13.50. SS, SS2, SS3 and S1-Board Schematic Diagrams
14 Parts Location
15 Mech anica l Replaceme nt Parts List
15.1. US model
15.2. Except US model
16 Repla ceme nt Parts List
16.1. Relpacement Parts List Notes
16.2. US model Electrical Replacement Parts List
16.3. Expect US model Electrical Replacement Parts List
16.4. Option (TY-42TM4H) Replacement Parts List
16.5. Option (TY-42TM4Y) Replacement Parts List
16.6. Option (TY-42TM4Z) Replacement Parts List
TH-42PW4 / TH-42PWD4
117
118
119
120
121
123
123
123
126
126
127
145
166
167
170
3
Page 4
TH-42PW4 / TH-42PWD4
1 Safety Precautions
1.1. General Guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
1.1.1. Leakage Current Cold Check
1. Unplug the AC cord and connect a jumper between the two
prongs on the plug.
2. Measure the resistance value, with an ohmmeter, between
the jumpered AC plug and each exposed metallic cabinet
part on the equipment such as screwheads, connectors,
control shafts, etc. When the exposed metallic part has a
return path to the chassis, the reading should be between
1MΩ and 5.2MΩ.
When the exposed metal does not have a return path to
the chassis, the reading must be
.
Figure 1
1.1.2. Leakage Current Hot Check (See
Figure 1.)
1. Plug the AC cord directly into the AC outlet. Do not use an
isolation transformer for this check.
2. Connect a 1.5kΩ, 10 watts resistor, in parallel with a 0.15µF
capacitors, between each exposed metallic part on the set
and a good earth ground such as a water pipe, as shown in
Figure 1.
3. Use an AC voltmeter, with 1000 ohms/volt or more
sensitivity, to measure the potential across the resistor.
4. Check each exposed metallic part, and measure the
voltage at each point.
5. Reverse the ACplugin the ACoutlet and repeat each of the
above measurements.
6. The potential at any point should not exceed 0.75 volts
RMS. A leakage current tester (Simpson Model 229 or
equivalent) may be used to make the hot checks, leakage
current must not exceed 1/2 milliamp. In case a
measurement is outside of the limits specified, there is a
possibility of a shock hazard, and the equipment should be
repaired and rechecked before it is returned to the
customer.
4
Page 5
TH-42PW4 / TH-42PWD4
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor "chip" components. The following techniques should be used to help reduce the incidence of component damage
caused by electro static discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on aconductive surface such as alminum
foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static (ESD protected)" can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, alminum foil or comparable
conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ESdevices. (Otherwise hamless motion such as the brushing
together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to
damage an ES device).
1. To remove P.C.B. , wait 1 minute after power was off for discharge from electrolysis capacitors.
6.4.2. Quick adjustment after P.C.B. exchange
P.C.B.ItemVolumeTest pointLevel
P boardPFCR426 (3) Except USP4 connector pin 1 400V ± 1 V
VsusR478 (P) US modelTPVsus (SS)175V ± 1 V
R625 (P3) Except US
VbkR505 (P) US modelTPVBK (SC)160V ± 5 V
R498 (P1) Except US
VdaR473 (P) US modelTPVDA (SS)67V ± 1 V
R519 (P1) Except US
SC boardVadR6477TPVAD (SC)-90 ± 1 V
SS boardVeR6774TPVE (SS)150 ± 1 V
D boardWhite balance, Pedestal and Sub brightness for NTSC, PAL, HD, PC and 625I signals.
6.5. Adjustment Volume Location
TH-42PW4 / TH-42PWD4
6.6. Test Point Location
11
Page 12
TH-42PW4 / TH-42PWD4
7 Serviceman mode
7.1. CAT (computer Aided Test) mode
To exit the CAT mode, access the ID mode and switch off the main power.
7.1.1. IIC mode
Select the IIC mode by Up/Down button on the remote control at the front page of CAT mode then press the Action button on
the remote control.
Subject and item are mentioned on page 14.
To exit the IIC mode, press the R button on the remote control.
12
Page 13
TH-42PW4 / TH-42PWD4
7.1.2. CD mode
Select the CD mode by Up/Down button on the remote control at the front page of CAT mode then press the Mute button on the
remote control more than 5 sec.
Micom software version ( IC9705 / TVRJ562), this version can be upgrade by
1. replace of new version IC
2. Loading the new version software from loader tool, TZSC07036.
Memory data version D (IC9706 /TVRJ601) in the D board
VersionModelTypeDestination
3.**PW4UZConsumerUSA
4.**PWD4UYSystemUSA
5.**PW4BX,HZ,ConsumerU.K.H.K.,
6.**PWD4AY,BX, EX, HY, RYSystemU.K. / Euro / Australia
7.**PW4AZ, EX, RZConsumerEuro / Australia
Memory data version H (IC3699) in the H board
This version is difference depends on the H board type.
VersionType of H boradVersionType of H borad
1.**HY (BNC)3.**HD (DVI)
2.**HZ (RCA)4.**H (tuner)
Memory data change
To exit the CD mode, press the R button on the remote control.
13
Page 14
TH-42PW4 / TH-42PWD4
7.1.3. SD mode
Select the SD mode by Up/Down button on the remote control at the front page of CAT mode then press the Action button on the
remote control.
To exit the SD mode, press the R button on the remote control.
7.2. IIC mode structure (following items value is sample data.)
14
Page 15
8 Alignment
8.1. NTSC panel white balance
INPUTAlignment menuProcedureEquipmentSetting
1 NTSCColorPicture: 1) Find the nearest area to brightness of 10 cd/m2 as Low
Gray ScaleAnalyzerNormal Sub Adjust light by color sensor.
PatternWhite balance:Sub Bright 2) Adjust Sub bright to set Low light level to 10 cd/m
Cool
Aspect:PANEL W/B
16:9G cut off 3) Set G cut off to " 80 ".
PANEL W/B
B cut off 4) Adjust B and R cut off to set color temperature as
R cut off shown Fig.-01.
High light 75%Sub Adjust
Low light 15%Sub Bright 5) If Sub Bright is changed re-adjust it to set Low light
PANEL W/B
PANEL W/B
exactly.
2
to 10 cd/m
6)Find 75% of white area by color sensor.
G Drive 7) Set G Drive to " D8 ".
B Drive 8) Adjust B and R Drive to set color temperature
R Drive as shown Fig.-01.
.
TH-42PW4 / TH-42PWD4
2
9) Repeat item 4) to 7) to set both Low light and
high light.
PANEL W/B
R,G,B Drive 10) Increase same steps of R, G and B Drive to set
R,G,B Drive largest level of 3 color drive to "FC".
PANEL W/B
R,G,B cut off 11) Re-adjust Low light level again.
Color Temp.xy
Cool(Hi)0.2720.290
Normal(Mid)0.2880.296
Warm(Low)0.3130.329
Fig. -01
2Picture: 1) Change white balance to "Normal".
Normal PANEL W/B
White balance:R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.
Normal
PANEL W/B
Aspect:R,G,B Drive
16:9
3Picture: 1) Change white balance to "Warm".
Normal PANEL W/B
White balance:R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.
Warm
PANEL W/B
Aspect:R,G,B Drive
16:9
4Picture:Picture Menu 1) Change color templature to "Cool".
Normal Sub Adjust
White balance:Sub Bright 2)Re-set Sub bright to "30"
Cool
Aspect:
16:9
Note:
OSD is the difference between US model and Except US model.
Picture:Normal (Except US)/Standard (US model)
White balance (Except US)/Color Temp (US model)
15
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TH-42PW4 / TH-42PWD4
8.2. PAL/SECAM panel white balance
INPUTAlignment menuProcedureEquipmentSetting
1 PALColorPicture: 1) Find the nearest area to brightness of 10 cd/m2 as Low
Gray ScaleAnalyzerNormal Sub Adjust light by color sensor.
PatternWhite balance:Sub Bright 2) Adjust Sub bright to set Low light level to 10 cd/m
Cool exactly.
Aspect:PANEL W/B
16:9G cut off 3) Set G cut off to " 80 ".
PANEL W/B
High light 75%Sub Adjust
Low light 15%Sub Bright 5) If Sub Bright is changed re-adjust it to set Low light
PANEL W/B
PANEL W/B
PANEL W/B
PANEL W/B
B cut off 4) Adjust B and R cut off to set color temperature as
R cut off shown Fig.-02.
to 10 cd/m
2.
6)Find 75% of white area by color sensor.
G Drive 7) Set G Drive to " D8 ".
B Drive 8) Adjust B and R Drive to set color temperature
R Drive as shown Fig.-02.
9) Repeat procedure 4) to 7) to set both Low light and
high light.
R,G,B Drive 10) Increase same steps of R, G and B Drive to set
R,G,B Drive largest level of 3 color drive to "FC".
R,G,B cut off 11) Re-adjust Low light level again.
2
Color Temp.xy
Cool(Hi)0.2720.290
Normal(Mid)0.2880.296
Warm(Low)0.3130.329
Fig. -02
2Picture: 1) Change white balance to "Normal".
Normal PANEL W/B
White balance:R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.
Normal PANEL W/B
Aspect:R,G,B Drive
16:9
3Picture: 1) Change white balance to "Warm".
Normal PANEL W/B
White balance:R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.
Warm PANEL W/B
Aspect:R,G,B Drive
16:9
4Picture:Picture Menu 1) Change color templature to "Cool".
Normal Sub Adjust
White balance:Sub Bright 2)Re-set Sub bright to "30"
Cool
Aspect:
16:9
16
Page 17
TH-42PW4 / TH-42PWD4
Alignment menuProcedureEquipmentSetting
5Picture: 1) Write down each color temaparature of R,G,B drive and
Normal Cut off data as follows.
Aspect:
16:9
White
White balance:
Cool
Normal
Warm
BalanceCoolNormalWarm
R Drive
G Drive
B Drive
R Cut off
G Cut off
B Cut off
SECAM signal 2) Input SECAM signal.
3) Copy PAL R,G,B drive and cut off data of each white
balance mode to SECAM position.
17
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TH-42PW4 / TH-42PWD4
8.3. Pedestal setting
INPUTAlignment menuProcedureEquipmentSetting
1 ComponentPicture:PANEL W/B
(525i, 525p, 625i,NormalR cut off 1) Set R,G and B cut off to "
720i or 1080i)White balance:G cut off
Gray ScaleAspect:
Pattern16:9
Black 2 %
Black 0 % at black 2% area and no emission at black 0% area.
CoolB cut off
Chroma Control:
Gun off
RGB Sub Adjust:
G Sub Bright
Chroma Control:
Gun off
RGB Sub Adjust:
B Sub Bright
Chroma Control:
Gun off
RGB Sub Adjust:
R Sub Bright
** Adjust at the dark room.
80 ".
