Aiwa XR-M500 Service Manual page 24

7
B FRONT C.B
L201
C CD C.B
8
SFR130
TP2
(FE)
TP3
(VREF)
7
IC201
TP1 GND
(K-SCAN)
39
< DECK SECTION >
1. Tape Speed Adjustment
Settings : • Test tape : TTA–100
• Test point : TP8 (Lch), TP9 (Rch)
• Adjustment location : SFR1
Method : Play back (FWD) the test tape and adjust SFR1
so that the frequency counter reads 3000Hz ±
5Hz and ± 45Hz (REV) with respect to forward
speed.
2. Head Azimuth Adjustment
Settings : • Test tape : TTA–300
• Test point : TP8 (Lch), TP9 (Rch)
• Adjustment location : Head azimuth
adjustment screw
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.
3. PB Frequency Response Check
Settings : • Test tape : TTA–300
• Test point :TP8 (Lch), TP9 (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.
4. PB Sensitivity Adjustment
Settings : • Test tape : TTA–200
• Test point : TP8 (Lch), TP9 (Rch)
• Adjustment location :
SFR303 (Lch) SFR304 (Rch)
Method : Play back the test tape and adjust SFRs so that
the output level of the test points becomes
245mV ± 10mV.
5. REC/PB Frequency Response Adjustment
Settings : • Test tape : TTA–602
• Test point : TP8 (Lch), TP9 (Rch)
• Input signal : 1kHz / 10kHz (LINE IN)
• 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
TP8, TP9 becomes 0dB (17mV). Record and play
back the 1kHz and 10kHz signals and adjust
SFRs so that the output of the 10kHz signals
becomes 0dB ± 0.5dB with respect to that of the
1kHz signal.
6. REC/PB Sensitivity Adjustment
Settings : • Test tape : TTA–602
• Test point : TP8 (Lch), TP9 (Rch)
• Input signal : 1kHz (LINE IN)
• Adjustment location :
SFR305 (Lch) SFR306 (Rch)
Method : Apply a 1kHz signal and REC mode. Then adjust
OSC attenuator so that the output level at TP8,
TP9 becomes 0dB (170mV). Record and play
back the 1kHz signals and adjust SFRs so that the
output becomes 0dB ± 0.5dB.
< FRONT SECTION >
7. µ-CON OSC Adjustment
Settings : • Test point : TP1 (K-SCAN) and GND
• Adjustment location : L201
Method : Insert AC plug with pressing of TUNER and
DISPLAY key. Adjust L201 so that the
frequency across the test point is 194.898Hz ±
0.194Hz.
< CD SECTION >
8. Focus Gain Adjustment
Settings : • Test disc : TCD-782
• Test point : TP2 (FE), TP3 (VREF)
• Adjustment location : SFR130
Method : Play back the test disc (TCD-782, Track No.2)
and adjust SFR130 so that the voltage between
the test point (FE, VREF) becomes approx. 0mV.
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