DSC 1000 - JBL Audio EMC - CB Certificate (repair manual). Page 89

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Page 35 of 47 
  Report No: JSH0406744-001.  
EN 60065 
Clause 
Requirement - Test 
Result - Remark 
Verdict 
 
 
Ambient temperature t2 (
o
C) ...............................:   
—  
Temperature rise dT of winding: 
R
1
 (O) 
R
2
 (O) 
dT (K) 
Limit dT 
(K) 
Insulation 
class 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
* The limit value reduced by 10K due to the  thermal coupler method used. 
 
7.2 
TABLE: softening temperature of thermoplastics 
Temperature T of part 
T - normal condi-
tions (
o
C) 
T - fault condi-
tions (
o
C) 
T softening 
(
o
C) 
 
 
 
 
 
 
 
 
 
 
 
 
 
10.3 
TABLE: insulation resistance measurements 
Insulation resistance R between: 
R (MO) 
Required R (MO) 
Between mains poles (primary fuse disconnected) 
>100 
Between parts separated by basic or supplementary insulation 
>100 
Between parts separated by double or reinforced insulation 
>100 
 
10.3 
TABLE: electric strength measurements 
Test voltage applied between: 
Test voltage (V) 
Breakdown 
Mains poles (primary fuse disconnected) 
2120 
No 
Between parts separated by basic or supplementary insulation 
2120 
No 
Between parts separated by double or reinforced insulation 
4240 
No 
 
11.2 
TABLE: summary of fault condition tests 
 
Voltage (V) 0,9 or 1,1 times rated voltage  ........... :  100-240 
—  
 
Ambient temperature (
o
C) .................................. :  25 
—  
Monitored point: TR1 insulation tape between primary and secondary. 
Under fault conditions specified below 
dT (K) 
Limit dT (K) 
One diode short circuit, fuse FU1 opened immediately. 
EC16 short circuit, fuse FU1 opened immediately. 
PH2 pin 1-2 short circuit, power consumption 26 - 38W, no extreme high 
temperature, no hazard. 
57 
105 (T130) 
PH2 pin 3-4 short circuit, as normal, no hazard. 
51 
105 (T130) 
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