Harman Kardon AVR 10 (serv.man3) Service Manual / Technical Bulletin ▷ View online
harman/kardon Incorporated 250 Crossways Park Drive, Woodbury New York 11797 (516) 496-3400
harman/kardon
Service Bulletin
Service bulletin # H/K9905 July 1999
Warranty labor rate: MINOR repair
To:
All harman/kardon Service Centers
Models: AVR10, HK3250
Subject: Dead unit, No display
In the event you receive an AVR10 or HK3250 Audio/Video receiver with the complaint “unit is
dead, no display or output”, follow the test and repair procedure as outlined below:
1) Connect power cord to an AC outlet, and press the power button on front panel. If indicator lights on
the front panel do not turn on, unplug the unit.
2) Remove top cover. Check AC main fuse F701; if blown, replace and test unit:
AVR10
F701 2.5A slow blow (h/k part# 5508302535)
HK3250 F701 3.15A slow blow (h/k part# 5508302735)
3) If F701 is not blown, replace IC101, the LC7821 FUNCTION SELECTOR IC,
(h/k part# 5654-LC7821). IC101 (30 pin DIP) is located in the right rear corner of the MAIN PCB
when viewed from the top. To replace IC101, remove bottom cover (14 screws including 4 in the
bottom edge of the front panel).
4) Replace both covers and test unit.
Display
