AVR 8500 (serv.man2) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 15

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IEC 60065, 6th edition : 1998
 - 
- Page 11 of 44 - 
 
 
   
 
Order No. 
200211174
 
 
 
 
HEATING (continued) 
Other measured parts 
t measured 
at 207V 
t measured 
at 254,4V 
t allowed *) 
IC451 heat-sink 
45,8 
64,5 
IC534 body 
43,5 
52,6 
IC534 heat-sink 
43,3 
54,5 
PWB near IC534 
43,1 
53,9 
85 
IC536 body 
48,3 
64,5 
IC537 heat-sink 
38,2 
60,9 
IC540 body 
40,9 
56,1 
TR, QL920 body 
46,4 
63,6 
TR, QL921 body 
48,5 
67,4 
TR, QL922 body 
49,2 
68,5 
TR, QL923 body 
49,3 
68,2 
PWB near QL923 
43,3 
58,0 
85 
Main heat-sink (L) 
43,1 
58,4 
Main heat-sink (R) 
39,1 
49,5 
Appliance inlet body 
17,5 
23,2 
60 
Top enclosure above main heat-sink 
30,3 
40,6 
65 **) 
Top enclosure above main transformer 
27,5 
35,5 
65 **) 
Switch button 
0,8 
0,6 
50 
 
 
 
 
Comments 
 
 
 
No other parts were observed to create any hazard due to temperature rise.   
 
*) Temperature rise limits for Singapore is 10K less.  
 
**) Directly covering part for heat-sink and transformer. The top cover is supplied with 
ventilation openings covering most of the top cover. This indicate emission of heat from 
internal parts and the opening area is therefore not likely to be touched during normal 
use. Based on this the temp. rise is accepted also for tropical climates.  
 
 
 
 
 
 
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