Electrical Circuit Operating Principles; C408 Psb/Pse Board - Epson STYLUS PHOTO 925 Service Manual

EPSON Stylus Photo 925

2.2 Electrical Circuit Operating Principles

The electric circuit of the Stylus Photo 925 consists of the following boards.
V
Main board: C475 MAIN
V
Power supply board: C408 PSB/PSE
V
Panel board: C475 PNL
This section provides operating principles of C475 MAIN Board and C408 PSB/PSE
Board. Refer to ê} 2-16. "Electric Circuit" for the major connection of the each boards
and their roles.
C475 MAIN Board
Printer section
Printer section
+3.3VDC +5VDC
C408 PSB/PSE
Board
Figure 2-16. Electric Circuit
Operating Principles
C475 PNL Board
Printer
Mechanism
CR Motor
PF Motor
ASF Motor
Cutter Motor
Head Driver Board
HP/PE Sensor
Electrical Circuit Operating Principles

2.2.1 C408 PSB/PSE board

The power supply boards of Stylus Photo 925 use a RCC (Ringing Chalk Converter)
circuit, which generates +42VDC for drive line and +5VDC, +3.3VDC for logic line to
drive the printer. The application of the output voltage is described below.
Table 2-9.Application of the DC Voltages
Voltage
+42VDC • Motors (CR Motor, PF Motor, ASF Motor, Cutter Motor)
• Print Head common voltage
• Print Head nozzle selector 42V drive voltage
+5VDC • C475 MAIN control circuit logic
• Sensor
+3.3VDC • C475 MAIN control circuit logic
Revision A
Application
40