Samsung VP-D55 Service Manual page 18

Alignment and Adjustment
3. How to adjust Head Switching (HDSWP)
1) Connect No. 2 pin of WAFER CN603 (HEAD-SW signal) for adjustment to CH1 of oscilloscope.
2) Connect No. 3 pin of WAFER CN603 (ENVE-OUT signal) for adjustment to CH2 of oscilloscope.
3) Play standard color bar tape.
4) Select HDSW of the video adjustment mode.
5) Adjust so that the time between HEAD-SW START and G1 START OF ENVE-OUT is 141µs (±10µs).
H'D-SW
ENVE-
OUT
4. Center Value Adjustment of Zoom Switch
1) Select ZOOMVR in the video adjustment mode.
2) Adjust ZOOM SW so that the switch is put in the middle of T and W.
3) Adjust ZOOMVR so that the current value of ZOOM SW is equal to the adjusted ZOOMVR value.
3-4
G1
141uS
SP
27MIN
ADJ ->
FF 01 80
PLAY
0: 27:00: 00
V-REF : 6BH
S64 L00
(Current value of the Zoom SW)
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