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Maintenance ＞ Assembly and disassembly
When replacing the engine PWB (a), remove the EEPROM (U21) from the PWB and then reattach it to the new
PWB.
When replacing the engine PWB, make sure to check the barcode label of the engine PWB and attach correct
one.
Print speed: 55PPM
Part number: 302TR9401*, Barcode label: 2TRxxxx/*XXXxxxxxxxxx*
Print speed: 50PPM
Part number: 302TS9401*, Barcode label: 2TSxxxx/*XXXxxxxxxxxx*
Print speed: 45PPM
Part number: 302TT9403*, Barcode label: 2TTxxxx/*XXXxxxxxxxxx*
Refer to the photo below.
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