Service manual

THEORY
Electrical
SERVICE MANUAL
2-4
3. Power Supply Circuit
3.1. Configuration
Fig. 2.2 shows the power supply circuit.
The power supply section converts the unstable input (PWR) supplied from the switch
PCB into stable +24 VDC (for motors and print head) and +5 VDC (for logic).
A 2-channel switching regulator IC (#4) converts unstable input into stable output.
Fig. 2.2 Power Supply Circuit