Service Manual

OTHER CONTROLS

2-43

II UNIT EXPLANATION

11.5 Counter Control

11.5.1 Counter composition

11.5.2 Counter operation

This machine uses the following two software counters to count the number of copies. However, the con-

tent of the number display counter on the OB (Operation board) may differ depending on the operating

condition of the machine.

A. Paper feed counter

This counter increments when the 1st paper feed for the next copy comes ON.

B. Paper exit counter

This counter increments when the PS2 (Fixing exit sensor) goes ON → OFF.

C. Number display counter on the OB (Operation board)

Symbol Name Function or method

OB Operation board Displays the number of copies by means of the LED.

TC Total counter

(7145 provided as a standard equipment)

(7235/7228/7222 optional)

Displays the total number of copies.

This is a mechanical counter driven by an electric signal.

KC Key counter (optional) A counter used to make copying unavailable after the

specified number of copies is counted

This is a mechanical counter driven by an electric signal.

PS2 Fixing exit sensor Detects paper at the fixing exit. This information

becomes a control signal source for each counter.

Photosensor + actuator

Normal operation Jam

Indicator shows a count from the paper feed counter. Indicator shows a count from the paper exit counter.

7322ma2011e

7145 7235/7228/7222

SCB

(OPTION)

PS2