Epson TM950 - B/W Dot-matrix Printer User manual

TMTM--U950U950
Troubleshooting Guide.Troubleshooting Guide.
Please use the following flowcharts to help you to diagnose what is wrong
with your printer.
When the flowcharts call for a product to be returned to PC-PoS, please
contact PC-PoS before the unit is sent back.
Some of the following flowcharts discuss changing the Dip switch settings
so that they are appropriate for the intended application. If you are not fully
conversant with doing this then either contact your local dealer or contact
the PC-PoS technical support department nearest to you.
These flowcharts are intended as a basic fault-finding guide only and we do
not encourage any repair to the internal mechanisms or electronic
components by non-PC-PoS technical staff as this will render the warranty
invalid. If you have any questions regarding this matter then please contact
PC-PoS.

The Basic Guide.
Start
Is the POWER
LED lit?
Power On
Go to
part 1.
No
Is the
PAPER OUT
LED lit? (*)
Yes
No
Is the ERROR
LED lit?
Yes
Go to part
4.
Yes
Is the ERROR
LED flashing?
Go to part 4. (See
also at the end of
this guide)
Yes
No
No
Execute the self-test
(See part 4for details on how to do this).
Is the self-test
normal?
Is the printout
normal?
Terminal sends print data
Go to
part 7.
END
No
No
Yes
Yes
Is the paper roll
not loaded or
near roll end?
Load roll paper.
OK?
END
Yes
No
No
Yes
Go to
part 6.
Go to part 2.
Is Paper Semi-
Auto Loading
Correctly?
Go to part
5.
Yes
No
Is the SLIP LED
lit or Flashing?
Go to part
3.
Yes
No

Part 1.
Power LED does not light.
Start
Is the power supply
cable connected
properly?
Connect power supply cable properly. To
make certain this is done, remove the
connector completely and re-insert.
OK?
Is the Power supply
OK? I.E has it been
tested on another
device?
Connect supply to another known
working printer and test it.
PSU
OK?
Check Fuse in mains plug and check for damage to
cable or connector. Re-test the Power Supply on
another unit before proceeding. If you had to
change the fuse and start the main flow-chart again.
PSU
OK?
Return unit to PC-PoS.
Beyond Local Repair.
END
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No

Part 2.
Paper Out LED is lit.
No
Yes
Start
Turn the printer off for 30
seconds and then turn back
on again.
OK?
END
Yes
No
Is the cover
closed correctly?
Close the cover correctly. The best way to do
this is to open the cover and then closing it
again fully making certain to feed the paper
properly.
OK?
END
Yes
No
Return unit to PC-PoS.
Beyond Local Repair.
END

Part 3.
SLIP LED lit or flashing.
No
Yes
Start
Turn the printer off for 30
seconds and then turn back
on again.
OK?
END
Yes
No
Is the cover
closed correctly?
Close the cover correctly.
The best way to do this is to open the cover
and then closing it again fully.
OK?
END
Yes
No
Return unit to PC-PoS.
Beyond Local Repair.
END

Part 4.
Error LED is Lit or Flashing.
Start
Are the connectors to
the printer hooked up
correctly?
Hook up connectors correctly.
The easiest way to do this is to remove
the connectors, while the power is off,
and re-connect them.
OK?
END
Yes
No
Is the paper type
selected correctly by
DIP switch?
Turn the printer power off and change the DIP switch
settings to the proper setting for the type of paper
being used. (See the end of this document for the
appropriate settings)
OK?
END
Yes
No
Has the printer
recovered from
the error?
Reset the printer by switching it
off for at least 30 seconds.
Wait for the print head
temperature to drop if excessive.
Return unit to PC-PoS.
Beyond Local Repair.
END
No
No
Yes
Yes

Part 5.
Paper is not Auto-Loading
Correctly.
No
Yes
Start
Is paper jammed
in the paper inlet
path or anywhere
in the printer?
Remove the paper jam. The best way to do
this is to take out ALL paper rolls from the
printer and then clean the inside to make
certain that all debris is removed. Re-load
paper when finished and re-test.
OK?
END
Yes
No
Return unit to PC-PoS.
Beyond Local Repair.
END

Part 6.
Self-test is not normal.
The Self-Test.
To initiate the self-test for the RECEIPT part of the printer, follow these instructions:
1. Make certain there is either a paper roll or a label roll inserted and loaded into the
printer before starting.
2. Turn off the printer using the power button.
3. Turn the printer on while keeping the RECEIPT FEED button depressed. The
self-test should now start and the information printed will give the status of the
printer.
4. When the test print is complete, the following will be on the last line of print,
“Self-test printing, Please press RECEIPT FEED button.” The RECEIPT OUT/
JOURNAL OUT LED’s flash to indicate the standby condition.
5. Press the RECEIPT FEED button to continue the self-test or switch the printer off
and then back on again to resume normal printing.
To initiate the self-test for the SLIP part of the printer, follow these instructions:
1. Turn off the printer using the power button.
2. Turn the printer on while keeping the JOURNAL/ SLIP FEED button depressed.
The SLIP LED should now be flashing. Insert a piece of paper into the slip
printing area then printing will commence and the information printed will give
the status of the printer.
3. When printing is complete, the SLIP LED will be flashing. To continue the self-
test, insert more paper in the slip part of the printer or switch off and back on
again to resume normal printing.

Part 6 cont.
Self-test is not normal.
Start
Does the printer
operate at all?
Is the cover
closed properly?
Close cover properly.
OK?
END
Yes
No
Return unit to PC-PoS.
Beyond Local Repair.
Printing is carried out, but
print quality is deficient or
paper feeding is not normal.
Is the Ink Ribbon
installed correctly?
Does it have enough
ink?
OK?
END
Yes
Install print ribbon correctly or
change print ribbon for a new one.
Return unit to PC-PoS.
Beyond Local Repair.
No
No
No
Yes
Yes
Yes
No

Part 7A (Serial Version)
Data from host is not printed normally.
Start
Set SW7 of DIP switch bank 1 to OFF.
Send data from host to printer.
Is “?” printed?
Are RS-232 interface
parameters set to
identical values at host
printer? Make settings identical
OK?
END
Yes
No
Does interface
cable match
specifications?
Replace with a proper
cable
OK?
END
Yes
No
Is the interface
cable damaged or
broken?
Replace interface
cable.
OK?
END
Yes
No
Return unit to PC-PoS.
Beyond Local Repair.
Yes
Yes
Yes
Yes
No
No
No
No