Epson Stylus Photo 750 Specifications download pdf (Page 38)

EPSON Stylus Photo 750 Revision A

Operating Principles Operating Principles of Electric Circuit 33

2.2.2.2 Reset Circuit

Reset circuit consists of reset/timer IC(IC8) and peripheral elements.

The reset/timer IC prevents the CPU from running away, which is

caused by the unstable voltage(+5VDC line voltage is less than +4.3V)

in the logic line during the power ON/OFF operation. Also, IC sends the

reset signal to the CPU and gate array when +42VDC line voltage is

less than +35.5V.

Figure 2-5. Reset Circuit

/NMI

MRES

/RESET

IC 1

C90A05

/RES

+42 VIN

VDD

VBK

GND

/VDT

FRST

/RST

SCLK

DATA

IC 8

RTC-9810

IC 2

E05B588

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 113 114

6(59,&(#0$18$/ 1
PRECAUTIONS 3
About This Manual 4
Revision Status 5
Product Description 6
Operating Principles 6
Troubleshooting 6
Disassembly and Assembly 6
Adjustment 6
Maintenance 7
Appendix 7
PRODUCT DESCRIPTION 8
1.1 Overview 9
1.2 General Description 10
1.2.2 Paper Feeding 11
1.2.3 Paper Specification 11
1.2.4 Printable Area 12
1.2.5 Adjust Lever Settings 13
G uranteed R ange 14
1.2.7 Ink Cartridge 15
1.2.8 Input Data Buffer 16
1.2.9 Electric Specification 16
1.2.10 Reliability 16
1.2.11 Safety Approvals 16
1.2.12 Acoustic noise 16
1.2.13 CE Marking 17
1.3 Parallel Interface 19
/S T R B 22
1.3.3 Serial Interface 23
1.3.6 Interface selection 25
1.3.7 IEEE 1284.4 protocol 25
1.4 Function 26
1.4.4 Special Setting Mode 27
1.4.5 LED Indications 27
1.4.6 Errors 28
1.4.7 Initialization 29
1.4.8 Initialization Setting 30
1.4.9 Physical Specification 30
Table 1-20. Consumables 31
OPERATING PRINCIPLES 32
2.1 Overview 33
TRANS(T1) 36
2.2.2.1 Major Elements 37
2.2.2.2 Reset Circuit 38
E05B58** 40
TROUBLESHOOTING 43
3.1 Overview 44
Troubleshooting Overview 40 45
Is th e 46
2. Error is detected 47
Figure 3-3. Flowchart 2 47
Figure 3-4. Flowchart 3 47
Figure 3-5. Flowchart 4 48
5. Abnormal Control Panel 48
Figure 3-6. Flowchart 5 48
DISASSEMBLY AND ASSEMBLY 55
4.1 Overview 56
4.1.3 Work Completion Check 57
4.2 Disassembly 58
4.2.1 Housing Removal 59
4.2.2 Circuit Boards Removal 60
ADJUSTM ENT 61
REQUIRED 61
4.2.3 Control Panel Removal 62
4.2.5.1 Print Head Removal 64
C leaner, H ead 67
Pum p C om ponents 67
Assem bly O rder 67
Motor, Assembly, PF 69
(behind the fram e) 69
[C B S w ith w a s h e r] 70
G ear, 34 70
BUSH, FIXING, SHAFT, LEFT 71
LEVER, HO PPER, RELEASE 71
BUSH, FIXING, SHAFT 71
BUSH, PARALLEL ADJUST, RIGHT 73
Side fram e of 73
PAPER G UIDE, LEFT 76
SHAFT, PAPER G UIDE, UPPER 76
ROLLER, ASSEM BLY, PF 77
4.2.5.11 HP Sensor Removal 78
ADJUSTMENT 81
5.1 Overview 82
5.2 Adjustment 83
Adjustment Adjustment 79 84
5.3.1 Adjustment Program 85
6. Select “World” 86
Prom pt-SP750 87
Adjustm ent Lever 90
5.3.5 Bi-D Adjustment 91
5.3.6 Head Cleaning 92
5.3.7 Initial Ink Charge 93
MAINTENANCE 95
6.1 Overview 96
6.1.3 Lubrication 97
Maintenance Overview 93 98
Maintenance Overview 94 99
Maintenance Overview 95 100
APPENDIX 101
7.1 Connector Summary 102
Appendix Connector Summary 98 103
Appendix Connector Summary 99 104
7.2 Component Layout 105
Appendix Component Layout 101 106
7.3 Exploded Diagram 107
Appendix Exploded Diagram 103 108
Appendix Exploded Diagram 104 109
7.4 Electric Circuit 110

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Epson Stylus Photo 750 Specifications Page 38

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