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| VM-R200PSN
SERVICE ADJUSTMENTS
TOOLS AND FIXTURES FOR ADJUSTMENT
e@DC VOLTMETER
@ OSCILLOSCOPE
@PATTERN GENERATOR (PAL,SECAM)
1.CHANGE OF ADJUSTMENTS
Measurin
g
Test point
Adjustment part
Description
instrument
Pattern
TP-48
C340
.
Connect between the pin @ and @(+12V
generator
TP-49
(PAL COLOUR
line) of [C203 with 10kQ resistor.
PAL CIRCUIT
Adjustment
(PAL,SECAM) | PIN©OQOO@®
ee
2.
Short both the pin Mand © (GND) of 1C203.
Oscilloscope
| of IC203
(LISSAyOUS)
3.
Input a PAL colour bar signal.
[DECODER
C294
4.
Adjust the C340 (PAL COLOUR SYNC) so
BOARD]
(LISSAYOUS)
that the screen (colour bar) is colour
R307
synchronized.
i iBEeODER
5.
Connect the oscilloscope with TP-48 and TP-
BOARD]
49. And set in X - Y mode.
;
6.
Adjust the signal (A) to be (B) ,to be (C) using
R307 (DL AMP PAL) and C293
(LISSAJOUS).
7.
If adjustment is inadequate, also adjust with
C294 (LISSAJOUS).
8.
Input a PAL split colour bar signal.
9.
Adjust the signal (D) to be (E) using C340
(PAL COLOUR SYNC).
(No.50058B) 5
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