ON STAGE 400P (serv.man4) - JBL Audio EMC - CB Certificate (repair manual). Page 71

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IEC 60950-1 (ed.1)
 
Page 1 of 1
 - 
 
 
www.nemko.com
 
Report No.  100711 
 
 
TRF No. IECEN60950_1C 
 
 
ATTACHMENT: CHINESE DIFFERENCES
 
Test results according to CB BULLETIN No. 112A, December 2006 
 
 
Clause 
Requirement - Test 
Result - Remark 
Ver-
dict 
1.4.5 Supply 
tolerance: 
Item 1.4.5 of IEC 60950 stipulates the 
tolerance of rated voltage is +6% and –10%, 
while GB4943-2001 makes a specification of 
tolerance of +10% and –10%. 
Class III equipment.  
 
1.7.1 
Power rating marking: 
Item 1.7.1 of IEC 60950 does not specify 
concrete figures of markings for supply voltage 
and frequency, instead, descriprions are give 
by examples. But the examples do not include 
Chinas`s mains voltage. 
GB4943-2001 stiplulates that: 
- A single rated voltage shall be expressed as 
220V 
- When a rated volrage range is given, the 
range shall cover 220V 
- When a variety of rated voltages or rated 
voltage ranges are given, one of them shall be 
220V, and shall be set as 220V when 
dispatched from the factory 
- Rated frequency or rated frequency range 
shall be 50Hz or include 50Hz 
- If a unit is not provided with a means of direct 
connection to the a.c. mains supply, it need not 
be marked with any electrical rating 
Class III equipment.  
 
1.7.12 
Plate and warning marking in Chinese: 
Item 1.7.12 of GB4943-2001 stipulates; 
instructions and equipment markings related to 
safety shall be in simplified Chinese  
Must be considered before 
marketing in China. 
 
 
3.2.1 
Power supply plug: 
According to China`s particular standards for 
power supply plug, it is added in article 3.2.1 of 
GB4943-2001 that plug connecting equipment 
with a.c. mains supply shall be in accordance 
with requirements of GB1002 
Class III equipment. 
 
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