Aiwa CA-DW735M, Service Manual

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12 11
<TUNER SECTION>
1. AM VT Adjustment
Settings: • Test point: TP1
• Adjustment location: L52
Method: Set to AM 530 kHz adjust L52 so that the test point
becomes 1.3 V ± 0.05 V.
2. AM Tracking Adjustment
L61 ............................................................................... 600 kHz
CT51 .......................................................................... 1400 kHz
3. FM VT Adjustment
Settings: • Test point: TP1
• Adjustment location: L5
Method: Set to FM 87.5 MHz adjust L5 so that the test point
becomes 4.0 V ± 0.3 V.
4. FM Tracking Adjustment
L2, L3 ...................................................................... 87.5 kMHz
5. DC balance/ MONO Distortion Adjustment
Settings: • Test point: TP2, TP3
• Adjustment location: IFT101
• Input level: 60 dB
Method: Set to FM 98.0 MHz and adjust IFT101 so that the
voltage between TP2 and TP3 becomes 0 V ± 0.02 V.
6. AM tuning Adjustment
Settings: • Adjustment location: SFR102
Method: Make setup for AM 1400 kHz. Adjust SFR102 so that
the machine performs Auto Stop when 50 ± 2 dB is
input.
* Confirm that TP4 is “L” at this time.
7. FM tuning Adjustment
Settings: • Adjustment location: SFR101
Method: Make setup for FM 98.0 MHz. Adjust SFR101 so that
the machine performs Auto Stop when 33 ± 2 dB is
input.
* Confirm that TP4 is “L” at this time.
<TAPE SECTION>
8. Tape Speed Adjustment (DECK1)
Settings: • Test tape: TTA-100
• Adjustment location: SFR751
Method: Play back the test tape with DECK1 and adjust SFR751
so that the output frequency is 3000 Hz. After the ad-
justment, check that the frequency of DECK2 is 3000
± 45 Hz.
9. Azimuth Adjustment (DECK1, DECK2)
Settings: • Test tape: TTA-320
• Adjustment location:
Head azimuth adjustment screw
Method: Play back the 10 kHz signal of test tape and adjust
screw so that the output becomes maximum.
10. Bias OSC Fequency Adjustment
Settings:• Test tape: TTA-601
• Adjustment location: L301
• Test point: TP301
Method: Set to the REC mode. Adjust L301 so that thr fre-
quency counter of the test point becomes 71.5 kHz ±
0.5 kHz
PRACTICAL SERVICE FIGURE
<RADIO SECTION>
<FM>
Frequency range: 87.5 ~ 108.0 MHz
IHF Sensitivity: 18.0 ± 5.0 dB (at 87.5 MHz)
(Distortion 3%): 19.0 ± 5.0 dB (at 98.0, 108.0 MHz)
S/N ratio: 60 ± 5.0 dB (at 98.0 MHz)
Intermediate frequency: 10.7 MHz
Stereo separation: More than 20 dB
<AM>
Frequency range: 530 ~ 1710 kHz
Sensitivity: 50 ± 5 dB (at 600 kHz)
45 ± 5 dB (at 1000 kHz)
43 ± 5 dB (at 1400 kHz)
Intermediate frequency: 450 kHz
+40
–45
<TAPE RECORDER SECTION>
Recording bias frequency: 71.5 ± 0.5 kHz
Erasing ratio (400 Hz, 0 dB): More than 60 dB
Distortion (T. H. D 10%):
Less than 3.0% (PB)
S/N ratio: More than 40 dB (AC/DC, PB)
More than 37 dB (AC, REC/PB)
Noise (PB) Less than 1 mV/0.6 mV
(AC/DC, MIN)
Tape speed: 3000 ± 90 Hz
Wow & flutter: Less than 0.4% (JIS UN WTD)
Take-up torque: 45 ± 15 g-cm
F.F & REW torque 100 g-cm
ADJUSTMENT
0
8
4
3
5
6
7
5
1
2
L152
L301
MFT101
IC101 SFR102
L52
L61
SFR101
R102
R107
SFR751
IFT101
PN751
TP1
TP2
TP3
TP4
L5
L3
L2
9 1
A MAIN C.B
RPH (DECK1)/PH(DECK2)
TP301
R334
CT51
9
BAR ANT.