Akai ACR-24MPU, Service Manual

Page: 8 / 36

8
ALIGNMENT PROCEDURES
FM ADJUSTMENT
Equipment Required
z AM IF/RF signal generator
z Solid-state voltmeter (SSVM)
z Regulated DC power supply
z 2-CH voltmeter
z Distortion meter
FM Alignment Using FM Signal Generator
Note:
Press the radio power switch to on the radio. Signal generator output must be kept as low as possible
to avoid overload and clipping.
Step Generator
Coupling
Generator Display
Setting
Adjustment Remarks
Stereo
Separation Signal
Generator
to antenna
receptacle 98.1 MHz
Int. 1 kHz
Dev. 75 kHz
L+R = 90 %
pilot = 10 %
98.1 MHz
VR1 Adjust AF
output power
at maximum
separating
more than 30 dB
FM SNC
Adjustment 98.1 MHz
Dev. 75 kHz
L+R=90 %
Int. 1 kHz
60dBµV output
98.1 MHz
@ 40 dBµ
98.1 MHz
VR2
Stereo Separation
25 dB (±5 dB)
Stop
Sens. Signal Generator
to antenna
receptacle 98.1 MHz
Mod. 1kHz
Dev 75kHz
98.1 MHz
VR3
Adjust AF to
stop station.
Note:
The tuner module is well-adjust and adjustment is not recommended.