Unit 5: Troubleshooting
INTERFACE TROUBLESHOOTING
This chapter provides a checklist for the various interface types. Locate the checklist relative to the interface used and perform each of the troubleshooting tasks until the problem has been isolated.
PARALLEL INTERFACE
CHK | TROUBLESHOOTING STEP |
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Ensure the interfaces or interface card are correctly installed. Run
Ensure the printer cable is connected to the appropriate LPT port on the host computer. If using a Windows printer driver, ensure the correct port is selected.
Ensure a IEEE1284 printer cable is being used.
Ensure the host’s peripheral settings are set to ECP for faster throughput. Refer to the computer manufacturer’s documentation for details.
Ensure the printer is receiving information from the computer using the Receive Buffer Hex Dump mode. Refer to that procedure within this manual for instructions. The command stream should be continuous and possess 0Dhex and/or 0Ahex (carriage return and line feed) characters throughout. However, there should not be either located between the start (<ESC>A and the stop (<ESC>Z) commands.
Try another port to isolate the problem.
Replace the main circuit board if determined to be the problem.
RS232 SERIAL INTERFACE
CHK | TROUBLESHOOTING STEP |
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Ensure the correct interface module is correctly installed. Run
Ensure the serial cable (Null Modem) meets specifications and is correctly connected at each end.
Ensure the serial cable is not defective.
Ensure the communication parameters for the baud rate, parity, data bits and stop bits are consistent with those being sent from the host computer.
Ensure the printer is receiving information from the computer using the Receive Buffer Hex Dump mode. Refer to that procedure within this manual for instructions. The command stream should be continuous and possess 0Dhex and/or 0Ahex (carriage return and line feed) characters throughout. However, there should not be either located between the start (<ESC>A and the stop (<ESC>Z) commands.
Try another port to isolate the problem.
Replace the main circuit board if determined to be the problem.
UNIVERSAL SERIAL BUS (USB) INTERFACE
If nothing prints during a test print, verify the device drivers have been successively installed by performing the following:
CHK | TROUBLESHOOTING STEP |
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Click on Start, Settings, and then Control Panel.
Click on System within the new window.
Click on the Device Manager tab.
Ensure that the View Device By Type is checked.
Scroll to
Reboot the PC and the printer.
CT4i Series Operator Manual |