Denon avr-3300 ost-620 Service Manual
100 Corporate Drive Mahwah, NJ 07430
Service Bulletin
No. : OST-620
Date:
Date:
January 23, 2007
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Model:
AVR-3300
Subject:
The cooling fan is noisy.
Symptom:
The customer complains the cooling fan is too noisy. The noise
level increases at a high-speed rotation due to the metal-bearings on the Fan.
Also, the noise will increase when the Fan is driven at a high-speed.
Also, the noise will increase when the Fan is driven at a high-speed.
Solution:
The Metal bearing fan has been replaced with the Ball Bearing type
fan.
Parts:
Ref# Description
Part
Number
ZD901 MTZJ12A
2760644
966
FAN
FAN (80*80) 24V (H)
421 0769 001
Serial Number:
The modification differs depending on the production date of the unit as outlined
below:
below:
1) For units that were produced in April 2000 and the before. (Serial Number
004**** and before): Replace the Cooling Fan only.
2) The units that were produced in May 2000 and the after. (Serial
Number005**** and after):
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CONFIDENTIALITY NOTICE:
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.
Note: The JV23 Wire on the 1U-2301-1, Regulator Unit has been replaced
with a 82Ω resistor for reducing the rotation speed.•••• Replace the JV23, 82Ω
resistor with a Jumper Wire and replace the Fan with the new one.
with a 82Ω resistor for reducing the rotation speed.•••• Replace the JV23, 82Ω
resistor with a Jumper Wire and replace the Fan with the new one.