2) Set Gun off to "
3) Adjust G Sub bright to start some of green pixels emission
at black 2% area and no emission at black 0% area.
4) Set Gun off to "
5) Adjust B Sub bright to start some of blue pixels emission
6) Set Gun off to "
7) Adjust R Sub bright to start some of red pixels emission
at black 2% area and no emission at black 0% area.
5". (Only green pixels can emit.)
3". (Only blue pixels can emit.)
6". (Only red pixels can emit.)
2 RGB(PC)Picture: 1) Change input to RGB signal.
Gray ScaleNormal PANEL W/B
PatternWhite balance:R,G,B cut off 2) Repeat procedure 1) to 7) of Component input signal.
Cool PANEL W/B
Aspect:R,G,B Drive
16:9
Black 2 %
Black 0 %
18
Page 19
8.4. PC/RGB panel white balance
INPUTAlignment menuProcedureEquipmentSetting
1 PCColorPicture: 1) Find the nearest area to brightness of 10 cd/m2 as Low
Gray ScaleAnalyzerNormal Sub Adjust light by color sensor.
PatternWhite balance:Sub Bright 2) Adjust Sub bright to set Low light level to 10 cd/m
Cool exactly.
Aspect:PANEL W/B
16:9G cut off 3) Set G cut off to " 80 ".
PANEL W/B
B cut off 4) Adjust B and R cut off to set color temperature as
R cut off shown Fig.-03.
High light 75%Sub Adjust
Low light 15%Sub Bright 5) If Sub Bright is changed re-adjust it to set Low light
to 10 cd/m
6)Find 75% of white area by color sensor.
PANEL W/B
G Drive 7) Set G Drive to " D8 ".
PANEL W/B
B Drive 8) Adjust B and R Drive to set color temperature
R Drive as shown Fig.-03.
9) Repeat item 4) to 7) to set both Low light and
high light.
PANEL W/B
R,G,B Drive 10) Increase same steps of R, G and B Drive to set
R,G,B Drive largest level of 3 color drive to "FC".
PANEL W/B
R,G,B cut off 11) Re-adjust Low light level again.
2
.
TH-42PW4 / TH-42PWD4
2
Color Temp.xy
Cool(Hi)0.2720.290
Normal(Mid)0.2880.296
Warm(Low)0.3130.329
Fig. -03
2Picture: 1) Change white balance to "Normal".
Normal PANEL W/B
White balance:R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.
Normal PANEL W/B
Aspect:R,G,B Drive
16:9
3Picture: 1) Change white balance to "Warm".
Normal PANEL W/B
White balance:R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.
Warm PANEL W/B
Aspect:R,G,B Drive
16:9
4Picture:Picture Menu 1) Change color templature to "Cool".
Normal Sub Adjust
White balance:Sub Bright 2)Re-set Sub bright to "30"
Cool
Aspect:
16:9
19
Page 20
TH-42PW4 / TH-42PWD4
5Picture: 1) Write down each color temaparature of R,G,B drive and
RGB
Gray Scale
Pattern
High light 75%
Low light 15% 3) Copy PC R,G,B drive and cut off data of each white
6Picture: 1) Write down each color temaparature of R,G,B drive and
INPUTAlignment menuProcedureEquipmentSetting
Normal Cut off data as follows.
Aspect:
White balance:
NormalG Drive
Normal Cut off data as follows.
Aspect:
16:9
White
BalanceCoolNormalWarm
CoolR Drive
WarmB Drive
R Cut off
G Cut off
B Cut off
2) Input RGB signal.
balance mode to RGB position.
16:9
White
DVI
Gray Scale
Pattern
White balance:
CoolR Drive
NormalG Drive
WarmB Drive
BalanceCoolNormalWarm
R Cut off
G Cut off
B Cut off
2) Input DVI signal.
High light 75%
Low light 15% 3) Copy PC R,G,B drive and cut off data of each white
balance mode to DVI position.
20
Page 21
8.5. HD/ 525i /525p panel white balance
INPUTAlignment menuProcedureEquipmentSetting
1HD(720i or 1080i)ColorPicture: 1) Find the nearest area to brightness of 10 cd/m2 as Low
Gray ScaleAnalyzerNormal Sub Adjust light by color sensor.
PatternWhite balance:Sub Bright 2) Adjust Sub bright to set Low light level to 10 cd/m
Cool
exactly.
Aspect:PANEL W/B
16:9G cut off 3) Set G cut off to " 80 ".
PANEL W/B
B cut off 4) Adjust B and R cut off to set color temperature as
R cut off shown Fig.-04.
High light 75%Sub Adjust
Low light 15%Sub Bright 5) If Sub Bright is changed re-adjust it to set Low light
2
to 10 cd/m
.
6)Find 75% of white area by color sensor.
PANEL W/B
G Drive 7) Set G Drive to " D8 ".
PANEL W/B
B Drive 8) Adjust B and R Drive to set color temperature
R Drive as shown Fig.-04.
2
TH-42PW4 / TH-42PWD4
9) Repeat item 4) to 7) to set both Low light and
high light.
PANEL W/B
R,G,B Drive 10) Increase same steps of R, G and B Drive to set
R,G,B Drive largest level of 3 color drive to "FC".
PANEL W/B
R,G,B cut off 11) Re-adjust Low light level again.
