Panasonic TX-PR42G10, Service Manual

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8.1.2. Initialization Pulse Adjust
1. Input the W hite signal to plasma video input.
2. Set the picture controls as follows.
Picture menu : Dynamic
PNR : Min
A spect : 16:9
3. Connect Oscilloscope to TPSC1 (SC).
Check the voltage (T2) at 100|is period on the down slop.
Test point Volume Level
T2 TPSC1 (SC) VR16601 (SC) 250 V ± 10 V
TPSC1
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Sa p p e d TJ________ ______________ 500MS/S 20HS/dui
1
U ------I-----
100 Ц s
—
1
CHI 1 0 0 :1
5 0 .0 U/diM
DC
F u l l
'
\ Г
l
"
b10V
Edge CHI
Au to
4 0 0 .0 U
i
i
1'2 = 250V d
i
!
1
>
X I 20.000U S Y1 343.880U
X2 120.000US Y2 93.65Z3U
dX 100.O00US dY -250.ZZB U
1/dX 1 0 .00000kHZ
8.1.3. P.C.B. (Printed Circuit Board) exchange
8.1.3.1. Caution
1. To remove PC.B., w ait 1 minute after power was off for discharge from electrolysis capacitors.
8.1.3.2. 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) - 195V ± 2V VR16600 (SC)
SC Board Vscn TPVSCN (SC) Vad_base : 148V ± 1V
GND_base : - 47V ± 3V
VR16841 (SC)
A Board W hite 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 PC.B.
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