Daewoo DWF-4230 Series Service Manual page 15

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ELECTRIC POWER SUPPLY UNIT

1) CIRCUIT DIAGRAM

2) EXPLANATION OF CIRCUIT

• The primary voltage of the transformer sets RATING VOLTAGE, the secondary voltage of the transformer is full wave

rectified by use of the D14 (1N4003) & D15 (IN4003)

1 The gray & red (The waveform in secondary part of the

transformer)

f=50Hz or 60Hz

2 Measuring the waveform in case of the removing

condenser by the removal ripple C12.

@ ?

@ ? h e ? O 2 @ @ @ 6 K

? O 2 @ @ @ @ 6 K ?

O 2 @ @ @ 6 K ?

O 2 @ @ @ @ 6 K

? O 2 @ @ @ 6 K

@ ? h W 2 @ @ 0 M ? I 4 @ @ 6 X ?

W 2 @ @ 0 M e I 4 @ @ 6 X

? W 2 @ @ 0 M ? I 4 @ @ 6 X

? W 2 @ @ 0 M ? ? I 4 @ @ 6 X ?

W 2 @ @ 0 M ? I 4 @ @ 6 X ?

@ ? g ? W & ( M ? g I ' ) X

? W & ( M ? g ? I ' ) X ?

W & ( M g ? I ' ) X ?

W & ( M h I ' ) X

? W & ( M ? g I ' ) X

@ ? g W & ( Y h ? V ' ) X ? h f W & ( Y h e V ' ) X h f ? W & ( Y ? h V ' ) X h f ? W & ( Y ? h ? V ' ) X ? h f W & ( Y h ? V ' ) X ?

@ ? f ? W & ( Y ? h e V ' ) X h e ? W & ( Y ? h e ? V ' ) X ? h e W & ( Y h e ? V ' ) X ? h e W & ( Y h f V ' ) X h e ? W & ( Y ? h e V ' ) X

@ ? f W & ( Y h f ? V ' ) X ? h ? 7 ( Y

V ' 1 ? h ? W & ( Y ? h f V ' ) X h e 7 ( Y ? h f ? V ' 1 h e W & ( Y h f ? V ' ) X ?

@ ? f 7 ( Y ?

V ' 1 ? h J @ H ?

? N @ L h ? 7 ( Y

? V ' 1 h ? J @ H

N @ L ? h 7 ( Y ?

V ' 1 ?

@ ? e ? J @ H

? N @ L h 7 5

3 1 h J @ H ?

N @ L ? g ? 7 5 ?

? 3 1 ? g ? J @ H

? N @ L

@ ? e ? 7 5 ?

3 1 g ? J @ H

N @ L ? g 7 5

? 3 1 ? g J @ H ?

? N @ L g ? 7 5 ?

3 1

@ ? e J @ H ?

N @ L ? f ? 7 5 ?

? 3 1 ? f ? J @ H

? N @ L g 7 5

3 1 g J @ H ?

N @ L ? h g ?

@ ? e 7 5

@ ? ? J @ H

? N @ L f 7 5

? 3 1 ? f J @ H ?

? N @ L f ? 7 5 ?

3 1 f J @ H ?

N @ L ? e ? 7 5 ?

3 1 f ? J @ H

N @ L ? f 7 5

? 3 1 ? e ? J @ H

? 3 1 ? h g ?

? N @ L h g ?

@ ? ? 7 5 ?

3 1 e ? J @ H

N @ L ? e 7 5

? 3 1 ? e J @ H ?

? N @ L e ? 7 5 ?

3 1 h g ?

@ ? ? @ H ?

N @ L ? ? 7 5 ?

? 3 1 ? e @ H

? N @ L e 7 5

3 1 e ? @ H ?

N @ h g ?

@ ? J @

? 3 1 ? ? @ H ?

? N @ ? ? J @ ?

3 1 e @ H

N @ e J @

? @ L ? h f ?

@ ? 7 5

? N @ ? ? @

@ ? ? 7 5 ?

N @ e @ ?

? @ e 7 5

? 3 1 ? h f ?

@ ? @ H

@ ? J @

@ L ? @ H ?

? @ ? J @ ?

? @ L ? @ H

? N @ ? h f ?

@ ? @ ?

@ ? @ H

@ ? 7 5

3 1 ? @

N @ ? @

? @ ? @ H ?

? @ ? 7 5 ?

? 3 1 ? @ ?

? N @ ? @ ?

@ ? h f ?

@ L h f ?

@ ? @ ?

3 @ @ ?

? @ @ 5

? 3 @ @

@ @ 5 ?

3 1 h f ?

? W 2 @ 6 X ? @ e ? @ h e @ @ 5 ?

