Aiwa AP20AEZ, Service Manual, Page: 12 / 18

-12-
ELECTRICAL ADJUSTMENT-1/1
L5
PVC1
IC2
23
T2
T1
L3
L4
PVC1A
PVC1B PVC1D
PVC1C
1 6
1
test point
~
5
4
3
6
TUNER C.B (PARTS SIDE)
< TUNER SECTION >
1. AM IF Adjustment
Settings : • Test point IC2(KA22425D)23PIN
• Adjustment location: T2
T2 ................................................................................ 455kHz
Method : Set to 455kHz and adjust T2 so that the Wave.
2. AM Frequency Range Adjustment(AP20AEZ,AP20WAU
MODEL)
Settings : • Test point IC2(KA22425D)23PIN
• Adjustment location: T1,PVC1C
T1 .......................... 517kHz(AP20AEZ,AP20WAU MODEL)
PVC1C .................................... 1635kHz (AP20AEZ MODEL)
PVC1C .................................. 1750kHz (AP20WAU MODEL)
Method : Set to 517kHz and adjust T1 so that the Wave .
Method : Set to 1635kHz,1750kHz and adjust PVC1C so that the
Wave .
3. LW Frequency Range Adjustment(AP21AEZ MODEL)
Settings : • Test point IC2(KA22425D)23PIN
• Adjustment location: T1,PVC1C
T1 ................................................................................ 145kHz
PVC1C ......................................................................... 295kHz
Method : Set to 145kHz and adjust T1 so that the Wave .
Method : Set to 295kHz and adjust PVC1C so that the Wave .
4. AM Tracking Adjustment
Settings : • Test point IC2(KA22425D)23PIN
• Adjustment location: L5,PVC1D
L5 .......................................................600kHz Waveform max
(AP20AEZ,AP20WAU MODEL)
L5 ................... 150kHz Waveform max (AP21AEZ MODEL)
PVC1D .......... 1400kHz Waveform max (AP20AEZ MODEL)
PVC1D ............ 285kHz Waveform max (AP21AEZ MODEL)
PVC1D ........ 1500kHz Waveform max (AP20WAU MODEL)
Method : Set to 600kHz,150kHz and adjust L5 so that the Wave
to maximum.
Method : Set to 1400kHz,285kHz,1500kHz and adjust PVC1D so
that the Wave to maximum.
5. FM Frequency Range Adjustment
Settings : • Test point IC2(KA22425D)23PIN
• Adjustment location: L4,PVC1A
L4 ......................... 87.4MHz(AP20AEZ,AP21AEZ MODEL)
L4 ........................................... 87MHz (AP20WAU MODEL)
PVC1A ................ 108.3MHz(AP20AEZ,AP21AEZ MODEL)
PVC1A ................................... 109MHz(AP20WAU MODEL)
Method : Set to 87.4MHz,87MHz and adjust L4 so that the Wave.
Method : Set to 108.3MHz,109MHz and adjust PVC1A so that
the Wave .
6. FM Tracking Adjustment
Settings : • Test point IC2(KA22425D)23PIN
• Adjustment location: L3,PVC1B
L3 ....................................................... 88MHz Waveform max
PVC1B ............................................. 108 MHz Waveform max
Method : Set to 88MHz and adjust L3 so that the Wave to
maximum.
Method : Set to 108MHz and adjust PVC1B so that the Wave to
maximum.