Toshiba 23HLV85 Schematic
FILE NO. 050-200532
DOCUMENT CREATED IN JAPAN, Sept., 2005
SERVICE MANUAL
LCD Color Television
23HLV85
TOSHIBA CORPORATION 2005
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Published in Japan, Sep. 2005 (YC)
TABLE OF CONTENTS
SERVICE SAFETY PRECAUTIONS ..........................................................................................................................................3
HANDLING THE LCD MODULE ................................................................................................................................................ 5
1. SERVICE MODE .................................................................................................................................................................... 7
1-1. STARTING SERVICE MODE ...........................................................................................................................................7
2. ADJUSTMENT ....................................................................................................................................................................... 8
2-1. ADJUSTMENT TOOLS AND CONDITIONS ................................................................................................................... 8
2-2. AUTO GAIN/OFFSET ADJUSTMENT .............................................................................................................................8
2-3. DDC EDID DATA READ & WRITE ...................................................................................................................................9
3. VCTI FIRMWARE INSTALLATIONS/UPGRADING ............................................................................................................. 19
3-1. VCTI FIRMWARE INSTALLATIONS ............................................................................................................................. 20
3-2. SCALER FIRMWARE INSTALLATIONS....................................................................................................................... 26
4. TROUBLESHOOTING......................................................................................................................................................... 33
5. EXPLODED VIEW ............................................................................................................................................................... 40
6. CHASSIS AND CABINET REPLACEMENT PARTS LIST .................................................................................................. 41
7. PC BOARDS TOP & BOTTOM VIEW.................................................................................................................................. 52
8. SCHEMATIC DIAGRAM ...................................................................................................................................................... 55
8-1. WIRING DIAGRAM ....................................................................................................................................................... 56
8-2. BLOCK DIAGRAM ........................................................................................................................................................ 57
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GENERAL ADJUSTMENTS
SPECIFIC INFORMATIONS
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
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
The example shown to the left indicates that disassembly is forbidden.
The
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indicates a forced action (an action that must be performed).
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.
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or nearby illustrations or text.
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KEEP CHILDREN
AWAY
UNPULUG
SHOCK HAZARD
USE SPECIFIED
PARTS
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
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HANDLING THE LCD MODULE
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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 water. 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
CAUTION
The LCD module can easily be damaged during disassembly
or reassembly; therefore, always observe the following precautions when handling the module.
1. When attaching the LCD module to the LCD cover, position it appropriately and fasten at the position where the
display can be viewed most conveniently.
The metal edges of the LCD module
are sharp, handle it with care.
3. If the panel surface becomes soiled, wipe with cotton or
soft cloth. If this does not remove the soiling, breathe o
the surface and then wipe again.
If the panel surface is extremely solied, use a CRT cleane
as a cleaner. Wipe off the panel surface by drop the cleane
on the cloth. Do not drop the cleaner on the panel. Pa
attention not to scratch the panel surface.
4. Leaving water or other fluids on the panel screen for a
extended period of time can result in discoloration o
stripes. Immediately remove any type of fluid from th
screen.
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.
5. Glass is used in the panel, so do not drop or strike wit
hard objects. Such actions can damage the panel.
6. CMOS-LSI circuitry is used in the LCD module, so avoi
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 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.
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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1.Service Mode
1-1.Starting Service Mode
*Set LCD TV to the normal TV signal receive mode.
Note: In this "Service Mode" section, [ ] shows a button.
1-1-1. Press [MUTE] on the remote control once.
1-1-2. Press [MUTE] again, and press [
Service mode displayed on TV screen
Items other than those enclosed by are default
settings.
] on LCD TV.
VCTi version
Scaler version
Item Default setting
3D Comb Filter 1
HDTV 1
PC Information 1
Speaker Outout 0
FLI2310 1
Country 2
Canadian Vchip 0
BS 0
Module Option 0
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2. Adjustment
Note: In this "Adjustment" section, [ ] shows a button.
2-1.Adjustment Tools and Conditions
Tools: Pattern Generator (801GF, MSPG925F)
DDC Adjustment Tool
PC
Remote Control
Conditions: Heat Run 30 minutes or more
2-2. Auto Gain/Offset Adjustment
2-2-1. RF Mode Adjustment (normal TV receive mode)
No reguired
2-2-2. Component Mode Adjustment
Preparation
Carry out Heat Run for 30 minutes or more before adjustment
(with no RF signal).
1) Connect Y, Pb, and Pr output signals of Pattern Generator
to the component jack (Y, Pb, Pr) of LCD TV.
2) Connect Y, Pb, and Pr output signals of Pattern Generator
to the component jack (D Jack) of LCD TV.
3) Change the TV input mode to component mode.
4) Select 480p Mode (Y:100% Pb/Pr:75%) in Pattern Generator. Select Pattern 33 (Color Bar Pattern
signal) in Pattern Generator (MSPG925F).
5) Go into service mode, and Auto Gain menu appears, and then press VOL [+].