Color Temp.xy
Cool(Hi)0.2720.290
Normal(Mid)0.2880.296
Warm(Low)0.3130.329
Fig. -04
2Picture: 1) Change white balance to "Normal".
Normal PANEL W/B
White balance:R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.
Normal
PANEL W/B
Aspect:R,G,B Drive
16:9
3Picture: 1) Change white balance to "Warm".
Normal PANEL W/B
White balance:R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.
Warm
PANEL W/B
Aspect:R,G,B Drive
16:9
4Picture:Picture Menu 1) Change color templature to "Cool".
Normal Sub Adjust
White balance:Sub Bright 2)Re-set Sub bright to "30"
Cool
Aspect:
16:9
21
Page 22
TH-42PW4 / TH-42PWD4
5Picture: 1) Write down each color temaparature of R,G,B drive and
RGB
Gray Scale
Pattern
High light 75%
Low light 15% 3) Copy HD drive and cut off data of each white
INPUTAlignment menuProcedureEquipmentSetting
Normal Cut off data as follows.
Aspect:
White balance:
Normal
16:9
Cool
Warm
White
BalanceCoolNormalWarm
R Drive
G Drive
B Drive
R Cut off
G Cut off
B Cut off
2)Change input signal to 525i and 525p.
balance mode to each signals position.
22
Page 23
8.6. 625i panel balance
INPUTAlignment menuProcedureEquipmentSetting
1 625iColorPicture: 1) Find the nearest area to brightness of 10 cd/m2 as Low
Gray ScaleAnalyzerNormal Sub Adjust light by color sensor.
PatternWhite balance:Sub Bright 2) Adjust Sub bright to set Low light level to 10 cd/m
Cool exactly.
Aspect:PANEL W/B
16:9G cut off 3) Set G cut off to " 80 ".
PANEL W/B
B cut off 4) Adjust B and R cut off to set color temperature as
R cut off shown Fig.-05.
High light 75%Sub Adjust
Low light 15%Sub Bright 5) If Sub Bright is changed re-adjust it to set Low light
to 10 cd/m
2
.
6)Find 75% of white area by color sensor.
PANEL W/B
G Drive 7) Set G Drive to " D8 ".
PANEL W/B
B Drive 8) Adjust B and R Drive to set color temperature
R Drive as shown Fig.-05.
9) Repeat item 4) to 7) to set both Low light and
high light.
PANEL W/B
R,G,B Drive 10) Increase same steps of R, G and B Drive to set
R,G,B Drive largest level of 3 color drive to "FC".
PANEL W/B
R,G,B cut off 11) Re-adjust Low light level again.
2
TH-42PW4 / TH-42PWD4
Color Temp.xy
Cool(Hi)0.2720.290
Normal(Mid)0.2880.296
Warm(Low)0.3130.329
Fig. -05
2Picture: 1) Change white balance to "Normal".
Normal PANEL W/B
White balance:R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.
Normal PANEL W/B
Aspect:R,G,B Drive
16:9
3Picture: 1) Change white balance to "Warm".
Normal PANEL W/B
White balance:R,G,B cut off 2) Repeat procedure 3) to 11) of Cool mode.
Warm PANEL W/B
Aspect:R,G,B Drive
16:9
4Picture:Picture Menu 1) Change color templature to "Cool".
Normal Sub Adjust
White balance:Sub Bright 2)Re-set Sub bright to "30"
Cool
Aspect:
16:9
23
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TH-42PW4 / TH-42PWD4
8.7. Sub brighness setting
INPUTAlignment menuProcedureEquipmentSetting
1 NTSCPicture:PANEL W/B
Gray ScaleNormalAll cut off 1) Set white balance to
PatternAspect:
** Adjust at the dark room.
Cool
.
16:9 2) Adjust All cut off to start some pixels emission
at black 2% area and no emission at black 0% area.
3) Write down all cut off data.
4) Set white balance to
Black 2 %
Black 0 % 5) Adjust All cut off to set same data of Cool mode.
6) Set white balance to
7) Adjust All cut off to set same data of Cool mode.
** Adjust at the dark room.
2 PALPicture:PANEL W/B
Gray ScaleNormalAll cut off 1) Set white balance to
PatternAspect:
16:9 2) Adjust All cut off to start some pixels emission
at black 2% area and no emission at black 0% area.
3) Write down all cut off data.
4) Set white balance to
Black 2 %
Black 0 % 5) Adjust All cut off to set same data of Cool mode.
6) Set white balance to
7) Adjust All cut off to set same data of Cool mode.
SECAM 8) Change to SECAM signal.
Gray Scale
Pattern 9) Copy PAL All cut off data to SECAM mode.
Nornal
warm
Cool
Nornal
warm
.
.
.
.
.
** Adjust at the dark room.
3 PCPicture:PANEL W/B
Gray ScaleNormalAll cut off 1) Set white balance to
PatternAspect:
16:9 2) Adjust All cut off to start some pixels emission
at black 2% area and no emission at black 0% area.
3) Write down all cut off data.
4) Set white balance to
Black 2 %
Black 0 % 5) Adjust All cut off to set same data of Cool mode.
6) Set white balance to
7) Adjust All cut off to set same data of Cool mode.
RGB
Gray Scale
Pattern
DVI
Gray Scale
Pattern
8) Change to RGB input signal.
9) Copy PC All cut off data to RGB mode.
10) Change to DVI input signal.
11) Copy PC All cut off data to DVI mode.
Cool
Nornal
warm
.
.
.
