ADJUSTMENT (TUNER / DECK / FRONT)
< TUNER SECTION > <U, LH>
1. Clock Frequency Check7. DC Balance / Mono Distortion Adjustment
Settings : Y Test point :TP2 (CLK)Settings : Y Test point :TP3, TP4 (DC balance)
Method : Set to AM 1710kHz and check that the test point isTP8 (Lch), TP9 (Rch)
2160kHz ? 45Hz.(Mono Distortion)
Y Adjustment location : L801
2. AM VT CheckY Input level :?V 60dB
Settings : Y Test point :TP1 (VT)Method : Set to FM 98.0MHz and adjust L801 so that the
Method : Set to AM 1710kHz and check that the test point isdistortion is less than 1.2%. Then check the voltage
less than 8.5V. Then set to AM 530kHz and checkbetween TP3 and TP4 is 0 ? 500mV.V
that the test point is more than 0.6V.
8. Output Level Check
3. AM Tracking Adjustment<AM>
Settings : Y Test point :TP8 (Lch), TP9 (Rch)Settings : Y Test point :TP8 (Lch), TP9 (Rch)
Y Adjustment location : L951 (1/3)Y Input level :?V 74dB
Method : Set to AM 1000kHz and adjust L951 (1/3) so that theMethod : Set to AM 1000kHz and check that the test point is
test point becomes maximum.40mV ? 3dB.
4. AM IF Adjustment<FM>
Settings : Y Test point :TP8 (Lch), TP9 (Rch)Settings : Y Test point :TP8 (Lch), TP9 (Rch)
Y Adjustment location :Y Input level :?V 60dB
L802 ........................... 450kHzMethod : Set to FM 98.0MHz and check that the test point is
200mV ? 3dB.
5. FM VT Adjustment.
Settings : Y Test point :TP1 (VT)9. FM Separation Check
Y Adjustment location : L906Settings : Y Test point :TP8 (Lch), TP9 (Rch)
Method : Set to FM 108.0MHz and adjust L906 so that theY Input level :?V 60dB
test point bcomes 7.0V ? 0.1V. Then set to FMMethod : Set to FM 98.0MHz and check that the test point is
87.5MHz and check that the test point is more thanmore than 25dB.
0.4V.
6. FM Tracking Adjustment
Settings : Y Test point :TP8 (Lch), TP9 (Rch)
Y Adjustment location : L903
Method : Set to FM 87.5MHz and adjust L903 so that the
test point is less than 9dB?V.
� 32 �
ACEC
AIWA
