Harman Kardon AVR 55 (serv.man5) 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/K9803 April 1998
Warranty labor rate: MAJOR repair
To:
All harman/kardon Service Centers
Models: AVR55
Subject: Complaints Related to Software
In the event you receive an AVR55 with one or more of the symptoms listed below, upgrade the software
by replacing microprocessors IC301 and IC810.
IC301 is located on Front PCB (PCB-3), IC810 is located on AC-3 PCB (PCB-7).
by replacing microprocessors IC301 and IC810.
IC301 is located on Front PCB (PCB-3), IC810 is located on AC-3 PCB (PCB-7).
•
Unintended shut-down while in TV source mode and active video source is NOT connected to the AVR55:
New software default is: AUTO OFF. With this upgrade AVR55 will no longer shut down.
•
Noise while a test CD or Music CD with Pre-Emphasis is played through the Digital Connection:
This audible noise was present when playing a CD with Pre-Emphasis through the digital coax and while in
surround modes: Theater, Hall, Stadium or Church. (Pro Logic and 3 Stereo modes were OK).
With this upgrade, this noise is no longer audible.
•
No Speaker Level Calibration for Front Left and Front Right channels:
After activating Test Tone cycle, only Center, Left Rear and Right rear speakers could be calibrated.
With this upgrade, Front Left and Front Right channels can be calibrated.
•
Phono button on the remote control does not switch receiver to Phono source mode:
Corrected by this upgrade.
•
Downmix function: When the number of decoder outputs is less than the number of available channels in the
Dolby Digital program (such as for example during headphone listening) downmix feature is not available:
This upgrade enables downmixing under this condition.
•
Volume tracking: Maximum level of main volume control is influenced by setting of rear channels:
After the upgrade, the two volume levels no longer affect each other.
NOTE: Early versions of the AVR55 owner’s manual on Page 26 may mention a System Reset feature.
This was incorrect; the System Reset feature is not available on this receiver.
IC 301
IC 801
OLD NEW OLD
NEW
INKEL DWP-475A
CXP82852
-124Q
INKEL DWP-475B
CXP82852
-128Q
INKEL DWP-203A
061
INKEL DWP-482
071
h/k part number
J020828521280
h/k part number
J020780420710
Model
Serial number (120V)
Status
Action
AVR55 IN0067-01001
to
IN0067-08000
Has early version of IC301 & IC810.
See Symptoms.
Replace IC301 & IC810
with newer versions.
AVR55 IN0067-11001
and above
Factory Installed
Modification
NONE REQUIRED
Display
