Unrecoverable Errors - Epson TM-L90 Developer's Manual

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Unrecoverable errors

Normal printer operation is no longer possible when unrecoverable errors occur. These errors
mean that the printer requires servicing and repair.
Unrecoverable Errors
Error name
R/W error in memory or
gate array
High voltage error
Low voltage
error
CPU execution
error
Internal circuit
connection error
UIB error
Note:
When unrecoverable error occurs, turn off the power supply immediately.
If the power supply function is disabled, press the power supply switch more than 3 seconds to reset the
printer.
Rev. A
Type of error
After R/W checking, the
printer does not work
correctly.
The power supply voltage is
extremely high.
The power supply voltage is
extremely low.
The CPU executes an
incorrect address or I/F
board is not connected.
Internal circuits are not
connected correctly.
An abnormall operation
occurs in UIB.
TM-L90 Developer's Guide
Error LED Flash code
Approx.320 ms
Approx.5120 ms
Approx. 2560 ms
Description of Functions 3-7
Recovery measure
Impossible to
recover.
Impossible to
recover.
Impossible to
recover.
Impossible to
recover.
Impossible to
recover.
Impossible to
recover.