Circuit Operation - Epson DFX-9000 Service Manual

Epson DFX-9000

2.3 Circuit operation

The printer includes the following circuits.
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
The following diagrams show the basic PCB configuration and internal
connections:
Host computer
Parallel / serial / USB
(Type-B)
ROM Board
• Main control circuit
• 3.3 V voltage generation/ retention circuit
• Motor drive circuits
• Head drive circuit
• Interface circuit
OP Board
• LCD / LED display
• Operator switches
Figure 2-20. Basic Circuit Board Configuration
Operating Principles
.
Power Unit
• +42 V /SG3
• +37 V /SG2
• +5 V /SG1
USB
Interface
Parallel
Interface
Serial
Interface
Type-B
Interface
AC
In
OP Board
Figure 2-21. Internal Connection Diagram
Circuit operation
ROM Board
Revision B
SP Motor
INLK
SW ASY
LF Motor
Carrier Unit
Carrier
PCB
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