Self-Test; Printer Status Checks - Epson TM-U220 Series Service Manual

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Printer Status Checks

Operation
Power on.
Run the self-test.
*Refer to page 2-2
for operation.
Run the "all
function test" with
the service utility.
*Refer to page 2-7
for operation.
Perform other
checks of
operation.
Once you have confirmed the printer status using the table above, you can perform the
necessary functions below.
Identification of defective parts. (See Chapter 3.)
Preparation for replacing parts. (Read and follow the precautions and notes at the beginning
of Chapter 4.)
Parts replacement, assembly, and disassembly. (See Chapter 4.)
Adjustment and setting. (See Chapter 5.)
Preparation for shipment. (See the Chapter 6 before sending the printer back to the
customer.)

Self-test

Operation
The self-test can be run using the service utility or by operating the control panel. See page 2-12
for information about control panel operation.
Before running the self-test, make sure the roll paper and ribbon are installed correctly in the
printer. Then, turn power off. To run the self-test, turn the power back on while holding down
the FEED button.
The first page of the self-test printout should look like the example in the table below. To print
the second part of the self-test, press FEED again.
2-2 Repair Guide
Normal printer operation
Power LED light comes on.
Mechanical initializing operation occurs.
ERROR LED light is off.
POWER LED light comes on.
Prints the printer status. (See page 2-3.)
Prints the roll pattern after the FEED button
is pressed. (See page 2-3.)
Mechanical initialization occurs.
ERROR LED light is off.
Reads printer status.
Prints the RECEIPT sheet. (See page 2-9.)
Prints the STATUS sheet after confirming the
sensor operation. (See page 2-10.)
Prints the REPORT sheet. (See page 2-12.)
Normal opening/closing of roll paper
cover.
Normal opening/closing of ribbon cover.
The case is dirty.
When a problem occurs
POWER LED does not light. (See page 3-3.)
ERROR LED light. (See page 3-3.)
ERROR LED flashes. (See page 3-4.)
PAPER OUT LED lights. (See page 3-6.)
Self-test cannot be performed. (See page 3-6.)
Printing cannot be performed. (See page 3-7.)
The print result is not normal. (See page 3-12.)
A paper jam occurs. (See page 3-14.)
PAPER OUT LED lights. (See page 3-6.)
The communication test fails. (See page 3-16.)
The print result is not normal. (See page 3-12.)
Drawer kick is not performed. (See page 3-17.)
The sensor does not work. (See page 3-18.)
Parts do not move smoothly. (See page 3-20.)
The case is dirty. (See page 3-20.)
Rev. B