Aiwa CSD-NS1, Service Manual

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ELECTRICAL ADJUSTMENT-4/4 (K, EZ MODEL)
< TUNER SECTION >
1. FM VT Check
Settings: • Test point: TP4
Method: Set to FM 87.5MHz, 108.6MHz and check that the test
point is more than 0.5V (87.5MHz) and less than 8.0V
(108.6MHz).
2. FM TRACKING Check
Settings: • Test point: TP8 (Lch)
TP9 (Rch)
Method: Set to FM 98.0MHz and check that the test point is
less than 13dBµV.
3. DC Balance Adjustment
Settings: • Test point: TP5, TP6
• Adjustment location: L771
• Input level: 50dBµV
Method: Set to FM 83.0MHz, 98.0MHz and adjust L771 so that
the voltage between TP5 and TP6 becomes 0V±0.04V.
4. VT MW Check
Settings: Test point: TP4
Method: Set to AM 1602kHz, 531kHz and check that the test
point is more than 0.6V (531kHz) and less than 8.0V
(1602kHz).
5. AM IF Adjustment
Settings: • Test point: TP8 (Lch)
TP9 (Rch)
• Adjustment location: L772
Method: Set to MW 999kHz, 1000kHz and adjust L772 so that
the Wave to maximum.
6. MW Tracking Adjustment
Settings: • Test point: TP8 (Lch)
TP9 (Rch)
• Adjustment location: L981
Method: Set to MW 999kHz, 1000kHz and adjust L981 so that
the test point is less than 58dBµV and becomes
maximum. After adjust, lock it with PARAPFIN.
7. LW Tracking Adjustment
Settings: • Test point: TP8 (Lch)
TP9 (Rch)
• Adjustment location: L941 (Low)
TC942 (Hight)
Method: Set to LW 144kHz, 290kHz and adjust L941, TC942
so that the test point is less than 70dBµV(low),
66dBµV(hight) . After adjust, lock it with PARAPFIN.
< DECK SECTION >
8. Tape speed Adjustment
Settings: • Test tape: TTA-100
• Test point: PHONES JACK (J201)
• Adjustment location: SFR1
Method: Play back the test tape and adjust so that the output
frequency is 3000Hz ±30Hz.
9. Azimuth Adjustment
Settings: • Test tape: TTA-320
• Test point: PHONES JACK (J201)
• Adjustment location:Azimuth adjustment screw
Method: Play back the test tape and adjust so that the output is
maximum.
10. REC Bias Adjustment
Settings: • Test tape : TTA: 602
• Test point: JW222
+
JW221
-
• Adjustment location: L331
Method: Rec play the test tape and adjust so that the test point
frequency is 83kHz±0.5kHz.
< CD SECTION >
11. CD Focus BIAS Adjustment
Settings: • Test Disc: TCD-782
• Test point: TP1
+
Vref
-
• Adjustment location: SFR530
Method: Play back the test CD track 2 and adjust so that the
output level is DC 0mV±10mV.
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