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T4 Nut Adjustment
Direction
CW
CCW
Post Limit
Post
Tape Limit
A
T3Post
NG
T4Post
OK
5.6.23. CTL REC/PB Output Level Confirmation
Specification
Test Point
Mode
Tape
M. EQ.
A/C Head must be fixed.
1. Set the VTR to 25M Mode, and record a color bar signal and
playback the just recorded portion. Then observe the CTL.
2. The CTL level is in the specifications in the following table.
CTL Output Level C1,C2
PLAY
REV×1
C1,C2>=1.8V
C1,C2>=1.4V
1. If the PLAY Output Level is NG. Then confirm the A/C Head Height.
2. If the REV Output Level is NG. Then confirm the T4 Post Height.
REV CTL Output
Increase
Decrease
B
C
D
NG
OK
NG
OK
OK
NG
Refer to Figure
TP30 (SERVO:F1)
Self recording and playback
Work Tape
Oscilloscope
REV×0.2
C1,C2>=1.2V
REV T3 Post Lower
Limit
More
Less
E
F
NG
NG
NG
NG
36
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