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ADJUSTMENT -1/1
MAIN C.B
1
Test point 1
1
5
3
4
Test point 2
2
4
1. AM IF Adjustment
Testpoint: IC1 (TA2104AN) 16PIN (TP1)
Adjustment location: IFT1
IFT1 .......................................................................... 450kHz
2. MW VT Check
Testpoint: R8 (TP2)
Set the frequency to be 531kHz and observe the test point
voltage.It should be 0.9~1.2V.
Change the frequency to be 1602kHz
and observe the test point voltage. It should be less than 7 V.
3. MW Tracking Adjustment
Testpoint: IC1 (TA2104AN )16PIN (TP1)
Adjustmentlocation:L10, TC2
L10 ........................................................................... 594kHz
TC2 ..........................................................................1404kHz
4. FM VT Check
Testpoint: R8 (TP2)
Adjustment location: L3
Set the frequency to be 87.5 MHz then test the voltage.
Adjust L3 so that test point voltage is 1.5 ± 0.05 V.
Change the frequency to be 108 MHzand observe the test point
voltage.It should be less than 4 V.
IFT1
IC1
16pin
R8
TC1
6
5. FM Tracking Adjustment
Testpoint: IC1 (TA2104AN) 16PIN (TP1)
Adjustmentlocation: L1
L1 ............................................................................87.5MHz
7. LW VT Check
Testpoint: R8 (TP2)
Set the frequency to be 144kHz and observe the test point
voltage.
It should be 1~1.4V.
8. LW Tracking Adjustment
Testpoint: IC1 (TA2104AN )16PIN (TP1)
Adjustmentlocation:L9, TC1
L9 .............................................................................. 153kHz
TC1 ........................................................................... 288kHz
-28-
3
L1
L10
L3
TC2
L9
5
3
6
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