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ADJUSTMENTS
Step
Item
Normal
Tape Speed
1
Adjustment
High
2
Azimuth Adjustment
Recording Bias Oscilla-
3
tor Frequency Adjust-
ment
Test Tape : MTT-111N(3kHz)
MTT-5511(Blank)
Set
FIG. 1 : Tape Speed & Record Bias Oscillator
Frequency Adjust Circuit
L-CH
Peak
within
1 dB
R-CH
Peak
Screw
Angle
L-CH
Peak
FIG. 3 : Tape Azimuth Adjust Head Screw & Waveform
TAPE ALIGNMENT CHART
Reference Value
Test Tape
3,000~3,010Hz
MTT-111N
5,820~6,180Hz
MTT-111N
Maximum Level
MTT-114N
Phase:Within90°
±
MTT-5511
80 KHz
0.5
Frequency Counter
Output Level
Measurement Point
within
1 dB
Screw Angle
R-CH
Peak
Adjust Point
Test Point
Line Out L/R
RV601
Channel
Shorted
- - - - - -
TP601,
TP602
Line Out L/R
Head Screw
Channel
CM617,GND
L601
Adjust with Frequency
Counter Connected
Forward
Side
FIG. 2 : Tape Azimuth Adjust Location
(Record/Playback Head)
Test Tape
MTT-114N
(10kHz)
L-CH
In Phase 45
Good
FIG. 4 : Tape Azimuth Adjust Circuit & Waveform
6
Note
Be sure Wow & Flut-
ter is within 0.35%
Adjust Tape Speed of
end position after
adjustment at tape
start position
Be sure High speed
after normal speed
adjustment
Adjust with frequency
counter connected.
Reverse
Side
Oscilloscope
V
H
Set
Output Level
Measurement Point
Screen Pattern
90
135
180
Wrong
FIG.
FIG.1
FIG.1
FIG.2,3,4
FIG.1
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