Harman Kardon AVR-65 Sevice Bulletin

harman/kardon Service Bulletin

Service bulletin # H/K9805 Rev. 1 January 1999
To: All harman/kardon Service Centers
Models: AVR65 AM/FM Receiver, North America (120v) version
Subject: Hum or Buzz in loudspeakers

In the event you receive an AVR65 with the complaint of “There is a hum or buzz coming from the

peakers in one or more channels”, perform the necessary steps listed below: s

1. Disconnect all external cables including power cord.

2. Remove the (14) screws holding the top cover to the receiver; remove cover.

3. Locate Fuses FU481 & FU482; they are on the Main PCB in the right front quadrant of the receiver.

4. Remove and discard FU481 and FU482 and replace with h/k part# FS1067, (2A Slo-Blo 5 x 20mm
GMC type).

5. Replace the top cover; set the unit on its side on a padded surface.

6. Remove the (8) screws holding the bottom grille screen in place.

7. Locate power supply capacitors C481/C482 and IC482 (See diagrams); they are located in the right
front quadrant of the Main PCB.

8. Solder an insulated 16 - 20 gauge (0.5 to 1.0 mm
on C481/C482 (8200 63v) and the ground lead on IC482 (-15v regulator).

9. Replace bottom screen; re-connect all external cables and test the receiver.

2

) jumper wire between the common (ground) point

Model Serial number (120V) Status Action

AVR65 JS0003-01001

to

JS0003-07704 *

AVR65 JS0003-07705

and above

* Any unit in this serial number range with a small green dot attached to the left of the serial number on the outer
carton has been modified.

Needs Modification Replace FU481 & FU482;

Attach ground wire

according to instructions

Changed by factory NONE REQUIRED

harman/kardon Incorporated 250 Crossways Park Drive, Woodbury New York 11797 [phone]