Toshiba 32HL83 User manual

GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
FILE NO. 010-200312
SERVICE MANUAL
PUBLISHED IN JAPAN, Nov. 2003 So
LCD Color Television
32HL83

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TABLE OF CONTENTS
SERVICE SAFETY PRECAUTIONS .................................................................................................................................... 3
HANDLING THE LCD MODULE .......................................................................................................................................... 5
SERVICE MODE.................................................................................................................................................................. 7
TROUBLESHOOTING DIAGNOSIS FUNCTION ................................................................................................................ 8
LOCATION OF CONTROLS .............................................................................................................................................. 10
LAYOUT OF MAJOR BOARDS ......................................................................................................................................... 12
MECHANICAL DISASSEMBLY ......................................................................................................................................... 13
EXPLODED VIEW ............................................................................................................................................................. 25
PACKING DISASSEMBLY ................................................................................................................................................. 26
CHASSIS AND CABINET REPLACEMENT PARTS LIST ................................................................................................. 27
PC BOARDS BOTTOM VIEW ........................................................................................................................................... 35
SPECIFICATIONS.......................................................................................................................................................... END
APPENDIX:
SCHEMATIC DIAGRAM

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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
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.
*Physical damage means major damage to a home, furnishings and other possessions.
Examples of marks
SHOCKHAZARD
PROHIBIT DISASSEM-
BLING
UNPLUG
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".
The indicates a forbidden action.
The actual meaning of this caution is indicated inside the or nearby illustrations or text.
The example shown to the left indicates that disassembly is forbidden.
The -indicates a forced action (an action that must be performed).
The actual meaning of this forced action is indicated by -or nearby illustrations or text.
The example shown to the left indicates that the power plug must be disconnected.

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WARNING
KEEPCHILDREN
AWAY
UNPULUG
SHOCKHAZARD
USE SPECIFIED
PARTS
CAUTION FOR
WIRING
CAUTION FOR
ASSEMBLING /
WIRING
CHECK INSULATION
RESISTANCE
PROHIBIT
REMODELING
•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 pos-
sible 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 character-
istics.
Use only the specified parts when the mark is included in a circuit diagram or parts list.
•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 recon-
nect 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.
•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 Ωor 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

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HANDLING THE LCD MODULE
Safety Precautions
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
should enter the mouth, rinse the mouth thoroughly with wa-
ter. If the fluid should contact the 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
The LCD module can easily be damaged during disassembly
or reassembly; therefore, always observe the following pre-
cautions when handling the module.
1. When attaching the LCD module to the LCD cover, posi-
tion it appropriately and fasten 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 mod-
ule because any impact can adversely affect the perform-
ance. Also use caution when handling the polarized screen
because it can easily be damaged.
CAUTION The metal edges of the LCD module
are sharp, so use caution to avoid in-
jury.
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 electricity. When handling the mod-
ule, use a wrist ground or anchor ground.

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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 con-
ditions 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.
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.

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SERVICE MODE
ENTERING TO SERVICE MODE
1) Press the "MUTE" button once on the remote control, "1/2 MUTE" is displayed on the screen.
2) Press the "MUTE" button again, "MUTE" is displayed on the screen.
3) Press the "MENU" button on the TV while pressing the "MUTE" button on the remote control, "S" may appear
on the screen. Then enter to the service mode.
4) Press the "MENU" button on the remote control, adjustment item appears on the screen.
NOTE
Adjustment items may change by pressing the "CH " buttons on the remote control.
1) 2) 3) 4)
* EXIT FROM SERVICE MODE-Turn off the "POWER" of the TV or remote control.
Built-in signal
.When press the "INPUT" source selection button on the remote controller during service mode,
generate the built-in test video signal for servicing.
Built-in test video signal (Use for the adjustment such as white balance, etc.)
General broadcasting signal => red monochrome => green monochrome
=> blue monochrome => white signal => black cross bar => built-in signal OFF
CAUTION
For the video system adjustment, never attempt to initialize the data unless initial setting data is exceed
incorrectly.
Adjustment items
Brightness correction
(BRTC)
White balance
(RCUT) (GCUT) (BCUT)
Adjustment procedure
1) Receive a general broadcasting program, then press "MENU" button on the
remote control, set the unicolor to minimum (00) and brightness to standard (00)
in order to display the "Setting menu" => "Picture setting" => "Picture adjust-
ment" by pressing the cursor buttons " ".
2) Select BRTC (brightness correction) using the cursor buttons "CH " on the
remote control, fine adjust the black signal to be black using the "VOL "
buttons on the remote control. After the adjustment, set "unicolor" back to
initialize data.
1) Enter the service mode, press the "INPUT" source setting button on the remote
control to generate the built-in white signal.
2) Adjust the data of items RCUT, GCUT and BCUT for proper white-balanced
picture in low light area.
* For high light area, GDRV and RDRV items can be adjusted for proper white-balanced picture.
1/2 mute mute
SRCUT
60H
(Service mode screen)

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TROUBLESHOOTING DIAGNOSIS FUNCTION
1. DIAGNOSIS FUNCTION FOR LED INDICATION
High : Lighting Low : No Lighting
CAUSE
Short-circuit detection of BUS line
BUS line may possibly be short-circuit (SDA to SCL), or BUS line (SDA,
SCL) is grounded.
Overcurrent limiter detection
POWER terminal on TV microprocessor becomes LOW at 2 seconds or
more.
Interruption of FAN motor function detection
No. 53 terminal on TV microprocessor becomes HIGH for 30 seconds.
Abnormal sound detection
P4 terminal of QS10 becomes LOW for 15 seconds during Speaker is
activated.
LED
LED is lit in 1 second at
intervals of 1 second.
LED is lit in 0.5 at intervals
of 0.5 second.
LED is lit in 0.25 second at
intervals of 2 second.
LED is lit in 5 seconds at
intervals of 5 seconds.