24
Page 25
Alignment menuProcedureINPUTEquipmentSetting
** Adjust at the dark room.
4 525iPicture:PANEL W/B
Gray ScaleNormalAll cut off 1) Set white balance to
PatternAspect:
16:9 2) Adjust All cut off to start some pixels emission
at black 2% area and no emission at black 0% area.
3) Write down all cut off data.
Cool
TH-42PW4 / TH-42PWD4
.
4) Set white balance to
Nornal
.
Black 2 %
Black 0 % 5) Adjust All cut off to set same data of Cool mode.
6) Set white balance to
warm
.
7) Adjust All cut off to set same data of Cool mode.
525p 8) Change to 525p signal.
Gray Scale
Pattern 9) Copy 525i All cut off data to 525p mode.
HD
(720i or 1080i) 8) Change to HD signal.
Gray Scale
Pattern 9) Copy 525i All cut off data to HD mode.
** Adjust at the dark room.
5 625iPicture:PANEL W/B
Cool
Gray ScaleNormalAll cut off 1) Set white balance to
.
PatternAspect:
16:9 2) Adjust All cut off to start some pixels emission
at black 2% area and no emission at black 0% area.
3) Write down all cut off data.
4) Set white balance to
Nornal
.
Black 2 %
Black 0 % 5) Adjust All cut off to set same data of Cool mode.
6) Set white balance to
warm
.
7) Adjust All cut off to set same data of Cool mode.
25
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TH-42PW4 / TH-42PWD4
9 Trouble shooting guide
9.1. Self Check
9.1.1. Display Indication
1. Self-check is used to automatically check the bus line
controlled circuit of the Plasma display.
2. To get into the Self-check mode press the volume down
button on the customer controls at the front of the set, at the
same time pressing the OFF-TIMER button on the remote
control, and the screen will show :-
If the CCU ports have been checked and found to be incorrect
Or not located then " - - " will appear in place of " OK "
Note:
In case of disconnected of H/HY/HZ “IC3699 - -” is
displayed.
9.1.2. Power LED Flashing timing chart
When an abnormality has occurred the unit, the protection circuit operates and cuts the power supply. At this time, the defective
part can be identified by the number of flashes of the Power LED at the front of the unit.
Above Fan function is operated during the fan is set.
26
Page 27
9.2. No Power (US model)
First check point
There are following 3 states of No Power indication by power LED.
1. No lit
2. Green is lit then turns red blinking a few seconds later.
3. Only red is lit.
1. No lit
2. Red LED Blinking
When one or some of supply voltages from power supply circuit are declined red LED will be blinking as power
TH-42PW4 / TH-42PWD4
27
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TH-42PW4 / TH-42PWD4
9.3. No Power (Except US)
First check point
There are following 3 states of No Power indication by power LED.
1. No lit
2. Green is lit then turns red blinking a few seconds later.
3. Only red is lit.
1. No lit
2. Red LED Blinking
When one or some of supply voltages from power supply circuit are declined red LED will be blinking as power
28
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9.4. No Picture
TH-42PW4 / TH-42PWD4
9.5. Local screen failure
Plasma display may have local area failure on the screen. Fig - 1 is the possible defect P.C.B. for each local area.
Fig - 1
29
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TH-42PW4 / TH-42PWD4
9.6. D-Board
9.6.1. OUTLINE
D board is consists of Analogue and Digital signal process, Discharge control and Micro control block.
D-board is operated by supply voltages of 3.3V, 5V, 13,5V and Standby 5V , RGB analogue (0.7Vp-p) and Sync. Signal.
D-board output parallel data video signal with control signal for the data driver circuit, Discharge control signal for Scan and Sustain
drive circuits and Micro control signals.
9.6.2. MAIN IC OPERATION
IC9007 ~ 9009 A/D Converter
RGB analogue signals are converted to 8 bits digital signal.
IC9204 FORMAT CONVERTER (LSI33)
Number of Horizontal line of input signals are converted to 480 lines.
This IC uses two clock lines, one is 15M 55MHz for input signal (ICK) and other one is 25M to 40MHz for out put signal. (OCK)
IC9400 PLASMA AI (LSI27)
At first input 8 bit signal data is memorized into two field memory (IC9402, IC9403), Plasma AI analyze APL level and
distribution of dark and bright components.
Plasma AI re-arrange 8 bit signal data to 12 bit signal data.
This IC also insert OSD (On-Screen Display signal) from Micro.
IC9501 SUB FIELD PROCESSOR
R,G and B 12 bit signal data is layout to fit with each electrodes of panel.
One field signal data is separated to upper 240 lines and lower 240 lines.
Both upper and lower signals are again separated odd and even number line and output.
9.6.3. DIAGNOSTIC
(1) General
Depend on the phenomenon possible defective section from Signal processing, Discharge control or Micro control section on
D-board can be diagnosed as follows.
1. Signal Processing section
a. No picture but panel has discharge.
b. Missing R, G or B signal
c. Dark Picture.
d. No OSD signal.
e. Vertical band noise appeared.
f. No picture or distortion on 1/4 area on the screen.
2. Micro control section
a. Does not turn on power.
b. No panel discharge.
3. Discharge control section
a. No discharge but Micro control is operated.
b. Dark picture
30
Page 31
(2) First Check Point
Confirm that follow signals are input to D board.
