BDT 20 - BDT 2 (serv.man2) - Harman Kardon Audio Service Manual (repair manual). Page 12

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No VFD display   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                           
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                 
 
 
 
 
 
 
Check  whether the volt age 
between VF D F+ &VFD  F- is 
DC 4V+/-0.4
 
 
Go 
No 
No 
No VFD display 
Yes 
Fix the conn ection power board 
CN502 front board XS603
Check  whether the volt age 
5V,12V on th e front bo ard is  
normal work or not.
Check DC12V to AC 4V switch circuit 
Replace U
602
Yes 
Check w
hether 
the 
voltage    38 V is normal
 
 
No 
Check the ZD602 on the front board 
 
Trouble shooting chart
5-4
harman/kardon
BDT 2 / BDT 20 Service Manual
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