A/D Converter Circuit - Epson L-1000 Technical Manual

PRINCIPLES OF OPERATION

2.2.8 A/D Converter Circuit

Figure 2-56 shows the A/D converter circuit. The functions of this converter are as follows:
Using shunt regulator TL431CLPB, R37, and R55, reference voltage
NOTE: 2.5 V is the shunt regulator reference voltage.
Using this value as a reference, the + 24 V line is monitored by ANO, the head temperature is monitored by
ANl, and DIP switches and bidirectional adjustment are read using AN2 through AN7.
2-60
V
Figure 2-56. A/D Converter Circuit
V
in this circuit is set as follows:
REF
LQ-500 / L-1000
REV.-A