5.5.8Document 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 fastens the document drive pulley to the motor shaft
4.Remove the motor mounting screws. Remove the drive pulley through the motor clearance hole in the right box wall and remove the motor from the side plate.
5.Install the new motor (leads exiting from the bottom) through the side plate and onto the drive pulley and belt. It is easiest to replace the motor mounting screws by holding them with pliers between the side plate and box wall and then fastening them with a screwdriver inserted through holes in the box wall.
6.Locate the drive pulley so it is in line with the driven pulley and fasten it to the motor shaft.
7.Tension the belt (see 5.4.3).
8.Connect the motor to J2 on the Main PCB and replace the cabinet.
5.5.9Printhead
1.If a black bodied printhead is to be installed in a DP8, run 9 0 FUNCT to display the firmware revision which MUST be C1 or greater. A DP8 with A or B series firmware MUST be upgraded to at least C1 before a black bodied printhead can be used.
2.Open the cabinet, raise the carriage with the lift ring and remove the ribbon cartridge.
3.Hold the ribbon shield at its corners between the shield face and shield base. Raise the ribbon guide plate and push the shield down and slide it to the right side to remove it. See picture in 5.4.1
4.Remove the printhead attachment screw. See picture in 5.1.4.
5.Disconnect the printhead from the printhead flex cables.
6.Connect the new printhead to the flex cables and remount it. Insure that the flex cables don’t touch the carriage belt drive pulley or idler pulley bracket when the carriage approaches the left and right box flanges.
7.If possible, reset the printhead gap (see 5.4.1).
8.Replace the ribbon shield and cartridge.
9.For DP8’s only, run 9 4 FUNCT. If the PRINTHEAD TYPE parameter appears after CQ DARKNESS, set it to match the printhead body color. A BLACK head can be damaged if set to SILVER.
10.Adjust LEFT OFFSET, NORMAL and CQ DARKNESS (see 5.2).
5.5.10Carriage Drive Belt
1.Loosen the screw fastening the belt clamp to the carriage and remove the belt clamp.
2.Remove the screw fastening the carriage belt idler pulley to the right box flange. The belt and idler pulley are replaced as an assembly.
3.Install the new belt and clamp it to the carriage.
4.Tension the carriage belt (see 5.4.2).
5.Set the LEFT OFFSET, LEFT MARGIN and CAR ALIGN parameters (see 5.2).
5.5.11Document Drive Belt
1.Loosen the document motor mounting screws and push the motor toward the drive rollers.
2.Slide the belt off the rear roller pulley and remove the belt.
3.Install the new belt through the motor clearance hole in the right box wall and
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