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< TUNER SECTION >
1. Clock Adjustment
Settings :
• Test point :
TP2 (OSC)
• Adjustment location : L901
Method :
Set to AM 530kHz and adjust L901 so that the test
point becomes 1.0MHz
±
1kHz.
2. AM VT Check
Settings :
• Test point :
TP1 (VT)
Method :
Set to AM 530kHz and check that the test point is
1.0V
±
0.5V. then set to 1710kHz and check that the
test point is 7.5V
±
1.0V.
3. AM Tracking Adjustment
Settings :
• Test point :
TP8 (Lch), TP9 (Rch)
• Adjustment location :
ANT801 (Bar Antenna) ................ 600kHz
TC801 ......................................... 1400kHz
*Repeat this adjustment a few times until the wave
shape has the maximum amplitude.
4. AM IF Adjustment
Settings :
• Test point :
TP8 (Lch), TP9 (Rch)
• Adjustment location :
L806 ............................................. 450kHz
5. FM VT Adjustment.
Settings :
• Test point :
TP1 (VT)
• Adjustment location : L805
Method :
Set to FM 108.0MHz and adjust L805 so that the
test point becomes 7.0V
±
0.2V. Then set to FM
87.5MHz and check that the test point is 1.5V
±
0.1V.
6. FM Tracking Adjustment
Settings :
• Test point :
TP3 (FM-IF)
• Adjustment location : L804
Method :
Set to FM 98.0MHz and adjust L804 so that the test
point is maximum and distortion is minimum.
7. FM Separation Check
Settings :
• Test point :
PHONES (J701)
• Volume :
MAX
• Input level :
60dB, 1kHz
Method :
Set to FM 98.0MHz and check that the test point is
more than 17dB.
8. Mono Distortion Check
Settings :
• Test point :
PHONES (J701)
• Volume :
MAX
• Input level :
60dB, 1kHz
Method :
Set to FM 98.0MHz and check that the distortion
at the test point is less than 3.0%.
ADJUSTMENT
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