Aiwa CA-DW257 EZ, Service Manual

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22 21
ELECTRICAL ADJUSTMENT
L009
L016 L017
L004
L005
L008
L007
IC001
19
TC2
TC1
TC3 TC4
PVC001
L330
J251
PHONES
SFR761
5
8
9
6
7
3
2
@
!0
0
RPH (DECK1)/PH (DECK2)
!
3
1
TC005
4
TC006
L003
FRONTC.B MAINC.B
< TUNER SECTION >
1. LW Freq. Range Adjustment
L016 ....................................................................... 145kHz
TC005 ..................................................................... 295kHz
2. MW Freq. Range Adjustment
L017 ....................................................................... 515kHz
TC003 ................................................................... 1635kHz
3. MW Tracking Adjustment
L003 ....................................................................... 600kHz
TC004 ................................................................... 1400kHz
4. LW Tracking Adjustment
TC006 ..................................................................... 288kHz
5. AM IF Adjustment
Settings: • Test point: IC001 (LA1828) 19PIN
• Adjustment location: L007
Method: Adjust L007 so that the output level at 1400kHz
becomes maximum.
6. FM Freq. Range Adjustment
L005 ..................................................................... 87.4MHz
TC001 ................................................................. 108.3MHz
7. FM Tracking Adjustment
L004 ..................................................................... 88.0MHz
TC002 ................................................................. 108.0MHz
8. FM IF Adjustment
Settings: • Test point: IC001 (LA1828) 19PIN
• Adjustment location: L008
Method: Adjust L008 so that the output level at 98.0MHz
becomes balanced.
9. FM Balance Adjustment
Settings: • Test point: IC001 (LA1828) 19PIN
• Adjustment location: L009
Method: Adjust L009 so that the output level at 98.0MHz
becomes balanced.
< TAPE SECTION >
10. Tape speed Adjustment
Settings: • Test tape: TTA-100
• Test point: J251 (PHONES jack)
• Adjustment location: SFR761
Method: Play back the test tape and adjust SFR761 so that
the frequency counter reads 3000Hz ±5Hz.
11. 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.
12. Bias frequency Adjustment
L330 ............................................................. 56kHz ±2kHz
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