ELECTRICAL ADJUSTMENT-2/4 (HRJ, LH, U)
< TUNER SECTION >
1. AM IF Adjustment7. Wow Flutter Check
L007 ............................................................Settings: Y Measuring equipment: Wow flutter meter1400/1404kHz
Y Test tape: TTA-100 (3KHz)
2. AM VT AdjustmentY Test point: PHONES jack (J201)
Settings: Y Test point: C39+Y Adjustment location:SFR of motor section
Y Adjustment location: L0041) Connect the PHONES jack (J201) of the machine to the wow
Method:Set to AM 1602/1710kHz adjust L004 so that the testflutter meter.
point becomes 6.0V?50mV (U, LH) set to AM 1602/2) Set the indicator of the wow flutter meter to the JIS and the
1710 kHz adjust L004 so that the Test point becomesmode to W & F (or RMS or UN WTD).
5.6V?50mV (HRJ).3) Play back the test tape (TTA-100) and confirm that the wow
flutter is 0.35% or less.
3. AM Tracking Adjustment
L003 .......................................................................8. Head Azimuth Adjustment 600kHz
TC001...................................................................Settings: Y Measuring equipment: Oscilloscope1400kHz
Y Test tape: TTA-320
4. FM VT AdjustmentY Test point: PHONES jack (J201)
Settings: Y Test point: C39+Y Adjustment location:Screw for the head azimuth
Y Adjustment location: L006adjustment
Method:Set to FM 108MHz adjust L006 so that the test point1) Connect the channel 1 probe of the oscilloscope to the Rch
becomes 6.0V?50mV. and the channel 2 probe to the Lch respectively.
2) Set the V mode of the oscilloscope to the ADD mode.
5. FM Tracking Adjustment3) Play back the test tape (TTA-320) and adjust the head azimuth
L005 .....................................................................using the screw for the head azimuth adjustment so that the87.5MHz
waveform of the oscilloscope maximizes.
< DECK SECTION >4) After adjustment, lock the screw with the locking paint (bond-
lock) (1600B).
6. Tape speed Adjustment
Settings: Y Measuring equipment: Wow flutter meter
Y Test tape: TTA-100 (3KHz)< CD SECTION >
Y Test point: PHONES jack (J201)
9. Focus BIAS Adjustment
Y Adjustment location: SFR of motor sectionSettings: Y Test CD: TCD-782
1) Connect the PHONES jack (J201) of the machine to the wowY Test point: C441 (RF OUT)
flutter meter.
2) Play back the test tape (TTA-100) and adjust the SFR of theC433- (VREF)
motor for 3,000 KHz?20Hz.Y Adjustment location: SFR430
Method: Play back the test CD track 2 and so that the output
level is DC 0mV?10mV.
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