HK 3480 (serv.man2) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 46

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www.nemko.com
 
Report No.  65743 
 
 
 
11 
FAULT CONDITIONS TESTS-continued
 
P 
Comp. 
No. 
Fault Test 
V Short 
current 
Test 
time 
Fuse No Current 
through 
fuse 
Mains power/temperatures/results 
Pmax 
operat. 
Maximu
m non-
clipped 
output 
signal 
253 - 
10 
min. 
F601, 
F603, 
F604 
3,78 A 
The components are heated up to: 
- Main transf. pr. winding  : 138K 
- Sub transf. pr. winding 
: 41K 
- PWB near D601 
: 82K 
- PWB near Q319 
: 43K 
- Main heat-sink 
: 54K 
and main transformer’s thermal 
fuse opened after 10 min. 
Dielectric strength test OK. 
No hazard. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
F No = Fault Number, S-c = Short-circuit, Dis = Disconnection 
 
 
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