This service manual cover models:
MA52A / MA52D – SD4410
MB52A / MB52D – SD4420
MC52A / MC52D – SD4430
MD52A / MD52D – SD4450
ME52A / ME52D – SD4490
This manual is in the PDF format and have detailed Diagrams, pictures and full procedures to diagnose and repair your Contex.
Table of contents:
Introduction to CIS Technology
CIS Element buildup
1. DESIGN Mx52A
Block Diagram, Electronic
Wiring Diagram, Electronic
Power Supply layout and measuring points (SMPS)
Scanner Control Unit layout and measuring points (SUI)
Interface Board layout and measuring points (IMM)
CIS Construction, Electronic
Design Mx52D
Block Diagram, Electronic
Wiring Diagram, Electronic
Power Supply layout and measuring points (SMPS)
Scanner Control Unit layout and measuring points (SUL)
CIS Construction, Electronic
2. TROUBLESHOOTING
Troubleshooting Sequence
Diagnostic LED’s (Mx52A only)
Dust problems
Stitching problems
Banding problems
Image quality problems
3. PART REPLACEMENT Mx52A
Scanner Control Unit (SUI)
CIS Unit
Interface board
Power Supply
Stepper Motor Assy
Belt tension
Tacho Sensor
Sensors
Power Inlet
EMI Filter
Cooling Fan
Top cover and Operators Panel
RHS Bottom Cover
LHS End Cover
Glass Plate
Pressure Rollers
Gas Spring for CIS Unit
Castors
Basket
Rubber Feet for Scanner
Identifying parts
Complete list of parts
4. PART REPLCEMENT Mx52D
Scanner Control Unit (SUL)
CIS Unit
Power Supply
Power Inlet
Stepper Motor Assy
Belt Tension
Tacho Sensor
Paper and Lid Sensors
USB Cable
Top cover and Operators Panel
Identifying parts
Complete list of parts
Appendix A
SCAN test, walk though
600 dpi and 1200 dpi scan modes
Appendix B
Firmware Download, walk through
Appendix C
Scanner Terms
Appendix D
Error Codes
About Contex SD4410/ SD 4420/ SD4430/ SD4450/ SD4490 Technical Guide Documentation
This page provides technical documentation for the Contex SD4410/ SD 4420/ SD4430/ SD4450/ SD4490 Technical Guide used by service technicians and maintenance professionals.
The service manual typically includes troubleshooting procedures, adjustment instructions, service mode information, internal component layouts and maintenance guidelines required for proper repair and servicing.
These documents are commonly used in professional repair environments where accurate technical reference and correct service procedures are required.