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ADJUSTMENT <TUNER / FRONT>
< 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.
< 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).
� 30 �
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