Daewoo TVZ 1321 Service Manual page 34

1-2) PLAYBACK PHASE Adjustment
Mode Adjustment parts
Play
Location of Adjustment Parts
MAIN PCB
PY09
RN90
DECK AS
• Adjustment Procedure
1. Preparation
1) Play the Test tape (Color Bar).
2) Connect scope probe to PY 09
3) Set the Oscilloscope to the chop mode.
Connect CH1 to the H/SW(PY09) and CH2 to the V-OUT(PY09) and trigger the scope with the signal from CH1.
2. Adjustment
1) Adjust RN90 to position the falling edge of SW PULSE at 6.5H from the V-SYNC.
Check point
RN90 PY05
PY05
Y/C
BOARD
Test equipment
Oscilloscope
Observation Waveform
Horizontal Axis : 50µS/DIV
Vertical Axis : CH1 : SW30, CH2:V.OUT
(t=412 sec 20 sec)
32
Test tape Input signal
COLOR BAR