Canon GP-160, GP-160F, GP-160DF Service Handbook

REVISION 0
COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
FEB. 1999
FY8-23B3-000
GP160F/160DF/160
COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
COPYRIGHT © 1999 CANON INC.
Printed in Japan
Imprimé au Japon
Use of this manual should be strictly supervised to avoid disclosure of confi­dential information.
IMPORTANT
THIS DOCUMENTATION IS PUBLISHED BY CANON INC., JAPAN, TO SERVE AS A SOURCE OF REFERENCE FOR WORK IN THE FIELD.
SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARY SLIGHTLY FROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING AND OTHER PRINTEDMAT­TER.
ANY QUESTIONS REGARDING INFORMATION CONTAINED HEREIN SHOULD BE DIRECTED TO THE COPIER SERVICE DEPARTMENT OF THE SALES COMPANY.
THIS DOCUMENTATION IS INTENDED FOR ALL SALES AREAS, AND MAY CONTAIN INFORMATION NOT APPLICABLE TO CERTAIN AREAS.
Prepared by
OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPARTMENT 3
OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIVISION
CANON INC.
5-1, Hakusan 7-chome, Toride-shi, Ibaraki 302-8501 Japan
i

CONTENTS

CHAPTER 1 MAINTENANCE AND SERVICING
A. Main Unit......................................1-1
1. Periodic replacement parts .....1-1
2. Estimated lifespan of
consumable parts ....................1-1
B. ADF..............................................1-2
1. Periodic replacement parts .....1-2
2. Consumables replacement
targets .....................................1-2
C. Basic servicing procedures..........1-3
D. Car tridge storage and handling....1-4
1. Storage when the packing
seal is intact ............................1-4
2. Storage and handling when the packing seal has been
opened ....................................1-5
CHAPTER 2 STANDARDS AND ADJUSTMENTS
A. Mechanical system.......................2-1
1. Right and left registration
adjustment...............................2-1
2. Image leading edge margin
adjustment...............................2-2
3. Attaching the scanner wire......2-2
4. Mirror positioning adjustment..2-3
5. Printer unit receptacle connector mount positioning
adjustment...............................2-6
6. Check the pressure (nip width)
of the fixing pressure roller .....2-6
B. Electrical System..........................2-8
1. Automatic shading
adjustment...............................2-8
2. Image positioning
adjustment...............................2-8
3. Sensor check ........................2-11
4. Image processor PCB
replacement procedures .......2-13
C. ADF height adjustment...............2-14
1. Height check .........................2-14
2. Height adjustment.................2-15
D. Skew feed adjustment................2-16
1. Checking ADF skew feed......2-16
2. Adjusting skew feed ..............2-17
E. Adjusting image position............2-18
1. Checking image position.......2-18
2. Adjusting image position.......2-21
1
2
3
4
5
CHAPTER 3 ARRANGEMENT AND FUNCTIONS
OF ELECTRICAL PARTS
A. Clutches, solenoids......................3-2
B. Motor, fan .....................................3-4
C. Sensors........................................3-6
D. Switches, lamps, miscellaneous...3-8
E. PCBs..........................................3-10
F. Variable resistor (VR)/LED/check
pin listed by PCB plate ...............3-12
1. Image processor PCB...........3-13
2. DC controller PCB/Sensor
PCB.......................................3-14
3. Feeder controller PCB
(Cassette feeder) ..................3-16
4. Modem board........................3-17
5. NCU board............................3-18
6. ADF.......................................3-19
ii
A. User errors ...................................5-1 B. Service errors...............................5-8
CHAPTER 4 SERVICE MODE
A. Overview ......................................4-1
B. Operating Procedures..................4-2
C. Service mode menu list................4-3
D. SSSW Default Setting..................4-9
E. Parameter settings.....................4-24
1. SSSW settings......................4-24
2. Menu switch settings
(#2 MENU)............................4-42
3. Numeric settings by type
(#3 NUMERIC Param.) .........4-44
4. Special settings
(#4A SPECIAL).....................4-47
5. Country type setting
(#5 TYPE)..............................4-49
6. Document scanning function
setting (#6 SCANNER) .........4-49
7. Printer parameter settings
(#7 PRINTER).......................4-50
8. Initialization of setting values
(#8 CLEAR) ...........................4-54
9. ROM information display
(#9 ROM) ..............................4-55
10.CS SET (mirror mount
initialization setting) ...............4-55
E. Test Mode (TEST MODE)..........4-56
1. Overview ...............................4-56
2. Test Mode menu....................4-57
3. D-RAM test <1:DRAM>.........4-64
4. CCD test <2:CCD TEST>.....4-65
5. PRINT test <3:PRINT> .........4-65
6. MODEM NCU test
<4:MODEM NCU> ................4-67
7. AGING test
<5:AGING TEST> .................4-71
8. FACULTY test
<6:FACULTY TEST> .............4-71
9. BOOK scanning test
<8:BOOK TEST>...................4-86
CHAPTER 5 SELF DIAGNOSIS
APPENDIX
A. GENERAL TIMING CHART.........A-1
B. SIGNALS AND
ABBREVIATIONS ........................A-3
C. GENERAL CIRCUIT DIAGRAM ..A-5
1. Image processor PCB ............A-5
2. DC controller PCB ..................A-8
3. Cassette Feader...................A-10
4. ADF.......................................A-11
D. SPECIFICATIONS .....................A-13
1. Type ......................................A-13
2. Method..................................A-13
3. Functions ..............................A-14
4. Other.....................................A-15
5. Copy speed...........................A-16
6. Communication section ........A-17
7. Scanning system ..................A-18
8. Recording system.................A-18
9. Memory.................................A-18
10.Transmission functions .........A-19
11.Dialing...................................A-19
12.Reception functions ..............A-20
13.Activity management
function .................................A-21
CHAPTER 1 MAINTENANCE AND SERVICING
1-1
CHAPTER 1 MAINTENANCE AND SERVICING

