Unit 4: Printer Configuration
CT4i Operator’s Manual
4-14
4.4.8 Errors during Font and Program Download Modes
• Possible causes of errors could be that the data transfer is not correct between the printer and host,
due to interface setting incompatibilities or faults in the cable.
The flash ROM may be in a state that does not permit data being written to it. The following error
diagnostics are useful to help you troubleshoot the actual cause(s):
CAUTION
• Make sure that you do NOT turn the printer OFF when data is transferring to the flash ROM in
Program or Boot Download mode, as it may corrupt the firmware and prevent the printer from starting
up correctly.
• Ensure that the printer is running on a stable power supply during such flash ROM writing operations.
4.4.9 Boot Download Mode (DSW1-8=ON + FEED + POWER ON)
This is a critical mode meant only to be handled by experienced operators. Avoid using this mode if you
are not clear about its function.
Cause
ONLINE
ERROR
BUZZER
LED
Display
Flash ROM Error
OFF
ON
1 long beep
O
Error during data download
OFF
OFF
1 long beep
F
Error during font download
ON
ON
3 short beeps
F
Turn Printer ON
DSW1 - 8= ON + FEED + POWER ON
Wait to receive
program data
Download
Using the printer tool enables the boot program to be
downloaded to the printer.
Download
Complete
During download, actual state will be indicated on the 7-
segment LED.
Summary of Contents for CT 412i
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