Epson DM-M820, Technical Reference Manual, Page: 177 / 324

Rev. I BIOS Functions 5-37
MR series Technical Reference Manual
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 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
The designated port is disabled
.
LPT1 loop-back test:OK The test was completed successfully
LPT1
loop-back
test:Error
An error occurred
LPT1 port is disabled The designated port is disabled.
LPT1 print test:OK The test was completed successfully
LPT1 print test:Error An error occurred
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
LPT loop-back connector