Microcom 226 Users Guide - Manual (Page 53)

Chapter 6 Maintenance and Adjustments
226/426 User’s Guide
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3.2 MCA Compressed File Recovery
The printer’s firmware can typically be recovered using this method in the event that during
the MCA update the printer has become unstable. Using this method is only intended to
provide a recovery method and is not intended to update the software stored in the printer’s
flash memory. This method requires the use of a compressed MCA code file, a host
computer equipped with a RS-232 serial port, and a Terminal Emulation Program (i.e.,
HyperAccess, HyperTerminal, Procomm Plus, Tera Term Pro...).
It is a good idea to completely read through the procedure before an update attempt is
made. Do not send any unnecessary characters or re
move the printer’s power during the
update or the printer may become inoperable.
1. Make sure the RS-232 serial connection is made between the host and the printer
including the proper Baud rate.
2. Contact Microcom Corporation support department and/or visit
www.microcomcorp.com to acquire the desired MCA code file.
3. Start the terminal emulation program and set the serial parameters to 115200,n,8,1.
4. While pressing the Auxiliary button (see Figure 21) turn the printer power switch on.
Note: To press the Auxiliary button, use a ballpoint pen and gently press and hold the
switch in.
5. Immediately after applying printer power, observe the terminal window and follow the
sample dialog below. The bold italics text denotes informational comments or
instr
uctions and is not part of the printer’s update dialog.
Found rear button pressed. Load an application, now? (y/n) [n]:
Enter
“y” to load new code  
Request received
Okay. You may send a zipped application file now (e.g.,
MCA_version.zip).
Start of transfer recognized................................
File received
Unzipping. Please stand by (approx. 54 seconds) . . .
Unzipped. CRC32 okay: 0x3fd1bf94
Application file recognized.
Erasing old application....................................
Saving new application...................................................................
Now booting to the new firmware