Aiwa NSX-D30 Service Manual page 39

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<DECK Section>
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Preparation
• Measuring instruments: Wow-flutter meter / Oscilloscope / Millivoltmeter / Low frequency generator / Attenuator
• Test tape: TTA-100 / TTA-300 (or TTA-310, 320) / TTA-200 / TTA-602 (or equivalent playback/record test tape)
10. Tape Speed Adjustment (DECK 2)
Requirement
• Measuring instrument: Wow-flutter meter (frequency counter)
Test tape: TTA-100(3kHz)
Test point: J201(HP OUT)
Adjustment location: SFR1
1) Connect J201(HP OUT) of the unit to the wow-flutter meter.
2) Insert the test tape (TTA-100) to DECK 2. Forward and play back the middle part of the tape
and adjust SFR1 so that the level is 3,000Hz±5Hz.
11. Tape Speed Check (DECK 1)
Requirement
• Measuring instrument: Wow-flutter meter (frequency counter)
Test tape: TTA-100(3kHz)
Test point: J201(HP OUT)
Adjustment location: SFR1
1) Insert the test tape (TTA-100) to DECK 1. Play back the middle part of the tape and check that
the speed compared to that of DECK 2 is ranged within 55Hz.
12. Wow-Flutter Check (DECK 1 and DECK 2)
Requirement
• Measuring instrument: Wow-flutter meter (frequency counter)
Test tape: TTA-100(3kHz)
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Test point: J201(HP OUT)
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Adjustment location: SFR1
1) Connect J201(HP OUT) of the unit to the wow-flutter meter.
2) Set the wow-flutter meter to JIS for INDICATOR and W RMS (WTD) for mode.
3) Play back the middle part of the test tape (TTA-100) and check that the level is 0.25% or less.
13. Head Azimuth Adjustment (DECK 1 and DECK 2)
Requirement
• Measuring instrument: Oscilloscope
Test tape: TTA-300(10KHz)
Test point: TP8(LCH),TP9(RCH)
Adjustment point: Head azimuth adjustment screw
1) Connect the CH1 probe of the oscilloscope to TP8 (LCH) and the CH2 probe to TP9 (RCH).
2) Set the V mode of oscilloscope to ADD.
3) Insert the test tape (TTA-300) to DECK 1. Forward and play back the middle part of the tape
and adjust the head azimuth adjustment screw so that the waveform during playback of 10kHz
becomes maximum.
4) After adjustment, secure the screw with bonding (1600B).
5) Apply the above step 3 and 4 to DECK 2.
14. Frequency Playback Check (DECK 1 and DECK 2)
Requirement
• Measuring instrument: Millivoltmeter
Test tape: TTA-300(315Hz / 10KHz)
Test point: TP8(LCH),TP9(RCH)
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1) Connect the CH1 of millivoltmeter to TP8 (LCH) and the CH2 to TP9 (RCH).
2) Insert the test tape (TTA-300) to DECK 1 and play back 315Hz and 10KHz.
3) Check that the level of 10kHz is ranged within ±3dB compared to the output level
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of 315Hz as a reference.
4) Apply the above step 2 and 3 to DECK 2.
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