Epson SQ-870 Manuals

Manuals and User Guides for Epson SQ-870. We have 1 Epson SQ-870 manual available for free PDF download: Service Manual

Epson SQ-870 Service Manual

Epson SQ-870 Service Manual (176 pages)

Brand: Epson | Category: Printer | Size: 3.26 MB

Table of Contents

Chapter 1 General Description

7
- Table of Contents
  7
- General Description
  7
- Features
  9
  - Optional Units
    10
- Specifications
  11
- Control Panel
  24
- Figure 1-10. Control Panel
  24
- Dip Switches and Jumper Setting
  26
- Operating Instructions
  28
  - Self.test
    28
  - Hexadecimal Dump Function
    28
  - Paper-Out Detection and Forms Override Function
    28
  - Error Conditions
    28
  - Buzzer Operation
    29
  - Printer Initialization
    29
  - Default Values
    30
  - Sheet Loading and Sheet Ejection
    30
  - Tear-Off Function
    31
  - Adjust Lever Operation
    31
  - Figure 1-11 Lever Positions
    31
  - Printhead Protection
    32
  - Ink Charge
    32
  - Ink End Detection
    32
  - Cover Open Detection
    32
- Main Components
  33
Chapter 2 Operation Principles

37
- Operating Principles of Printer Mechanism
  40
- Printhead Mechanism
  41
- Carriage Mechanism
  43
- Paper Feed Mechanism
  45
- Ink Mechanism
  53
  - Pump Motor
    54
  - Pump Mechanism
    55
  - Cap Mechanism
    56
  - Mechanism
    57
  - Ink Cartridge and Ink End Sensor
    59
  - Wasted Ink Drain Tank
    60
  - Operational Sequence of Ink Mechanism
    61
- Case Open Interlock Switch
  65
- Operating Principles of Power Supply Circuitry
  66
- Voltage Allocation
  66
- Control Circuitry Overview
  68
- Operating Principles of Control Circuitry
  68
- Detection Circuit
  70
- Reset Circuit
  70
- Paper Feed Motor Drive Circuit
  71
- Carriage Motor Drive Circuit
  72
- Printhead Drive Circuit
  73
- Pump Motor Drive Circuit
  75
- TE Motor Drive Circuit
  76
- Timer Circuit and Backup Circuit
  76
- EEPROM Control Circuit
  77
  - Disassembly and Assembly
    78
  - Precautions for Disassembling the Printer
    81
  - Housing Removal
    91
  - Printhead Replacement
    92
  - Printer Mechanism Removal
    95
  - Circuit Board Removal
    97
  - Printer Mechanism Disassembly
    100
Chapter 4 Adjustments

116
- Platen Gap Adjustment
  118
- Timing Belt Tension Adjustment
  120
- Printhead Drive Voltage Adjustment
  121
- Print Adjustment
  124
  - Printhead Slant Adjustment
    124
  - Print Position Adjustment
    125
- Volume Vr1 Adjustment on Main Board
  126
  - Troubleshooting
    127
- Figure 1-14. Control Panel
  130
  - Repair by Unit Replacement
    130
  - Preventive Maintenance
    151
  - Lubrication and Adhesive Application
    151
  - C076 Pse Boerd Circuit Diagram
    165

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