Error Processing
Printer Operation When an Error Occurs
The printer executes the following operations upon detecting an error:
Serial interface
❏
All mechanical operations stop.
❏
DTR signal is set to MARK (only when DTR/DSR is selected and DIP switch 1-8 is off).
❏
The ERROR LED blinks.
❏
XOFF is transmitted when XON/XOFF control is selected (only when DIP switch 1-8 is off).
Parallel interface
❏
All mechanical operations stop.
❏
The BUSY signal is set to HIGH (only when DIP switch 1-8 is off).
❏
The ERROR LED blinks.
❏
Fault signal is set to LOW.
Data Receive Error
If one of the following errors occurs, the printer prints “?” or ignores the data, depending on the
setting of DIP switch 1-1:
❏
Parity error
❏
Framing error
❏
Overrun error.
Buffer Full Printing
When subsequent data is received after the printer processes one line of data in the print buffer,
the printer automatically prints the processed data and feeds the paper one line.
Detectors and Printing
When the printer detects a paper near-end, it stops or continues printing, depending on the ESC c 4
command setting. The roll paper detector always halts printing when there is no paper.
— 23 —
Summary of Contents for UP-250
Page 1: ...EXTERNAL PRINTER FEB 2000 MODEL UP 250 without price TECHNICAL MANUAL ...
Page 95: ... 86 END END Yes No Action 4 Replace main PCB Replace printer OK Action 4 mechanism assembly ...
Page 136: ... 127 ...
Page 149: ... 140 Main Circuit Board Parts Layout ...
Page 150: ... 141 RS 232 Serial Interface Circuit Board Parts Layout ...
Page 151: ... 142 IEEE 1284 Parallel Interface Circuit Board Parts Layout ...
Page 152: ...RS 485 Serial Interface Circuit Board Parts Layout 143 ...
Page 160: ... 151 Case Unit Lubrication Points Diagram 4 G 31 4 G 31 3 G 31 3 G 31 ...
Page 163: ... 154 EXPLODED DIAGRAM FOR TM U200B U210B NO 1 ...
Page 164: ... 155 EXPLODED DIAGRAM FOR TM U200B U200PB U210B U210PB NO 2 ...