AVR 140 (serv.man4) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 45

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Report No.  65586 
 
 
11 
FAULT CONDITIONS TESTS-continued
 
P 
Comp. 
No. 
Location  Fault 
Test V 
Test  
time 
Fuse 
No. 
Current 
through 
fuse 
Temperature/Results 
C807 -  S-c 253 20 
min 
F907 
F905 
F906 
1,79 A 
Surround L channel signal output 
distorted immediately. 
Input current stabilised at 1,33A. 
R611, R821 opened. 
No hazard. 
Q804 
C - E 
S-c 
253 
10 min 
F907 
F905 
F906 
- 
Unit shut down immediately. 
Input current stabilised at 0,01A. 
F905, F906 opened. 
Q803, Q804 shorted and 
R810 opened. No hazard. 
Q804 
B - C 
S-c 
253 
10 min 
F907 
F905 
F906 
- 
Unit shut down immediately. 
Input current stabilised at 0,01A. 
Q803 shorted.  No hazard. 
C813 -  S-c 253 20 
min 
F907 
F905 
F906 
1,29 A 
Surround L channel signal output 
off immediately. 
Input current stabilised at 1,26A. 
No component damaged. 
No hazard. 
D962 
A - C 
S-c 
253 
12 min 
- 
1,47 A 
Sub transformer primary winding 
heated-up to 106K and thermal 
fuse 
opened after 12 min. 
Dielectric strength test O.K. 
No hazard. 
C906 
- 
S-c 
253 
11 min 
- 
0,04 A 
Mains relay off immediately. 
Sub transformer primary winding 
heated-up to 110K and thermal 
fuse 
opened after 11 min. 
Dielectric strength test O.K. 
No hazard. 
C911 
- 
S-c 
253 
2 hr 
- 
0,02 A 
Mains relay off immediately. 
Sub transformer primary winding 
heated-up to 87K and stabilised. 
Dielectric strength test O.K. 
No hazard. 
Speaker 
Terminal 
Surroun
d 
(
L - ch.)
 
S-c 
253 
10 min 
F907 
- 
Unit shut down immediately. 
Input current stabilised at 0,01A. 
No component damaged. 
No hazard. 
F No = Fault Number, S-c = Short-circuit, Dis = Disconnection 
 
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