Main Components; Main Control Board (C164 Main Board); Figure 1-9. C164 Main Board Component Layout - Epson Stylus Pro Service Manual

Product Description

1.5 MAIN COMPONENTS

The main components of the Stylus Pro are:
o

Main control board (C164 MAIN Board)

o Power supply unit (C137 PSB/PSE Board)
o Control panel board (C137 PNL Board)
o Printer mechanism (M-4A10)
o Housing
1.5.1 Main Control Board (C164 MAIN Board)
The main control board (C164 MAIN Board) consists of an H8/3003 16-bit CPU, E05A09 gate array, a
program ROM (1/2/4Mb), a program/CG ROM (1/2/4/8Mb), 1 DRAM (4Mb), a mask ROM (4/8Mb), an
EEPROM (1Kb), and a lithium battery for powering the protect counters. The reset IC (M51955 and PST 592)
is equipped with both a logic system and a power system. The C164 MAIN Board is almost the same as the
C162 MAIN Board, except that the C164 board has no solenoid driving circuit for the ADF. (The C162
MAIN Board has a solenoid driver to operate the document feeder. )
Table 1-18. Comparison between C164 MAIN and C162 MAIN
Main Board
DRAMs
ADF Plunger
Driving Circuit *
* The ADF plunger switches the PF motor operation from paper feed to paper pickup.
Head Common Drive Tansistors

Figure 1-9. C164 MAIN Board Component Layout

1-18
C164 MAIN Board
1
None
Gate Array (E05B09)
E E P R O M
Lithium Battery
1 6 4
PF Motor Driver IC
CR Motor Driver IC
Stylus Pro Service Manual
C162 MAIN Board
2
Equipped
CPU (H8/ 3003)
R A M
Program ROM
CG RO M
Rev.B