Service manual

Principles of Operation
Reset Circuit
The reset circuit sends the -RESET signal to the -RESET terminal of CPU
µPD7810HG (4B). The -RESET signal acts as a hardware initialization signal.
Figure 2-25 shows the reset circuit.
The reset circuit outputs the -RESET signal when any of the following occur:
l
You turn the printer on or off.
0
The host interface or an optional interface inputs the -INIT signal.
Figure 2-25. Reset Circuit
LQ-200/AP3000
2-25