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2. SELF DIAGNOSIS FUNCTION
1) Press "9" button on the remote control during display of adjustment menu in the service mode.
2) During diagnosis, the following displays are shown.
<SELF CHECK>
Part number of microprocessor
Operation number of protecting circuit ------"00" is normal.
When indication is other than "00", overcurrent is apt to flow, and circuit parts may possibly be dam-
aged.
BUS LINE ------"OK" is normal.
When indication shows "NG (Green: OK, Red: NG)", the BUS line may possibly be short-circuit.
BUS CONT------"OK" is normal.
When indication shows "Q uuu (Green: OK, Red: NG )", the device with the number may possibly be
damaged.
BLOCK
MAIN : Main picture display --Green indication
Main picture does not display--Red indication
SUB : Sub picture display --Green indication
Sub picture does not display--Red indication
ID number of this unit.
EEP of soft version information
Data number of OPT1 and OPT2
Software version information of host microprocessor (date indication)
DVI NO : DVI number information
DVI ERR CODE : DVI status code number
BEP SW VER : Software version information for BEP microprocessor
BEP E2P VER : Software version information for BEP E2P
Total hour of turn the TV on. (Unit: hour)
*INITIALIZATION OF SELF DIAGNOSIS DATA
1) Enter the service mode, then select any register item.
2) Press and hold the RECALL button on the remote control, then press the CHANNEL up button on the TV. The
initialization has been completed.

GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
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LOCATION OF CONTROLS
L / MONO
S-VIDEO
VIDEO 1 VIDEO 2
VIDEO
RR
L
COLOR
STREAM
HD-1
COLOR
STREAM
HD-2
RL
PB
PR
Y
ANT 1 ANT 2 OUT
VIDEO
VAR
AUDIO
ANT( 75 )
AUDIO AUDIO
RRR
LL
PB
PR
Y
AUDIO AUDIO
L / MONO
IN IN IN OUT TheaterLink OUT
DVI/HDCP
AUDIO IN
DVI/HDCO IN
TV/VIDEO MENU VOLUME CHANNEL POWER
POMER
POMER
VIDEO-3 IN
HEADPHONE
AUDIO
S-VIDEO VIDEO RL/MONO
Back
DVI/HDCP
TV front
DVI/HDCP
AUDIO IN
Volume
Menu Channel
Menu
MENU
ANT-1 IN
Remote sensor
POWER
VIDEO-3
INPUT
TV/VIDEO
Headphones
jack
Power
indicator
Push up Push up
ANT-2 IN
ANT OUT
VIDEO 1/2
ColorStream
HD-1 ColorStream
HD-2
VIDEO/
AUDIO OUT
Variable
AUDIO OUT
TheaterLink
OUT
TheaterLink
(IR pass through)
Left pocket panel Right pocket panel

GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
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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 any
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 device modes: TV, CABLE/SAT, VCR, DVD,
AUDIO1, and AUDIO2. The mode indicator light will remain lit for 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 cycles through programmed channels.
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.
POP DIRECT CH allows direct access to POP channels
.
SOURCE selects the POP picture source.
Note:
The error message "Not Available" will appear
if you press a key for a function that is not
available.

GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
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LAYOUT OF MAJOR BOARDS
U800
SWG POWER Module
U003A
FRONT/AV Board
U003B
KEY Board
U002C
IR/LED Board
E003
DVI Board
U002A
BACK/AV Board
U001A
TN/MA Board
H003
ANTENNA SW U001B
SIGNAL Board
U801
DD POWER Module
U003E
G-HYPER Module
U002B
A-OUT Board
E001
SCALER &
OSD/MICON Module

SPECIFIC INFORMATIONS
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MECHANICAL DISASSEMBLY
■Removing the rear cover
*Note: Be sure to lay down the main body (by placing its screen downward) for disassembling.
•Remove 16 screws ( : 4✕12).
•Remove 4 screws ( : 6✕16).
•Remove 2 screws ( : 3✕12).
•Remove a screw ( : 3✕8).

GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
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■Removing the brackets
•Remove 29 screws ( : 3✕5).
•Remove 4 screws ( : 4✕12).

SPECIFIC INFORMATIONS
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■Removing the G-HYPER Module
•Remove the FAN. (2 screws E)
•Remove the braket. (3 screws F)
•Remove the 2 screws G.
F
EG

GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
– 16 –
■Removing the FRONT/AV board and KEY board
U
FRONT/AV Board
KEY
Board
V

SPECIFIC INFORMATIONS
– 17 –
■Removing the A-OUT board
•Remove 4 screws (H).
H

GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
– 18 –
■Removing the SCALER & OSD/MICON module
•Remove 4 screws (J).
•Remove 3 connectors.
J
J
Disconnect
Disconnect

SPECIFIC INFORMATIONS
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■Removing the SIGNAL board
•Remove 4 screws (K) on the SIGNAL board.
K
SIGNAL Board

GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
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■Removing the IR/LED board
•Remove 2 screws (L) on the the IR/LED board.
L
IR/LED Board