Read Harman Kardon AVR 35 (serv.man12) Technical Bulletin online
harman/kardon Incorporated 250 Crossways Park Drive, Woodbury New York 11797 (516) 496-3400
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harman/kardon
Service Bulletin
Service bulletin # H/K2000-01 March 2000
Warranty labor rate: MINOR repair
To:
All harman/kardon Service Centers
Models: AVR35/AVR45/AVR65
Subject: No Output Using Digital Inputs
In early versions of the AVR35, AVR45 and AVR65, the IC484 +5v regulator may overheat and go into thermal
protection. Its +5 volt output will cease; when this happens the AC-3 and Surround Processor cannot function
normally when using the coaxial or optical digital inputs, and the audio output will go dead.
In the event you receive an AVR35, AVR45 or AVR65 A/V receiver with the complaint “when using the
digital inputs, either coaxial or optical, the unit’s output goes dead after several minutes and the words
‘No Data’ appear in the display”, perform the following modification:
1) Remove the top cover, (14) Philips screws; set the unit on its side and remove the bottom cover, (8) Philips
screws.
2) Locate R486, R495 (10 ohm 1 watt resistors) and IC484 (+5v regulator) on the MAIN PCB. See Figure 1.
The parts are located near the front right corner of the MAIN PCB when viewed from the front. IC484 is
attached to a rectangular aluminum heatsink.
attached to a rectangular aluminum heatsink.
3) Desolder and remove R486, R495 and IC484. The IC484’s heatsink has two additional soldered connections
at the bottom of the MAIN PCB. See Figure 2.
4) Replace R486 and R495 with (2) 15 ohm 3 watt resistors, (h/k part# J1771150771X), soldered in series to
measure 30 ohms each. See Figure 3. Replace IC484 with +5v regulator, (h/k part# J1217780002X). Use
silicon grease when attaching the new regulator to the heatsink, and tighten it sufficiently to the heatsink with
its single mounting screw before re-soldering in place.
silicon grease when attaching the new regulator to the heatsink, and tighten it sufficiently to the heatsink with
its single mounting screw before re-soldering in place.
5) When all new parts are installed, replace both the top & bottom cover.
6) Test the unit by connecting a music source to a digital input, either optical or coaxial, powering it up and
6) Test the unit by connecting a music source to a digital input, either optical or coaxial, powering it up and
monitor the receiver playing normally for extended period of time.
harman/kardon Incorporated 250 Crossways Park Drive, Woodbury New York 11797 (516) 496-3400
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Models: AVR35/AVR45/AVR65 Subject: No Output in Digital Playback Mode
Model Serial
number
120V
Serial number
230V RDS
Status Action
AVR35
AVR45
AVR65
JS0007-01000
to
JS0007-14748
JS0001-01000
to
JS0001-11139
JS0003-01000
to
JS0003-02319
JS0005-01000
to
JS0005-05956
JS0004-01000
to
JS0004-04434
Modified by factory
IC484 Overheating;
Unit’s output ceases and
“No data” appears in the
display when using digital
inputs
Replace R486 and R495
with (2) 15 ohm 3 watt
resistors, soldered in
series to measure 30
ohms each.
Replace IC484 +5v
regulator
AVR35
AVR45
AVR65
JS0007-14749
Or higher
JS0001-11140
Or higher
JS0003-02320
Or higher
JS0005-05957
Or higher
JS0004-04435
Or higher
Modified by factory
Modified by factory
NONE REQUIRED
Display