Sony XTL-750W, Service Manual

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white blue
SYNC
TP111
1 2 4 3
white blue
SYNC
TP111
1 2 4 3
RGB Decoder FO Adjustment
Procedure:
Hong Kong model:
1. Without INPUT1, INPUT2 inputs (no signal input mode), short
the jumper wire between TP100 and GND.
2. Connect a frequency counter to TP61.
3. Adjust VR6 so that reading on frequency counter is
4.433619 MHz
±
10 Hz.
4. Short the jumper wire between TP106 and GND.
5. Connect a frequency counter to TP61.
6. Confirm that reading on frequency counter is 3.579545 MHz
±
100 Hz.
7. After this adjustment, remove the jumper wires.
US model:
1. Without INPUT1, INPUT2 inputs (no signal input mode), short
the jumper wire between TP100 and GND.
2. Connect a frequency counter to TP61.
3. Adjust VR6 so that reading on frequency counter is
3.579545 MHz
±
100 Hz.
4. After this adjustment, remove the jumper wires.
RGB Decoder Input Level Adjustment
Procedure:
1. Input signal : PAL EBU color bar (INPUT 1 VIDEO)
2. Adjust VR4 so that the white peak
1
(100% white) of
TP111 (B OUT) is at 1.0 Vp-p.
DL AMP & DAT Adjustment (Hong Kong model)
Procedure:
1. Adjust DAT so as to minimize the variation between the level
2
and the level
3
of TP111.
2. Adjust VR5 so that the blue level
4
is at 1.0 Vp-p.
3. Set the input to NTSC, and confirm that the blue level
4
is at
1.0
±
0.1 Vp-p.