FL 8450 (serv.man12) - Harman Kardon Audio Technical Bulletin (repair manual)

fl 8450 (serv.man12) technical bulletin
Model
FL 8450 (serv.man12)
Pages
1 Few pages! See other manuals at the bottom of the first or last page.
Size
8.6 KB
Type
PDF
Document
Technical Bulletin
Brand
Device
Audio
File
fl-8450-sm12.pdf
Date

View Harman Kardon FL 8450 (serv.man12) Technical Bulletin online

 
 
harman/kardon
  
 
     Service Bulletin
 
 
Service bulletin # 9603 -March 1996 
 
 
Warranty labor rate: MAJOR repair
 
 
To: All harman/kardon Service Centers 
 
Models: FL8400 / FL8450 CD changers 
 
Subject: Revisions to improve; Drawer mechanics, and Servo circuits 
_____________________________________________________________________________________ 
 
In the event you receive a unit from a consumer with a complaint of the drawer not closing  you may need to 
make revisions to that unit. All units that have serial numbers below those listed in this service bulletin need 
to be revised. 
 
Due to tolerances in manufacturing of chassis parts it is possible that the teeth of the drawer and those of the 
drive gear do not always mesh correctly. A result of the aforementioned, the drawer will not close 
completely.  
 
This bulletin also addresses the improvements made to the servo circuits used in these units. The servo 
circuits may oscillate at 500 KHz modulated by 88KHz and cause circuits to run hot and become less 
reliable. 
 
Procedure for revised drawer mechanics.  Perform on units with serial number less than; 
I001-31001 for FL8400, and I009-04000 for FL8450. Remove Loading gear Assembly (Sub Ass’y C ). 
Remove poly washer (W5) from the loading gear (22). Lift loading gear off shaft and place a .5mm poly 
washer ( hk part no. 8338300910) on shaft and replace gear. Discard washer (W5), instead use .2mm 
washer (8338300910-1) to secure gear. Realign drawer synchronization.  
 
 
 
Procedure for revised servo drive circuit.  Perform on units with serial number less than; 
I001-36001 for FL8400, and I009-06001 for FL8450.  
 
 
 
Model 
Install a 
1000 pF between 
pins 1 and 2 
Install a 
1000 pF between 
pin 5 and GND 
Install a 
10 K ohm between 
pins 2 and 3 
Install a 
10 K ohm between 
pins 5 and 6 
FL8400 
IC 105 
IC 105 
IC 106 
IC 106 
FL8450 
IC 106 
IC 106 
IC 101 
IC101 
 
 
 
 
 
 
 
 
harman/kardon Incorporated, 80 Crossways Park West, Woodbury, New York 11797 (516) 496 3400 
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Here you can view online and download Harman Kardon FL 8450 (serv.man12) Technical Bulletin in PDF. FL 8450 (serv.man12) technical bulletin will guide through the process and help you recover, restore, fix, disassemble and repair Harman Kardon FL 8450 (serv.man12) Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.

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