HK 3770 (serv.man2) - Harman Kardon Audio EMC - CB Certificate (repair manual). Page 7

     

Page 3 of 51

Report No 248607.

 

 

TRF No. IEC60065K 

List of Attachments (including a total number of pages in each attachment):  
 
Attachment 1:    Schematic Diagram - Major part only (2 pages) 
Attachment 2:    Transformer Information (12 pages) 
Attachment 3:  Photos (4 pages) 
Attachment 4:  European group differences (15 pages) 
Attachment 5:    National deviations for Singapore (5 pages) 
 

Instructions 
(Clause 5.4)  

Instructions/user’s manual is in English. 
The information shall also be given in a language  
acceptable to the country where the apparatus in  
intended to be sold. 

Input / Temperature rise measure ments 
(Clause 7.1) 

The apparatus has three modes in supplying voltage
from TF93 transformer for amplifier circuit. The one 
is “HIGH mode” of 53 V, and the two is “MID mode” 
of 46 V, and the three is “LOW mode” of 30 V, which
is controlled by the IC1400 thermal sensor IC on 
main heat-sink in amplifier board. 
The apparatus is always be started from “HIGH 
mode” first, and then changed to “MID mode” or 
“LOW mode” electrically by operation of the IC1400 
thermal sensor IC when the temperature of the main 
heat-sink is exceeding 65 ºC (for MID mode) or  
85 ºC (for LOW mode). 
The apparatus is equipped with cooling fan on main 
heat-sink and this fan is also operated by IC1400 
thermal sensor IC. 
The fan is operated at slow speed mode and high 
speed mode when temperature of the main heat-
sink is reached 65 ºC and 75 ºC respectively. 
The IC1400 thermal sensor IC is UL approved 
component according to UL60730-1 and accepted 
this component in their position due to comparison 
with similar standard IEC60730-1 where there is no 
different requirements. 
However, please note that the certificate may be 
waived by other agency. 

Plug / External flexible cords 
(Clause 15 and 16) 

This test report does not cover the mains cord set  
except for listed type in list of critical components. 
Must be supplied with an approved cord set suitable 
for the countries where the requirement will be sold. 

Tests performed (name of test and test clause):
 
5    Marking and instructions 
7    Heating under normal operating conditions 
8    Constructional requirements with regard to the 
      protection against electric shock 
9    Electric shock hazard under normal operating 
      conditions 
10  Insulation requirements 
11  Fault conditions 
12  Mechanical strength 
13  Clearances and creepage distances 
17  Electrical connections and mechanical fixings 

Testing location: 
 
Refer to page 2.