Canon PC720 Support Question
Canon PC720 Support Question
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Question posted by ebwin1 on April 16th, 2014
Cannon Pc 720 Copier
i have an old pc720 copier not used very often when i turn it on (E2) appeares in the led can you tell me what the problem is i do not have an owners manuel my daughter uses it making copies for school
Current Answers
Related Canon PC720 Manual Pages
Service Manual - Page 3
... figures about the plain paper copier PC720/740/750/770, and is compiled to serve as necessary to cover major changes. CHAPTER 3 "OPERATIONS AND TIMING" explains how the copier's electrical and mechanical systems are related to each step. a Service Information Bulletin will be thoroughly familiar with respect to make for the following chapters: In...
Service Manual - Page 19
...Clear/Stop key; open the top unit. (The power turns off the power.
1.1 Using Transparencies (PC720/740) 1) Shift the delivery guide plate on the copy
tray upright. MIN. 70% (Inch- A4/LTR
B5...1 - 11 After copying operation is over, the
auto power-off mechanism becomes activated if the copier is left alone for about 5 min without further key operation, automatically turning off when the top...
Service Manual - Page 23
... off, and
the copier will make the remaining number of copies. CI The 'P' indication...PC720/T401759/770 REV.O AUG.1994 PRINTEDIN JAPANRout AU JAPONI
1 - 15 Removing Jams
The Jam indicator flashes to the following :
C) Open the right door, and check if
there is copy... the stack back in order, and set copy
paper. Adding Paper
The Add Paper indictor 'P' turns on the multifeeder. 1) Check if paper...
Service Manual - Page 26
... not make copies until the cassette pick-up the open/close lever to be removed, wipe it with a cloth moistened with mild detergent solution, and dry wipe it with alcohol or water* while rotating the roller in density adjustment mode (AE or manual), you may switch among three copy density settings using the Density...
Service Manual - Page 31
Outline
The copier uses a direct charging/transfer system with each component block arranged as shown in Figure 2-101.
/7
7/
7/
7/
7/ + ... JAPAN OMPRIME AU JAPONI
2 - 1 Drum cleaning
(3. IMAGE FORMATION
A. Transfer 5. Fixing
4. Separation
Registration
: Flow of copy paper
(Cassette/manual feed)
: Rotation of photosensitive drum
Figure 2-102
COPYRIGHT © t994 CANON INC...
Service Manual - Page 33
CANON PC720/740/150M0 REV.O AUG.1994 PRINTED IN JAPAN pmplatt AU JAPON)
2 - 3
COPYRIGHT © 1994 CANON INC. The...formation of the original is applied to the roller in addition to neutralize the charges in preparation for pre-exposure. The copier uses its primary charging roller to maintain primary potential. The DC bias applied simultaneously with the AC bias, on the other hand...
Service Manual - Page 35
... toner from the surface of a jam or the like.
The copier uses a roller transfer system, which has the following advantages when compared with an increased tendency toward fog- COPYRIGHT 1994 CANON INC. A DC bias affects copy density and the
degree of fogging; The copier turns the transfer voltage to positive during initial rotation, while the...
Service Manual - Page 36
...
G. Separation (step 5)
H. Pressure roller
Copy paper
Figure 2-113
After transfer, the toner image is separated from the photosensitive drum using the rigidity of the fixing heater and serves to make sure that melting toner will not stick to a specific temperature.
2 - 6
COPYRIGHT © 1994 CANON INC.
To prevent such a problem, the copier applies a positive voltage to...
Service Manual - Page 42
... 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 heater... stored in advance and generates signals used to drive such loads as motors, solenoids, and lamps. Electrical Circuitry
The copier's major electrical control mechanisms are driven...
Service Manual - Page 63
... a specific
voltage by the oscillation/amplitude control circuit. Switching the DC Bias Voltage Level The copier switches the level of voltage taken.
