Read Harman Kardon AVR 350 (serv.man3) EMC - CB Certificate online
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Report No. 90401
Monitored point:
dT (K)
at 207V
dT (K)
at 253V
Limit dT (K)
*)
Main transformer core
37,6
47,2
95
Sub transformer core
30,3
43,7
85
Diode, D992 body
54,8
62,6
-
PWB near D992
13,1
71,9
85
Diode, D991 body
62,4
70,6
PWB near D991
65,7
74,1
85
E. Capacitor, C909 body
27,0
35,2
85
°C
FAN body (Internal main heatsink side)
15,7
19,1
60
FAN body (Internal main heatsink center)
30,0
38,9
60
IC90 body
43,7
61,2
-
PWB near IC90
33,3
46,2
85
Resistors, R810 body
35,7
46,3
-
Main heat-sink
36,5
48,6
-
TR, Q803 body
42,7
58,2
-
PWB near Q803
31,4
42,4
85
Appliance in-let body (in-side)
23,4
29,3
50
Top enclosure above main transformer
8,4
13,7
40
Top enclosure above main heat-sink
21,7
28,2
40
Stand-byswitch button (non-metallic)
0,4
1,0
50
*) Temperature rise limits for Singapore is 10K less
Winding temperature rise measurements
207V
253V
—
Ambient temperature t1 (
o
C) :
23,6
23,6
—
Ambient temperature t2 (
o
C) :
23,7
22,3
—
Temperature rise dT of winding:
R
1
(Ω)
R
2
(Ω)
dT (K)
Limit dT (K)
*)
Insulation
class
Main transf. pr. winding (207V)
1,799
2,252
64,9 95 B
Sub transf. pr. winding (207V)
1215
1374
33,7 85 E
Main transf. pr. winding (253V)
1,799
2,334
78,1 95 B
Sub transf. pr. winding (253V)
1215
1465
54,4 85 E
*) Temperature rise limits for Singapore is 10K less
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