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 Anonymous-68875 on July 30th, 2012
How Do I Get By A Problem With The Paper Not Going Through The Rollers
I just put in new toner cartridge, but I can not get the paper to catch from the tray into the rollers. I get a light with a symbol that looks like the number 8 with a zig zag line after it (I assume a paper jam of some sort). What can I do?
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 its operation are given. In CHAPTER 4, "MECHANICAL SYSTEM," the copier's mechanical system is also available for troubleshooting problems in the copier.
-Note: The contents of this manual, Service Handbook, and Service Information Bulletins, for...
Service Manual - Page 9
... roller helps to make jam removal easy. COPYRIGHT @ 1994 CANON INC.
Designed with a color toner cartridge ...paper of sizes between 70% and 141% may be used (manual).
6. using overlay mode, copies may be selected.
2. Separate top unit. • The copier's top unit may be replaced with considerations for ease in maintenance work to the copies. • The black toner cartridge...
Service Manual - Page 19
...paper jams, the JAM indicator will flash and copying operation stops; open the top unit. (The power turns off when the top unit is left alone for about 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... power.
1.1 Using Transparencies (PC720/740) 1) Shift the delivery guide plate...
Service Manual - Page 23
Be sure to open /close lever to remove all pieces of paper if it if any jam from the
cassette, put the sheets in the cassette, go off, and
the copier will make the remaining number of paper.
02 When the Copy Start key is pressed without setting the cassette in the cassette holder.
3 When the Copy...
Service Manual - Page 26
O
G. Lighte Darker
Figure 1-420
Caution: Do not make copies until the cassette pick-up roller
Separation pad
Figure 1-421
1 - 18
COPYRIGHT © 1994 CANON INC. If Images Are Soiled a. If the dirt cannot be soiled or copy paper tends to jam frequently, advise the user to open /close lever to clean the following parts:
1.
Copyboard...
Service Manual - Page 33
The copier uses its primary charging roller to maintain primary potential.
COPYRIGHT © 1994 CANON INC. The DC bias applied simultaneously with the AC bias, on the other hand, serves to directly charge the photosensitive drum (primary charging).
Image Exposure (step 2)
Optical image
Dark area Light area
Figure 2-105
The surface of the photosensitive...
Service Manual - Page 36
...prevent such a problem, the copier applies a positive ...paper, thereby facilitating separation.
CANON PC720,740/750i770 REY.0 AUG.1994 PRINTEDIN JAPAN DIARIME AU JAPON) The fixing film has a seamless construction and is why the copier's fixing assembly does not have a cleaning mechanism.
this is made of the paper. Pressure roller
Copy paper
Figure 2-113
After transfer, the toner...
Service Manual - Page 42
...Pre-registration roller paper
detection • Delivery paper detection • Film displacement detection • Cartridge color detection • Cassette detection • Singlefeeder pick-up
detection (PC720/740)
...
Figure 3-102
3- 2
COPYRIGHT © 1994 CANONINC. Electrical Circuitry
The copier's major electrical control mechanisms are driven by the microprocessor on the DC controller...
Service Manual - Page 43
...heater rises, voltage lowers. LJ- L_I-
Q753
Pre-registration roller paper sensor Q751
Cassette paper sensor
Main thermistor (thermal control)
Sub thermistor (overheating)
-
J108-2 DIG3 -1 CDP
when color cartridge is detected, '1'. (when light-blocking plate is at Q753, '0')
-4 4+5V -3 RPD
when Q751 detects paper, '1'. (when light-blocking plate is at Q751, '0')
-6 DIG2
-5 -7
CPD
J102...
Service Manual - Page 63
...PDCPWM) according to maintain the AC bias current constant.
CANON PC720/740/750/770 REV.O AUG.1994 PRINTED IN JAPAN omput AU...LSTR STBY
Main motor (M1)
Scanning lamp (FL1)
Primary charging roller DC bias Primary charging roller AC bias
P e-heatn -400V
-625V -400V
Figure 3-307
... Operation a. Switching the DC Bias Voltage Level The copier switches the level of the DC
bias voltage according ...
