AVR 345 - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 49

 

 

- Page 5 of 7 - 

 

 

 

Report No.  79765 

 

 

 

 

 

Comp. 
No. 

Location  Fault 

Test V 

Test  
time 

Fuse 
No. 

Current 
through 
fuse 

Temperature/Results 

FAN 

(built-in 
main heat 
sink - side)

 

Locked  253 

- 

3hr 

F907 

2,35 A 

Normal operated. 
The components are heated up to :
-Main transf. pr. Winging  : 104,6K
-Main transformer core 

: 80,8K 

-Sub transf. pr. Winging  : 70,4K 
-Sub transformer core 

: 65,0K 

-PWB near Q803 

: 96,9K 

-PWB near D991 

: 98,6K 

-PWB near D992 

: 77,7K 

and stabilised. 
Dielectric strength test ok. 
No hazard. 

FAN 

(built-in 
main heat 
sink – center) 

Locked 253 

- 

2hr 
45min 

F907 

2,35 A 

Unit shut down after 4 min. 
Input current stabilised at 0,018A. 
Dielectric strength test OK. 
No hazard. 

Pmax 

operating

 

- Maximu

m non-
clipped o
utput sig
nal 

253 

14 min 

F901 

5,26 A 

Main transformer primary winding 
heated-up to 141K and thermal  
fuse opened after 14 min. 
Input current stabilised at 0,018A. 
Dielectric strength test O.K. 
No hazard. 

 

 

 

 

 

 

 

 

F No = Fault Number, S-c = Short-circuit, Dis = Disconnection