33
3. VIDEO
3-1) Y NOISE REDUCTION
• 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.
Location of Adjustment Parts Observation Waveform
Y/C PCB Horizontal Axis : 10µS/DIV
Vertical Axis : 20 mV/DIV
Y/C PCB SOLDER SIDE
PY05
IY03 IY01
IY02
⊕RY34
Mode Adjustment parts Check point Test equipments Test tape Input signal
EE RY 34 PY05, PY09 Oscilloscope Multi Burst
Signal gen. with 3.58 MHz
PAY01 PAY02
CH-2 (PY05YNR)
Horizontal:10µs/DIV
Vertical:20mv/DIV
To Next Page
Loading...
