Panasonic Omnivision PV-DF2002, Руководство по обслуживанию

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7.3.8 PG SHIFTER ADJUSTMENT
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Purpose:
Determine the Video Head Switching Point during Playback.
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Symptom of Misadjustment:
May cause Head Switching Noise and/or Vertical Jitter.
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Test Point :
TP3001 (Main C.B.A.),
TP6205 (Main C.B.A.)
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Adjustment :
PG SHIFTER (EVR)
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Specification :
6 H±1 H (0.38 ms±0.06 ms)
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INPUT :
----------
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Mode :
SP Playback
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Equipment :
Oscilloscope,
VHS Alignment Tape (VFMS0003H6)
1. Insert the VHS Alignment Tape and playback in SP mode.
2. Connect the channel-1 scope probe to TP3001 and the channel-2 scope probe to TP6205. Used
TP6205 as a trigger.
3. Select PG SHIFTER in EVR adjustment mode and 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.
Fig. E7
9. 9. 2004 file://C:\Documents%20and%20Settings\Admin\Plocha\SCHÉMATA\VIDEA\PANAS...