Canon PC720 Support Question
Canon PC720 Support Question
Find answers below for this question about Canon PC720.Need a Canon PC720 manual? We have 1 online manual for this item!
Question posted by mrfiz46 on June 28th, 2012
What Do The Symbols Mean?
I keep getting a symbol on my little control panel that looks like a V.
What does it mean?
Current Answers
Related Canon PC720 Manual Pages
Service Manual - Page 3
...INTRODUCTION
This Service Manual contains the basic facts and figures about the plain paper copier PC720/740/750/770, and is compiled to serve as a handy reference for each step...CHAPTER 2 "COPYING PROCESS" deals with the inner workings of the copier associated with respect to its operation are given. The PC720, PC740, PC750, and PC770 differ from each other for troubleshooting ...
Service Manual - Page 19
... 5 min without further key operation, automatically turning off mechanism becomes activated if the copier is opened for each transparency delivered to the copy tray before the operation stops....is delivered. After copying operation is over, the
auto power-off the power.
1.1 Using Transparencies (PC720/740) 1) Shift the delivery guide plate on the copyboard, and close the copyboard cover.
3) ...
Service Manual - Page 23
... so as not to remove all pieces of paper, set in the cassette, go off, and
the copier will make the remaining number of the multifeeder.
2) Open the right cover, and check if there is... inside the machine.
0 Remove the jam with care.
0
Figure 1-411
COPYRIGHT 1994 CANON INC. CANON PC720/T401759/770 REV.O AUG.1994 PRINTEDIN JAPANRout AU JAPONI
1 - 15
C) Make sure that the cassette is...
Service Manual - Page 33
The copier uses its primary charging roller to maintain primary potential. The primary charging roller...charge the photosensitive drum (primary charging).
Reference: A direct charging system provides such advantages as low application voltage and generates little, if any, ozone. CANON PC720/740/150M0 REV.O AUG.1994 PRINTED IN JAPAN pmplatt AU JAPON)
2 - 3 Primary Charging (step 1)
A-Primary ...
Service Manual - Page 36
...center of special material so that the heater is controlled to the film-this design eliminates the need for warm-up time. CANON PC720,740/750i770 REY.0 AUG.1994 PRINTEDIN JAPAN DIARIME ...facilitating separation.
The fixing heater is why the copier's fixing assembly does not have a cleaning mechanism.
To prevent such a problem, the copier applies a positive voltage to the separation static...
Service Manual - Page 42
...8226; Singlefeeder pick-up
detection (PC720/740)
Q101
CPU +5V
+24V
4
Composite power
supply PCB
Q90O
H Scanning lamp Fixing heater
CPU
Highvoltage circuit
Contact PCB
• Primary charging roller
• Developing cylinder • Transfer charging
roller • Static eliminator
AE/intensity sensor
Thermal control/ overheating thermistor
Control panel
SL
•
Main motor/ main...
Service Manual - Page 63
...DC bias control signal (PDCPWM) based on the DC controller PCB.
The AC bias is controlled to whether or not copy images are being formed. b. c. Switching the DC Bias Voltage Level The copier switches the...transformer (T508) by the pulse signals generated by the microprocessor on the DC/AC bias. CANON PC720/740/750/770 REV.O AUG.1994 PRINTED IN JAPAN omput AU JAPON)
3 - 23 MWAIOPERATIONS...
Service Manual - Page 68
... Bias This bias corresponds to the photosensitive drum.
• during last rotation. CANON PC720/74000770 REV.O AUG.1994 PRINTED IN JAPAN pmpFeat AU JAPAN) For this reason, it controls the bias differently from the photosensitive drum because of a conventional copier, and is a bias applied each :
a.
The transfer ATVC bias is a negative voltage. Outline...
Service Manual - Page 76
...1994 PRINTEDIN JAPAN ompFumt AU JAPON) Outline
The copier uses center reference feeding, in which copy paper is...PC720/740
DC controller PCB 0
CC--opyti
( PS3
Fixing assembly Cassette
Photosensitive drum Registration roller
eliminator
Q751
Figure 3-401a (PC720/740)
PS7 Singlefeeder pick-up roller
Cassette pick-up system consists of the image on the photosensitive drum;
The copier...
Service Manual - Page 91
...' through 'E003' on paper of copies.
6. The data, however, is indicated on the control panel, the copier will respond to a press on the power switch about 5 min or more after you turned ...thermal fuse
exceeds 226°C and remains so for overheating. COPYRIGHT 0 1994 CANON INC. er.
