DOWNLOAD Harman Kardon AVR 155 (serv.man2) Service Manual ↓ Size: 1.68 MB | Pages: 57 in PDF or view online for FREE

Model
AVR 155 (serv.man2)
Pages
57
Size
1.68 MB
Type
PDF
Document
EMC - CB Certificate
Brand
Device
Audio
File
avr-155-sm2.pdf
Date
PREV: Harman Kardon AVR 155 Service Manual

Harman Kardon AVR 155 (serv.man2) EMC - CB Certificate ▷ View online

 
 
- 
Page 35 of 43 -
 
 
 
 
 
 Report 
No. 
97240 
 
 
Measured at 1/8 of maximum non-clipped output; 
Monitored point: 
 
 
 
dT (K) at  
242V, 60Hz 
Limit dT (K) 
Main transformer core
 
   54,6 
95 
Sub transformer core
 
   27,1 
85 
D991 heat-sink 
   62,2 
- 
PWB near D991 
   65,9 
95 
D992 heat-sink 
   47,0 
- 
PWB near D992 
   45,4 
95 
Q657 body 
   71,4 
- 
PWB near Q657 
   55,2 
95 
C909 capacitor body 
   21,6 
85
°C 
Main heat-sink 
   62,2 
- 
C941 capacitor body 
   28,8 
85
°C 
IC91 body 
   67,1 
- 
PWB near IC91 
   57,6 
95 
Power cord bushing 
   19,6 
60 
Top cover above main transformer 
 
 
 
25,7 
40 
Top cover above main heat-sink 
 
 
 
41,4 
65 *) 
Power switch button (non-metallic) 
 
 
 
2,5 
50 
Front panel (surface, 
Aluminium
) 
   12,2 
60 
 
 
 
 
 
 
*)   Directly covering part for main heat-sink. The top cover is supplied with ventilation openings covering 
 
most of the top cover. This indicates emission of heat from internal parts and the opening area is 
 
therefore not likely to be touched during normal use. 
 
         
 
Winding temperature rise 
measurements 
 
 
 
242V,  
60Hz 
— 
         
 
Ambient temperature t1 (
o
C) : 
   
22,6 
— 
         
 
Ambient temperature t2 (
o
C) : 
   
27,1 
— 
Temperature rise dT of winding: 
R
1
 (Ω) 
R
2
 (Ω) 
dT (K) 
Limit dT (K)  Insulation 
class 
Main transf. primary winding (242V, 60Hz)
3,13 4,12 76,8  95  B 
Sub transf. primary winding (242V, 60Hz) 
4527 5232 35,5  85 
E 
 
 
 
 
 
 
 
 
- 
Page 36 of 43 -
 
 
 
 
 
 Report 
No. 
97240 
 
 
7.2 
TABLE: softening temperature of thermoplastics 
N/A 
Temperature T of part 
T - normal con-
ditions (
o
C) 
T - fault condi-
tions (
o
C) 
T softening 
(
o
C) 
         
 
         
         
 
         
         
 
         
         
 
         
         
 
         
         
 
         
 
10.3 
TABLE: insulation resistance measurements 
P 
Insulation resistance R between: 
R (MΩ) 
Required R (MΩ) 
Between mains poles (primary fuse disconnected) 
> 100 
2 
Between parts separated by double or reinforced insulation
> 100 
4 
 
 
 
 
10.3 
TABLE: electric strength measurements 
P 
Test voltage applied between: 
Test voltage (V) 
Breakdown 
Mains poles (primary fuse disconnected) 
1500Vac No 
Between parts separated by double or reinforced insulation
3000Vac No 
 
 
 
 
 
- 
Page 37 of 43 -
 
 
 
 
 
 Report 
No. 
97240 
 
 
11.2 
TABLE: summary of fault condition tests 
         
P 
         
 
Voltage (V) 0,9 or 1,1 times rated voltage  ......... :
253V or 198V  
— 
         
 
Ambient temperature (
o
C)  ................................... :
23 - 26
 o
C 
— 
Monitored point: 
Under fault conditions specified below 
dT (K)
 
