Daewoo DWF-5590DP Series, Service Manual

Page: 35 / 63

• 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
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.
35
EFFECTIVE VALUE
@ # $ %
!
82.5V 5.2V 7.9V 7.9V 5.97V 5.4V
119V 7.2V 11V 11V 5.97V 5.4V
137.5V 9.3V 14.1V 14.1V 5.98V 5.4V
165V 5.3V 7.6V 7.6V 5.96V 5.4V
220V 7.6V 10.6V 10.6 5.98V 5.4V
275V 9.7V 13.7V 13.7V 5.98V 5.4V
7806
INPUT
GND
OUTPUT
M
I
C
O
M
R19,220
R64,10K 21
R23,3.9K
Q17
C1959
C10
104Z
C35
103Z
R65
22K
D9,1N4003
D6,1N4003
@
• The waveform of the part
!
• Thewaveform of the part
@
(in case of cutting the part of
the dotted line)
f=60Hz
Vpeak=11.4V
Vrms=8V
0V
EFFECTIVE VALUE
@ # $ %
!