Main Components; Main Control Board (C106 Main Board); Power Supply Unit (C106Psb/Pseboard); Figure 1-9. C106 Main Board Component Layout - Epson STYLUS 4001968 Service Manual

General Description

1.5 MAIN COMPONENTS

The main components of this printer are:
Q Main control board (C106 MAIN BOARD)
Cl Housing

1.5.1 Main Control Board (C106 MAIN BOARD)

The C106 MAIN BOARD is the main conboller of the Stylus 800. It takes charge of interfacing with
the host computer and processing of received print data, as well as control of the whole printer
mechanism. This board consists of the following components.
CPU (IC1):
Gate-array (IC3):
Program ROM (IC4):
RAM (IC5):
CR Motor driver (IC13):

Figure 1-9. C106 MAIN BOARD Component Layout

1-14
8-bit CPU (TMP96C141F-20)
19.6608 MHz operating clock
Includes the following functions:
- MMU (Memory Management Unit)
- IFU (Interface Control Unit)
- BMU (Bit Manipulation Unit)
- PCU (1/0 Port Control Unit)
- Head control unit (2 channel: HCU1, HCU2)
1 Mbit EPROM
4 Mbit Mask ROM (IC8 / for US, Pacific version)
8 Mbit Mask ROM (IC7 / for European version)
1 Mbit PSRAM
1 Kbit (64 Bit) EEPROM
x 16
3 lines serial bus
Hybrid IC SMA7024MEL
Constant current unipolar drive
Hybrid IC SMA6501
Constant voltage unipolar drive
STYLUS 800 Service Manual
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Rev. A