N @ @ ?

? @ @ H

? N @ @

@ @ H ?

N @ h f ?

? 7 < ? B 1 ? @ e ? @ h e @ @ Y ?

? @ @ ?

@ @

? @ h f ?

? @ e ? @ ? 3 L ? J @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ e ?

? @ e ? @ ? N 1 ? 7 < h e @ ?

? @ e ? @ e 3 T 5 ? h e @ ?

? 3 = ? C 5 e N @ H ? h e @ ?

? V 4 @ 0 Y e ? @ h f @ ?

@ ?

3 It is removed the ripple with attaching the C12 (1000µF).

@ ?

@ ? h W 2 @ @ @ @ 6 K

O 2 @ @ @ 6 K ?

W 2 @ @ @ 6 K ?

@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ ?

@ ? g ? O & ( M ? ? I 4 @ @ @ 6 K

W 2 @ 0 M ? I 4 @ @ 6 K

? O & ( M ? I 4 @ @ 6 K

@ ?

@ ? f ? W 2 @ 0 Y g ? I 4 @ @ 6 K ?

? O & ( M ? f ? I 4 @ @ @ 6 K

? O 2 @ 0 Y f ? I 4 @ @ 6 K ?

@ ?

@ ? f O & ( M h f I 4 @ @ @ 6 K ?

? O 2 @ 0 Y h e ? I 4 @ @ @ 6 K

? O 2 @ 0 M h e I 4 @ @ @ 6 K ?

@ ?

@ ? e O 2 @ 0 Y ?

I 4 @ @ @ 6 K ? h f ? O 2 @ 0 M

? I 4 @ @ @ 6 K h f ? O 2 @ 0 M

I 4 @ @ 6 K

@ ?

@ ? W 2 @ 0 M ?

I 4 @ @ 6 K h ? O 2 @ 0 M

? I 4 @ @ 6 K ? g ? O 2 @ 0 M

? I 4 @ @ 6 K ?

@ ?

@ @ 0 Y

@ W & ( M ?

? I 4 @ @ @ 6 K e ? O 2 @ 0 M

? I 4 @ @ @ @ @ 0 M

I 4 @ @ @ 6 K ? ? O 2 @ 0 M

I 4 @ @ @ @ 0 M

I 4 @ @ @ 6 K ?

I 4 @ @ 6 K

@ ?

I 4 0 M

? I 4 @ @ @ @ ?

@ ?

? I @ ?

@ ?

@ ? f ? W & ? ? W 2 @ 6 X ? @ e ? @ h ?

@ ?

@ ? f ? * @ ? ? . M ? B 1 ? @ e ? @ h ?

@ ? f ? N @ ? f J 5 ? 3 L ? J 5 h ?

@ ?

@ ? g @ ? e ? W . Y ? N 1 ? 7 H h ?

@ ?

@ ? g @ ? e W . Y ? e 3 T 5 ? h ?

@ ?

@ ? g @ ? ? W & Y f N @ H ? h ?

@ ?

@ ? g @ ? ? & @ @ @ @ e ? @ h e ?

@ ?

@ @ @ @ @ @

@ ?

@ @ @ @ @ H

@ ?

3 @ @ @ @ ?

@ ?

N @ @ @ 5 ?

@ ?

? @ @ @ H ?

@ ?

? N @ 5

? 3 @ @

@ ?

@ Y

@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ h f ?

@ ?

4 The waveform of output in the REGULATOR I.C. 7806.

5 The waveform after passing the D10.

? @

@ @ @ @ @ ? e ? W & ? ? @ e ? @ e ? @

@ ? g W & @ ? ? @ e ? @ e ? @

@ @ @ 6 X ? ? W . Y @ ? ? 3 L ? J 5 e ? @

? B 1 ? ? 7 Y ? @ L ? N 1 ? 7 H e ? @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ ? ?

@ ? ? @ @ @ @ @ e 3 T 5 ? e ? @

/ K ? C 5 ? f @ H e N @ H ? e ? @

V 4 @ 0 Y ? @ ? e @ ? e ? @ f ? @

? @

W 2 @ 6 X ? @ ? e @ ? h ? @

7 < ? B 1 ? @ ? e @ ? h ? @

@ ? e @ ? 3 L ? J @ = h ? @

@ ? e @ ? N 1 ? 7 R 4 @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ ? ?

3 = ? C 5 ? ? N @ H h e ? @

@ ? e @ ? ? 3 T 5 h e ? @

V 4 @ 0 Y ? e @ ? h e ? @

? @

• The Electrolytic condenser C6 (470µF, 16V) and diode D10 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. 42 has instant interruption of

electric power, yet the MICOM is not discharged electricity because of the diode D10.

