Sony PVM-20M2U Service Manual page 36

10-13. PAL PHASE (ACC OFF)
Note : 10-13. is not applicable to the group of models 3.
l) Conduct ACC OFF via MENU.
2) Adjust
IPHASEPALACCOFFI
in the same way as 10-12-4).
10-14. PAL B-Y PHASE
Note : Be sure to set ACC in the ON position before this adjust-
ment.
l) Input a PAL SP color bar.
2) Connect the probe of an oscilloscope to TP305.
3) Set the unit in the service mode.
4) Adjust
IB-YPHASEPALI
so that the waveform of the R-Y anti-
PAL signal will be "0." (Fig.S-26)
Anti-PAL signal
B-Y (90" /90" )
t
t
-o-
*The signal waveform differs slightly every hour.
Adjust it to "0."
Fig. 5·26 B· Y OUT
10-15. PAL CHROMA (NORMAL)
l) Input a PAL color bar.
2) Connect the probe of an oscilloscope to IC404 ®PIN or TP402.
3) Set the unit in the service mode.
4) Adjust
!CHROMA PAL NOR.!
so that the peaks of waveforms will be
flush with each other. (Fig.S-27)
10-16. PAL CHROMA (ACC OFF)
Note : 10-16. is not applicable to the group of model 3.
l) ConductACC OFF via MENU.
2) Adjust
ICHROMAPALACCOFFI
in the same way asl0-15-4).(Fig.5-
27)
Make B and D flush with each other.
A
i
40mVmax.
Flg.S-27
10-17. PAL R-Y LEVEL
Note : Be sure to set ACC in the ON position before this adjust-
ment.
1) Input a PAL color bar.
2) Connect the probe of an oscilloscope to IC404 @>PIN or TP401.
3) Set the unit in the service mode.
4) Adjust
IR.-YLEVELPALI
so that the peaks of waveforms will be
flush with each other
as
shown on the right (Fig.S-28)
Make adjustment so that B=D.
IC404@PIN
60mVmax.
+
B
D
20mVmax.
Fig. 5-28
11. SECAM adjustment
Note : Make adjustment after deflection adjustment.
Note : Subject to H-FREQ, H-BLK, VIDEO-PHASE, ANGLE,
BOW, H-DELAY, etc.
Note: 11. SEC AM adjustment is not applicable to the group of
models 3.
11-1. HPWIDTH (NORMAL) adjustment
1) Input a SEC AM color bar.
Note : The board is roughly adjusted in 11-1., and IC317 @ PIN
pulse width may be used for control.
2) Set the unit in the UNDER SCAN mode.
3) Set the unit in the service mode.
4) Adjust
IHP WID1H NOR. I
so that the color section at the left edge of
the upper portion of the screen is about to disappear.
(Fig.5-2~)
BEZEL
Make adjustment so that colors are
about
to disappear.
Fig. 5-29
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