A. Main Unit

1. Periodic replacement parts
There are no parts in the unit that need to be periodically replaced.
2. Estimated lifespan of consumable parts
It may be necessary to replace parts due to wear or damage more than once during the warranty period.The expected life (number of pages) of parts that do not need to be replaced until they fail is indicated below.
As of January, 1999
*1 A total of 4, including the main unit and a single level cassette feeder
A total of 8, including the main unit and a three-level cassette feeder
*2 A total of 4, including the main unit and a single level cassette feeder (2 separa-
tion rollers and 2 transport rollers) A total of 8, including the main unit and a three-level cassette feeder (4 separa­tion rollers and 4 transport rollers)
Table 1-1
no.
1 2
3 4
5
6
7
Part Name
Fixing assembly Transfer corona
assembly roller Paper feed roller Separation roller,
transport roller Multi-feeder paper
feed roller Multi-feeder separa-
tion pad Exhaust fan
Part No.
FG6-1259-000 RG5-3527-000
RB2-1821-000
RF5-2490-000
RB2-1820-000
RF5-2400-000
RH7-1354-000
Number of
parts
1 1
2*
1
1 each *
2
1
1
1
Estimated Number
of Pages Copied
150,000 150,000
200,000 200,000
200,000
200,000
25,000 hours
Remarks
25,000 hours is 3 years of 24-hour con­tinuous power supply
The information in the table above is only an estimate, and may be revised in the light of empirical data.
Caution:
1
CHAPTER 1 MAINTENANCE AND SERVICING
1-2

B. ADF

1. Periodic replacement parts
There are no parts in the unit that need to be periodically replaced.
2. Consumables replacement targets
These parts may require replacement once or more during the warranty period due to deterioration or damage. The expected life (number of pages) of parts that do not need to be replaced until they fail is indicated below.
As of January, 1999
Table 1-2
No.
1
2 3
Part Name
Pick-up roller/ separation roller
Friction bar Stamp unit
Part No.
HG5-1652-000
FG6-1303-000 HH7-2206-000
Quantity
1
1 1
Expected life span
50,000 sheets
50,000 sheets
100,000 sheets
Remarks
The information in the table above is not unit counter data but the actual number of sheets.It is only an estimate, and may be revised in the light of empirical data.
Caution:
CHAPTER 1 MAINTENANCE AND SERVICING
1-3

C. Basic servicing procedures

This product has no areas which require periodic service. However, in order to extend the life of the product and par ts, we recommend the following procedures be car­ried out when carrying out service to replace consumable parts.
Table 1-3
No.
1
2
3
4
5
6
7
8 9
Procedure
Greet the customer
Test copy
Clean the optical unit
Clean the transfer guide
Clean the separation and transport parts
• Separation static charge eliminator
• Transport belt
Clean the fixing and deliv­ery assemblies
• Fixing assembly inlet guide
Clean the copy board glass
Make a test copy Tidy up around the unit
Inspection Items
Consult about the machine’s condition
a. Image density b.Soiled background c. Character clarity d.Leading edge margin e.Fixing, faulty synchro-
nization, soiled reverse side
Remarks
Clean with a blower brush. When very soiled, use an alcohol cleaner.Wipe the white reference plate with a dry cloth.
Remove the cartridge before servicing.
CHAPTER 1 MAINTENANCE AND SERVICING
1-4

