Video - Daewoo DVN-14F6N Service Manual

3. VIDEO

3-1) Y NOISE REDUCTION
Mode Adjustment parts
EE
Location of Adjustment Parts
Y/C PCB
RY34
IY03 IY01
PAY01
Y/C PCB SOLDER SIDE
• Adjustment Procedure
1. Preparation
1) Supply the MULTI BURST signal to the VIDEO IN JACK.
2. Adjustment
1) Set the VCR to the STOP(EE) MODE.
2) Set the Oscilloscope to the chop mode.
Connect CH1 to the V-OUT(RY09) and CH2 to the CNR TP(RY05) and trigger the scope with the signal from CH1.
3) Adjust RY34 to the 3.58MHz Y component of MULTI BURST signal becomes less than [20]mVp-p.
Check point
RY 34 PY05, PY09
PY05
IY02
PAY02
Test equipments
Oscilloscope
Signal gen.
Observation Waveform
Horizontal Axis : 10µS/DIV
Vertical Axis : 20 mV/DIV
33
Test tape Input signal
Multi Burst
with 3.58 MHz
CH-2 (PY05YNR)
Horizontal:10µs/DIV
Vertical:20mv/DIV