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Craden Peripherals
DP8
- page 59
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Contents
Main
CRADEN
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ASCII Meaning ASCII Meaning
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4.0 THEORY OF OPERATION 4.1 OVERVIEW
4.1.1 Carriage Drive Assembly
4.1.2 Document Drive Assembly
4.1.3 Switching Power Supply
4.1.4 Main Printed Circuit Board
4.1.5 Keypad/Display Assembly
4.2 ELECTRONICS IN DETAIL - Refer to #72135 Schematic 4.2.1 Low Voltage Supplies
4.2.2 Microprocessor System
4.2.3 Stepper Motor Drivers
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Current Control
Fig. 4.1 Stepper Motor Drive Circuit
4.2.4 Printhead Drivers
4.2.5 Keypad and Display (Refer to Schematic #72135)
4.2.6 Sensors
4.2.7 Character Printing
Fig. 4.2 Printhead Drive Circuit
U5
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C O I L U13 Timer
5.0 MAINTENANCE 5.1 LUBRICATION AND CLEANING 5.1.1 Lubrication
5.1.2 Document Feed Roller Cleaning
5.1.3 Sensor Cleaning
5.1.4 Printhead Cleaning
5.1.5 Document Print Area Cleaning
5.1.6 Cabinet Exterior Cleaning
5.2 SERVICE PARAMETER SET-UP PROCEDURE
5.3 ELECTRICAL ADJUSTMENTS
5.4 MECHANICAL ADJUSTMENTS 5.4.1 Printhead Gap
5.4.1.1 Ribbon Shield Removal / Replacement
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5.4.1.1.1 Ribbon Shield Face Inspection
5.4.2 Carriage Drive Belt Tension
5.4.3 Document Drive Belt Tension
5.4.4 Carriage Shaft Cam and Shaft Rack
5.4.5 Rear Document Roller Spring Force
5.4.6 Auto Alignment Gate Ramp
5.4.7 Auto Alignment Gate Height
5.4.8 Front Document Roller Spring Force
5.4.9 Auto Alignment Skew Sensor Calibration
5.5 REPLACEMENT PROCEDURES 5.5.1 Cabinet
5.5.2 Main PCB
5.5.3 Sensor PCB
5.5.4 Keypad
5.5.5 Display
5.5.6 Power Supply PCB
5.5.7 Carriage Motor
5.5.8 Document Motor
5.5.9 Printhead
5.5.10 Carriage Drive Belt
5.5.11 Document Drive Belt
5.6 TROUBLESHOOTING 5.6.1 Basic Troubleshooting Procedure
5.6.2 No Display
5.6.3 Defective Keypad
5.6.4 Defective Sensor
5.6.5 No Document Motion
5.6.6 No Carriage Motion
5.6.7 No Print or Light Print
5.6.8 Print Quality
5.6.9 Missing Dots
5.6.10 Erratic Document Feed or Mispositioning
5.6.11 Erratic Character Spacing or False Document Jams
5.6.12 Interface Inoperative
5.6.13 Diagnostic Flowchart
Use this flow chart to assist in troubleshooting.
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5.7 RECOMMENDED SPARE PARTS
5.8 RECOMMENDED SERVICE TOOLS
Printer Diagram
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DP8 & DP9 ASSEMBLY TREE DWG. 75017 REV. C
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