Epson TM-U950 - Page 72

Rev. A Mechanism Configuration and Operating Principles 2-27
TM-U950/U950P Technical Manual
Figure 2-41. Block Diagram of TM-U950 Main Board
Figure 2-41a. Block Diagram of TM-U950P Main Board
Circuit Board Unit
Connected
to host
interface
Connected
to drawer
Connected
to PS-150
CNIF1
CN5
CN6
CN8
CN4
CN3
R
J
Host
interface
circuit
(parallel)
Drawer
kick-out
driving
circuit
Power
circuit
Address bus
Data bus
Operation panel and
cover sensor circuit
Various
sensor
circuit
Various solenoid
driving circuit
Paper feed
motors (R,J)
driving circuit
Auto cutter
driving and
sensor circuit
Carriage motor
circuit
Print head
driving
circuit
Irregular
operation
protection circuit
Power switch
+5V
+24V
CN1
EEPROM
RAM
ROM
CPU
Gate
Array
DIP
switches
Reset
circuit
Switch PCB unitPrinter mechanism assembly
Main Circuit Board Assembly
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