ES 150PW (serv.man5) - JBL Audio EMC - CB Certificate (repair manual). Page 28

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Report No.: 1009950 
IEC 60065 
Clause 
Requirement + Test 
Result - Remark 
Verdict 
 
 
TRF No. IEC60065J 
7.1 
TABLE: temperature rise measurements 
 
Power consumption in the OFF/Stand-by position of 
the functional switch (W)……………………… ……..: 
0W/0.2W 
— 
 
Cond. 
Un (V) 
Hz 
In (mA) 
Pn (W) 
V out 
Pout (W) 
Operating Condition 
1 253 50 340  51  11.5  37 
2 198 50 330  40  9.8  27 
1/8 of max non-clipping output 
power (pink noise) 
Transformer model
 TD-230-0300A+C 
 
Loudspeaker impedance (Ω) ..................................: 
Measured DC resistance: 3.54Ω 
— 
 
Several loudspeaker systems 
— 
 
Marking of loudspeaker terminals 
— 
— 
 
Temperature Rise dT of Part 
dT (K) 
Limit max dT (K) 
Test Condition No. 
No 1 
No ___ 
No ___ 
 
Primary wiring insulation 
24 
60 (50) 
Transformer steel washer                               
26 
PCB 35 
85 
(75) 
Heat sink (supported by PCB) 
35 
85 (75) 
31 
60 (50) 
Rear panel, metal (likely to be touched) 
outside of heat sink 
24 -  - 
40 
(30) 
Knobs (non metallic) 
11 
50 (40) 
Top enclosure, wood 
60 (50) 
TR1 windings (measured with thermocouple) 
24 
75 (65) 
PCB (Standby SMPS) 
22 
85 (75) 
Winding temperature rise measurements 
Ambient temperature t1 (
o
C) ..............................
Ambient temperature t2 (
o
C) ..............................
21 
24 
— —  — 
— 
Temperature rise dT of winding: 
dT = (R
– R
1
) x (234.5 + t1) – (t2 – t1) 
             R
1
 
R
1
 (Ω) 
R
2
 (Ω) 
dT (K) 
Limit 
maxK) 
Insulation class 
Transformer model
 TD-230-0300A+C
 
Primary winding 
5.324 
5.994 
29 
85 (75) 
Secondary winding (red-red) 
0.4488 
0.5022 
27 
85 (75) 
Secondary winding (blue-blue) 
1.2013 
1.3435 
27 
85 (75) 
The limit values in parenthesis are the limit values for tropical climate. 
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