Epson DFX-9000 - Circuit Operation

Epson DFX-9000 Revision B
Operating Principles Circuit operation 77
2.3 Circuit operation
The printer includes the following circuits.
The following diagrams show the basic PCB configuration and internal
connections:
.
Figure 2-20. Basic Circuit Board Configuration
Figure 2-21. Internal Connection Diagram
Table 2-6. DFX-9000 Circuit Boards
Board Function
ROM Board  Main control circuit
 3.3 V voltage generation/ retention circuit
 Motor drive circuit
 Head drive circuit
 Interface circuit
OP Board  LCD display
 LED display
 Operator switches
Power Unit  +42 V, +37 V, and +5 V supply
Host computer
Parallel / serial / USB
(Type-B)
• Main control circuit
• 3.3 V voltage generation/ retention circuit
• Motor drive circuits
• Head drive circuit
• Interface circuit
• LCD / LED display
• Operator switches
• +42 V /SG3
• +37 V /SG2
• +5 V /SG1
ROM Board Power Unit
OP Board
USB
Interface
SP Motor
LF Motor
Carrier Unit
Carrier
PCB
OP Board
Sensor Board Unit
(Each motor/ FAN/ sensor)
INLK
SW ASY
ROM Board
Parallel
Interface
Serial
Interface
Type-B
Interface
AC
In
Power Unit
(100/240 V)
CNUSBCN1284CNRS232CCNTYPEBCNPWCNLOGPWCNOPCNSEN1CNSEN2
CNSPHSCNSPMCNINLKCNLFCNFHD1CNFHD2CNRHD1CNRHD2CNHD3
Print Head (36 pins)
Temperature detection
thermister mounted