Instruction manual
2-2 Mechanisms and Operation Rev. A
Circuit Block Diagram
The control circuitry of this printer is made up of the following major components:
❏ Main circuit board unit-A
❏ Switch circuit board assembly-B
❏ I/F circuit board assembly
UB-S01: RS-232 Serial Universal Board
UB-P01: IEEE 1284 Parallel Universal Board
UB-S02: RS-485 Serial Universal Board
The component connection diagram for the electrical circuitry components is shown below.
Figure 2.2.1 Electrical circuitry component connection diagram
CN1
CN5
CN501
CN502
CN1
CN3
CN4
CN6
CN2 CN5
Main circuit board unit-A
ROM
for "M"
version
Address bus
Sensor
circuits
Auto cutter
drive circuit
Thermal head
drive circuit
Paper feed
motor
drive circuit
Control
panel
circuit
I/F circuit
board
assembly
Host
interface
Host
inter-
face
circuit
Reset
circuit
RAM
ROM
Drawer
Power
supply unit
Drawer
kick
circuit
Power
supply
circuit
Power switch
CPU
Gate
array
Malfunction
protection
circuit
M-T88
printer
mechanism
Auto cutter
Cover
sensor
Paper
sensor
Paper
near-end sensor
Paper
feed motor
Switch circuit board assembly-B
LED, SW
Dip switches
CN1
CN2
CN4
CN2
VCC
+24V
_
+
+24F