Epson Stylus Pro XL Service Manual Page 42
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- TROUBLESHOOTING
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2.3.2.1 Reset Circuits
The C162 MAIN Board contains 2 reset circuits: the +5 V monitor reset circuit and the +35 V
monitor reset circuit. The +5 V monitor reset circuit monitors the voltage level of the +5 V line,
using reset IC PST592D (IC12), and outputs a reset signal to the E05A96 gate array (IC2) when the
voltage level drops below +4.2 V. The +35 V monitor reset circuit monitors the voltage level of the
+35 V line, using reset IC M51955B (IC8), and outputs a reset signal to the CPU. The reset signal is
generated when the voltage level drops below +28 V, and this causes a non-maskable interrupt
(NMI).
2.3.2.2 Sensor Circuits
The following sensor circuits enable the C162 MAIN Board to monitor printer mechanism status:
HP sensor The photocoupler-type home position (HP) sensor is attached to the surface of the
printer mechanism to detect the carriage home position. A LOW level from the
signal indicates that the carriage is in home position.
PE sensor The mechanical switch paper end (PE) sensor is built into the printer mechanism to
determine whether there is paper in the printer or not. A LOW level from the signal
indicates that no paper is loaded.
BCO sensor,
CCO sensor
The cartridge out (CO) sensor is micro switch attached to the bottom of each ink
cartridge holder in the carriage unit. When the ink cartridge is installed, these
switches are pressed and a LOW level from the signal indicates that the ink
cartridge is installed into the ink cartridge holder.
Thermistor A thermistor is attached to the color printhead driver board to monitor its
temperature by thermister’s resistance value (at 25°C approx. 10kΩ). The CPU
changes the printhead drive signal’s pulse width (charge pulse width) based on the
temperature level.
+35 V
+5 V
NMI
P62
CPU (IC1)
+5 V
PST592D
(IC13)
E05A96 (IC2)
RES
RESET
135
71
1
6
72
68
M51955B
(IC8)
PA8
RST
Type B
55
Figure 2-18. Reset Circuit Block Diagram
1
2
1
2
3
TH
10
9
+5 V
AN3
89
86
(CN12)
CCO
8
AN5
91
CPU (IC1)
AN1
AN0
HP
PE
+5 V
(CN8)
(CN9)
AN4
8
90
BCO
(CN11)
87
9
Figure 2-19. Sensor Circuit Block Diagram
Operating Principles Stylus Pro XL
2-16 REV.-A
- SERVICE MANUAL 1
- Chapter 1 Product Description 2
- 1.1 FEATURES 4
- Table 1-1. Interface Cards 5
- 1.2 SPECIFICATIONS 6
- Table 1-3. Character Tables 7
- 1.2.3 Paper Specifications 8
- Printable area: Cut sheets 9
- Envelopes 9
- 1-6 Rev.A 9
- Cut Sheets Envelopes 10
- Carriage Unit 10
- : Without condensation 11
- 1.2.7 Reliability 12
- 1.2.8 Safety Approvals 12
- 1.2.9 Physical Specifications 12
- 1.3 INTERFACE SPECIFICATIONS 13
- 1.4 OPERATIONS 16
- Indicators 17
- 1.4.3 Default Settings 18
- 1.4.3.1 Default Setting Items 18
- Table 1-17. Feature Selection 19
- Operate LED Data LED 20
- 1.4.4 Error Conditions 21
- Table 1-19. Error Indications 21
- 1.4.5 Printer Initialization 21
- 1.5 MAIN COMPONENTS 22
- 1.5.5 Housing 24
- Table of Contents 25
- List of Figures 26
- List of Tables 26
- 2.1 OVERVIEW 27
- 2.2.1 Printer Mechanism 28
- Micro Dot Printing mode 30
- CR Motor 31
- CR HP Sensor 31
- Carriage Guide Shaft 31
- Belt Pulley 31
- 2.2.3 Paper Feed Mechanism 32
- Table 2-5. Drive Terms 33
- 2.2.4 Ink System 34
- Drive: Pump Mechanism 35
- Drive: Switch Lever Set 35
- Drive: Paper Feed Mechanism 36
- Switch Lever: Reset 36
- Figure 2-12. Pump Operation 37
- 2.2.7 Wiping Mechanism 38
- 2.3.2.1 Reset Circuits 42
- 2.3.2.2 Sensor Circuits 42
- STROBE pulse 44
- 2-18 REV.-A 44
- Normal Dot Mode 46
- Drive Waveform 46
- Micro Dot Mode 46
- Block Resistor 46
- Micro Dot Printing Mode 47
- 2.3.2.6 DMA Controller 48
- CPU H8 (IC1) DRAM (IC5) 49
- 2.4 INK SYSTEM MANAGEMENT 50
- 2.4.1 Ink Operations 51
- 2.4.2.1 Protect Counter 53
- 3.1 OVERVIEW 56
- ATTENTION 56
- 3-2 REV.-A 57
- DISASSEMBLY/ASSEMBLY POINT 58
- C137 PNL Board 58
- Carriage Lock Lever 58
- CBB (M3x11) 58
- CBS (M3x8) 59
- C162 MAIN Board 59
- CBB (M3x12) 59
- ASSEMBLY POINT 61
- REQUIRED ADJUSTMENT 61
- Ink Cartridge 63
- Fixing Lever 63
- Cartridge Holder 63
- Figure 3-9. Printhead Removal 64
- 3.2.5.2 Carriage Unit Removal 67
- 3.2.5.3 Pump Unit Removal 68
- Cleaner Lever 69
- 3.2.5.5 CR Motor Removal 70
- 3.2.5.6 PF Motor Removal 70
- 3.2.5.8 PE Sensor Removal 71
- Paper Feed Roller 72
- 3.2.5.10 Upper Frame Removal 73
- Chapter 4 Adjustments 74
- 4.1 OVERVIEW 75
- Adjustments Stylus Pro XL 76
- Stylus Pro XL Adjustments 77
- Head Base 79
- Figure 4-5. Spacer Selection 80
- Spacer Name 87
- Thickness 87
- Figure 4-15. Spacer Selection 87
- 4.1.7 Platen Gap Adjustment 90
- Chapter 5 Troubleshooting 92
- Rev.-A 5-i 93
- 5.1 OVERVIEW 94
- Table 5-3. Error Codes 95
- 5.2.2 Error is detected 98
- Stylus Pro XL Troubleshooting 100
- Troubleshooting Stylus Pro XL 101
- Chapter 6 Maintenance 108
- 6.1 PREVENTIVE MAINTENANCE 109
- 6.2 SERVICE MAINTENANCE 110
- 6.3 LUBRICATION AND ADHESIVES 111
- 6-4 Rev.A 112
- Rev.A 6-5 113
- 6-6 Rev.A 114
- Appendix 115
- A.1 CONNECTOR SUMMARY 116
- Table A-1. Connector Summary 117
- Stylus Pro XL Appendix 118
- Appendix Stylus Pro XL 119
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