Service Manuals, User Guides, Schematic Diagrams or docs for : DENON AV Surround Receiver AV Surround Receiver Denon - AVR-1601 & 681 Service Bulletin OST-614
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100 Corporate Drive Mahwah, NJ 07430
Service Bulletin
No. : OST-614
Date: April 27, 2007
_____________________________________________________________
Model: AVR-681, AVR-1601, AVR-1801
Subject: A malfunction of the Memory Backup System.
Symptom: When the unit is left for longer than 10 minutes after disconnecting
the AC Power Cord, the unit enters the initial mode and no memory backup is
carried out.
Solution: 1) Remove the CPU Unit (1U- XXXXX).
2) Cut the circuit patterns connected to Pins #53 and #54 of IC201.
3) Attach the Rubber Sheet outlined in the Parts section.
4) Solder the lead wire of the Cathode side of Diode so that the Pins #53 and#54
are short circuited. Then, connect the other terminal of the Diode to theJ205.
5) Assemble the unit.
Parts:
Ref# Description Part Number
NA 1SR35-400A(T93X) 276 0704 903
NA Rubber Sheet 461 0415 007
Serial Number Range:
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