Operating Principles Of The Main Control Circuit - Epson Stylus 800 Service Manual

2.3.2 Operating Prlnciplea of tha Main Control Circuit
The C134 MAIN board is the main cxmtrol circuit of this printer. 'his circuit is controlled by the
l&bit TMP96C141F CPU (ICI), running at 19.6fXXl MHz This CPU has a unique architecture,
making it capable of handling data a an 6-bit bus width data bus or a 16-bit bus width data bus.
speed. Gate array E05BW (IC3) manages printhead drive control, extemaI I/F control (fir%
drive motor and the paper feed motor. This board also is equipped witha 93C46 EEPROM (IC1O)
to store parameters, such as the pMter mechanism control parameter, default setting parameters,
as well as the special counter value used for printhead protection.
I
I
P61x
Control
Panel
Figure 2-16. Main Control Circuit Block Diagram
2-12
+35 VDC
I I
ADO-15
CR Motor PF Motor
Mask ROM Mask ROM
Rev. A