61
ELECTRICAL ADJUSTMENTS (2HEAD & 4HEAD MODEL)
PG (Pulse Generator) Shifter Adjustment (Fig. 3)
Test Points:
PT01 PIN
#
Main
Video Out Jack
Rear Panel
Adjust:
R595 (PG Shifter)
Main
The Pulse Generator (PG) Shifter determines the video head
switching point during playback. Misadjustment of the PG
Shifter may cause head switching noise in the picture and/or ver-
tical jitter.
1. Load the instrument with an alignment tape and play back the
color bar signal or monoscope signal.
2. Connect channel-1 scope probe (1V/div.: 50µsec/div.) to
PT01 PIN
#
. Trigger the scope on channel-1.
3. Connect channel-2 scope probe (1V/div.) to the Video Out
Jack.
4. Set the scope to (-) slope and adjust the PG Shifter control
VR595 so that the trailing edge of the SW 30Hz pulse is
placed 6.5H±0.5H (horizontal) lines before the start of verti-
cal sync pulse.
SWITCHING
SW30Hz
PULSE
VIDEO
OUTPUT
V. SYNC
6.5H±0.5
Fig. 3 - PG Shifter Adjustment
Содержание DV- K584N-SJ
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Страница 95: ...94 2HD HEAD AMP SCHEMATIC DIAGRAM K384N K284N K304N...
Страница 96: ...95 4HD HEAD AMP SCHEMATIC DIAGRAM K584N K484N K504N...
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Страница 100: ...99 TIMER SYSCON SCHEMATIC DIAGRAM K584N K484N K384N K284N K504N K304N...
Страница 101: ...100 POWER SUPPLY BLOCK DIAGRAM FREE VOLTAGE K584NY SJ M K584NZ SJ M K584NZ SG M...
Страница 103: ...102 2HD HEAD AMP BLOCK DIAGRAM K384N K284N K304N...
Страница 104: ...103 4HD HEAD AMP BLOCK DIAGRAM K584N K484N K504N...
Страница 105: ...104 VIDEO AUDIO BLOCK DIAGRAM K584N K484N K384N K284N K504N K304N...
Страница 106: ...105 PIF INPUT SELECTOR BLOCK DIAGRAM K584N K484N K384N K284N K504N K304N...
Страница 107: ...106 SYSCON SERVO BLOCK DIAGRAM K584N K484N K384N K284N K504N K304N SEG A SEG L SEG A SEG L SEG C SEG F G1 G8 G1 G8...
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