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Page 26 of 54 

Report No.: 1009940 

Clause 

Requirement + Test 

Result - Remark 

Verdict 

 

 
TRF No. IEC60065J 

 
 

No 

Component 

Fault 

Temp Rise/ 

Component 

Other results 
(include description and test duration) 

1 

Speaker out 

max output 

(<100%) 

56K/Mains transf. 
(windings max) 
26K/Rear panel 
(metallic) 
26K/PCB 
24K/heat sink, on 
rear panel 

Test Voltage=253V, In=0.6A, Pn=110W 
Uout=15.5V (limited by the amplifier) 

4h. No hazard. 

2 Q105  sc 

--  Test 

voltage=198V 

F501 blew immediately. No hazard. 

3 Q107  sc 

--  Test 

voltage=198V 

F501 blew immediately. No hazard. 

4 C133  sc 

--  Test 

voltage=198V 

F501blew immediately. No hazard. 

5a C122  sc 

--  Test 

voltage=253V 

F501 blew immediately. No hazard. 

5b C122  sc 

--  Test 

voltage=198V, Pin=450→260W, 

Iin=2.3→1.5A 
Printed conductor on PCB were 
interrupted. When the conductor were 
bridged the thermal link in the transformer 
interrupted after 3.5min. No hazard. 

6 

D115 (~ - +) 

sc 

-- 

Test voltage=198V 
F501 blew immediately. No hazard. 

7 

D110 (~ - +) 

sc 

-- 

Test voltage=198V 
F501 blew immediately. No hazard. 

8 C117  sc 

--  Test 

voltage=198V 

P

mains

 decreased to 8W. No hazard. 

9 

C10 

sc 

TR1 winding / 67K  Un=253V, Pn = 5.5W, In = 0.065A    

Relay switched OFF. No hazard   

 

Page 27 of 54 

Report No.: 1009940 

Clause 

Requirement + Test 

Result - Remark 

Verdict 

 

 
TRF No. IEC60065J 

 

10 

D2 

d 

- 

Un=253V, Pn = 0.3W                         
Protection mode immediately.                   
No hazard   

11 

D2 

sc 

- 

Un=253V, Pn = 45W                         
Normal function. No hazard   

12 

D6 

d 

- 

Un=253V, Pn = 47W                         
Normal function. No hazard   

13 

 IC1          

(5-8) 

sc 

- 

Un=253V, Pn = 0W,                           
Mains fuse blowed immediately;       
Optocoupler op1 intact. No hazard  

14 

IC1 

(5-8) 

sc - 

Un=198V, Pn = 0W,                           
Mains fuse in Standby PCB blowed 
immediately; Optocoupler op1 intact.  
No hazard 

 
 

 

Winding temperature rise measurements 

 

 

Ambient temperature t1 (

o

C) .................................. : 

22 

— 

 

Ambient temperature t2 (

o

C) .................................. : 

22 

— 

 

 

Page 28 of 54 

Report No.: 1009940 

Clause 

Requirement + Test 

Result - Remark 

Verdict 

 

 
TRF No. IEC60065J 

 

Rated supply 
voltage: 

220-230V 

Pollution degree  

2      

Material Group 

IIIa  

or 

 IIIb 

2 N force on internal parts applied: 

Checked 

30 N force on outside of conductive enclosure applied: 

Checked 

 
Location 

 

Operating Voltage 

 

Clearance (mm) 

 

Creepage (mm) 

 

 

V rms 

 

V peak 

 

Min 

 

Actual 

 

Min 

 

Actual 

 

Circuits conductively connected to the mains (use Tables 8, 9 and 11): see note below. 

 

Primary (ac) to Earth (B) 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

 

Primary (+dc) to Earth max (B) 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

 

Primary (-dc) to Earth max (B) 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

 

Across mains fuse (B) 

 

230 

 

345 

 

2.0 

 

8.2 

 

2.3 

 

8.2 

Across primary directly connected 
to the mains (B) 

 

230 

 

345 

 

2.0 

 

7.0 

 

2.3 

 

7.0 

 

Hazardous live secondary to Earth 
(B) 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

Optocoupler op1 input to output   
(R)  

 

230 

 

380 

 

4.0 

 

7.2 

 

4.6 

 

7.2 

Optocoupler input to output (R) 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

Primary to Secondary (R) in 
transformer. 

 

296 

 

418 

 

4.0 

 

8.1 

 

6.3 

 

8.1 

Primary to Iron core, accessible, 
(R) in transformer. 

 

263 

 

372 

 

4.0 

 

6.9 

 

5.4 

 

6.9 

Primary to Secondary in 
transformer TR1. (R)   

 

230 

 

570 

 

4.5 

 

>10 

 

4.6 

 

>10 

Primary to Secondary on Stand-by 
SMPS PCB. (R)   

 

230 

 

326 

 

4.0 

 

6.0 

 

4.6 

 

6.2 

 

Page 29 of 54 

Report No.: 1009940 

Clause 

Requirement + Test 

Result - Remark 

Verdict 

 

 
TRF No. IEC60065J 

 

Primary to accessible conductive 
parts (R) at mains switch. 

 

263 

 

372 

 

4.0 

 

11 

 

5.4 

 

11 

Hazardous live secondary to non-
hazardous live secondary (R) 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

Hazardous live secondary to 
unearthed conductive enclosure 
(R) 

    

 

 

 *) 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

 

-- 

 

Notes: 
1. Secondary circuits of Class II apparatus which have connector terminals that could be earthed (e.g. 
antenna signal input), are subjected to the requirements for circuits conductively connected to the mains in 
Tables 8 and 9. 
2. Floating secondary circuits of Class I apparatus which have connector terminals that could be earthed 
(e.g. antenna signal input), are subjected to the requirements for circuits conductively connected to the 
mains in Tables 8 and 9 unless the floating secondary circuit is separated from the primary circuits by an 
earthed metal screen (e.g. in the power transformer), or the floating secondary circuit is connected to earth 
via a component such as a capacitor. 
3. For insufficient clearances and creepage distances from secondary to secondary circuits and from 
secondary circuits to earth, see Cl. 4.3.1, 4.3.2 and 11.2. 
4. If the minimum creepage distance in Table 11 is less than the minimum required clearance in Tables 8, 9 
or 10 as required, then the value for clearance is used as the minimum creepage distance . 
"Min" = minimum required. 
"Actual = Actual dimensions measured. 

*) Distances insufficient but short circuit does not cause any shock hazard.