harman/kardon Service Bulletin
Service bulletin # HK2004-04 Rev1 August 2005
Warranty labor rate: MAJOR repair
To: All harman/kardon Service Centers
Model: AVR325, AVR525, AVR430, AVR630
Subject: Rewiring Bias/Fan cables
In the event you receive an AVR325, AVR525, AVR430 or AVR630 with the complaint: “the unit
intermittently goes in standby or the fan runs constantly” perform the following modification. Please
note other component or connection failures can cause the unit to go in to standby.
Synopsis: Hard wire Bias/Fan cables (7 cables, 12 connectors) from Bias PCB’s to main PCB, surround PCB.
Recheck all bias voltages.
1) Remove the top cover
2) Remove the DSP and Processor boards.
3) Locate and identify Bias cables connecting Bias and Surround PCB’s to main PCB:
All models MAIN PCB Location: P805, N801, N802, N803, N804
AVR430,630 SURROUND PCB Location: N301,P307 AVR325,525 SURROUND PCB Location: P307, P310
All models BIAS PCB Location: P812, P813, P814, P815, P816
AVR325 harman/kardon
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