Panasonic TH-42PZ70B / TH-42PZ70E / TH-42PY70F / TH-42PY70P Service Manual ▷ View online
11.2. Initialization Pulse Adjust
1. Input the White signal to plasma video input.
2. Set the picture controls as follows.
2. Set the picture controls as follows.
Picture menu : Dynamic
PNR : OFF
Aspect : 16:9
PNR : OFF
Aspect : 16:9
3. Connect Oscilloscope to TPSC1 (SC).
Check and adjust that the stand down pulse(T2) period are each within specification.
Test point
Volume
Level
T2
TPSC1 (SC)
VR6602 (SC)
250 ± 10µ Sec
11.3. P.C.B. (Printed Circuit Board) exchange
11.3.1. Caution
1. To remove P.C.B. , wait 1 minute after power was off for discharge from electrolysis capacitors.
11.3.2. Quick adjustment after P.C.B. exchange
Adjust the following voltages with the multimeter.
P.C.B.
Name
Test Point
Voltage
Volume
Remarks
P Board
Vsus
TPVSUS (SS)
Vsus ± 2V
VR251 (P)
*
SC Board
Vad
TPVAD (SC)
-140V ± 1V
VR6600 (SC)
Vscn
TPVSCN (SC)
Vad + 148V ± 1V
VR6841 (SC)
SS Board
Ve
TPVE (SS)
Ve ± 1V
VR6000 (SS)
*
D, DG Board
White balance and Sub brightness for NTSC, PAL, HD, PC and 625i signals
*See the Panel label.
Caution:
Caution:
Absolutely do not reduce Vsus below Ve not to damage the P.C.B.
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TH-42PZ70B / TH-42PZ70E / TH-42PY70F / TH-42PY70P
11.4. Adjustment Volume Location
11.5. Test Point Location
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TH-42PZ70B / TH-42PZ70E / TH-42PY70F / TH-42PY70P
12 Adjustment
12.1. Sub-Contrast adjustment
Name of measuring instrument
Connection
Remarks
RF generator
Base Band generator
Base Band generator
Preparation (AV)
Remarks
1.
Receive AV1 (PAL 100% Full White or Split Colour bar shown as below) .
2.
Goes into service mode.
3.
Push “1” or “2” key, and goes into service mode for “Sub-Contrast”.
Adjustment of AV system
Remarks
1.
The colour key yellow button of remote control is pushed.
2.
The OSD character of sub-contrast becomes red.
(Inside under automatic adjustment)
3.
The OSD character of sub-contrast returns to black.
4.
End.
Preparation (RF)
Remarks
1.
Receive RF (PAL 100% Full White or Split Colour bar shown as below.)
2.
Goes into service mode.
3.
Push “1” or “2” key, and goes into service mode for “Sub-Contrast”.
Adjustment of RF system
Remarks
1.
The colour key yellow button of remote control is pushed.
2.
The OSD character of sub-contrast becomes red.
(Inside under automatic adjustment)
3.
The OSD character of sub-contrast returns to black.
4.
End.
Preparation (HD)
Remarks
1.
Receive Component
(1080i/ 60Hz or 1080i/ 50Hz, 100% Full White or Split colour bar as shown below.)
2.
Goes into service mode.
3.
Push “1” or “2” key, and goes into service mode for “Sub-Contrast”.
Adjustment of HD system
Remarks
1.
The colour key yellow button of remote control is pushed.
2.
The OSD character of sub-contrast becomes red.
(Inside under automatic adjustment)
3.
The OSD character of sub-contrast returns to black.
4.
End.
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TH-42PZ70B / TH-42PZ70E / TH-42PY70F / TH-42PY70P
12.2. PAL panel white balance adjustment
Instrument Name
Connection
Remarks
·
·
·
· W/B pattern
·
·
·
· Color analyzer (Minolta CA-100 or equivalent)
RF input
Panel surface
Panel surface
User setting: Normal
Procedure
Remarks
·
·
·
· Asing time is longer than 15min.
·
·
·
· Make sure the front panel to be used on the final set is fitted.
·
·
·
· Make sure a color signal is not being shown before adjustment.
·
·
·
· Put the color analyzer where there is little colour variation.
Complete the adjustment within 10 minutes after the turn on electricity.
Turn on the power supply again when it is not possible to complete it by aging etc.
1.
Display the white balance pattern.
2.
Enter the Service mode.
3.
A number key “1” and “2” are operated and “WB-ADJ” is displayed.
Check that the color balance is “HIGH”.
4.
Select “G-CUTOFF” item, using the number-key “3” or “4”, and set to “80”, using the volume-
key “+” or “-”.
key “+” or “-”.
Also, “B-CUTOFF” and “R-CUTOFF” set to “80”.
5.
Set “G-DRIVE” at “E0”.
6.
Touch the signal receiver of color analyzer to the highlight window’s center, and adjust B
drive and R drive so x, y become the “COLOR TEMP HIGH” in the below table.
drive and R drive so x, y become the “COLOR TEMP HIGH” in the below table.
7.
All RGB drive increase so that the maximum drive value of RGB may become “FC”.
(“ALL-DRIVE” set to “FC”.)
8.
Set color balance to NORMAL using “7” key.
9.
Fix G cutoff , B cutoff and R cutoff at “80”.
10. Fix G drive at “E0”.
11. Adjust B drive and R drive so the highlight window’s x, y become the “COLOR TEMP
NORMAL” in the below table.
12. All RGB drive increase so that the maximum drive value of RGB may become “FC”.
(“ALL-DRIVE” set to “FC”.)
13. Set color balance to “LOW” using “7” key.
14. Fix G cutoff, B cutoff and R cutoff to “80”.
15. Fix G drive to “E0”.
16. Adjust B drive and R drive so the highlight window’s x, y become the “COLOR TEMP LOW”
shown in the below table.
17. All RGB drive increase so that the maximum drive value of RGB may become “FC”.
(“ALL-DRIVE” set to “FC”.)
Picture menu : Dynamic
ASPECT : 16:9
ASPECT : 16:9
·
·
·
· Highlight section
Signal amplitude 75%
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TH-42PZ70B / TH-42PZ70E / TH-42PY70F / TH-42PY70P
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