Canon NP6320 Service Manual page 199

5. 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
COPYRIGHT © 1999 CANON INC.
Q1
Multifeeder paper sensor Pre-registration paper
(MFPD) sensor (PDP1)
J312-5
J312-4
With the copier in With the copier in
STANDBY, raise and STANDBY, raise and
lower the arm manually. lower the arm manually.
• Arm raised: voltage • Arm raised: voltage
approx. 0.6V approx. 5V
• Arm lowered: voltage • Arm lowered: voltage
approx. 0V approx. 0V
Q4
Lens home position sen- Delivery paper sensor
sor (LHP) (PDP2*)
J317-5
J317-4
With the copier in Remove the delivery
STANDBY: insert a cover with the copier in
sheet of copy paper into STANDBY, raise and
the Q4 section. lower the arm manually.
• With paper in Q4: volt- • Arm raised: voltage
age approx. 5V approx. 0V
• With no paper in the • Arm lowered: voltage
Q4: voltage approx. 0V approx. 0.6V
Q7
Cassette 2 paper sensor
(LCPD)
J306-9
J306-8
Remove the lower
cassette with the copier
in STANDBY, move the
arm up and down
manually.
• Arm raised: voltage
approx. 0.6V
• Arm lowered: voltage
approx. 0V
CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
Q2 Q3
Scanner home position
sensor (SCHP)
J312-2 J317-2
J312-1 J317-1
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
Q5 Q6
Cassette 1 paper sensor
(UCPD)
J313-3 J306-6
J313-4 J306-5
Remove the upper cas-
sette with the copier in
STANDBY, move the
arm up and down manu-
ally.
• Arm raised: voltage
approx. 0.6V
• Arm lowered: voltage
approx. 0V
10-21