Power Supply
ConnectorPinFunctionConnectorPinFunction
D5
113.5 V DC
35.0 V DC23.3 V DC
--33.3 V DC
Input Signal
ConnectorFunctionPinFunction
D8-12Analogue Green signal
D8-13Analogue Blue signal29VD (Vertical Drive pulse)
D8-14Analogue Red signal34CLP (Clamp pulse)
(3) Trouble shooting
TH-42PW4 / TH-42PWD4
1STB 5 V DC
D6
37HD (Horizontal Drive pulse)
D9
31
Page 32
TH-42PW4 / TH-42PWD4
10 Option Setting
How to access the Option menu
32
Page 33
(Not available for TH-42PW4 series models)
System route models TH-42PWD4 series have special function and operation setting facility called
Option Menu. This Option Menu is useful for special function required customers. This should be set
at the installation stage. The end user could not set or change these because of hidden On screen menu.
Option menus
default
setting
Contents
WobblingOff
Screen image shift OFF.
Turns off the screen shift function that prevents after-images from
appearing on the screen.
Off-timer functionEnable
Off-timer operation invalidation.
The off-timer function is made invalid.
On Screen displayOn
On-screen display OFF.
Turns off the on-screen display that indicates power on, input modes
and when no signal is received.
Initial InputOff
Startup input setting.
Sets the input mode when the power is turned on (VIDEO,
COMPONENT, VIDEO/RGB, PC). Input mode switching is possible
after the power is turned on.
Initial VOL. levelOff
Startup volume setting.
Sets the volume level when the power is turned on. Volume can be
adjusted after the power is turned on.
Maximum VOL. LevelOff
Maximum volume setting Fix input mode.
Sets the maximum volume level. Volume cannot exceed this limit.
INPUT lockOff
Input mode cannot be switch.
Fixes the input mode to (VIDEO, COMPONENT, VIDEO/RGB, PC) and
input mode cannot be switched.
Button lockOff
Front operation button invalidation.
Front operation buttons are made invalid. Several combinations of
button invalidation are possible ; just the selection keys (VOL. keys, just
the INPUT key, or both VOL. keys and INPUT key.).
Studio W/BOff
Set the screen color temperature to 3,200 kelvin.
(use when the contents displayed on the screen needs to be firmed for
use in news programs or other purposes.) This is valid when the setting
is turned ON and the WHITE BALANCE in the PICTURE menu is set to
WARM.
Remocon User LevelOff
Remocon key invalidation.
Off : Valid key is all key of remocon.
User1 : Valid key are only Stand-by (ON/OFF), Input, Status, Surround,
Sound mute On/Off, and volume adjustment.
User2 : Valid key is only Stand-by (ON/OFF).
Note of Remocon User Level:
All key of remote control is valid in the service mode (CAT-mode) regardless of the setting of Remocon
User Level. To change the option setting when the Remocon User Level is set in the User1 or User2,
access the service mode (CAT-mode) first, then display the option menu the same method.
Components identified by mark have special characteristics important for safety.
When replacing any of these components, use only manufacture's specified parts.
Notes:
1. Resistor
All resistors are cabon 1/4W resistor, unless marked as follows:
Unit of resistance is OHM [W] (K=1,000, M=1,000,000).
: Nonflammable: Metal Oxide
: Solid: Metal Film
: Wire Wound: Fuse:
2. Capacitor
All capacitors are ceramic 50V capacitor, unless marked as follows:
Unit of capacitance is mF, unless otherwise noted.
: Temperature Compensation: Electrolytic
: Polyester: Bipolar
3. Coil
Unit of inductance is mF, unless otherwise noted.
4. Test Point
: Test Point position
5. Earth Symbol
: Chassis Earth (Cold): Line Earth (Hot)
6. Voltage Measurement
Voltage is measured by a DC voltmeter.
Conditions of the measurement are the following:
Power Source ................................................... AC 120V, 50/60Hz
Receiving Signal ............................................... Colour Bar signal (RF)
All customer's controls ...................................... Maximum positions
7. Number in red circle indicates waveform nember.
(See waveform pattern table.)
8. When arrow mark ( ) is found, connection is easily found from the direction of arrow
NP
+
-
Z
(US model)/AC220-240V,
50/60Hz (Except US)
TH-42PW4 / TH-42PWD4
Remarks:
1. The Power Circuit contains a circuit area which uses a separate power supply to isolate the
earth connection.
The circuit is defined by HOT and COLD indications in the schematic diagram. Take the
follwing precautions.
All circuits, except the Power Circuit, are cold.
Precautions
a. Do not touch the hot part or the hot and cold parts at the same time or you may
be shocked.
b. Do not short- circuit the hot and cold circuits or a fuse may blow and parts may
break.
c. Do not connect an instrument, such as an oscilloscope, to the hot and cold
circuits simultaneously or a fuse may blow.
Connect the earth of instruments to the earth connection of the circuit being
measured.
d. Make sure to disconnect the power plug before removing the chassis.
2. Following diodes are interchangeable.
MA150- MA162 (Replacement part)
9. Indicates the major signal flow.: VideoAudio
10. This schematic diagram is the latest at the time of printing and subject to change without
notice.
69
Page 70
TH-42PW4 / TH-42PWD4
13.2. Main Block (US model) Diagrams
OUT LINE
SU
SD
FF
64
FF
64
FF
64
FF
48
FF
64
FF
64
FF
64
FF
48
SC
SS.R.SS.R.SS.R.SS.R.SS.R.SS.R.
