DOWNLOAD Harman Kardon AVR 660 Service Manual ↓ Size: 218.17 KB | Pages: 2 in PDF or view online for FREE

Model
AVR 660
Pages
2 Few pages! See other manuals at the bottom of the first or last page.
Size
218.17 KB
Type
PDF
Document
Service Manual / Technical Bulletin
Brand
Device
Audio
File
avr-660.pdf
Date

Harman Kardon AVR 660 Service Manual / Technical Bulletin ▷ View online

 
 
harman/kardon
    
         Service Bulletin 
 
AVR 660 AVR 760 AVR 7550HD 
 
 
  November 2009
 
                               
                                                
 
 
Harman International 
                              8500 Balboa Blvd., Northridge, CA 91329, USA 
 
Service bulletin # HK2009-002 
 
 
 
 
 
                                  
 
 
  
To:   
All harman/kardon Service Centers 
 
   Models: 
AVR 660/230, AVR 760/230 and AVR7550HD 
 
Subject: Fan 
Noise 
 
 
In the event you receive one of the above-mentioned AVR models with the complaint “FAN NOISE”, carry 
out the following modification. 
 
Parts: Kit # AVR760660FANKIT (220 Ohms / 1W resistor in parallel with 330uF 25V 105C Electrolytic Cap  
 
 
To Black wire of Fan supply 
Soft wire must go to D-Ground on connector Board
 
 
1. Remove the top cover (13 screws) 
2. Locate the FAN  (picture 1) 
 
 
      Picture 1 
 
 
 
 
 
 
 
 
 
 
BLACK and RED Wire for FAN supply 
 
FAN 
 
 
 
Picture 2 
 
3. Locate the Black wire (See Picture 1 close up) 
4. Cut the Black wire as shown in picture 2 
 
 
 
 
 
 
 
 
 
 
 
 
harman/kardon
    
         Service Bulletin 
 
AVR 660 AVR 760 AVR 7550HD 
 
 
  November 2009
 
                               
                                                
 
 
Harman International 
                              8500 Balboa Blvd., Northridge, CA 91329, USA 
 
 
Picture 3 
 
5. Connect the Kit with the two ends of the Black wire 
that was cut in item 4 by twisting the pin of the kit 
around the two ends and solder it. (See Picture 3) add 
flex to cover the solder point. 
 
 
 
 
 
 
 
 
 
 
 
    
Picture 
 
6. Solder the other end of the kit to solder joint indicated in  
Picture 4. This is on the connector board.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7
. Fix the kit to the cables as shown on picture 5  
8. Re-mount the top-cover 
 
 
 
 
         Picture 5 
9. Confirm the unit is working 
 
 
 
Note: This modification changes the behavior of the Fan control. 
Before modification:  Fan will start after 10-20 minutes when a certain 
temperature is reached inside the unit. The Fan starts a level 1 and from there on 
steps up in levels as heat sink temperature goes up, following an increase in the 
sound level. 
After modification: A new level 0 is added, This starts the Fan as soon the unit is 
ON, but the Fan will run at slow speed that does not create Fan noise, and is 
slower than level 1. This results in sufficient cooling when playing at low sound 
levels, and the user will not hear the Fan when listing to TV or other sources at low 
sound level (volume up to about -40dB, depending on the source) and will go to 
level 1 or higher levels, if the sound level is increased.  
  
Model 
Serial number 
Status 
Action 
AVR 660/230 
AVR 760/230 
AVR 7550HD 
TBA 
If the customer complaint of 
Fan noise then perform 
above modification 
Modification 
Display

Harman Kardon AVR 660 Service Manual / Technical Bulletin ▷ Download

  • DOWNLOAD Harman Kardon AVR 660 Service Manual ↓ Size: 218.17 KB | Pages: 2 in PDF or view online for FREE
  • Here you can View online or download the Service Manual / Technical Bulletin for the Harman Kardon AVR 660 in PDF for free, which will help you to disassemble, recover, fix and repair Harman Kardon AVR 660 Audio. Information contained in Harman Kardon AVR 660 Service Manual / Technical Bulletin (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.