AIWA CA-DW247U
Manual de Servicio

ELECTRICAL ADJUSTMENT
< TUNER SECTION >
1. AM Freq. Range Adjustment L006 ....................................................................... 517kHz TC003 ................................................................... 1750kHz 2. AM Tracking Adjustment L003 ....................................................................... 600kHz TC004 ................................................................... 1400kHz 3. AM IF Adjustment Settings:

PRACTICAL SERVICE FIGURE
< TUNER SECTION >
< FM SECTION >
Sensitivity: (THD 3%) Signal to Noise Ratio: (Input 54dB) Distortion: (Input 54dB) Intermediate frequency: Stereo separation: Less than19dB (88.0MHz) Less than19dB (98.0MHz) Less than19dB (108.0MHz) More than 57dB (at 98.0MHz) Less than 1.5% (at 98.0MHz) 10.7MHz ±0.3MHz More than 18dB

FRONTC.B

MAINC.B
L007 L008

6 5
L003

3
IC001 L009 19 TC1 TC2 L006 TC3 TC4 PVC001

7 1

4
0 0 5 L

Method:

� Test point: IC001 (L81828) 19PIN � Adjustment location: L007 Adjust L007 so that the output level at 1000kHz becomes maximum.

< AM SECTION >
Sensitivity: (S/N 10dB) Distortion: (Input 74dB) Intermediate frequency: Less than 45dB (at 600kHz) Less than 48dB (at 1000kHz) Less than 45dB (at 1400kHz) Less than 1.5% 450kHz±5kHz

0 0 4

2

4. FM Freq. Range Adjustment L005 ..................................................................... 87.0MHz TC001 ................................................................. 109.0MHz 5. FM Tracking Adjustment L004 ..................................................................... 90.0MHz TC002 ................................................................. 108.0MHz 6. FM IF Adjustment Settings: � Test point: IC001 (L81828) 19PIN � Adjustment location: L008 Method: Adjust L008 so that the output level at 98.0MHz becomes balanced. 7. FM Balance Adjustment Settings: � Test point: IC001 (L81828) 19PIN � Adjustment location: L009 Method: Adjust L009 so that the output level at 98.0MHz becomes balanced.

2

< CASSETTE SECTION >
Tape speed: Wow & flutter: Take-up torque: FF torque: Rew torque: Back tension: S/N ratio: Distortion: Noise (PB): Erasing Ratio (W/FILTER): 3000Hz±30% Less than 0.35% (JIS RMS) 30-60g-cm (DECK 1/2) 55-140g-cm (DECK 1/2) 55-140g-cm (DECK 1/2) 3±2g-cm More than 40dB Less than 3.0% (PB) Less than 1mV (AC/DC, MIN) More than 40dB

L
L330

< TAPE SECTION >
8. Tape speed Adjustment Settings: � Test tape: TTA-100 � Test point: J251 (PHONES jack) � Adjustment location: SFR761 Play back the test tape and adjust SFR761 so that the frequency counter reads 3000Hz ±5Hz.

0

Method:

J251 PHONES SFR761

98

8

9. Head Azimuth Adjustment Settings: � Test tape: TTA-320 � Test point: J251 (PHONES jack) � Adjustment location: Azimuth adjustment screw. Method: Play back the 8kHz signal of the test tape and adjust screw so that the output becomes maximum. 10. Bias frequency Adjustment L330 ............................................................. 56kHz ±2kHz

RPH (DECK1)/PH (DECK2)

9

21

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