Epson TM-U220 Series Service Manual page 45

Confidential
Printed output is not normal
Table 3-20 Abnormal Output is Printed
Probable part/probable cause Checkpoints
Communication setting
I/F cable
Printer information setting
Memory switch setting
Drawer 1 or 2 is not kicked out
Table 3-21 Drawer 1 or 2 not Kicked Out
Probable part/probable cause Checkpoints
Drawer kick
Sub circuit board unit (123)
Main circuit board unit (201)
Rev. B
When a question mark (?) is printed,
check communication settings. Make
sure DTR/DSR control is selected by DIP
switch or memory switch.
When a question mark (?) is printed,
check the continuity of the I/F cable with
a tester. Make sure DTR/DSR cross.
Check the printer information setting.
Make sure the following information is
printed:
Maker name: "EPSON"
Printer name: "TM-U220"
Serial No: Serial number on the
manufacturer's plate
Check the memory switch setting. Make
sure it is the same as the setting used by
customer. If you do not know the
customer's setting, make sure it is in the
factory default state. (Refer to page 5-10.)
Check the connection. Make sure the
cable is plugged in securely. Check each
leading pin for drawer 1 or drawer 2.
Check board parts for defects.
Make sure connectors (CNC2 and CNC3)
are connected securely.
Check the parts for defects.
Verify the parts below.
Connector (CN10)
Element (U7)
TM-U220 Type A Service Manual
Action to correct the problem
Select DTR/DSR control. Completed
if ? is not printed.
Replace the I/F cable. Completed if
the operation is normal.
Set again, using the printer status
function. Completed if printing is
normal.
Set again, using the printer status
function. Completed if printing is
normal.
Action to correct the problem
Plug in the connector. Completed if
the drawer is kicked out.
Replace the sub circuit board unit.
Completed if the drawer is kicked
out.
Replace the main circuit board unit.
Completed if the drawer is kicked
out.
Troubleshooting 3-17