AVR 355 (serv.man6) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 21

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- Page 13 of 42 - 
 
 
 
 
Report No.  98388 
 
 
11.2.3 
Temperature rise of parts, other than windings, 
providing electrical insulation 
See appended table. 
 
Temperature rise of printed circuit boards (PCB) 
exceeding the limits of table 3 by max. 100 K for max. 
5 min 
No exceeding the limits of 
Table 3. 
N/A 
 
a) Temperature rise of printed circuit boards (PCB) to 
20.1.3, exceeding the limits of table 3 by not more 
than 100 K for an area not greater than 2 cm² 
 
N/A 
 
b) Temperature rise of printed circuit boards (PCB) to 
20.1.3 up to 300 K for an area not greater than 2 cm² 
for a maximum of 5 min 
 
N/A 
 
Meets all the special conditions if conductors on 
printed circuit boards are interrupted 
No conductors are 
interrupted/peeled/ollsened 
during fault conditions. 
 
Class I protective earthing maintained 
Class II apparatus. 
N/A 
11.2.4 
Temperature rise of parts acting as a support or 
mechanical barrier 
Temperature rises are 
within the limits. 
11.2.5 
Temperature rise of windings 
See appended table. 
11.2.6 
Temperature rise of parts not subject to the limits of 
11.2.1 to 11.2.5 
No excessive temperature 
observed/measured on  
other parts. 
 
 
 
12 MECHANICAL 
STRENGTH 
 
12.1.1 
Bump test where mass >7 kg 
No damage in the sense of 
this standard. 
12.1.2 Vibration 
test 
Assessed to be satisfactory 
constructed. 
12.1.3 
Impact hammer test 
No damage in the sense of 
this standard. 
 
Steel ball test 
No damage in the sense of 
this standard. 
12.1.4 
Drop test for portable apparatus where mass  
< 7 kg 
No portable apparatus. 
N/A 
12.1.5 
Thermoplastic enclosures strain relief test 
Tested, 70ºC, 7h
 
12.2 
Fixing of knobs, push buttons, keys and levers 
Normal use will not impair 
the protection against 
electric shock. 
 
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