• The measurement of voltage

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 voltage 'ON' from the zero voltage.

• The waveform of the part 1

EFFECTIVE VALUE

5.2V

7.9V

7.2V

11V

9.3V

14.1V

5.3V

7.6V

10.6V

10.6

9.7V

13.7V

• Thewaveform of the part 2 (in case of cutting the part of

the dotted line)

f=50Hz or 60Hz

? 7 < ? B 1 ? @ e ? @ h e @ @

? W 2 @ 6 X ? @ e ? @ h e @ @ H ?

? @ e ? @ ? N 1 ? 7 < h e @ ?

? @ e ? @ e 3 T 5 ? h e @ ?

? 3 = ? C 5 e N @ H ? h e @ ?

? V 4 @ 0 Y e ? @ h f @ ?

4 $

5.97V

5.4V

5.97V

5.4V

5.98V

5.4V

5.96V

5.4V

5.98V

5.4V

5.98V

5.4V

@ ?

@ ? g ? W 2 @ @ 0 M ? I 4 @ 6 X ?

@ ? h e O 2 @ @ @ 6 K ?

? W 2 @ 0 M e I 4 @ 6 X ?

? O 2 @ @ @ @ 6 K ?

? @ @ @ 0 M ? I 4 @ @ 6 X ?

? O 2 @ @ @ 6 K

W 2 @ @ 0 M ? I 4 @ @ 6 X ?

? O 2 @ @ @ 6 K

W 2 @ @ 0 M ? I 4 @ @ 6 X ?

? O 2 @ @ @ 6 K

@ ? g W & ( M g I ' ) X

W & ( M g I ' ) X

J @ h I ' ) X

7 ( M ? g I ' ) X h f ? W & ( M ? g I ' 1 ?

@ ? f ? W & ( Y ? g ? V ' ) X ? h e ? W & ( Y ? g ? V ' ) X ? h e ? W & 5 h ? V ' ) X ? h e ? J @ H h ? V ' ) X ? h e W & ( Y h ? N @ L

@ ? f W & ( Y h e V ' ) X h e W & ( Y h e V ' ) X h e W & ( Y h e V ' ) X h e W & 5 ? h e V ' 1 ? h e 7 ( Y ? h e 3 ) X ?

@ ? f 7 ( Y ? h e ? V ' ) X ? g ? W & ( Y ? h e ? V ' ) X ? g ? W & ( Y ? h e ? V ' 1 h ? W & ( Y ? h e ? N @ L h ? J @ H h f V ' ) X

@ ? e ? J @ H

V ' 1 ? g ? 7 ( Y

N @ L ? g ? 7 ( Y

3 ) X ? g W & 5 ? h f ? V ' 1

@ ? e ? 7 5 ?

@ ? e J @ H ?

? N @ L g ? @ H ?

3 1 g J @

? N @ ? g J @ H ?

@ L g 7 5

? 3 1 ? g J @ H ?

? N @ L g 7 5

V ' 1 ? g 7 ( Y ?

? N @ ? g @ H

N @ L ?

? 3 1 ?

@ ? e 7 5

N @ g 7 5

3 1 g @ H

3 1 f ? J @ H

@ L f ? J @ ?

? N @ L

@ ? e @ H

? @ L ? e ? J @ H

N @ L ? e ? J @ ?

N @ L ? e ? 7 5 ?

3 1 f ? 7 5 ?

3 1

@ ? ? J @ ?

? 3 1 ? e ? 7 5 ?

? 3 1 ? e J @ H ?

N @ L ? e J @ H ?

N @

@ ? ? 7 5 ?

? N @ L e J @ H ?

? N @ ? e 7 5

? 3 1 ? e 7 5

? @ L ?

@ ? J @ H ?

@ ? 7 5

N @ e @ H

3 1 e 7 5

N @ e @ H

@ L e @ H

3 1 e @ ?

? N @ ? e @ H

@ L ? J @ ?

? 3 1 ?

? N @ ?

@ ? @ H

? @ e @ ?

N @ ? J @ ?

3 1 ? 7 5 ?

@ L

@ ? @ ?

? @ L ? @ ?

? @ ? J @ ?

? @ ? 7 5 ?

N @ ? @ H ?

3 1

@ ? @ ?

? 3 ) X @ ?

? @ W & 5 ?

? @ ? @ H ?

? @ ? @

N @

@ ? @ ?

? N @ @ 5 ?

? 3 @ @ H ?

? @ ? @

? @

@ @ 5 ?

@ @ H ?

? N @ @

? 3 @ @

? @ ? @

? @

@ @

? N @ @

@ @

? V @ Y

? 3 @ 5

? @ L ?

? @ ) K

@ ?

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