Samsung K4578DHV2-VW, K4578DHV2=VY Service Manual

K4578DHV2[VW
K4578DHV2[VY

CONTENTS

1. Exploded Views and Parts List

2. P.C.B Diagrams
3-1. PCB-DIAGRAM
3-2. Circuit Diagrams
3-3. Circuit Diagram of MAIN CONTROL
3-4. Circuit Diagrams of Main Parts

3. Error Mode

4. Symptoms of Errors and Related Parts
List

5. Tools used for assembly and
disassembly

51 S1F1E Gldjudpv

50404 Pdlq SFE0GLDJUDP

PCB Power

Power Relay

Relays

1.Hot Water Supply

2.Main Water Supply

3.Water Supply for Drying

4.Pre-water Supply

5.Door Close

6.Door Open

7.Pump

①

③④⑤⑥

②

⑦

Motor PowerReactor

IPM
motor-driving
micom

Display

Hall sensor

w/v,pump,
door S/W

Drying Relay Power Relay Drying Relay

- 10 -

Main micom

50405 Vxe SFE0GLDJUDP

Course Selection Dial

Washing
Temp. Setup

Silver Wash
Course

Wash
Selection

Number
of Rinse
Setup

Spin Speed
Setup

- 11 -

Delay Start
Setup

5051 Flufxlw Gldjudpv

- 12 -

5061 Flufxlw Gldjudp ri PDLQ FRQWURO

- 13 -

5071 Flufxlw Gldjudpv ri Pdlq Sduwv

1.Power

NO

NC

Power
S/W

COM

Press of Power S/W switches NC to NO and makes Micom start to drive. At this moment, sequential sigals generated from Micom function
to operate Power Relay continuously. One more press of Power S/W switches NC to NO and permits Micom to accept the signal. It will
cut off Power by switching the Relay ON/OFF.

- 14 -