Epson TM-T20II Technical Reference Guide - Page 18

Unrecoverable Errors, CAUTION

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Unrecoverable Errors If the same error occurs again even after turning the power back on, contact your dealer or a Epson service center. Turn off the power immediately when an unrecoverable error occurs. CAUTION Error Memory R/W error Error description After R/W checking, the printer does not work correctly. High voltage error The power supply voltage is extremely high. Low voltage error The power supply voltage is extremely low. CPU execution error The CPU is executing an incorrect address. Internal circuit connection error Internal circuits are not connected correctly. Error LED flashing pattern LED ON LED OFF Approx. 160 ms LED ON LED OFF Approx. 160 ms LED ON LED OFF Approx. 160 ms LED ON LED OFF Approx. 160 ms LED ON LED OFF Approx. 2.56 s Approx. 160 ms 18

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18
Unrecoverable Errors
If
t
he same error occ
u
rs a
g
a
in
eve
n
af
t
er
tu
r
ning
t
he power back o
n
, co
nt
ac
t
yo
u
r dealer or a
Epso
n
serv
i
ce ce
nt
er.
CAUTION
Turn off the power immediately when an unrecoverable error occurs.
Error
Error description
Error LED flashing pattern
Memory R/W error
After R/W checking, the printer
does not work correctly.
High voltage error
The power supply voltage is
extremely high.
Low voltage error
The power supply voltage is
extremely low.
CPU execution error
The CPU is executing an
incorrect address.
Internal circuit
connection error
Internal circuits are not
connected correctly.
LED ON
LED OFF
Approx. 160 ms
LED ON
LED OFF
Approx. 160 ms
LED ON
LED OFF
Approx. 160 ms
LED ON
LED OFF
Approx. 160 ms
LED ON
LED OFF
Approx. 160 ms
Approx. 2.56 s