Aiwa FR-C150 User Manual download pdf (Page 30)

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< TUNER SECTION >

1. Clock frequency Check

Settings : • Test point : TP2 (CLK)

Method : Set to AM 1710kHz and check that the test point is

2160kHz ± 45Hz.

2. AM VT Check

Settings : • Test point : TP1 (VT)

Method : Set to AM 1710kHz, AM 530kHz and check that the test

point is less than 8.5V(1710kHz) and more than

0.6V(530kHz).

3. AM Tracking Adjustment

Settings : • Test point : TP8 (Rch), TP9 (Lch)

• Adjustment location :

L951(1/3) ...................................... 1000kHz

Method : Set to AM 1000kHz and adjust L951(1/3) so that the test

point is maximum.

4. AM IF Adjustment

Settings : • Test point : TP8 (Rch), TP9 (Lch)

• Adjustment location :

L802 ................................................ 450kHz

5. FM VT Adjustment

Settings : • Test point : TP1 (VT)

• Adjustment location : L907

Method : Set to FM 108.0MHz and adjust L907 so that the test

point becomes 7.0V ± 0.05V. Then set to FM 87.5MHz

and check that the test point is more than 0.5V.

6. FM Tracking Adjustment

Settings : • Test point : TP8 (Rch), TP9 (Lch)

• Adjustment location : L904

Method : Set to FM 98.0MHz and adjust L904 so that test point is

maximum. and distortion is minimum.

7. FM Tracking Check

Settings : • Test point : TP8 (Rch), TP9 (Lch)

Method : Set to FM 98.0MHz and check that the test point is

less than 9.0dBµV.

8. DC Balance / Mono Distortion Adjustment

Settings : • Test point : TP3, TP4 (DC Balance)

: TP8 (Rch), TP9 (Lch) (Distortion)

• Adjustment location : L801

• Input level : 60dBµV

Method : Set to FM 98.0MHz and adjust L801 so that the

distortion is less than 1.3%. Then check the voltage

between TP3 and TP4 is 0V ± 0.5V.

ADJUSTMENT <TUNER / FRONT>

< FRONT SECTION >

1. µ-CON OSC Adjustment

Settings : • Test point : TP1 (O-K-SCAN) and GND

• Adjustment location : L101

Method : Insert AC plug while pressing TUNER function key.

Adjust L101 so that the frequency at the test point is

78.4Hz ± 0.08Hz (12.742ms ~ 12.768ms).

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Aiwa FR-C150 User Manual Page 30

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