6) Press [OK] to store the adjustment data.
(Adjustment in component mode or PC mode)
2-2-3. PC Mode Adjustment
Preparation
Carry out Heat Run for 30 minutes or more before adjustment (with no RF signal).
Connect Pattern Generator to the 15-pin D-Sub Jack of LCD TV.
1) Change the TV input mode to PC mode.
2) Set Pattern Generator to the following:
XGA (1024x768) 16-step or 11-step grayscale
3) Go into service mode, and Auto Gain menu appears, and then press VOL [+].
4) Press [ENTER] to store the adjustment data.
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4. TROUBLESHOOTING
Process A
No Power
(LED indicator off)
Ref.1/1-1
Check 15V or ST_5V
of Power B/D
Fail
No Power
(LED indicator off)
Pass
Check Output of
IC1105, IC1104 or
IC1106,IC1103
Pass
Check LED Assy
Pass
Check P51 Connector
Fail
Fail
Check Output of
IC1000, IC1001
Change IC1105, IC1104 or
IC1106, IC1103
Change LED Assy
Change IC1000, IC1001
Fail
ST_5V : P1000, #1Ref.1 15V : P1000, #14, 15Ref.1-1
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No Raster on Component
signal
Repeat Process A
Pass
Check the signal of
R178, R179, R180
Pass
Ref.2/2-1
Check the input/ output
Pass
Check the input/ output
Pass
Check the input/ output
of IC400
of IC450
of IC501
Process C
Fail
Fail
Fail
Fail
Change R178, R179, R180
Re-soldering or Change
the defect part Check
IC400
Re-soldering or Change
the defect part Check
IC450,X450,IC451
Re-soldering or Change
the defect part Check
IC501,X500, IC701
Ref.2
Check input source cable
and jack
Component V signal Output :
IC400, #64
Ref.2-1
Component H signal Output :
IC400, #66
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No Raster on SIDE-AV
signal(SIDE-AV,VIDEO1)
No Raster on TV(RF) signal
Repeat Process A
Pass
Check the signal of
R13, R177
Pass
Check the input/output
Pass
Ref.3
Check the input/output
Pass
IC200
IC300
Check the output of
Fail Fail
Check P50,JA100
Fail
Re-soldering or change
Fail
Fail
defect part check
IC200,X200
Re-soldering or change
defect part check
IC300,3200
TU100
Pass
Check 5V,33V of
TU100, Re-soldering of
Change the defect part
Ref.4
Check the input/output
Pass
Process C
IC200
Ref.3
Y separated output :
IC300, #96
Ref.4
ITU 656 Clock out :
IC200, #83
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No Raster on DVD Signal
No Raster on S-VIDEO
Signal
Repeat Process A
Pass
Ref.5 Ref.6
Check the signal of
L214,L215,L216
Pass
Check the input/output
IC200
Pass
Fail
Check P53,P1001 or P202
Fail
Fail
Check the signal of R11, R12
Re-soldering or change
defect part check
IC200,X200
Process C
Repeat Process A
Pass
Y signal input : IC200, #62Ref.6Y signal input : IC200, #68Ref.5
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No Raster on HDMI signal
No Raster on PC signal
Ref.7
Repeat Process A
Pass
Ref.7/7-1
Check the input/output
IC600
Pass
Process C
HDMI H Signal output :
IC600, #2
Fail
Ref.7-1
Re-soldering or change
defect part check IC600
Fail
Re-soldering or
change defect part
check IC501,X500,IC701
PC H Signal Input :
IC501, #181
Repeat Process A
Pass
Ref.8/8-1
Check the input/output
IC501
Pass
Check input source cable
and jack
Ref.8
HDMI V Signal output :
IC600, #3
Ref.8-1
PC V Signal input :
IC501, #182
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No Sound (SIDE AV,DVD)
Pass
No Sound (RF)
Check the input
source
Pass
Check the input/output
of IC901
Pass
Check the input/ output
of IC200
Pass
Ref.9
Check the input/ output
of IC900
Pass
Fail
Fail
Fail
Process D
Fail
Fail
Change source input
Re-soldering or Change
the defect part Check
IC901
Re-soldering or Change
the defect part Check
IC200,X200
Re-soldering or Change
the defect part Check IC900
Check the speaker
Pass
Check the speaker wire
Fail
Change the speaker
Ref.9
Sound Input :
IC900, #3, 5
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No Sound HDMI
No Sound Component & PC
Check the input source Check the input source
Pass
Check the input/output
IC650
Pass
Check the input/output
IC801
Pass
Fail Fail
Change source input
Fail
Re-soldering or
change the defect
part ic650
Fail Fail
Re-soldering or
change the defect
part IC800 & IC801
Pass
Check the input/output
IC800
Pass
Process D
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5. EXPLODED VIEWS
23HLV85
030
050
020
130
Y151
090
120
080
110
100
140
010
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040
150
170
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