—
— 139
"L" indicates:
Printer transmission data
SD1 > SD2
Printer reception data
RD1 > RD2
The transmission data is H = 1, L = 0
Note: This format is used when the UART for RS-232 is connected to the RS-485 driver.
Printer reception data level
Printer transmission data level
RD1
RD2
Read data
H
L
SD1
SD2
Send data
H
L
L
H
L
H
Receiving data line is at the LOW level
Receiving data line is at the HIGH level
Sending data line is at the LOW level
Sending data line is at the HIGH level
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 ...