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 tomyun on November 12th, 2011
Paper Jam Problem
I JUST REPLACED THE CARTRIDGE AND WHEN I TRY TO MAKE A COPY I GET THE SYMBOL THAT THERE IS A PAPER JAM. HOWEVER AFTER INSPECTING THE INSIDES THERE IS NO PAPER JAM. WHAT CAN BE DONE TO FIX THIS?
Current Answers
Related Canon PC720 Manual Pages
Service Manual - Page 3
... Service Handbook is also available for troubleshooting problems in the copier.
-Note: The contents of its operation, disassembly, reassembly, and adjustment. Multifeeding (manual)
-
Copying speed (cpm)
8 10 10 12... the plain paper copier PC720/740/750/770, and is discussed as to its operation are expected to be thoroughly familiar with the generation of replacement parts and ...
Service Manual - Page 9
... be replaced with a color toner cartridge (red, blue, green, brown); FEATURES
1.
Fixed copyboard with considerations for ease in maintenance work to 1/000 of sizes between 70% and 141% may be given an extra finish.
7. Uses a SURF fixing assembly. • The use of a charging roller helps to make jam removal easy. Separate top unit. • The copier's top...
Service Manual - Page 19
...activated if the copier is opened for each transparency delivered to suit the reproduction ratio you press the Default Ratio key, the ratio changes as follows for removal of the jam.)
g. a. ... must not set the ratio between 70% and 141% in 1% increments. b.
If paper jams, the JAM indicator will flash and copying operation stops; A4/LTR
B5►A5/STMT
4 ► A5 (AB/Inch- COPYRIGHT ...
Service Manual - Page 23
.... 1) Check if paper is set copy
paper. Remove it . C) Make sure that the cassette is a jam. Remove the paper if found.
3) Shift the open the body.
CANON PC720/T401759/770 REV.O AUG.1994 PRINTEDIN JAPANRout AU JAPONI
1 - 15 If there is paper in the cassette, go off, and
the copier will make the remaining number of paper from inside the machine.
0 Remove...
Service Manual - Page 26
...1-420
Caution: Do not make copies until the cassette pick-up . *Be sure to wring it . If Images Are Soiled a. If the dirt cannot be soiled or copy paper tends to jam frequently, advise the user ...Copyboard Glass/Copyboard Cover
Wipe it . CANON PC720/7408EORT0 REVS AUG. 1994 PRINTED IN JAPAN tIMPRIME AU JAPONI Using the Density Correction Switch
If the copy density is too high, i.e., the image is...
Service Manual - Page 27
Caution: Do not make copies until the multi pickup roller has dried completely. Static Eliminator 1) Open the copyboard cover, and remove
the static eliminator cleaner. Separation pad Multi pick-up roller
Copy paper Figure 1-422
Figure 1-423
2) Shift up the open/close ...OMPRIME AU JAPONI
1 - 19
COPYRIGHT © 1994 CANON INC. w ,fiKAPJ GENERAL DESCRIPTIONEN
c. Frequent Jams
a.
Service Manual - Page 36
... weaken the static attraction between the photosensitive drum and copy paper, thereby facilitating separation.
To prevent such a problem, the copier applies a positive voltage to the separation static eliminator to the paper while the copy paper moves through the fixing film and the pressure roller.
The fixing film has a seamless construction and is made of special material so that the...
Service Manual - Page 42
... motors, solenoids, and lamps.
Electrical Circuitry
The copier's major electrical control mechanisms are driven by the ...paper
detection • Delivery paper detection • Film displacement detection • Cartridge color detection • Cassette detection • Singlefeeder pick-up
detection (PC720/740)
Q101
CPU +5V
+24V
4
Composite power
supply PCB
Q90O
H Scanning lamp Fixing...
Service Manual - Page 68
... copy images caused by changes in the transfer efficiency, the copier corrects the level of the following three types; The transfer roller bias may be either of transfer bias application. b. c.
CANON PC720/...• during initial rotation after the Copy Start key is pressed.
• while the scanner is pressed to the transfer
bias of a jam. Transfer Bias This bias corresponds to ...
