Zenith P42W22B Service Manual
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1. Application Object
These instructions are applied to all of the PDP monitor, NF01DC.
2. Notes
(1) Because this is not a hot chassis, it is not necessary to use
an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25±5¡C of temperature and 65±10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver must keep 110~240V,
50/60Hz in adjusting.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
¤ After receiving 100% white pattern, the receiver must be
operate prior to adjustment.(Or white condition in HEATRUN mode)
¤ŁEnter into HEAT-RUN mode
- Select the HEAT-RUN OFF by pressing ADJ button on
Remote Control for adjustment.
- Press the VOL + button in HEAT-RUN OFF.
(OSD display HEAT-RUN WHITE and screen display
100% full WHITE PATTERN)
¤ØSet is activated HEAT-RUN without signal generator in
this mode.
[ Single color pattern of HEAT-RUN mode uses to check
PANEL.(RED/BLUE/GREEN)
[Caution] If you turn on a still screen more than 20 minutes, a
afterimage may be occur in the black level part of the
screen.
3. POWER PCB Assy Voltage Adjustment
[ Replace PDP Module or Power Board, adjust certainly Power
PCB Assy Voltage.
3-1. Test Equipment
D.M.M 1EA
3-2. Connection Diagram for Measuring
Refer to Fig 1.
3-3. Adjustment Method
(1) Va Adjusment
¤ Connect pin 1 of CN806 or CN811 to (+) jack of D.M.M.
¤ŁAfter turning the VR351(Va CTL), voltage of D.M.M
adjustment as same as Va voltage which on label of
panel right/top.(Deviation : ±0.5V)
(2) Vs Adjustment
¤ Connect pin 1 of CN803 to (+) jack of D.M.M.
¤ŁAfter turning the VR551(Vs CTL), voltage of D.M.M
adjust as same as Vs voltage which indicated on label
of panel right/top.(Deviation : ±0.5V)
(3) V-y Adjustment
¤ Connect pin 1 of CN802 to (+) jack of D.M.M.
¤ŁAfter turning the VR751(V-y CTL), voltage of D.M.M
adjust as same as V-y voltage which indicated on label
of panel right/top.(Deviation : ±0.5V)
(4) Vsetup Adjustment
¤ Connect pin 5 of CN802 to (+) jack of D.M.M.
¤ŁAfter turning the VR651(V
SETUP CTL), voltage of D.M.M
adjust as same as Vs voltage which indicated on label
of panel right/top.(Deviation : ±0.5V)
(5) 5V Adjustment
¤ Connect pin 3 of CN809 to (+) jack of D.M.M.
¤ŁAfter turning the VR253(5V CTL), adjust the voltage of
D.M.M to 5.1V.(Deviation : ±0.05V)
(6) STBY 5V Adjustment
¤ Connect pin 3 of CN808 to (+) jack of D.M.M.
¤ŁCheck the voltage(5V) of D.M.M.
¤ØAdjust the voltage of D.M.M so that voltage of D.M.M is
5V. (Deviation : ±0.05V)
[ Refer to Typical Voltage
1. Va : 60 ~ 75V
2. Vs : 170 ~ 185V
3. -Vy : -60 ~ -90V
4. Vsetup : 210 ~ 240V
4. Adjustment of White Balance
4-1. Required Equipment
Color analyzer(CA-100 or same production)
4-2. Connection Diagram of Equipment for
Measuring
[ After stop the Micom by pressing IN-START Key on Remote
Control, insert the P1002 with automatic adjustment of
connector.
After remove connector, move the Micom by pressing ENTER
Key.
ADJUSTMENT INSTRUCTIONS
COLOR
ANALYZER
TYPE; CA-100
Window
CVBS Signal Input
High Light
85±5cd/m2
Low Light
8±3cd/m2
PDP MONITOR
MSPG-2100 or
MSTG-5200
<Fig 2> Connection Diagram of Automatic Adjustment
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4-3. Adjustment of White Balance
¥ Operate the Zero-calibration of the CAÑ100, then stick
sensor to PDP module surface when you adjust.
¥ For manual adjustment, it is also possible by the following
sequence.
(1) Select WHITE PATTERN of HEAT RUN mode by pressing
ADJ button on Remote Control for adjustment then operate
HEAT RUN more than 15 minute.
(2) Supply 10 step gray scale bar signal in pattern generater.
