HK 3490 (serv.man2) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 49

 

 

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 Report 

No. 

98503 

 
 

*), C561, S-c;  
Normal operated. Input current stabilised at 1,80A.  
R999 damaged. No hazard. (Tested time; 10 min)  

N/A N/A 

**), C561, S-c;  
Normal operated. Input current stabilised at 1,69A.R999 damaged.   
No hazard. (Tested time; 10 min) 

N/A N/A 

*), D703 (A to C), S-c;  
Normal operated. Input current stabilised at 1,80A. R998 damaged.   
No hazard. (Tested time; 10 min) 

N/A N/A 

*), C763, S-c;  
Normal operated. Input current stabilised at 1,80A. R996 damaged.   
No hazard. (Tested time; 30 min) 

N/A N/A 

*), D704 (A to C), S-c;  
Normal operated. Input current stabilised at 1,90A. R998 damaged.   
No hazard. (Tested time; 30 min) 

N/A N/A 

*), C112, S-c;  
Sub transformer thermal fuse opened after 9 min.   
Dielectric strength test OK. No hazard. (Tested time; 9 min)  

Sub transf. 

102,8 

Sub transf.

150 

*), D110 (A to C), S-c;  
Sub transformer thermal fuse opened after 10 min.   
Dielectric strength test OK. No hazard. (Tested time; 10 min) 

Sub transf. 

105 

Sub transf.

150 

*), Q319 (C to E), S-c;  
Unit shut down immediately, except front display.  
Input current stabilised at 0,25A. Q321, Q317 damaged. F603, F604 opened. 
No hazard. (Tested time; 10 min) 

N/A N/A 

*), Q319 (C to B), S-c;  
Unit shut down immediately. Input current stabilised at 0,01A. 
Q321, Q319, Q317 damaged.  R347 damaged. 
No hazard. (Tested time; 10 min) 

N/A N/A 

**), Q321 (C to E), S-c;  
Unit shut down immediately. Input current stabilised at 0,01A. 
Q321 damaged. F603, F604 opened. No hazard. (Tested time; 10 min) 

N/A N/A 

**), Q321 (C to B), S-c;  
Unit shut down after 2 sec. Input current stabilised at 0,01A. 
Q319, Q317, R347 damaged. F603, F604 opened. 
No hazard. (Tested time; 10 min) 

N/A N/A 

**), C307, S-c;  
Left speaker output voltage dropped (at 2,34V) immediately. 
Input current stabilised at 1,08A. Q319, R351 damaged.  
No hazard. (Tested time; 30 min) 

N/A N/A 

*)  Tested voltage 253V               **)  Tested voltage 198V

F No = Fault Number, S-c = Short-circuit, Dis = Disconnection, O-I = Over Loaded