Initialization Pulse Adjust; Printed Circuit Board) Exchange - Panasonic TH-50PZ750U Service Manual

11.2. Initialization Pulse Adjust

1. Input the White signal to plasma video input.
2. Set the picture controls as follows.
Picture menu : Vivid
Normal : Set
Aspect : Full
3. Connect Oscilloscope to TPSC1 (SC).
Check that the flat section(T1) is less than 40µs.
Check and adjust that the stand down pulse(T2) period are each within specification.
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.
P Board Vsus
SC Board Vad
SS Board Ve
D, DG Board White balance and Sub brightness for NTSC, PAL, HD, PC and 625i signals
*See the Panel label.
Caution:
Absolutely do not reduce Vsus below Ve not to damage the P.C.B.
Test point
T2 TPSC1 (SC) VR6602 (SC)
Name Test Point
TPVSUS (SS)
TPVAD (SC)
TPVE (SS)
Volume Level
160 ± 10µ Sec
Voltage Volume
Vsus ± 2V VR251 (P)
-90V ± 1V VR6600 (SC)
Ve ± 1V VR6000 (SS)
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TH-50PZ750U
Remarks
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