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2-7. VIDEO CIRCUIT
1 . Playback Frequency Characteristics Adjustment
[Connection]
VR191
[Adjustment I Check]
Measuring Point
Measuring Equipment
J 1 005 @ (CH 1 )
Oscilloscope
J 1 005 ® (EXT)
J 1 005 @ (GN D)
(WR5 - 7CE): For frequency
ADJ. Location
VR1 9 1 /1 92
4.5 MHz : 8.5 MHz = 4 : 3
Preparation:
• POWER switch: "PLAYER"
Adjusting I Checking method :
• Trigger slope [+): CH-A, [ - ): CH-8
1 . Adjust with the VR1 91 (CH-A) and VR1 92 (CH-8) so that
the ratio between 4.5 MHz level and 8.5 MHz level is
nearly 4 : 3.
1
2 MHz
l
4.5 MHz
7 MHz
m
m
VR1 92
Condition
Playback
I
Input Signal
Alignment Tape
characteristics check
ADJ. / Check Value
V: 1 00 mV/d
H: 2 msec/d1v
8.5 MHz
2. Flying Erase Check
[Connection]
[Adjustment I Check]
Measuring Point
TP1 92 (CH 1 )
TP1 41 (GND)
ADJ. Location
Preparation:
• POWER switch: "CAMERA"
• Stand-by switch: "STANDBY"
Adjusting I Checking method:
• Short pin @ , pin ® and pin @ of J1 005.
1 . Confirm that the oscillation frequency is 6.0 to 9.0 M Hz,
and that the oscillation voltage is 5.0 to 1 0.0 Vp-p.
iv
.
- 5 - 1 5 -
QCH2
Measuring Equipment
Oscilloscope
I
Input Signal
Alignment Tape
Arbitrary
ADJ. / Check Value
Oscillation frequency: 6.0 to 9.0 M Hz
Oscillation voltage: 5.0 to 1 0.0 Vp-p
0.1 1 to 0. 1 7 µsec
Condition
Record
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