C2
C24
SUB-FIELD
SUB MPU
J3
H3
PC
C23
D23
D35
RS232C
HX
P
D5
D7
J13
J14
13.5V
P5
5V
SOS
STV 5V
P7
ON/OFF
+15V
-15V
P13
5V
13.5V
15V
P14
5V
STB7V
STB5V
REMOTE
RECEIVE
V
VSUS, Vbk
DRIVE
VOLTAGE
GENERATOR
ON/OFF
SWITCH CIRCUIT
POWER
LED
V34
C1
SC2
CONTROL
PULSE
SUSTAIN
PULSE
SCAN
PULSES
VOLTAGE
GENERATOR
FLOATINGGROUND
SC23
C14
C13
D13
D
SC21
D21
SC20
D20
J
J11
J10
HZ
/HY
DISCHARGE
CONTROL
MAIN MPU
D9
J9
AUDIO
AMP
AUDIO SW
BUFFER
AV RGB
AUDIO IN
I/P CONV.
RGB PROCESSOR
DVI
J2
H2
VIDEO/YUV
CONVERTE
BUFFER
V/Y
SW
AV /
S-VIDEO
PLASMAAI
D8
J8
YUV/RGB SW
BUFFER
RGB/
COMPONENT
FORMAT
CONV.
INFO.
ROM
HD/VD
Vda
PROCESSOR
D43
SYNC. SW
SYNC.
SEPARATOR
P23
15V
PROTECTOR
PRIMARY
P9
INPUT - +
SS.R.
P2
VSUS
Vbk
Vda, +15V, -15V
-15V, 13.5V, 5V
PROCESS
VOLTAGE
GENERATOR
STAND BY
STB7V
STB5V
VSUS
C22
Vda
SS33
SS2
SS48
ADDRESS
VOLTAGE
(VE)
SUSTAIN
PULSE
SS49
SS34
SS
P1
SS1
P12
SS12
S
S34
POWER
SWITCH
H3
+
R
-
SPEAKER
TERMINAL
C4
SS.R.
C43
SS.R.SS.R.SS.R.SS.R.SS.R.SS.R.
C49
C35
C48
C38
C41
C31
Vda
C39
C34
C3
70
F
AC120V
C33
F9
LINE
FILTER
F1
H3
from J10
+
L
-
SPEAKER
TERMINAL
Page 71
P7
P3
P5
P8
P6
FLOATINGGROUND
INPUT - +
SS.R.
C13
D13
SS.R.SS.R.SS.R.SS.R.SS.R.SS.R.
SC
SC2
PLASMAAI
MAIN MPU
I/P CONV.
RGB PROCESSOR
FORMAT
CONV.
D
D43
D35
FF
64
SU
FF
48
FF
64
FF
64
VIDEO/YUV
CONVERTE
DIGITAL
RGB
INTERFACE
SYNC. SW
J
V/Y
SW
AUDIO SW
HX
C23
P
SS.R.
V
S
POWER
SWITCH
PC
RGB/
COMPONENT
AV /
S-VIDEO
AV RGB
AUDIO IN
REMOTE
RECEIVE
POWER
LED
SS2
SS1
ADDRESS
VOLTAGE
(VE)
SUSTAIN
PULSE
ERASE
PULSE
SS48
SS49
SS33
C22
LINE
FILTER
F1
F9
F
SS
SS.R.SS.R.
SS.R.SS.R.SS.R.SS.R.
C49
C4
C3
C39
C34
C33
C41
V34
L
SPEAKER
TERMINAL
-
+
R
SPEAKER
TERMINAL
-
+
J10
J11
CONTROL
PULSE
SD
FF
48
FF
64
FF
64
FF
64
C1
C48
C38
C43
C31
C2
C14
C24
Vda
Vda
Vda
from J10
DISCHARGE
CONTROL
SC20
SC21
D21
D20
SUSTAIN
PULSE
SCAN
PULSES
C35
AC220 -
240V
H3H3
HZ
/HY
RS232C
BUFFER
BUFFER
BUFFER
INFO.
ROM
HD/VD
J2
H3
J3
H2
J8
AUDIO
AMP
D8
J9
D9
SUB MPU
SYNC.
