Adjustments
2. TAPE SECTION
Output Level
MeasurementInput Point
PointScope
R-CH47 kohm
VTVM
Input Level
Measurement
Point
L-CH47 kohm
Test Tape be used
TapeContents Use
MTT-111N3 KHzTape Speed Adjustment
MTT-114N10 KHzHead Azimuth Adjustment
MTT-5511BlankRecord Frequency Property
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?500Hz
TAPE ALIGNMENT CHART
StepItemReference Value Test Tape Adjust PointTest PointNoteFIG.
Line Out L/R Confirm Wow & Flut-
3,015~3,025HzMTT-111N RV601FIG.1
Channelter is within 0.35%
NormalConfirm Tape Speed
Line Out L/R of end position after
Tape Speed 3,000~3,010HzMTT-111N RV601FIG.1
1Channeladjustment at tape
Adjustment
start position
Confirm High speed
Line Out L/R
High5,820~6,180HzMTT-111N - - - - - -Channelafter normal speed FIG.1
adjustment
Maximum Level Line Out L/R
2Azimuth AdjustmentMTT-114N Head ScrewFIG.2,3,4
Phase:Within90 Channel
Recording Bias Oscilla-Adjust with frequency
TP603,GND
3tor Frequency Adjust-80 KHz?0.5MTT-5511L603counter connected.FIG.1
ment
Adjust with Frequency
Counter Connected
Test Tape : MTT-111N(3kHz)Frequency Counter
MTT-5511(Blank)
Set
Output Level
Measurement PointForwardReverse
SideSide
FIG. 1 : Tape Speed & Record Bias Oscillator FIG. 2 : Tape Azimuth Adjust Location
Frequency Adjust Circuit(Record/Playback Head)
L-CH
PeakL-CHOscilloscope
Test Tape
within(10kHz)MTT-114N
1 dBSetVH
within
R-CH1 dB
PeakOutput Level
ScrewMeasurement Point
AngleOutput Level
Screen Pattern
L-CHR-CHScrew AngleIn Phase 45 90 135 180
PeakPeakGoodWrong
FIG. 3 : Tape Azimuth Adjust Head Screw & WaveformFIG. 4 : Tape Azimuth Adjust Circuit & Waveform
5 |
ACEC
