Adjustment - Pioneer GEX-FM903XM/UC Service Manual

GEX-FM903XM

6. ADJUSTMENT

6.1 MODULATOR ADJUSTMENT
- Connection Diagram
Antenna
Jack
Linear Detector
(Spectrum Analyzer)
FM Tuner
CN502
SIDE A
- Adjustment
Tuning Voltage
Adjustment
Balance Adjustment
Modulation
Adjustment
44
DC Regulated
Power Supply
Antenna
Plug
ANTENNA
SELECT
ANTENNA OUT
UNIT
S601
RESET
CN402
IC601
CN503
Input Signal Adjusting Point
-∞ L505
-∞ VR502
400Hz 0dB VR503
ACC
BACK UP
GND
CN802
CN401
CN501
L505
VR502
BAL
VR503
Note: When ajusting, the frequency is made 89.1MHz.
Adjustment Method
DC V Meter:TV1
3.0V±0.1V
Oscilloscope:BAL
38kHz signal becomes minimum
Linear Detector(Spectrum Analyzer) MOD1 : H
129±5kHz
DC V Meter
CN801
MOD
SIDE B
Oscilloscope
Notes
MOD2 : H
MOD3 : H
TV1