Aiwa HS-JX989 AH Service Manual page 11

ADJUSTMENT
<TUNER SECTION>
1. AM IF Adjustment
IFT801 ................................................................... 450 kHz
2. FM IF Adjustment
TC702 ....................................................... 10.7/10.75 MHz
3. AM VT Check
Settings : • Test point :
Method : Set to AM 531 kHz and TP1, check the test point
is 1.0 ~ 1.6 V.
Then set to AM 1602 kHz and check that the test point
is less than 7.8 V.
4. FM VT Check
Settings : • Test point :
Method : Set to FM 87.5 MHz and TP1, check the test point
voltage is 2.7 ~ 3.3 V.
Then set to FM 108.0 MHz and check that the test
point voltage is less than12.0 V.
5. AM Tracking Adjustment
L801 ...................................................................... 630 kHz
TC801 .................................................................. 1440 kHz
6. FM Tracking Adjustment
TC701 .................................................................. 76.0 MHz
7. FM VCO Adjustment
Settings : • Test point :
• Adjustment location : SFR801
Method : Connect a frequency counter to pin 11 & 12 of IC801.
Adjust SFR 801 such that the frequency counter
indicates 19kHz ± 100 Hz.
TP1 (VT)
TP1 (VT)
IC801 (pin11,12)
<TAPE SECTION>
8. Tape Speed Adjustment
Settings : • Test tape :
• Test point :
• Adjustment location : SFR401
• Volume :
• Power voltage :
Method : Play back the test tape and adjust SFR401 for 3015 Hz
± 10 Hz (FWD) and 3015 Hz ± 45 Hz (REV).
– 11 – – 6 –
TTA–100
Phones Jack (J101)
MAX
1.5 V