Aiwa NSX-AJ800 Service Manual page 36

ADJUSTMENT – 2 <DECK>
< DECK SECTION >
1. Tape Speed Adjustment (DECK 2)
Settings : • Test tape :
• Test point :
• 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.
2. Head Azimuth Adjustment (DECK 1, DECK 2)
Settings : • Test tape :
• Test point :
• Adjustment location : Head azimuth
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.
3. PB Frequency Response Check (DECK 1, DECK 2)
Settings : • Test tape :
• Test point :
Method : Play back the 315 Hz and 10 kHz signals of the test
tape and check that the output ratio of the 10 kHz
signal with respect to that of the 315 Hz signal is
0 dB ± 5 dB.
4. PB Sensitivity Check (DECK 1, DECK 2)
Settings : • Test tape :
• Test point :
Method : Play back the test tape and check that the output level
of the test point is 110 mV ± 3 dB.
TTA–100
TP8 (Lch), TP9 (Rch)
TTA–330
TP8 (Lch), TP9 (Rch)
adjustment screw
TTA–330
TP8 (Lch), TP9 (Rch)
TTA–200
TP8 (Lch), TP9 (Rch)
5. REC/PB Frequency Response Check (DECK 2)
Settings : • Test tape :
• Test point :
• Input signal :
• Adjustment location: SFR451 (Lch)
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 adjust SFRs so that
the output of 8 kHz signals becomes 0 dB ± 1 dB with
respect to that of the 1 kHz signal.
6. REC/PB Frequency Response Check (DECK 2)
Settings : • Test tape :
• Test point :
• Input signal :
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 signals and check that the output is
0 dB ± 2.5 dB.
7. REC/PB Sensitivity Check (DECK 2)
Settings : • Test tape :
• Test point :
• Input signal :
Method : Apply a 1 kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at TP8, TP9
becomes 80 mV. Record and play back
the 1 kHz signals and check that the output is
–1 dB ± 3.5 dB.
– 36 –
TTA–602
TP8 (Lch), TP9 (Rch)
8 kHz/1 kHz (-26 dB)
SFR452 (Rch)
TTA–602
TP8 (Lch), TP9 (Rch)
8 kHz/1 kHz (-26 dB)
TTA–602
TP8 (Lch), TP9 (Rch)
1 kHz (0VU / -8.0 dB)