Denon avr-681 1601 1801 ost-614 Service Manual
100 Corporate Drive Mahwah, NJ 07430
Service Bulletin
No. : OST-614
Date:
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.
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.
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:
• AVR-1601: 00001 ~ 005060 No modification applied.
• AVR-681: 00001 ~ 002000 No modification applied.
• AVR-1801: 000182 ~ 000243 No modification applied.
• AVR-681: 00001 ~ 002000 No modification applied.
• AVR-1801: 000182 ~ 000243 No modification applied.
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The information contained in this document is intended for the exclusive use by DENON Authorized Service Centers and their
employees. This document may contain information that is privileged, confidential and may be protected from disclosure under
applicable laws and terms of the DENON Service Agreement. Any distribution, disclosure, dissemination or copying of this
document and the information it contains is prohibited. No responsibility will be accepted by DENON for any damage, injury or loss
resulting from the misuse of the information contained in this document.
employees. This document may contain information that is privileged, confidential and may be protected from disclosure under
applicable laws and terms of the DENON Service Agreement. Any distribution, disclosure, dissemination or copying of this
document and the information it contains is prohibited. No responsibility will be accepted by DENON for any damage, injury or loss
resulting from the misuse of the information contained in this document.