The main circuit board unit contains the following electrical circuits:
❏
Power supply circuit
❏
Reset circuit
❏
CPU [internal RAM: 16K bits (2K x 8 bits)]
❏
Memory [EPROM: 512K bits (64K x 8 bits)]
❏
Operation panel control circuit
❏
Drawer kick-out driver circuit
❏
Print head driver circuit
❏
Paper feed motor driver circuit
❏
DIP switch read circuit
❏
Various detector circuits
❏
Carriage motor driver circuit
❏
Auto-cutter driver circuit
The interface circuit board contains the following:
❏
Reset circuit
❏
Host interface circuit
— 38 —
Circuit board block diagram
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 ...