CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-43
5.
Checking the Photointerrupters
1) Set the meter range to 12 VDC.
2) Connect the - probe to GND (CPGND1) on the DC controller PCB.
Figure 2-71
3) Make checks as instructed.
Reference:
The photointerrupers other than those shown in Table 2-8 are connected in a matrix, hence the
omission from the table.
Table 2-8
Sensor
PS1
Scanner home position
sensor (SCHP)
PS2
Lens home position sen-
sor (LHP)
PS4
Vertical path roller pa-
per sensor (PDP)
Q751
Pre-registration roller
paper sensor (RPD)
Checks
During standby, move
the scanner by hand.
During standby, move
the lens mount by
hand.
During standby, move
the detecting lever by
hand.
During standby, move
the detecting lever by
hand.
When the light-block-
ing plate is at PS1,
When the light-block-
ing plate is not at PS1,
When the light-block-
ing plate is at PS2,
When the light-block-
ing plate is not at PS2,
When the light-block-
ing plate is at PS4,
When the light-block-
ing plate is not at PS4,
When the light-block-
ing plate is at Q751,
When the light-
blocking plate is not at
Q751,
Connector
J101-3
J109-10
J132-5
J108-3
Voltage
(approx.)
5V
0V
5V
0V
5V
0V
0V
5V
GND
VR106
VR107
VR104 VR105
CPGND1
CP23