B027 Psb/Pse Power Supply Board; B027 Uf Board; Carriage Assembly (Scanner Head); Figure 1-21. B027 L/F Board - Epson GT-9000 Service Manual

GT-900WES-1200C service Manual

1.9.2 B027 PSB/PSE Power Supply Board

The power supply unit consists of a switching regulator arcuit, which converts the AC line voltage
to the DC voltages (for example, +24 VDC, +5 VDC, +12 VDC, and –12 VDC) used by the scanner.
The B027 PSB board uses a 120 V input type, and the B027 PSE board uses a 220/240 V input type.
Figure 1-20. B027 PSB/PSE Power Supply Board
Board
1.9.3 B027 UF
The B027 I/F board contains interface circuit, connectors for SCSI and optional unit and terminator
switch and SCSI ID switch.

1.9.4 Carriage Assembly (Scanner Head)

The carriage assembly (scanner head) is a 600 dpi CCD (charge coupled device) line sensor. This
unit has OP amplifier and 10-bits A/D converter. It send digital data to the main controller board.
The carriage assembly also contains the RGB noble-gas fluorescent lamps.
Rev. A

Figure 1-21. B027 l/F Board

Figure 1-22. Carriage Assembly

Product Description
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