Service manual

The Storage and Transmission Board Assembly
5-23
Replacing the Printer Cables
More detailed instructions for replacing the printhead power cable and the paper sensor
cable are found in “The Printhead Assembly” section of this chapter. This section includes
notes about installing and routing the cables.
The cable connecting the printhead and the capacitor board has changed since the
PageWriter 100, 200, and 200i cardiographs were introduced. On some units, the
printhead power cable does not have a ferrite bead, and attaches to connector J305 on the
control board. On other units, the printhead power cable does not have a ferrite bead, and
attaches to connector J4 on the capacitor board. On the most recent units, the printhead
power cable has a ferrite bead, and attaches to connector J4 on the capacitor board.
When installing the replacement printhead power cable (p/n M1770-61670), attach it to
the same connector as the cable you are replacing. If the cable is attached to connector J4
on the capacitor board, tuck the cable’s ferrite bead between the motor and the capacitor
board.
Before routing the cables from the printhead along the side of the unit and through the
retaining hooks on top of the printer drive assembly, make sure there is enough slack in the
printhead power cable to allow the printhead to move freely during operation. Make sure
the paper sensor cable has enough slack to prevent strain on the paper sensor. Maintain the
slack on these two cables while installing the foam retaining block.
5The Storage and Transmission Board Assembly
Perform the following steps when removing and replacing the storage and transmission
board PC assembly in a PageWriter 200, 200i or 300pi.
Removing the Storage and Transmission Board Assembly
Use an approved method of electrostatic discharge protection, such as an electrostatic
grounding wristband, while modifying the cardiograph.
1. Perform the procedure “Removing the Battery”.
2. Using a T-10 screwdriver, remove the screws at the right and left sides of the expan-
sion slot bracket at the left rear of the cardiograph.
3. There are two slots along the bottom edge of the bracket. Insert a screwdriver blade
less than 0.25 inches wide into a slot, and gently pry the storage and transmission
board out of the cardiograph.
CAUTION