NCR 7156, Service Manual

Page: 49 / 206

7156 Service Guide Chapter 3: Diagnostics
September 1998 35
10. Close the front cover and press the On Line button (or plunger) on those models.
The green LED flashes when the printer cycles. The settings are entered into EEROM.
11. Press the reset button (under the DIP switches) on those models to cycle the printer.
The green LED flashes when the printer cycles. The settings are entered into EEROM.
Running the Data Scope Mode
This test prints a hexadecimal dump of all data sent to the printer: “1” prints as
hexadecimal 31, “A” as hexadecimal 41 and so on. This helps troubleshoot communication
problems, and runs during a host application (after being enabled in Level 1 Diagnostics).
Enter the Data Scope Mode
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 if the Data Scope Mode is on or off. See “Print Test” in this chapter.
Note: The operator panel may differ depending on the model. To put the printer on- or
off-line, use a paper clip or other pointed object to depress the plunger (in place of the On
Line button) on models with that item.
1. Open the front cover and set the DIP switches to the following settings:
Switch 7 is always Off. Switch 8: On = knife, Off = non-knife
Switch 1 Switch 2 Switch 3 Switch 4 Switch 5 Switch 6
On Off Off On Off On
2. On models with the On Line button (or plunger) on top of the printer, close the front
cover and press the On Line button (or plunger).
The green LED flashes when the printer cycles. The settings are entered into EEROM.
3. On models without the On Line button (or plunger), press the reset button (under the
DIP switches).
The green LED flashes when the printer cycles. The settings are entered into EEROM.
4. Set the DIP switches back to the settings for normal operation (on-line mode).
See “Appendix B: Communication Information” for the switch settings.
5. Close the front cover and press the On Line button (or plunger) on those models.
The green LED flashes when the printer cycles. The settings are entered into EEROM.
6. Press the reset button on those models.
The green LED flashes when the printer cycles. The settings are entered into EEROM.
7. Run a transaction from the host computer.
All commands and data sent from the host computer will be printed as hexadecimal
characters as shown in the following illustration.