DENON Service Bulletin OST-614 free download

File name Service Bulletin OST-614.PDF

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: