Aiwa NSX-VC220, Service Manual

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11. Tape Speed Adjustment (DECK 2)
Settings : • Test tape : TTA–100
• Test point : TP8 (Lch), TP9 (Rch)
• Adjustment location : SFR1
Method : Play back the test tape and adjust SFR1 so that the
test point becomes 3000 Hz ± 5 Hz (FWD) and FWD
SPEED ± 45Hz (REV) with respect to forward speed.
12. Head Azimuth Adjustment (DECK 1, DECK 2)
Settings : • Test tape : TTA–330
• Test point : TP8 (Lch), TP9 (Rch)
• Adjustment location : Head azimuth
adjustment screw
Method : Play back (FWD) the 8 kHz signal of the test tape and
adjust screw so that the output becomes maximum.
Next, perform on REV PLAY mode.
13. PB Frequency Response Check (DECK 1, DECK 2)
Settings : • Test tape : TTA–330
• Test point : TP8 (Lch), TP9 (Rch)
Method : Play back the 315 Hz and 8 kHz signals of the test
tape and check that the output ratio of the 8 kHz
signal with respect to that of the 315 Hz signal is
0 dB ± 3 dB.
14. PB Sensitivity Check (DECK 1, DECK 2)
Settings : • Test tape : TTA–200
• Test point : TP8 (Lch), TP9 (Rch)
Method : Play back the test tape and check that the output level
of the test point is 110 mV ± 3 dB.
15. REC/PB Frequency Response Check (DECK 2)
Settings : • Test tape : TTA–602
• Test point : TP8 (Lch), TP9 (Rch)
• Input signal : 8 kHz/1 kHz (-20 VU / 0dB)
Method : Apply a 1 kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at TP8, TP9
becomes 10 mV. Record and play back the 1 kHz and
8 kHz signals and check that the output of the 8 kHz
signal is 0 dB ± 5 dB with respect to that of the 1 kHz
signal.
16. REC/PB Sensitivity Check (DECK 2)
Settings : • Test tape : TTA–602
• Test point : TP8 (Lch), TP9 (Rch)
• Input signal : 8 kHz (0VU / 0 dB)
Method : Apply a 8 kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at TP8, TP9
becomes 100 mV. Record and play back
the 8 kHz signal and check that the output is
–1 dB ± 3.5 dB.