Pioneer F-Z92 Service Manual page 10

5. ADJUSTMENT
¢ For connections and points to be adjusted, refer to Fig. 5-1 and Fig. 5-2.
e There are no adjustment items for the AM tuner section (MW, LW).
9.1 FM TUNER SECTION ADJUSTMENT
¢ Set the BAND selector to "FM".
¢ Perform VCO adjustment two minutes or more after turning the power ON.
Note: Stereo modulation: Main 1kHz L + R +68.25Hz dev.
Pifot 19kHz +6.75kHz dev.
98.0 60
98.0MHz T1102
Stereo modulation (Note)
FM tocai oscillator contro!
voltage check
Adjustment to improve
sensitivity
Adjust so that the frequency be-
tween TP1105 and GND is 76 + 0.1
kHz.
Minimize distortion in both left
and right channel outputs (adjust
T1102 to with in +90°).
MPX distortion adjustment
Oscilloscope
Output terminal L, R (21188
FM 752 antenna terminal
Distortion
meter
——_ =e a oe — ——- = oe ew
Frequency Digital
counter voltmeter
Fig. 5-1 FM adjustment wiring diagram
15