Canon NP6317 Service Manual page 184

CHAPTER 10 TROUBLESHOOTING
4. Checking Photointerrupters
No.
Purpose
(+) lead
(-) lead
Check; operation is normal
if the meter needle swings to
the right
No.
Purpose
(+) lead
(-) lead
Check; operation is normal
if the meter needle swings to
the right
No.
Purpose
(+) lead
(-) lead
Check; operation is normal
if the meter needle swings to
the right
10-20
Q1
Multifeeder paper sensor
(MFPD)
J311-5
J311-4
With the copier in
STANDBY, raise and
lower the arm manually.
• Arm raised: voltage
approx. 0.6V
• Arm lowered: voltage
approx. 0V
Q4
Mirror home position
sensor (MHP)
J312-2
J312-1
Move the mirror carriage.
• When the light-block-
ing plate is in Q4: volt-
age approx. 5V
• When the light-block-
ing plate is not in Q4:
voltage approx. OV
Q7
Cassette paper sensor
(CPEP)
J303-6
J303-5
Remove the cassette with
the copier in
STANDBY, move the
arm up and down manu-
ally.
• Arm raised: voltage
approx. 0.6V
• Arm lowered: voltage
approx. 0V
COPYRIGHT © 1999 CANON INC.
Q2
Pre-registration paper
sensor (PDP1)
J304-8
J304-7
With the copier in
STANDBY, raise and
lower the arm manually.
• Arm raised: voltage
approx. 5V
• Arm lowered: voltage
approx. 0V
Q5
Scanner home position
sensor (SCHP)
J312-5
J312-4
With the copier in
STANDBY, move the
scanner by hand.
• Scanner in HOME po-
sition: voltage approx.
5V
• Scanner not in HOME
position: voltage
approx. 0V
Q8
Delivery paper sensor
(PDP2)
J314-5
J314-6
Remove the delivery
cover; with the copier in
STANDBY, raise and
lower the arm manually.
• Arm raised: voltage
approx. 0V
• Arm lowered: voltage
approx. 0.6V
CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Q3
Right door sensor
(RDC)
J311-7
J311-6
Open and close the right
door.
• When opening the
door: voltage approx.
0V
• When closing the door
voltage approx. 5V
Q6
Lens home position sen-
sor (LHP)
J312-8
J312-9
With the copier in
STANDBY: insert a
sheet of copy paper into
the Q4 section.
• With paper in Q4: volt-
age approx. 5V
• With no paper in the
Q4: voltage approx. 0V