Pioneer CDX-FM1277 Service Manual page 47

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6.4 MODULATOR ADJUSTMENT
- Connection Diagram
Linear Detector
(Spectrum Analyzer)
FM Tuner
DC V Meter
TE
L 13942296513
- Adjustment
Tuning Voltage
Adjustment
Balance Adjustment
Modulation
Adjustment
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Antenna Antenna
Jack
Plug
ANTENNA OUT
VR301
CN201
EXTENSION UNIT
CD Signal Adjusting Point
-∞ L402
-∞ VR301
400Hz 0dB (*1) VR302
or
499Hz 0dB
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*1 : L and R are input at the same time.
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2 9
8
ANTENNA
SELECT
UNIT
TV
BAL
VR302
L302
MOD
CN401
Q Q
3 6 7 1 3 1 5
L402
CN801
CN803
CN802
ACC
BACK UP
DC Regulated
Power Supply
GND
Note: When ajusting, the frequency is made 89.1MHz.
Adjustment Method
DC V Meter:TV
3.0V±0.1V
Oscilloscope:BAL
38kHz signal becomes minimum
Linear Detector(Spectrum Analyzer) LEVEL = 7
135±5kHz
or
Oscilloscope:MOD
0.23Vpp
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CDX-FM1277,FM1279
9 4 2 8
Oscilloscope
0 5 8 2 9 9 4 2 8
Notes
m
9 9
9 9
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