Daewoo DV-K11WZ-PB/A, Service Manual

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SERVO CIRCUIT ADJUSTMENT METHOD
VIDEO HEAD SWITCHING POSITION
!
Connection Method
@
Adjustment Procedure
1. Play back the test tape.(STAIR STEP DP-2)
2. Set the oscilloscope in the chop mode. Connect CH1 to the SW pulse(PT01 PIN
#
), and CH2 to the VIDEO
OUT(R305 ) and trigger the scope with signal from CH1.
3. Adjust R595 to the positive rising edge of SW PULSE at 6.5H±0.5H from the V-SYNC.
2. ELECTRICAL ADJUSTMENT
3
Adjustment Parts Checking Point Measuring Equipment Mode Test Tape
R305 DP-2
R595
PT01 PIN
¤Ø
Oscilloscope PLAY
(STAIR STEP)
CH1
CH2
1H
0.5H
6.5H ± 0.5H
VERTICAL SYNC
SW 30Hz
(PT01 PIN)
(R305)
TRIGGER
3
MODULATOR
CH-1
OSCILLOSCOPE
CH-2
R305
PHONE
JACK
PT01 R595
TOP VIEW
POWER
MODULE
6.5H±0.5H