Aiwa NSX-VC88 Service Manual page 35

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9. DC Balance / Mono Distortion Adjustment
Settings : • Test point : TP3, TP4 (DC Balance)
: TP5(Lch), TP6(Rch) (Distortion)
• Adjustment location : L801
• Input level : 60dBµV
Method : Set to FM 98.0MHz and adjust L801 so that the
voltage between TP3 and TP4 is 0V ± 300mV with
minimum distortion.
< DECK SECTION >
10. Tape Speed Adjustment (DECK 2)
Settings : • Test tape : TTA–100
• Test point : TP7(Lch), TP8(Rch)
• Adjustment location : SFR1
Method : Play back the test tape and adjust SFR1 so that the
frequency counter reads 3000Hz ± 5Hz (FWD) and
± 45Hz (REV) with respect to forward speed.
11. Head Azimuth Adjustment (DECK 1, DECK 2)
Settings : • Test tape : TTA–300
• Test point : TP7(Lch), TP8(Rch)
• Adjustment location : Head azimuth
Method : Play back (FWD) the 10kHz signal of the test tape
and adjust screw so that the output becomes maximum.
Next, perform on REV PLAY mode.
12. PB Frequency Response Check (DECK 1, DECK 2)
Settings : • Test tape : TTA–300
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• Test point :TP7(Lch), TP8(Rch)
Method : Play back the 315Hz and 10kHz signals of the test tape
and check that the output ratio of the 10kHz signal with
respect to that of the 315Hz signal is 0dB ± 3dB.
13. PB Sensitivity Check (DECK 1, DECK 2)
Settings : • Test tape : TTA–200
• Test point : TP7(Lch), TP8(Rch)
Method : Play back the test tape and check that the output level of
the test point is 280mV ± 3dB.
14. REC/PB Frequency Response Adjustment (DECK 2)
Settings : • Test tape : TTA–602
• Test point : TP7(Lch), TP8(Rch)
• Input signal : 1kHz / 10kHz (LINE IN)
• Adjustment location : SFR351 (Lch)
Method : Apply a 1kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at the TP7,
TP8 becomes 28mV. Record and play back the 1kHz
and 10kHz signals and adjust SFRs so that the output of
the 10kHz signals becomes 0dB ± 1.0dB with respect to
that of the 1kHz signal.
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adjustment screw
SFR352 (Rch)
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15. REC/PB Sensitivity Check (DECK 2)
Settings : • Test tape : TTA–602
• Test point : TP7(Lch), TP8(Rch)
• Input signal : 1kHz (LINE IN)
Method : Apply a 1kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at TP7, TP8
becomes 280mV. Record and play back the 1kHz
signals and check that the output is –1dB ± 3.0dB.
< FRONT SECTION >
B FRONT C.B
TP10(GND)
L101
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1. µ-CON OSC Adjustment
Settings : • Test point : TP9 and TP10 (GND)
• Adjustment location : L101
Method : Insert AC plug while pressing TUNER function key.
Adjust L101 so that the frequency at the test point is
208.80Hz ± 0.2Hz.
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TP9
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