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7.3.4.4.1. How to release from Service Mode:
Press DISPLAY key again on the remote control.
7.3.5. PG SHIFTER ADJUSTMENT
Purpose:
Determine the Video Head Switching Point during Playback.
Symptom of Misadjustment:
May cause Head Switching Noise and/or Vertical Jitter.
Test Point:
TP3001 (TV/VCR Main C.B.A.),
TP6205 (TV/VCR Main C.B.A.)
Adjustment:
PG SHIFTER (EVR)
Specification:
T = 6 H±1 H (0.38 ms±0.06 ms)
Input:
----------
Mode:
SP Playback
Equipment:
Oscilloscope, VHS Alignment Tape (VFMS0003H6)
1. Enter EVR PG Shifter Adjustment mode, refer to
SHIFTER ADJUSTMENT
2. Connect the channel-1 scope probe to TP3001 and the channel-2 scope probe to
TP6205. Use TP6205 as a trigger.
3. Adjust value so that the trailing edge of the head switching pulse is placed 6 H±1 H
(0.38 ms±0.06 ms) before the start of the vertical sync pulse.
4. Release EVR PG Shifter Adjustment Mode.
The adjusted value will be written to Memory IC (IC6004).
MODE."
99
"HOW TO ENTER EVR PG
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