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Adjustments
1. TAPE SECTION
Input Level
Measurement
Point
Test Tape be used
Tape
MTT-111N
MTT-114N
MTT-5511
HEAD ADJUSTMENT (AZIMUTH)
1. 10KHz test tape(example: MTT-114N) must be used for this adjustment.
2. Connect to VTVM or oscilloscope to the headphone jack or speaker terminal.
3. Press the play button.
4. Adjust the azimuth by using a screw driver to maintain the max. L&R output voltage.
5. Adjust tape A(1), tape B(2) respectively, Please secure the azimuth position by using locking paint.
RECORDING BIAS OSCILLATOR FREQUENCY ADJUSTMENT
1. Connect the frequency counter to TP603, GND.
2. Press the REC button.
3. Adjust L603 to obtain 80 KHz
Step
Item
Normal
Tape Speed
1
Adjustment
High
2
Azimuth Adjustment
Recording Bias Oscilla-
tor Frequency Adjust-
3
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
Output Level
Measurement
Point
47 kohm
R-CH
L-CH
47 kohm
Contents
±
100Hz
TAPE ALIGNMENT CHART
Reference Value
Test Tape
3,015~3,025Hz
MTT-111N
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
R-CH
Screw Angle
Peak
Input Point
VTVM
3 KHz
10 KHz
Blank
Adjust Point
Test Point
Line Out L/R
RV601
Channel
Line Out L/R
RV601
Channel
Shorted
TP601,
- - - - - -
TP602
Line Out L/R
Head Screw
Channel
TP603,GND
L603
FIG. 2 : Tape Azimuth Adjust Location
(Record/Playback Head)
Test Tape
MTT-114N
(10kHz)
FIG. 4 : Tape Azimuth Adjust Circuit & Waveform
- 4 -
Scope
Use
Tape Speed Adjustment
Head Azimuth Adjustment
Record Frequency Property
Note
Confirm Wow & Flut-
ter is within 0.35%
Confirm Tape Speed
of end position after
adjustment at tape
start position
Confirm High speed
after normal speed
adjustment
Adjust with frequency
counter connected.
Adjust with Frequency
Counter Connected
Forward
Reverse
Side
Side
Oscilloscope
L-CH
V
H
Set
Output Level
Measurement Point
Screen Pattern
In Phase 45
90
135
180
Good
Wrong
FIG.
FIG.1
FIG.1
FIG.1
FIG.2,3,4
FIG.1
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