SEPARATOR
YUV/RGB SW
VOLTAGE
GENERATOR
SUB-FIELD
PROCESSOR
STB7V
STB5V
SOS
STV 5V
ON/OFF
J13
+15V
-15V
5V
J14
13.5V
15V
5V
STB7V
STB5V
13.5V
5V
VSUS
VSUS
Vbk
SC23
15V
D5
D7
OUT LINE
D23
SUSTAIN
VOLTAGE
PROTECTOR
SUSTAIN
VOLTAGE
CONTROL
15V
Vda
PROCESS
VOLTAGE
PROTECTOR
POWER
FACTOR
CONTROL
STAND BY
P1
P5
P7
PROCESS
VOLTAGE
CONTROL
P22
PRIMARY
CIRCUIT
P19
P9
P18
P15P16
P21
PROCESS
VOLTAGE
RECTIFIER
P2
P23
P13
P14
SS12
SS34
S34
SUSTAIN
VOLTAGE
RECTIFIER
P12
TH-42PW4 / TH-42PWD4
13.3. Main (Except US) Block Diagram
71
Page 72
1
TH-42PW4 / TH-42PWD4
13.4. Power (US model) Block Diagram
AC IN
F115
F900
F901
LINE
FILTER
F9 51
P9 51
RL403
RL401
P
LINE
FILTER
LINE
FILTER
LINE
FILTER
D401
D426
D419
P1
T401
5
IC401
(DRIVE VOLTAGE OSCILLATOR)
4
DRV.REG
OSC
OSC
T403
5
7
3
1
8.3V
DRIVE
+
-
IC426
DRV.REG
8.3V
DRIVE
+
-
+
-
+
+
+
IC427
3
+
11
12
14
15
AVR
2
2
5
1
1
2
5
IC471
AVR
+
-
+
-
1
IC473
1
3
AVR
3
START
O.V.P
LATCH
18V
(PROCESS VOLTAGE OSCILLATOR)
O.V.P
LATCH
IC426
D435
3
OSC
2
REG
T.S.D
4
START
REG
T.S.D
15V
1
17V
+
-
R426
+
-
+
IC403
6
8
9
3
1
1
2
3
4
8
9
6
7
D434
STB5V
2
STB5V
2
4
Q515 Q516
K
A
D409
18
17
16
13
12
15
14
11
10
IC462
R
12
13
14
15
18
19
K
A
+
-
+
-
+
-
Q461
(70V)
+
R
+
-
+
-
+
Q463 Q467
Vda
+
-
VCC
for
IC474
IC472
-
+15V
-15V
IC468
1
IC470
1
-
VSUS
IC472
AVR
3
AVR
3
Q485
(190V)
Q462
Q465
IC464
K
A
vsus
7
+
+
1
2
POWER STOP SOS
5V
2
13.5V
2
IC465
K
A
R
Q469
15V
4
R
IC474
VSUS
9
+
14
OVP
(170V)
Vbk
Vda
34
+
2
+
-
Vbk
11
+
13
Q483
Q481
Q500
C460
TO SS1
2
3
VSUS
P2
TO SC2
1
VSUS
2
3
Vbk
P13
TO J13
1
+15V
3
-15V5V
6
P23
TO SC23
1
UN 15V
2
P10
TO FAN
1
UN 15V
3
FAN SOS
5
5V
P5
TO D5
3
5V
1
13.5V
P14
TO J14
13.5V
1
STB7V
3
4
5V
6
15V
8
9
P7
1
2
4
5
6
7
8
P12
1
2
4
5
for J
STB5V
MICRO ON/OFF
TO D
RUSH ON/OFF
TV ON/OFF
STB5V
KILL SOS
FAN SOS
PS SOS
ALL OFF
Vda
UN 15V
POWER SW
for D
72
Page 73
13.5. P-Board (US model) Schematic Diagrams
TH-42PW4 / TH-42PWD4
73
Page 74
DRIVE VOLTAGE PROTECTOR
TH-42PW4 / TH-42PWD4
13.6. Power (Except US) Block Diagram
PROCESS VOLTAGE PROTECTOR
P3
D604
Q601
P16SOS INVCC
1
IC603
VSUS15VVSUS5V
D606
Q600
8VDAVbkSOS15Vs
IC601 -15VsP2 To SC2
IC6003
AC IN
AC INLET11
5
2
OSC
4
OVP15V 111
7
TO FAN
F13
15
Q604
2
9
6
Q602
7
Q603
2
4
P15Vbk2
Q407
IC401
3
AVR
1
18V 12
61
Q405
Q406
Q408
IC6024
F901F90013
Q417
LINED446VDA
Q416
3
IC402
AVR
1
T401
FILTER
START +
STOP
FRL402D403 -
15 F9P9POWER FACTOR CONTROLTO SC23
3L401D412D44515V1
RL4013
1 -
FULL
WAVE
RECTIFIER
Q402
Q410
Q404
Q422/Q401
STOPSTOP
118
IC735 IC650D443 -
6
10
IC737
IC736
Q730
5
8
9
Q650
Q651
STOP
Q412
Q414
Q415
T4025V
IC403
3
2
P19411 951 P18
1
D419
D440D439D434OSC.
7
PFC
+ +
3
- 110VPROTECTION
1
IC407
AVR
5
230VP6
PFC : Power Factor Control
STB 7V
STB 5V
MAIN POWER SWITCH ON/OFF -
Q750
IC750
COMPARATOR
D751
Q775
Q776
IC775
COMPARATOR
P7P8
854321743216
P21
P22
13.5V
Vbk
Q465
VSUS
Q464
T400P1 To SS1
+
IC464
2
VSUS
P10
UN 15V
FAN SOS
5V
P5
TO D5
3
Q419
1
5V
13.5V
Q420
IC412
P23
IC409
12
+
AVR
D441 +15VTo J13
+
+
For AUDIO6
P13
1
3
15V
+15V
-15V5V
-15V
P14
P5
D435
D436
D442
K
A
IC411
12
+
AVR
13.5V
Q421
R
Q423
4
IC410
1
AVR
Q413
SOS
Q413
2
TO J14
4
5V
3
STB7V
1
13.5V
6
8
STB5V
9
S.MPU
P7
ON/OF
TO D7
2
TV ON/OFF
STB5V
5
KILL SOS
6
FAN SOS
7
PS SOS
8
ALL OFF
P12
TO SS12
1
+
Vda
2
15V
4
5
POWER SW
74
Page 75
13.7. P1-Board (Except US) Schematic Diagrams
TH-42PW4 / TH-42PWD4
75
Page 76
TH-42PW4 / TH-42PWD4
13.8. F and P3-Board (Except US) Schematic Diagram
76
Page 77
13.9. P5, P6, P7 and P8-Board (Except US) Schematic diagram