DUET II (serv.man3) - JBL Audio EMC - CB Certificate (repair manual). Page 60

 

 

- Page 60 of 65 - 

 

 

 Report 

No. 

114383 

 
 

IEC 60950-1:2005 / EN 60950-1:2006 

Clause 

Requirement + Test 

Result - Remark 

Verdict

 

 

TRF No. IECEN60950_1C 

 

 

 

4.5 

TABLE: Thermal requirements 

P 

 

Supply voltage (V)  .....................

264V/60Hz(adapter) 

⎯ 

Maximum measured temperature T of 
part/at:: 

T (

°C) 

Allowed 

T

max

 (

°C)

Supplied 1KHz sine wave for speakers in computer speaker system and obtain 1/8 Maximum non-clipped 
output power 

Adapter enclosure 

44.7 

81 

C20 body (rated 105

°C) 

83.4 91 

C10 body (rated 105

°C) 

65.2 91 

Heating sink near U6 

104.2 

-- 

PCB near U6 

98.4 

116 

Enclosure inside near Heating sink 

53.3 

-- 

Enclosure outside near back 

37.5 

81 

Ambient 26.0 

-- 

Having a specified maximum ambient temperature of 40°C, the maximum temperatures are calculated 
based upon a (minimum) test temperature of 26°C. Temp. limits are adjusted according to Cl. 1.4.12.3. 
Temperature limits include less 10K for thermocouple measurement method. 

Temperature T of winding: 

t

1

 (°C)

R

1

 (

Ω)

t

2

 (°C)

R

2

 (

Ω)

T (

°C) 

Allowed 

T

max

 (

°C)

Insulatio

n class

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

supplementary information: