Outline Of Circuit Boards; Main Board - Epson 3800 - Stylus Pro Color Inkjet Printer Service Manual

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EPSON Stylus Pro 3800/3800C/3850

2.9 Outline of Circuit Boards

2.9.1 Main Board

This section provides a summary of the main board (C653MAIN) that controls the
whole of the printer system.
† Explanation of main elements on C635 MAIN Board
Table 2-8. Main Elements
Model Number
Location
E01A68CB
IC15
FlashROM
IC4
DDR-SDRAM
IC3/IC19
RTC9824
IC9
E09A54RA
IC11
A6628SEDT
IC7/IC13
A6627STPT
IC6
BCM5980A2KFBG
IC10
OPERATING PRINCIPLES
Function
Customized ASIC
Program storage
• Capacity:
16Mbit
Various buffers, work areas
• Capacity:
256Mbit
• Number of pieces: two
RTC complex circuit
(Reset, timer, EEPROM complex IC)
Printer driver
Motor driver
Motor driver
Ethernet 10/100BASE-TX circuit
• Flash ROM (32Mbit), SDRAM (64Mbit x 2)
installed
Outline of Circuit Boards
† Circuit block diagram
DDR-SDRAM
(IC3)
DDR-SDRAM
(IC19)
Flash ROM
(IC4)
RTC9824
(IC9)
CN67
USB I/F 2.0
Flash ROM
(IC1)
Ethenet 10/100BASE-TX
CN102
BCM5980A2KFBG(IC10)
Network
SDRAM
(IC5)
SDRAM
(IC8)
Figure 2-33. C635 MAIN Board Block Diagram
Revision A
CN40
CR Motor
CN43
A6628 (IC13)
ASF Motor
CN44
Ink Change Motor
CN45
Custom
Pressurizing Pump Motor
ASIC
E01A68C
CN57
A6628 (IC7)
(IC15)
Release Motor
CN58
Pump Motor
CN41
PF Motor
A6627 (IC6)
CN41
APG Motor
Custom
CN69/70/
ASIC
71/72
E09A54RA
Print Head
(IC11
58

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