Aiwa NSX-VC58 Service Manual page 33

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B FRONT C.B
3 7 63 1515 0
G DECK C.B
SFR1
TE
L 13942296513
10
< DECK SECTION >
10. 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
frequency counter reads 3000Hz ± 5Hz (FWD) and
FWD SPEED ± 45Hz (REV).
11. Head Azimuth Adjustment (DECK 1, DECK 2)
Settings : • Test tape :
• Test point :
• Adjustment location : Azimuth adjustment screw
Method : Play back (FWD) the 8kHz 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 :
• Test point :
Method : Play back the 315Hz and 8kHz signals of the test tape
and check that the output ratio of the 8kHz signal with
respect to that of the 315Hz signal is within 0 ± 5.0dB.
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13. PB Sensitivity Check (DECK1, DECK2)
Settings : • Test tape :
• Test point :
.
Method : Play back the test tape and check that the output level of
the test piont is 230mV ± 3dB.
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TP6
(GND)
TTA-100 (3kHz)
TP8 (Lch), TP9 (Rch)
TTA-330
TP8 (Lch), TP9 (Rch)
TTA-330
TP8 (Lch), TP9 (Rch)
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TTA-200 y
TP8 (Lch), TP9 (Rch)
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8
FL401
IC101
100
L331
16
DECK-1 P,DECK-2 R/P/E HEAD
Q Q
3 6 7 1 3 1 5
11
14. REC/PB Frequency Response Adjustment (DECK 2)
Settings : • Test tape :
• Test point :
• Input signal :
• Adjustment location : SFR351 (Lch), SFR352 (Rch)
Method : Apply a 1kHz signal and REC mode. Then adjust OSC
attenuator so that the output level at the test points
becomes 10mV. Record and play back the 1kHz and
8kHz signals and adjust SFRs so that the output level of
the 8kHz signals becomes 0dB ± 0.5dB with respect to
that of the 1kHz signal.
15. REC/PB Sensitivity Check (DECK 2)
Settings : • Test tape :
• Test point :
• Input signal :
Method : Apply a 1kHz signal and REC mode. Then adjust OSC
attenuator so that the output level at the test points
becomes 100mV. Record and play back the 1kHz signal
and check that the output is -2dB ± 3dB.
<FRONT SECTION>
16. µ-CON OSC Adjustment
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Settings : • Test point : TP5 (K-SCAN) and TP6 (GND)
• Adjustment location : L331
.
Method : Insert AC plug with pressing of POWER and TUNER
function key. Adjust L331 so that the frequency across
the test point is 153.85Hz ± 0.15Hz.
– 33 –
9 4 2 8
TP5
(K-SCAN)
0 5 8 2 9 9 4 2 8
11
TTA-602
TP8 (Lch), TP9 (Rch)
8kHz/1kHz (LINE IN)
TTA-602
TP8 (Lch), TP9 (Rch)
1kHz (LINE IN)
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9 9
9 9