ROM (512K bit)
The printer control program and the character generator data are written in ROM (U8). The
control program controls the basic operations of the printer. All CPU (U5) operations follow this
program.
56
P90
PF A/DSW5
I/O
TTL
Paper feed motor driver control 2-2 phase
excitation. All terminals on (LOW): hold.
DIP SW 1-5 to 1-8 read when P100, P101 are
LOW.
57
P91
PF B/DSW6
58
P92
PF C/DSW7
59
P93
PF D/DSW8
60
RD
RD
O
TTL
External memory data read signal.
61
WR
WR
O
TTL
External memory data write signal.
62
P32
DKD1
O
TTL
Drawer kick-out driver signal 1. LOW: active.
63
P33
DKD2
O
TTL
Drawer kick-out driver signal 2. LOW: active.
64
P40
HEAD8
O
TTL
Print head #8 driver signal. LOW: on.
65
P41
HEAD7
O
TTL
Print head #7 driver signal. LOW: on.
66
P42
HEAD6
O
TTL
Print head #6 driver signal. LOW: on.
67
P43
HEAD5
O
TTL
Print head #5 driver signal. LOW: on.
68
P44
HEAD4
O
TTL
Print head #4 driver signal. LOW: on.
69
P45
HEAD3
O
TTL
Print head #3 driver signal. LOW: on.
70
P46
HEAD2
O
TTL
Print head #2 driver signal. LOW: on.
71
P47
HEAD1
O
TTL
Print head #1 driver signal. LOW: on.
72
P48
HEAD9
O
TTL
Print head #9 driver signal. LOW: on.
73
P51/T04
+24VCOM SW
O
TTL
Head, auto cutter, drawer kick-out power
switch. LOW: drive.
74
P52
CRCOM SW
O
TTL
Carriage motor power switch. LOW: motor
drive.
75
VCC
VCC
I
(+5 V)
Main power terminal (+5 V).
76
P53
PFCOM SW
O
TTL
Paper feed motor power switch LOW: motor
drive.
77
P54
CLK REQ
O
TTL
HOST interface CLK REQ.
78
VSS
VSS
I
(0 V)
GND terminal.
79
P55
RTS
O
TTL
Host interface RTS. LOW: on.
80
P56
PLED/DSW0
I/O
TTL
PAPER OUT LED. Low: on.
DIP SW 2-2 read when P100 is LOW.
CPU pin functions
Pin
No.
CPU
Function
Signal Name
I/O
Level
Description
— 45 —
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 ...