRECT CH allows direct access to POP channels
.
SOURCE selects the POP picture source.

– 8 –

LAYOUT OF MAJOR BOARDS

E001

SCALER BLOCK

U003

LOWB1 Board

U006C

OSD/MICON

U006E

G-HYPER Module

U800

MAIN POWER Module

U004

LOWB2 Board

U005

A-OUT Board

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

U006A

FRONT/AV Board

U801

SUB POWER Module

E003

DVI Board

U001A

SIGNAL Board
(Control Board)

U002

BACK AV Board

U006B

KEY Board

U001C

IR-PASSTHROUGH Board

U001B

TN/IMA Board

– 9 –

■ Removing the rear cover

Note: Be sure to lay down the main body (by placing its screen downward) for disassembling.

*

• Remove 25 screws (A).

• Remove 16 screws (B).

• Remove 6 screws (C).

GENERAL ADJUSTMENTS

MECHANICAL DISASSEMBLY

A

B

SPECIFIC INFORMATIONS

C

– 10 –

■ Removing the speakers

Remove 4 screws.

Remove 2 screws.

Remove 4 screws.

Remove 4 screws.

Remove 2 screws.

Remove 4 screws.

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

– 11 –

■ Removing the back terminal panel

• Remove 9 screws encircled in red.

• Remove 4 screws enclosed in red squares.

GENERAL ADJUSTMENTS

■ Removing the BACK/AV board

• Remove 2 screws.

SPECIFIC INFORMATIONS

BACK/AV Board TIF-MA Board

– 12 –

■ Removing the A-OUT board and SUB POWER UNIT

SUB POWER UNIT

A-OUT board

GENERAL ADJUSTMENTS

SPECIFIC INFORMATIONS

Remove 4 screws.Remove 6 screws.

– 13 –