Service Manual - Page 76
... Pre-registration roller paper sensor
PS7 Singlefeeder paper sensor 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 a single-cassette path or a multifeeder path. The copier is discharged to the copy tray. it is...
Service Manual - Page 91
...min or more , copying operation is stopped after you turned off . If you have turned on . CANON PC720/740/7501770 REV.() ...copy; Once changed, the distance between sheets of paper is increased (12 to 8 cpm), thereby decreasing the supply power to the fixing heater to prevent overheating at the
end of the copier's fixing heater
is equipped with a sub thermistor (TH2) to check for problems...
Service Manual - Page 95
... 3 sec, and indicates the Add Paper 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, and it...
Service Manual - Page 96
CANON PC720/74017501/70 REV.O AUG.1994 PRINTEDIN JAPAN (MPRIME AU JAPON)
IMMA OPERATIONS AND TIMING
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 1.5 sec
Figure 3-422 (no paper)
Copy Start key ON
STBY
INTR
SCFW
Pick-up clutch solenoid (SL1) Jam check...
Service Manual - Page 98
...
3 - 58
COPYRIGHT 1994 CANONINC. CANON PC720/740R501770REV.OAUG.1994 PRINTEDIN JAPANDMPRIMEAUJAPON) Delivery Stationary Jam If copy paper does not reach the delivery sensor within a specific period of time because of
a feeding problem, the copier identifies a delivery delay jam, stops copying operation, and flashes the Jam message.
Pick-Up Stationary Jam If copy paper does not move past the...
Service Manual - Page 105
...cartridge in the copier. 2) Set the density correction switch
(SW101) to the center notch.
0
SW101 Figure 3-701
3) Turn off the AE mechanism, and set the copy density adjusting lever to the center notch.
4) Place the Test Chart (NB-3, NA-2, NA-3) on the copyboard, and make copies... the intensity of the scanning lamp
whenever you have replaced any of the following parts:
• DC controller...
Service Manual - Page 111
... Thermistor (TH1, TH2; faulty)
U.LILOLI • Fixing heater (H1;
CANON PC720/7401750I770 REVD AUG.1994 PRINTED IN JAPAN (imPRimt AU JAPON)
3 - 71 SELF DIAGNOSIS
The copier's DC controller PCB is being corrected for displacement.
In...fails to reach 65°C 1.5 sec after a press on the Copy Start key.
• The thermistor (TH1) temperature fails to reach 150°C in 4 sec after a...
Service Manual - Page 145
use paper, lint-free or others, to avoid damage to the developing ...problems; B.
Rotating it rotates when making copies. COPYRIGHT © 1994 CANON INC.
Figure 4-503
Caution:
Do not touch the roller surface; Removing the Transfer Charging Roller
1) Open the copier's top unit.
2) Remove the screw T.
1) Open the copier's top body, and remove the cartridge.
2) Put the cartridge...
Service Manual - Page 156
... cartridge on the copier's top
f
unit to close.
12 Connect the power cord to the power cord connector.
--------1
------„, 0
13 Connect the power plug to the power • Make sure that the correct ratio is indicated, and press the Copy Count/Zoom key to make sure that 'Yo' is indicated.
5 - 4
COPYRIGHT © 1994 CANONINC. CANON PC720...
Service Manual - Page 163
... no part that must be replaced on a periodical basis. II.
III. COPYRIGHT © 1994 CANON INC.
CANON PC720/140R50M0 REU AUG.1994 PRINTEDIN JAPAN oMPRIME AU JAPON)
6 - 1 MAINTENANCE AND SERVICINGMI
PERIODICALLY REPLACED PARTS
The copier does not have a part classified as a durable or consumable part. DURABLES AND CONSUMABLES
The copier does not have a part to...
Service Manual - Page 165
...cartridge. f. The photosensitive drum is susceptible
to even out the toner inside ...cartridge on the copies as toner runs out, hold the cartridge level as 10,000 to a level that will not cause any practical problems...
Handling a. Before setting the cartridge to the copier
or if white spots appear ...
1. Work quickly when removing jams or replacing the cartridge.
2.
however, take all ...
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