The DC bias voltage is controlled to the DC bias ... based on the DC/AC bias. Turning On and Off the DC/AC Bias
When the Copy Start key is controlled to maintain the AC bias current constant. c. CANON PC720/740/750/770 REV.O AUG.1994 ...
Service Manual - Page 68
...copier uses a direct charging method, and could allow adhesion of toner to determine the correction value.
Reference Bias (ATVC) Changes in the transfer efficiency, the copier corrects the level of a conventional copier... Copy Start key is pressed.
• while the scanner is moving from the conventional copiers that... such toner, the copier applies a positive voltage at a...
Service Manual - Page 76
... 3-401a (PC720/740)
PS7 Singlefeeder pick-up roller
Cassette pick-up system consists of a single-cassette path or a multifeeder path.
the pick-up roller
Holding plate
3 - 36
COPYRIGHT 1994 CANONINC. No. it is moved while centered along the pick-up/feeding path; Outline
The copier uses center reference feeding, in which copy paper is...
Service Manual - Page 78
...pick-up roller. this way, the drive is rotating.
The registration roller, in turn, serves to the pick-up roller. Outline The construction of the copier's pick-up
roller differs depending on while the main motor is picked up and ... spring clutch, control ring, and pick-up roller starts to rotate, copy paper is rotating. The PC720/740's pick-up roller consists
of drive transmission;
Service Manual - Page 91
... is turned off while 'E000' through `E003' is indicated on the control panel, 'EU will be indicated on the control panel if the power switch is detected during copying operation, the copier once ...problems associated with a sub thermistor (TH2) to turn itself off the power to the fixing film otherwise caused by overcurrent occurring in the display of A4 or small- The 'H' indication turns...
Service Manual - Page 98
... the registration sensor because of
a feeding problem, the copier identifies a delivery stationary jam, stops copying operation, and flashes the Jam message. SCFW
SCRV
SCFW
SCRV
SCFW
Jam check Delivery sensor (PS4) Main motor (WI)
4.3 sec
I. 4.3 sec II 4 Normal I
Figure 3-428
Jam sec
3 - 58
COPYRIGHT 1994 CANONINC. CANON PC720/740R501770REV.OAUG.1994 PRINTEDIN JAPANDMPRIMEAUJAPON...
Service Manual - Page 101
... ±12.5% However, the above values apply on error codes (E000, E001, E002, E003), the copier uses the capacitor (C123) located within the DC controller circuit.
Caution:
The back-up data on the condition... is cut; The copier's power switch is a soft switch, and the copier is turned off . When the power switch is equipped with the DC controller PCB. CANON PC720/14017501770 REVD AUG. ...
Service Manual - Page 105
... 1) Set the black 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.
5) Turn VR101 on the DC controller PCB...
Service Manual - Page 111
...
The copier's DC controller PCB is equipped with `E000', `E001', 'E002', or 'E003' has occurred.
faulty)
U.LILOLI • Fixing heater (H1; CANON PC720/7401750I770 REVD AUG.1994 PRINTED IN JAPAN (imPRimt AU JAPON)
3 - 71 OPERATIONS AND TIMINGIMII
VIII. faulty) • Thermal fuse (FU1;
In the case of the machine (sensors in the copy...
Service Manual - Page 117
...
•
1. Covers that may be detached by mere removal of the machine. CANON PC720/7401150/770 REVD AUG.1994 PRINTED IN JAPAN pmPRiut AU JAPAN)
4 - 1
T Upper...1994 CANON INC.
MECHANICAL SYSTEMINN
I. Removing the Upper Cover
1) Remove the copyboard cover.
•
2) Open the copier's top unit.
0
0
3) Remove the two screws 3, and remove
the front upper cover ®. EXTERNALS
...
Service Manual - Page 145
... 1500 lux (general lighting) for 5 min, it rotates when making copies. Rotating it in a dark place for 5 min and left alone thereafter in the opposite direction will not cause any practical problems;
however, take care not to a level that will displace the leaf spring used to apply a developing bias to 30,000 lux.)
O
Figure...
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