(A/V Input)
(3) To adjust Low Light, stick sensor to 9th pattern(Dark),
select the W/B by pressing ADJ button on Remote Control
for adjustment and press the VOL + button enter
Adjustment Mode.
After select the G cut and B cut, press the VOL +/- Key
and adjust it until color coordination becomes (R cut
fixation)
color coordination : X=0.270±0.003, Y=0.280±0.003
color temperature : 10,000
cK ± 500cK
(4) To adjust High Light, stick sensor to 2th pattern(White),
select the W/B by pressing ADJ button on Remote Control
for adjustment and press the VOL + button enter
Adjustment Mode.
After select the R GAIN and G GAIN, press the VOL +/Key and adjust it until color coordination becomes (B GAIN
fixation)
color coordination : X=0.270±0.003, Y=0.280±0.003
color temperature : 10,000cK ± 500cK
(5) Confirm the result of the High Light adjustment.
If the deviation of High Light occur, operate the adjustment
of Low Light and High Light again.
(6) Exit adjustment mode using Enter button.
Vs
Va CTL
- Vy CTL
VR751
Vsetup CTL
VR651
- Vy
Vsetup
Vs
- Vy CTL
VR751
Vsetup CTL
VR651
- Vy
Vsetup
Va
CN811
CN809
CN808
5V
CN806
CN802
CN803
STBY 5V
VR 351
Va CTL
VR 253
5V
VR 151
STBY 5V
Va CTL
VR 551
Vs CTL
<Fig 1>
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- Vy
Vsetup
Vs
Va
Vsetup ADJ
VR8104
Va ADJ
VR8105
Vs ADJ
VR8102
- Vy ADJ
VR8103
<Fig 2> Connection Diagram of POWERWEL Power Adj. for Measuring
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TROUBLESHOOTING
1. No Video
2. No Sound
Abnormal Picture
Input PC signal.
Normal
Abnormal
Check CXA2101
IC203
Normal
Check ADV7123
IC406
Check JAGASM
IC501
Check 74F541D
IC902~IC905
Check cable of pin 41
P902
Normal
Check FLI2220
IC404
Normal
Check FLI2200
IC403
Normal
Check VPC3230
IC201
Normal
Check Input jack & Connector.
Check connector
speaker to set.
Check MSP3401
IC601
Check LA4282
IC603
Check Input
Jack.
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3. No Video
4. No Sound
Nothing output of image.
Check Input of AC.
(90~225V)
Normal
Abnormal
Abnormal
Abnormal
Check ST-BY LED ON
Main S/W ON.
Normal
Check LED YELLOW
Sub S/W ON.
Connect plug with the set.
Check AC Line Fuse.
Check voltage of Vs after open
with CN802, CN803, CN804.
Check short of Q603, Q703.
Abnormal
Replace Q603, Q703.
Normal
Check a connective condition
and various connector.
Check a connective
condition of sound power
cable.
Check voltage of sound
terminal.
Check Open with F8811
Fuse.
Check connection
line of speaker.
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BLOCK DIAGRAM
1. VSC
MICOM
EEPROM
X2416P
AUDIO
L
R
AUDIO AMP
LA4282
(L & R)
5
RGBHV
COLOR DECODER
(VPC3230D)
DEINTERLACE
(FLI2200)
MEMORY
(4M-BYTE)
ENHANCER
(FLI2220)
COLOR CONTROL
&
VIDEO SWITCH
(CXA2101Q)
3Y,Pb,Pr(MNT)
SCALER
(JAGASM)
MEMORY
(8M-BYTE)
EPLD
(GEN. CLAMP)
Buffer
(74F574 x 4)
H
V
Clamp
2H/V
H
5H/V/CLK/
HBLK/VBLK
4
H/V/DE/CLK
5
RGBHV
3RGB
AUDIO
SWITCH
(LA7222)
2
H/V
PORT EXP
(M62320X4)
ROM
(AT29C010)
(74HCT373)
YCbCr/
YPbPr
CVBS
Y/C
41P
4
4
H/V/
FIELD/
LLC1
2H/V
DAC
(ADV7123)
5
RGBHV
16
YUV
30
RGB
RGB
30
YUV
16
24
RGB
2
Rx,Tx
Digital Line
Analog Line
H/V/DE/CLK
24
RGB
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