Daewoo DWF-1095 E Series Manual page 21

ELECTRIC POWER SUPPLY UNIT
1. CIRCUIT DIAGRAM
2. EXPLANATION OF CIRCUIT
• The primary voltage of the transformer sets 220V, the secondary voltage of the transformer is full
wave rectified by use of the D7 (1N4003) & D8(1N4003).
1 The gray & red (The waveform in
secondary part of the transformer)
f=60Hz
Vpeak=11.4V
Vrms=8V
2 Measuring the wave form in case of the
removing condenser by the removal ripple
C33
3 It is removed the ripple with attaching the
C33(2200µF).
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4 The waveform of output in the
REGULATOR I.C 7806.
5 The waveform after passing the D2.
12V
• 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 is as follows.
1 EFFECTIVE VALUE
2
165V 5.3V 7.6V
220V 7.6V 10.6V
275V 9.7V 13.7V
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 condendser in case the electrolytic condenser and
ceramic condenser have short circuit. The reason is that it happens
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 voltage 'ON' from
the zero voltage.
• The waveform of the part 1
3 4 5
7.6V 5.96V 5.4V
10.6V 5.98V 5.4V
13.7V 5.98V 5.4V
• The waveform of the part 2 (in case of cutting
the part of the dotted line)
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