Canon G3 Error Code List page 135

##346 [ TX/RX ] The machine inside temperature is faulty
Cause
• The inside of the machine has overheated.
• The thermistor is faulty.
• The system control board is faulty.
##347 [ TX/RX ] RAM/DRAM check error has occurred for
Cause
• The ROM used to control the BJ printer is
faulty.
• The DRAM used to control the BJ printer
is faulty.
• The system control board is faulty.
Remedy
• Turn off the power, and disconnect the
power cord; then, leave the machine alone
for a while so that the inside of the ma-
chine cools.
• Replace the thermistor.
• Replace the PCB that includes the ther-
mistor.
• Turn off and then on the power.
• Replace the system control board.
BJ printer control
Remedy
• Turn off and then on the power.
• Replace the ROM used to control the BJ
printer.
• Turn off and then on the power.
• Replace the PCB that includes the DRAM
used to control the BJ printer.
• Turn off and then on the power.
• Replace the system control board.
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Chapter 2: Service Error Codes