Craden DP9 User Manual

5.0 MAINTENANCE 5.1 LUBRICATION AND CLEANING 5.1.1 Lubrication There are no lubrication points in the printer. All parts are either perman

5.5.3 Sensor PCB 1. Turn off power and disconnect the flex cable from the sensor PCB. 3. Remove the two nuts fastening the PCB to the input guide.

5.5.8 Document Motor 1. Remove the cabinet (see 5.5.1). 2. Disconnect the motor from J2 on the Main PCB. 3. Loosen the 1/16” Allen screw that fasten

5.6 TROUBLESHOOTING 5.6.1 Basic Troubleshooting This procedure exercises everything in the printer except the interface to the host system. If any

5.6.4 Defective Sensor All sensors transmit infrared light and sense light reflected by a document, gap roller or cabinet. The sensors are automati

5.6.7 No Print or Light Print If there is no printhead noise when the carriage traverses a document: 1. Check that the printhead is plugged into th

5.6.9 Missing Dots If a single row of dots is missing: 1. Refer to the printwire pinouts on the main PCB schematic. Pin 4 prints the uppermost dot

5.6.13 Diagnostic Flowchart Use this flow chart to assist in troubleshooting. Is the display on the printer blank? No Yes Do the keys on the key

5.7 RECOMMENDED SPARE PARTS Machine Population: 1 10 25 50 100 250 Class A Spares Qty: 1 1 2 3 5 10 Class B Spares

5.1.4 Printhead Cleaning Perform if printwires stick when printing begins or print quality becomes intermittent. Be sure to check the ribbon first!

5.2 SERVICE PARAMETER SET-UP PROCEDURE It may be necessary to change service parameters that compensate for certain mechanical tolerances. T

5.4 MECHANICAL ADJUSTMENTS 5.4.1 Printhead Gap Too large a gap causes light print and missing dots. Too small a gap causes ribbon smear. 1. Open th

5.4.1.1 Ribbon Shield Removal / Replacement The ribbon shield prevents ribbon fabric from rubbing on and smearing printed media. It is a consumable.

5.4.1.1.1 Ribbon Shield Face Inspection A high percentage of printers sent to Craden for repair has a ribbon shield that has reached end of life and

5.4.2 Carriage Drive Belt Tension The carriage belt connects the carriage drive motor to the carriage. Incorrect carriage belt tension

1. Use a spring gauge to measure the force required to raise the right end of the rear upper roller very slightly. It should measure 6 to 8 ounces (17

5.4.8 Front Document Roller Spring Force Gate travel must be properly adjusted (see 5.4.7) before roller spring force is adjusted 1. Raise the gate