Chapter 6: Maintenance and Adjustments
SPD-M20A Service Manual
70
6) When the version upgrade starts, the status indicator goes off.
7) The version upgrade operation normally takes about 1 minute. When it is completed,
the message "ROM UPDATE IS COMPLETED!!!" is displayed.
8) When the instrument is turned off, and then on again, it start up using the new ROM.
< Upgrade by Way of RS-232C (2) >
If the ROM content is not destroyed, but for some reason the version update was not
possible by way of a network (when the power is switched on, the aforementioned LED
state is not achieved), the ROM can be rewritten via the serial port using the following
procedure.
1) Connect the COM ports of the instrument to be upgraded and a PC using an RS-232C
cross-over cable. If there are multiple COM ports, use COM1. (The version upgrade
program may not operate properly with other than the COM1 port).
2) Start the Terminal software (Hyper terminal, etc.) on the PC, and set the transmission
parameters to 9600 baud, 8 bit, Parity none.
3) While pressing the INIT switch at the rear of the instrument, switch ON the power to
the instrument. Release the INIT switch between 1 - 5 seconds after switching ON the
instrument.
4) When the message "Press Enter key to proceed" is displayed, press the Enter key.
5) From the following menu that is displayed, select "v. ROM Version Up from serial port"
(press [V]).
6) The instrument's LED enters the state described in step 2) of "6.10.2 Upgrade by Way
of RS-232C (1)". Exit the terminal software, and complete the version upgrade by
performing the steps from 3) to the end of the procedure in "6.10.2 Upgrade by Way
of RS-232C (1)".
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