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Fault tracing diagram
Attention! A short circuiut Transistor
Mains stage does
not start up
T 634 can be result of defective
D 681, D 682
no
Before changing a component in
the primary mains stage it is im-
perative, that C 626 is discharged
by a resistor of approx. 100 Ohm.
Check D 621,C 626,|
yes
C 6001, T 634
Fuse
S 6001 defektive
for short circuit
yes
IC 6100, T 6140,
R 610, R 620,
D 637, R 637,
IC 6100
Start-up voltage
Cont.. 13
=0,5V
T 6124, T 6130,
OK 6131
yes
no
tart-up
voit. Cont. 13
varies, no
yes
Pin 5, 1C 6100
<2,1V
no
Start-up
volt. Cont. 13
varies, Osz. (2)
pulse
D 634, D 647, Si 644
{C 6100, T 634
disconnected
IC 6100, IC 6170,
IC 6150, T 6100,
T 6105
no
OK 6160, IC 6166,
Start-up v.
R 611, R 612,
> 11,5V;
+A Spg.
R 613, IC 6100
not adjustasble,
IC 6150, IC 6170,
T 6110, OK 6110
11,5V; frequency Pin 2
Contr. range of switched
mode power supply
Circ. 190-264V
13
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