Epson MR Series Technical Reference Manual page 177

LPT1 loop-back
Select LPT1 loop-back from the pull-down menu to conduct a signal wire test using the loop-
back connector of the parallel port. Please note that a test cannot be performed for the data wire.
The test results are displayed in the following manner.
LPT1 port is disabled
LPT1 loop-back test:OK
LPT1
loop-back
test:Error
LPT1 print test
Select LPT1 print test from the pull-down menu to conduct a print test of the serial port. The test
results are displayed in the following manner.
LPT1 port is disabled
LPT1 print test:OK
LPT1 print test:Error
Rev. I
The designated port is disabled
The test was completed successfully
An error occurred
LPT loop-back connector
1 -STROBE
2 D0
3 D1
4 D2
5 D3
6 D4
7 D5
8 D6
9 D7
10 -ACK
11 BUSY
12 PE
13 SLCT
14 -AFD
15 -ERR
16 -INIT
17 -SLCTIN
18 GND
19 GND
20 GND
21 GND
22 GND
23 GND
24 GND
25 GND
The designated port is disabled.
The test was completed successfully
An error occurred
MR series Technical Reference Manual
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BIOS Functions 5-37