116 Handling
Unrecoverable errors
Normal printer operation is no longer possible when unrecoverable errors occur.
The printer may be out of order. If the same error occurs again even after turning the power back
on, contact your dealer or a Epson service center.
CAUTION:
When an unrecoverable error occurs, turn off the power supply immediately.
Unplug the AC cable from the printer when the power switch is invalid.
❏ TM-L90 unrecoverable errors
Unrecoverable Errors
Error name Type of error Error LED flash code Recovery measure
R/W error in memory After R/W checking, the
printer does not work
correctly.
Impossible to
recover.
High voltage error The power supply voltage
is extremely high.
Impossible to
recover.
Low voltage error The power supply voltage
is extremely low.
Impossible to
recover.
CPU execution error The CPU executes an
incorrect address or I/F
board is not connected.
Impossible to
recover.
Internal circuit
connection error
Internal circuits are not
connected correctly.
Impossible to
recover.
UIB error An abnormal operation
occurs in UIB.
Impossible to
recover.
Approx.5120 ms
LED ON
LED OFF
Approx.2560 ms
LED ON
LED OFF
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