harman/kardon
Service Bulletin
Service bulletin # 9601 -January 1996
Warranty labor rate: MINOR repair
To: All harman/kardon Service Centers
Models:AVR-20/AVR-20II Surround receiver/amplifier
AVR-25/AVR-25II
Subject: Poor or intermittent reception of FM
_____________________________________________________________________________________
In the event you receive a unit from a consumer with a complaint “FM cuts out intermittently” use the
procedure listed below in addition to the procedure listed in the service manual for FM alignment.
To supplement the manual, for FM center tuning alignment follow these procedures;
AVR20/AVR20II
Alignment
Equipment
settings
Adjust
Adjust
For
Quadrature
Tune to a known strong FM
station around center of the
band (98.1MHz)
T803
0 VDC across R809, confirm by tuning to
another strong station.
Repeat step 1 in service manual for minimum distortion. Repeat both steps again for optimum sensitivity.
*
note: step #4 in AM IF states adjustment point VR802, should be VR801
step #2 in FM IF states adjustment point VR801, should be VR802
AVR25/AVR25II
Alignment
Equipment
settings
Adjust
Adjust
For
Quadrature
Tune to a known strong FM
station around center of the
band (98.1MHz)
T903
0 VDC across R914, confirm by tuning to
another strong station.
Repeat step 1 in service manual for minimum distortion. Repeat both steps again for optimum sensitivity.
harman/kardon Incorporated, 80 Crossways Park West, Woodbury, New York 11797 (516) 496 3400
