Sub Power Supply Circuit - Oki S900 Service Manual

S900
(4) Paper size sensor
The paper size is detected by IR sensor. The IR transistor transmission to the IR sensor
receiver circuit is shown below.

4.2.6 SUB POWER SUPPLY CIRCUIT

The sub power supply circuit is provided for the internal analog circuit. The circuit configuration
is shown below:
+24V
+24V
The sub power supply is used for CCD A/D, control panel, and logic circuits.
Figure 5.5 Paper size sensor
Switching
Regulator
Linear
Regulator
4-8
Vcc
out
-8V
Linear
+3.3V
Regulator
+5V
+5Va
+12V
+1.5V