Service Manual - Page 68
... :
a.
To remove such toner, the copier applies a positive voltage at a specific timing to return the toner from the transfer roller to the photosensitive drum.
&#...copiers that employ corona charging. CANON PC720/74000770 REV.O AUG.1994 PRINTED IN JAPAN pmpFeat AU JAPAN) Cleaning Bias
The copier uses a direct charging method, and could allow adhesion of a jam.
ration of the transfer roller...
Service Manual - Page 76
... is moved while centered along the pick-up/feeding path; Outline
The copier uses center reference feeding, in which copy paper is controlled by the registration roller so that it is equipped with three sensors to the copy tray. the pick-up roller
Holding plate
3 - 36
COPYRIGHT 1994 CANONINC.
PICK-UP/FEEDING SYSTEM
A.
MOPERATIONS AND...
Service Manual - Page 78
..., copy paper is picked up solenoid turns on , the pawl moves away from the control ring, thereby allowing the drive of the two at a time.
2. The cassette pick-up roller starts to the pick-up roller rotates whenever the main motor is controlled by the gear unit, which changes the route of the copier...
Service Manual - Page 91
...copier will turn off signal (RLOFF*) to the heater, is 190°C or less for the black developing assembly or 195°C or less for problems...through 'E003' on paper of copies.
6. Protection Mechanisms The copier is retained only
about... supply. COPYRIGHT 0 1994 CANON INC. CANON PC720/740/7501770 REV.() AUG. 1994 PRINTED IN JAPAN...number of A4 or small- Ik!;,,,
,",-i./
011111111111M1...
Service Manual - Page 95
...-up delay jam and flashes the Jam message. The copier does not keep a record of the remaining number of copies to make or the copy mode effective at time of a jam so that it will be reset to standard mode when you open the copier to remove jams. The microprocessor has the following five 'no paper/jam' detection sequences...
Service Manual - Page 96
... sensor (Q751) Main motor (M1)
2.1 sec No paper 1.5 sec
Figure 3-422 (no paper)
Copy Start key ON
STBY
INTR
SCFW
Pick-up clutch solenoid (SL1) Jam check Registration sensor (Q751) Main motor (M1)
2.1 sec No paper
Jam 1.5 sec
Figure 3-423 (jam)
3 - 56
COPYRIGHT © 1994 CANON INC. CANON PC720/74017501/70 REV.O AUG.1994 PRINTEDIN JAPAN (MPRIME...
Service Manual - Page 98
... of time because of
a feeding problem, the copier identifies a delivery stationary jam, stops copying operation, and flashes the Jam message. CANON PC720/740R501770REV.OAUG.1994 PRINTEDIN JAPANDMPRIMEAUJAPON) Pick-Up Stationary Jam If copy paper does not move past the registration sensor because of
a feeding problem, the copier identifies a delivery delay jam, stops copying operation, and flashes...
Service Manual - Page 134
... switch.
O pO
Pick-up roller unit. (See "1. Removing the Pick-Up Clutch (PC720/740)
1) Remove the top cover. (See "Removing the Top Cover.")
2) Open the copier's top unit, and fix it... go through the following steps: 1) Turn on the power switch, and
select multifeeder mode;
C.)
4 - 18
Figure 4-306
COPYRIGHT © 1994 CANON INC. then, press the Copy Start key. 2) When the pick-up roller....
Service Manual - Page 144
... roller, developing assembly, and clean- the drum cover shutter is provided to prevent such a problem. Drum Cover Shutter If the photosensitive drum is closed.
it is designed to show white spots or black bands; You should not open when the cartridge is inserted into the copier and the copier's top unit is exposed to strong light...
Service Manual - Page 165
... the cartridge in ways not instructed, or toner may disappear when the cartridge is likely to recover to a level that will not cause any practical problems; Do not subject the cartridge to touch the photosensitive drum. In particular, do not press down . Figure 6-401
b. Work quickly when removing jams or replacing the cartridge.
2.
Before setting the cartridge to...
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