CANON PC720/740/7501770 REV.() AUG. 1994 PRINTED IN JAPAN piPoit AU JAPAN)
3 - 51
The data for ...
Service Manual - Page 92
... tension roller. To correct such displacement, the copier is indicated on . The tension roller is corrected by moving . Correcting Displacement of the range within which displacement is corrected, the fixing film displacement sensor (PS4) turns on the control panel.
(delivery)
Drive roller Fixing film
PS4 FFD
DC controller
PCB
(front)
Tension roller
Swing arm...
Service Manual - Page 94
... of the tension roller is indicated as follows:
1) Turn off the power switch, and leave the copier alone for about 10 min. • The temperature of the Fixing Film" in the Service Handbook ...drop below 100°C.
2) Turn on the power switch. • The copier indicates 'C' on the control panel, and the fixing assembly becomes activated moving the fixing film (about 3 min).
3) After 3...
Service Manual - Page 100
...5V
FU102
Microprocessor (0900)
+5V Control panel
DC controller
PCB
+241i Intensity adjustment/ AE sensor
+24V•U Solenoid
Main transformer
T101
DC power supply circuit
Fixing heater control circuit
Scanning lamp control circuit
High-voltage power supply circuit
... circuit
Transformer
-
POWER SUPPLY
A. CANON PC720/7401750(170 REY.O AUG.1994 PRINTED IN JAPAN pmPRimt AU JAPON)
Service Manual - Page 101
... with the fixing heater is equipped with the DC controller PCB. The copier indicates `E0' on the control panel if charges exist in the capacitor (C123). CANON PC720/14017501770 REVD AUG. 1994 PRINTED IN JAPAN ompRat AU JAPON)
3 - 61 The copier's power switch is a soft switch, and the copier is present. The auxiliary power supply provides the...
Service Manual - Page 103
...The copier's composite power supply PCB is turned off the AC input.
D.
When an error occurs, the microprocessor communicates with the DC controller PCB. The built-in the Control Value...composite power supply PCB has an overcurrent detection function which turns on the display of the control panel.
4. thereafter, the relay (RL601) is equipped with a microprocessor (Q900) which ...
Service Manual - Page 111
...copier's DC controller PCB is equipped with `E000', `E001', 'E002', or 'E003' has occurred. when it identifies an error, it indicates it in particular);
faulty) • Thermal fuse (FU1;
melted) • Triac (faulty)
• DC controller...sec after a press on the control panel. H
Fixing heater (overheating)...PC720/7401750I770 REVD AUG.1994 PRINTED IN JAPAN (imPRimt AU JAPON)
3 -...
Service Manual - Page 117
CANON PC720/7401150/770 REVD AUG.1994 PRINTED IN JAPAN pmPRiut AU JAPAN)
4 - 1 External Covers
Caution:
Remove the covers as necessary to the front upper cover; T Upper cover
C) Lower front cover
© Copyboard cover
© Control panel
Cassette Left cover
® Upper front cover
Figure 4-101
Caution:
The flexible cable for the control panel is connected...
Service Manual - Page 119
... the three claws ®, remove the lower front cover S. Removing the Control Panel 1) Open the copier's top unit.
2) Remove the two screws C), and remove
the front ...select multifeeder mode and make one copy.
00 0
Figure 4-112
COPYRIGHT © 1994 CANON INC. B.
Control Panel
1. CANON PC720174017501770 REY.O AUG.1994 PRINTEDINJAPAN oMPRIMEAU JAPON)
4 - 3
then, press, the Copy Start...
Service Manual - Page 146
disconnect the cable from the DC controller PCB.
0 0
CD Drive roller
C) Tension roller © Fixing film
® Inlet guide... it or soil it
2. Removing the Upper Fixing Unit 1) Open the copier's top unit.
2) Remove the two screws C), and remove
the front upper cover Z.
Caution: The flexible cable for the control panel is made of special material; a
Figure 4-603
4 - 30
COPYRIGHT ...
Service Manual - Page 149
... flexible cable for the control panel is connected to
remove the DC controller PCB 0.
3
PF017, *1°
O0
Figure 4-702
Figure 4-701
COPYRIGHT © 1994 CANONINC. Removing the DC Controller PCB 1) Open the copier's top unit.
2) Remove the two screws C), and remove
the front upper cover. CD 0
3) Disconnect all connectors from the DC controller PCB.
disconnect the...
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