Daewoo DR-4700P manuals

Daewoo DR-4700P Service Manual (114 pages)

Brand: Daewoo | Category: Print & Scan | Size: 4.19 MB |

English

Table of contents

SERVICE MANUAL

1

FACSIMILE

1

FO-2970M

1

CONTENTS

2

[1] Specifications

3

[2] Operation panel

4

Printer PWB

5

3. IC protectors replacement

7

4. Settings

7

(1) Dial mode selector

7

Control PWB (Bottom side)

7

MEMORY CLEAR?

8

YES: START

8

2-1. Fax diagnosis

9

FO-2970MU

10

2-2. Print diagnosis

10

4. Soft switch description

14

• Soft switch

14

[3] Troubleshooting

31

[4] Error code table

32

Super G3 mode

33

2. Service call error massage

33

[1] Block diagram

34

[2] Wiring diagram

35

[1] Circuit description

37

1. General description

38

2. Description of each block

38

(1) Main control block

38

(2) Panel control block

42

• Operation panel LCD display

42

T (x 10ms)

51

Heater ON/OFF Control

51

Inputting thermistor values

51

(4) MODEM control block

54

SW PWB

57

Receiving

58

(Example: Fax signal send)

59

1. Block diagram

60

2. Description of blocks

60

(2) Waveforms

60

Gate Array block 2/9

62

Memory block 3/9

63

Reading block 4/9

64

Modem block 5/9

65

Analog block 6/9

66

Reset/Driver block 7/9

67

Other block 8/9

68

Connector block 9/9

69

[3] Printer PWB circuit 1/2

75

Printer PWB circuit 2/2

76

Printer PWB parts layout

77

Power supply PWB parts layout

79

PARTS GUIDE

81

Drive unit

86

I n d e x

108

© 2000 BY SHARP CORPORATION

114

Daewoo devices