Fatal Errors; Main Pcb Uncustomized Error - Brother CB200 Service Manual

5.1.2

Fatal Errors

Listed below are fatal errors. If a fatal error occurs, the machine may fail to store the error code
into the EEPROM or output it to the recording paper. To signal the fatal error, therefore, the
machine employs flash codes using the ERROR and PAPER LEDs in the following way to indicate
the error code in eight bits with the MSB first.
Error code
55
A5
Interpretation of flash codes using the ERROR and PAPER LEDs
If the ERROR LED flashes once, interpret it as "1"; if the PAPER LED flashes once, interpret it as
"0."
For example, error code A5 is expressed as "10100101" in eight bits with the MSB first, so the
ERROR and PAPER LEDs will flash as follows:
5.1.3

Main PCB Uncustomized Error

In any of the following cases, a main PCB uncustomized error will occur and the machine will enter
the in-process inspection mode.
(1) A new main PCB (not a used board) is installed.
(2) The "Reserved" function (listed in Chapter IV, Section 4.2) in the maintenance mode is
mistakenly activated.
If the machine enters the in-process inspection mode (in which a sequence of the checks will be
automatically made), the ERROR and PAPER LEDs will flash at 0.5-second intervals. To exit this
mode, press the COPY, FEED, COPY ALL, FEED, COPY ALL, and COPY keys in this order
quickly. The ERROR and PAPER LEDs will go off.
Probable causes
Write error into the work area of the RAM.
Access to the EEPROM impossible.
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