AIWA XPSR321
Instrukcja Serwisowa

ADJUSTMENT
< TUNER SECTION >
1. Clock Adjustment Settings : � Test point : Method : TP2 (CLK) � Adjustment location : L901 Set to AM 531 kHz and adjust L901 so that the test point becomes 1.0 MHz ± 1 kHz. 2. AM VT Check Settings : � Test point : TP1 (VT) Method : Set to AM 531 kHz and check that the test point is 1.0 V ± 0.5 V. Then set to AM 1602 kHz and check that the test point is 6.5 V ± 1.0 V. 3. AM Tracking Adjustment Settings : � Test point : TP8 (Lch), TP9 (Rch) � Adjustment location : ANT801 ....................................... 603 kHz TC801 ........................................ 1404 kHz *Repeat this adjustment a few times until the wave shape has the maximum amplitude. 4. AM IF Adjustment Settings : � Test point : TP8 (Lch), TP9 (Rch) � Adjustment location : L806 ............................................ 450 kHz 5. FM VT Adjustment. Settings : � Test point : TP1 (VT) � Adjustment location : L805 Method : Set to FM 108.0 MHz and adjust L805 so that the test point bcomes 6.8 V ± 0.2 V. Then set to FM 87.5 MHz and check that the test point is 1.5 V ±1.0 V. 7. FM Tracking Check Settings : � Test point : PHONES-OUT (volume max) Method : Set to 87.5 MHz, 108.0 MHz and check that the test point is 10 dB ± 6 dB. 8. FM Separation Check Settings : � Test point : PHONES-OUT (volume max) � Input level : 60 dB, 1 kHz Method : Set to FM 98.0 MHz and check that the separation is more than 17 dB. 9. Mono Distortion Check Settings : � Test point : PHONES-OUT (volume max) � Input level : 60 dB, 1 kHz Method : Set to FM 98.0 MHz and check that the mono distortion is less than 3.0 %. 10. Output level check <AM> Settings: �Test point : TP8 (Lch), TP9 (Rch) � Input level : 74 dB Method : Set to AM 1000 kHz and check that the test point is 100 mV ± 15 mV . <FM> Settings: �Test point : TP8 (Lch), TP9 (Rch) � Input level : 60 dB Method : Set to FM 98.0 MHz and check that the test point is 270 mV ± 15 mV.

6. FM Tracking Adjustment Settings : � Test point : TP3 (FM IF) � Adjustment location : L804 Method : Set to FM 108.0 MHz and adjust L804 so that the test point is maximum and distortion is minimum.

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