Adjusting / Checking method:
1. Adjust with VR103 to 4.39 + 0.05 MHz.
● If adjusted to 4.39 MHz in no signal state, the frequency
of sync tip is set to 4.20 MHz when there is a signal.
4.39 f 0.05 MHz
7. Y FM Deviation Adjustment
Meaauring Point
TP141 (CH1)
TP105 (EXT)
TP143 (GND)
Input Signal / Alignment Tape
Color bar (Y signal only)
ADJ. Location
ADJ. / Check Value
VR104 1.00 k 0.05 Vp-p
Preparation:
● POWER switch: “ON”
● Power mode button : “PIAYER” and “CAMERA
● Short pin @ and pin @ of J1OO5.
wAn AV cord should be connected, and the video output
terminal should be terminated at 75 Q .
Adjusting / Checking method:
1. Record the color bar Y signal.
2. Play back the recorded signal.
3. Check the playback level.
It should be within 1.00 f 0.05 Vp-p.
4. When the level does not meet the specification, turn
VR104 as follows, and repeat 1. to 3.
Counterclockwise (o): When larger than specified value
Clockwise (o): When smaller than specified value
2-8. AUDIO CIRCUIT (For VM-EX400P)
[CP1 BOARD]
TP143
1. fO Adjustment
Measuring point I Measuring Equipment Condition
1
TP261 (CH1)
TP143 (GND)
P
(WR5-5CSP): For operation check
ADJ. Location ADJ. / Check Value
VR261
Preparation:
● POWER switch: “ON”
● Power mode button : “PLAYER”
Adjusting / Checking method:
1. Set the oscilloscope to AC 50 mV/div, 0.5usec/div.
2. Adjust with VR261 so that playback FM waveform has
the same amplitude in high frequency range and low
frequency range.
● Expand sweep of the time base to O.1,usec/div.
same level
–19–
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