Aiwa HS-JXM2000, Руководство по обслуживанию

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ADJUSTMENT
<RADIO 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 : TP1 (VT)
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 : TP1 (VT)
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 : IC801 (pin11,12)
• 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.
<TAPE SECTION>
8. Tape Speed Adjustment
Settings : • Test tape : TTA–100
• Test point : Phones Jack (J101)
• Adjustment location : SFR401
• Volume : MAX
• Power voltage : 1.5 V
Method : Play back the test tape and adjust SFR401 for 3015 Hz
± 10 Hz (FWD) and 3015 Hz ± 45 Hz (REV).
9. Dolby Level Adjustment
Settings : • Test tape : TTA–200
• Test point : TP3(LCH), TP4(RCH)
• Adjustment location : A, D (LCH)
B, C (RCH)
• VOLUME : MIN "0"
• Direction : FWD, REV
Method : Connect a coupling capacitor (10 uF / 16 V) between the
test point and AC voltage meter about. Check the test
point voltage for 32 mV ± 1.0 dB. If TP3,TP4 level is
hight than limit, perform this adjustment following the
procedure below:
Out level
+ 1dB up
+ 2dB up
+ 3dB up
+ 1dB up
+ 2dB up
+ 3dB up
Solder place
A
B
A, B
C
D
C, D
TP3
(LCH)
TP4
(RCH)
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