Specifications

Chapter 3: Diagnostics 7193 Service Guide
August 199824
Setting Printhead Resistance
This function allows you to change the setting for the printhead resistance. The setting (A-
H) must match the letter stamped on the heatsink in back of the printhead. This is visible
only by removing the L cover (operator panel) of the printer. See “Removing the L Cover”
in the chapter, “Disassembling and Reassembling the Printer,” later in this book.
Caution: The DIP switches are pre-set at the factory and should generally not be changed.
If you must change them, do so carefully to avoid changing other functions. Run the print
test to see the current settings for this function. See “Testing The Printer” in chapter 2.
1. Turn the power off.
2. Turn the printer over and note what the current DIP switch settings are.
3. Set the switches to the settings in the table that match the letter stamped on the
heatsink in back of the printhead.
Printhead Setting
Switch 1 Switch 2 Switch 3 Switch 4 Switch 5 Switch 6
Early 7193 Models* Later 7193 Models*
On On On Off Off Off A A
On On On Off Off On B B
On On On Off On Off C C
On On On Off On On D D
On On On On Off Off E 3
On On On On Off On F 2
On On On On On Off G 1
On On On On On On H 0
*Be sure that the settings are correct for the version of the printer. A-D are the same for
all printers. E-H is used for early models only, while 3, 2, 1, 0 are used for later models.
4. Turn the power back on to enter the settings into the EEROM.
On remote models, the On Line light (green) blinks.
5. Turn the power off.
6. Set the DIP switches to the former settings.
DIP switch 1 must be Off to return the printer to the on-line mode.