dT (K) 
#) 
*), D114 (A to C), S-c;  
Unit shut down after 4 min. Input current stabilised at 0,008A.  
R104 opened. No hazard (Tested time: 10 min). 
N/A N/A 
*), D117 (A to C), S-c;  
Unit shut down after 10 min. Input current stabilised at 0,008A.  
R105 opened. No hazard (Tested time: 11 min). 
N/A N/A 
*), D104 (A to C), S-c;  
Unit shut down after 11 min. Input current stabilised at 0,008A.  
R106 opened. No hazard (Tested time: 15 min). 
N/A N/A 
**), D104 (A to C), S-c;  
Normal operated. Input current stabilised at 1,31A.  
Main transformer primary winding temperature stabilised. 
No hazard (Tested time: 1 hr 35 min). 
Main transf. 
73,5 
Main transf.
150 
*), C131, S-c;  
Output signal off immediately. Input current stabilised at 0,54A.  
D124, D125, R106 and R107 damaged. No hazard (Tested time: 30 min). 
N/A N/A 
*), C117, S-c;  
Unit shut down after 10 min. Input current stabilised at 0,008A.  
No component damaged. No hazard (Tested time: 15 min). 
N/A N/A 
*), C119, S-c;  
FL display off immediately. Input current stabilised at 1,38A. 
Main transformer primary winding temperature stabilised.  
Q104 damaged. No hazard (Tested time: 1 hr 50 min). 
Main transf. 
87,8 
Main transf.
150 
*), C941, S-c;  
FL display off immediately. Input current stabilised at 1,34A.  
D104, D105, R106 and R107 damaged. No hazard (Tested time: 30 min). 
N/A N/A 
*), C929, S-c;  
Output signal off immediately. Input current stabilised at 0,37A.  
R104 and R105 opened. No hazard (Tested time: 30 min). 
N/A N/A 
*), D991 (AC to +), S-c; 
F901 opened. Input current stabilised at 0,008A. 
No hazard (Tested time: 10 min). 
N/A N/A 
**), D991 (AC to +), S-c;  
Unit shut down immediately. Input current stabilised at 0,008A. 
No component damaged. No hazard (Tested time: 10 min). 
N/A N/A 
*) Tested voltage 253V               **) Tested voltage 198V 
#) Temperature rise limits for Singapore is 10K less 
F No = Fault Number, S-c = Short-circuit, Dis = Disconnection, O-I = Over Loaded 
 
 
- 
Page 38 of 43 -
 
 
 
 
 
 Report 
No. 
97240 
 
 
Monitored point: 
Under fault conditions specified below - continued 
dT (K)
 
dT (K) 
#) 
*), D992 (AC to +), S-c; 
F901 opened. Input current stabilised at 0,008A. 
No hazard (Tested time: 10 min). 
N/A N/A 
**), D992 (AC to +), S-c; 
Unit shut down immediately. Input current stabilised at 0,005A. 
No component damaged. No hazard (Tested time: 10 min). 
N/A N/A 
*), C902, S-c;  
Unit shut down immediately. Input current stabilised at 0,008A. 
No component damaged. No hazard (Tested time: 10 min). 
N/A N/A 
**), C902, S-c;  
Unit shut down immediately. Input current stabilised at 0,005A. 
No component damaged. No hazard (Tested time: 10 min). 
N/A N/A 
*), C916, S-c;  
Unit shut down immediately. Input current stabilised at 0,007A. 
No component damaged. No hazard (Tested time: 10 min). 
N/A N/A 
**), C916, S-c;  
Unit shut down immediately. Input current stabilised at 0,005A. 
No component damaged. No hazard (Tested time: 10 min). 
N/A N/A 
*), D901 (A to C), S-c;  
Normal operated. Input current stabilised at 1,30A.  
Dielectric strength test O.K. No hazard (Tested time: 1 hr 54 min). 
Sub transf. 
73,3 
Sub transf.
150 
*), C906, S-c;  
Unit shut down immediately. Input current stabilised at 0,014A. 
Sub transformer primary winding temperature stabilised. 
Dielectric strength test O.K. No hazard (Tested time: 1 hr). 
Sub transf. 
72,5 
Sub transf.
150 
*), C631, S-c;  
Center output signal off immediately. Input current stabilised at 1,26A. 
R631 opened. No hazard (Tested time: 30 min). 
N/A N/A 
*), Q657 (E to C), S-c;  
Unit shut down immediately. Input current stabilised at 0,008A. 
Q661 and R656 damaged. No hazard. (Tested time: 10 min). 
N/A N/A 
*), Q657 (B to C), S-c;  
Unit shut down immediately. Input current stabilised at 0,008A. 
No component damaged. No hazard. (Tested time: 10 min). 
N/A N/A 
*), Q661 (E to C), S-c;  
Unit shut down immediately. Input current stabilised at 0,008A. 
R656 opened. No hazard. (Tested time: 10 min). 
N/A N/A 
*), Q661 (B to C), S-c;  
Unit shut down immediately. Input current stabilised at 0,008A. 
No component damaged. No hazard. (Tested time: 10 min). 
N/A N/A 
*)  Tested voltage 253V               **)  Tested voltage 198V
 
#) Temperature rise limits for Singapore is 10K less 
F No = Fault Number, S-c = Short-circuit, Dis = Disconnection, O-I = Over Loaded
 
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