Service Manuals, User Guides, Schematic Diagrams or docs for : DENON AV Surround Receiver AV Surround Receiver Denon - AVR-3300 Service Bulletin OST-620

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Service Bulletin OST-620


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                                  100 Corporate Drive Mahwah, NJ 07430



                                                                                       Service Bulletin
                                         No. : OST-620
                                         Date: January 23, 2007
_____________________________________________________________

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.


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:
   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):
   Note: The JV23 Wire on the 1U-2301-1, Regulator Unit has been replaced
   with a 82 resistor for reducing the rotation speed.



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