Aiwa XH-N3, Service Manual

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< DECK SECTION >
1. Tape Speed Adjustment
Settings : • Test tape : TTA–100
• Test point : TP1 (Lch), TP2 (Rch)
• Adjustment location : SFR1
Method : Play back the test tape and adjust SFR1 so that
the test point becomes 3000Hz
±
5Hz (FWD)
and FWD SPEED
±
45Hz (REV).
2. Head Azimuth Adjustment
Settings : • Test tape : TTA–330
• Test point : TP1 (Lch), TP2 (Rch)
• Adjustment location : Head azimuth
adjustment screw
Method : Play back the 8kHz signal of the test tape and
adjust screw so that the output becomes
maximum. Next, perform on each FWD and
REV PLAY mode.
3. PB Frequency Response Check
Settings : • Test tape : TTA–330
• Test point : TP1 (Lch), TP2 (Rch)
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 -2.0dB
±
3dB.
4. PB Sensitivity Check
Settings : • Test tape : TTA–200
• Test point : TP1 (Lch), TP2 (Rch)
Method : Play back the 400Hz signal of the test tape and
check that the output level at TP1, TP2 is
280mV
±
3dB.
5. REC/PB Frequency Response Adjustment
Settings : • Test tape : TTA–602 (NORMAL)
• Test point : TP1 (Lch), TP2 (Rch)
• Input signal : 1kHz/10kHz (–20VU)
• 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 TP1, TP2 becomes 16mV.
Record and play back the 1kHz and 10kHz
signals and adjust SFRs so that the output level
of the 10kHz signal becomes 0dB
±
1.0dB
with respect to that of the 1kHz signal.
6. REC/PB Sensitivity Check
Settings : • Test tape : TTA–602 (NORMAL)
• Test point : TP1 (Lch), TP2 (Rch)
• Input signal : 1kHz (0VU)
Method : Apply a 1kHz signal and REC mode.
Then adjust OSC attenuator so that the output
level at the TP1, TP2 becomes 160mV.
Record and play back the 1kHz signal and
check that the output level is 0dB
±
2.5dB.
< FRONT SECTION >
7.
µ
-con Clock Adjustment
Settings : • Test point : TP10 (K-SCAN)
TP11 (GND)
• Adjustment location : L101
Method : Insert AC plug while pressing the TUNER
function key and POWER key.
Connect a frequency counter across TP10 and
TP11. Then adjust L101 so that the test point
becomes 141.14Hz
±
0.14Hz.
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