Ac Line (Ac 120V Household Current); Telephone Line; Printer High Voltage Terminal - Canon LASER CLASS 3175 Service Manual

LASER CLASS 3170/3175/3175MS Chapter 1: Safety and Precautions

1.1.1 AC line (AC 120V household current)

Power supply unit (primary side)
The AC 120V is supplied to the primary side of the power supply unit when the
power cord is plugged in.

1.1.2 Telephone line

NCU board (primary side)
When connected to the telephone line, a line voltage of approx. DC 48V is
supplied to the fax from the telephone line.
And when the ringing signal is received, approx. AC 90Vrms is supplied.

1.1.3 Printer high voltage terminal

When the printer cover sensor is pressed with the printer cover closed, voltage of
approx. AC 1600V p-p maximum is supplied to the printer high voltage terminal.
When you press the printer cover sensor, be careful not to touch the high voltage
terminal.
Figure 1-1 Printer High Voltage Terminal
High voltage terminal
Printer cover sensor
1-2
Printer cover