Daewoo DWF-5590DP Series Service Manual page 35

• The Electrolytic condenser C13(3300µF, 10V) and diode D2 is used in order that at instant power supply failure circuit
should remember the contents of the program. It happens that the MICOM terminal No. 16 has instant interruption of
electric power, yet the MICOM is not discharged electricity because of the diode D2.
• The measurement of voltage
EFFECTIVE VALUE
EFFECTIVE VALUE
82.5V
119V
137.5V
165V
220V
275V
3) CAUTION FOR A/S
• Measure the voltage of input terminal REGULATOR I. C. of 7806 with tester. And,
compare the measuring value with the voltage table.
• Check the condenser in case the electrolytic condenser and ceramic condenser
have short circuit. The reason is that it happerns no electric power supply.
INTERRUPT UNIT
1) CIRCUIT DIAGRAM
2) EXPLANATION OF CIRCUIT
The INTERRUPT UNIT is necessary to reduce the generation of surge, by use of being voitage 'ON' from the zero
voltage.
•The waveform of the part !
35
!
!
5.2V
7.2V
9.3V
5.3V
7.6V
9.7V
M
R19,220
I 21
Q17
C
C1959
C10
O
104Z
M
f=60Hz
Vpeak=11.4V
Vrms=8V
@ #
@ #
7.9V 7.9V
11V 11V
14.1V 14.1V
7.6V 7.6V
10.6V 10.6
13.7V 13.7V
R23,3.9K
R64,10K
C35
R65
22K
103Z
•Thewaveform of the part @ (in case of cutting the part of
the dotted line)
0V
$
$
5.97V
5.97V
5.98V
5.96V
5.98V
5.98V
7806
INPUT
GND
D9,1N4003
@
D6,1N4003
%
%
5.4V
5.4V
5.4V
5.4V
5.4V
5.4V
OUTPUT