Epson LQ 1050 Technical Manual - Page 165

Programmer Tips

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REV.-A If you want to test the printer without a host computer, then set dip SW1 as follow: Table 5-2. Off-Line Diagnostics DIP SW1 FUNCTION OOH RAM Check & CPU check OIH Address/Data line Hi/Lo 02H Home position sensor check 03H Paper end sensor check 04H F/T sensor check (F/T: Friction/Tractor) 05H Control panel SW check 06H Head drive Transistors short circuit check 07H Head drive voltage (+ 24) check 08H Motor drive voltage (Vu) check 09H Paper feed motor phases output OAH Carriage motor phases output i. OBH Plunger solenoid On/Off OCH Plunger drive voltage change drive/hold ODH Paper feed motor drive voltage change drive/hold OEH Plunger enable line change disable/enable OFH Interface control line Hi/Lo 10H Carriage motor current change line Hi/Lo 1 IH All selecType LED On/OFF 5.2.7 Programmer Tips (1) If you are lost in the program, press function key no. 1 IFl] and then the enter key to re-start program. (2) If you want to skip any file (or program), then press the ESC key. If you want to return to a previous file (or program), then press DEL key. f';: 5-8

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REV.-A
If you want to test the printer without a host computer, then set dip
SW1
as follow:
Table 5-2. Off-Line Diagnostics
DIP
SW1
FUNCTION
OOH
RAM
Check &
CPU
check
OIH
Address/Data line Hi/Lo
02H
Home position sensor check
03H
Paper end sensor check
04H
F/T sensor check (F/T: Friction/Tractor)
05H
Control panel SW check
06H
Head drive Transistors short circuit check
07H
Head drive voltage
(+
24) check
08H
Motor drive voltage (Vu) check
09H
Paper feed motor phases output
OAH
Carriage motor phases output
OBH
Plunger solenoid On/Off
OCH
Plunger drive voltage change drive/hold
ODH
Paper feed motor drive voltage change drive/hold
OEH
Plunger enable line change disable/enable
OFH
Interface control line Hi/Lo
10H
Carriage motor current change line Hi/Lo
1
IH
All
selecType
LED On/OFF
i.
5.2.7
Programmer Tips
(1)
If you are lost in the program, press function key no. 1 IFl] and then the enter key to re-start program.
(2) If you want to skip any file (or program), then press the ESC key.
If you want to return to a previous file (or program), then press DEL key.
f’;:
5-8