D. Cartridge storage and handling

Cartridges are constantly influenced by the surrounding environment whether the packaging is sealed or opened, or the cartridge is installed in the main unit. The car­tridge will deteriorate over time regardless of the number of pages copied.The pace of this deterioration over time depends on the installed and storage environments. Please take sufficient care when storing and handling the cartridge.
1. Storage when the packing seal is intact
When cartridges are stored in a warehouse or workshop, do not place them in loca­tions other than those listed in Table 1-4.Also, take heed of the following points.
• Do not store in direct sunlight.
• Do not store in a location subject to strong vibrations.
• Do not handle roughly or drop.
Table 1-4 Temperature and humidity conditions for storage
The total warranty period is the period effective from the date of manufacture printed on the cartridge packing box.
Caution:
Normal (90% of the total storage period)
Extreme (10% of the total storage period)
Temperature
Temperature variation
(within a 3-minute span)
Normal (90% of the total storage period)
Extreme (10% of the total
Humidity
storage period)
Atmospheric pressure
Total warranty period
Maximum temp.
Minimum temp.
Maximum humidity
Minimum humidity
0 to 35˚C
35 to 40˚C
-20 to 0˚C
40˚C to 15˚C
-20˚C to 25˚C
35 to 85%
relative humidity (RH)
85 to 95% RH 10 to 35% RH
460 to760mmHg (0.1 to 1 atmospheric pressure)
About 2.5 years
CHAPTER 1 MAINTENANCE AND SERVICING
1-5
2. Storage and handling when the packing seal has been opened
The photosensitive drum uses an organic photoconductor (OPC).The photosensitive drum will deteriorate if exposed to strong light. Also, the cartridge contains toner, so please provide customers with adequate explanations of storage and handling methods, and advise them to always store the cartridge in a storage bag.
a. Storage environment after the packing seal has been opened a) Always store in the storage bag.
b) Do not store in direct sunlight, near a window or other bright places. Do not store in
an automobile for long periods of time. Even when the cartridge is in the storage bag, do not leave it for long periods in direct sunlight or in an automobile.
c) Do not store in extremely high or low temperatures or humidity, or in a location which
experiences dramatic changes in temperature or humidity. (For example, next to a heater or air conditioner.)
d) Do not store in a location exposed to corrosive gases (insecticides, etc.) or in a loca-
tion with air that has a high salt content.
e) Do not store in a location that is very dusty or filled with ammonia or organic solvent
fumes.
f) Do not store near computer monitors, disk drives or floppy disks. (The magnetism of
the cartridge may damage the data stored in these devices.) g) Store out of reach of children and infants. h) Store the cartridge between 0 to 35°C.
b. Cartridge shelf life
The shelf life of a cartridge is 2.5 years from the date of manufacture.The production date is displayed in abbreviated form on the cartridge. Also, for customer use, the expi­ration date , 2.5 years from the date of manufacture, is displayed on the cartridge pack­ing box and on the main packing box. It is preferable to use up the car tridge before the expiration date, because after that date the cartridge image quality deteriorates.
CHAPTER 1 MAINTENANCE AND SERVICING
1-6
c. Handling a) When setting the cartridge in the copier, or when blank areas occur in the copy
image because toner runs out during copying, hold the cartridge level, as shown in figure 1-1, and shake it several times at about 90Þ in both directions. After the toner inside the cartridge has been leveled evenly, set the cartridge in the copier. If the cartridge is shaken in a manner other than that described above, there is the danger that toner may leak from the developing assembly and cleaning assembly.
Figure 1-1
In order to completely prevent output image stains due to toner leakage, be sure to make 3-5 test copies after setting the cartridge in the copier.
b) As shown in Figure 1-2, do not hold the cartridge vertically or upside down. Also, do
not wave it about.
Figure 1-2
CHAPTER 1 MAINTENANCE AND SERVICING
1-7
c) Do not manually open the shutter of the photosensitive drum on the bottom of the
cartridge. Do not touch the surface of the photosensitive drum.
d) Do not disassemble the cartridge. e) Do not subject to unnecessary vibration or shock.
Particularly, do not subject the photosensitive drum to pressure from the top of the photosensitive drum cover shutter.
f) When transporting the copier, remove the cartridge from the main unit. Place the
cartridge in the protective bag or wrap in a thick cloth and keep out of direct light.
g) Do not store near computer monitors, disk drives or floppy disks. (The magnetism of
the cartridge may damage the data stored in these devices.) h) Store out of reach of children and infants. i) The photosensitive drum is sensitive to strong light, so the cartridge is equipped with
a light-blocking shutter. However, if subjected to strong light for an extended period
of time, white spots and vertical bands may appear on the images. In that case,
refraining from use of the machine for as long as possible will result in almost com-
plete recovery. However, in some cases the traces (white spots, vertical bands) may
not disappear.
Please note the following items.
j) Instruct the user to return used cartridges to a designated collection center.
If the surface of the photosensitive drum is accidentally soiled, wipe with a polishing cloth dampened with toner.Do not wipe with a dry cloth or clean with solvents.
Caution:
1. Perform jam removal and cartridge replacement promptly.
2.When the cartridge is removed from the copier and stored, or when using a color cartridge, be sure to place the cartridge in a storage box or cover it with a cloth.Do not leave the cartridge exposed, once removed from the main unit.
Caution:
CHAPTER 1 MAINTENANCE AND SERVICING
1-8
Reference:
The cartridge will perfectly fit for use for copying if placed in darkness for 5 minutes after exposure to 1,500lux intensity light (normal light) for 5 minutes,. However, do not expose the cartridge to direct sunlight. The sun’s rays have a light intensity ranging from approximately 10,000lux to 30,000lux.
Do not incinerate used cartridges as there is a risk of bursting or explosion. When a used cartridge must be disposed of, dispose of it as nonflammable trash.
Caution:
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-1
CHAPTER 2 STANDARDS AND ADJUSTMENTS

A. Mechanical system

1. Right and left registration adjustment
Check that the front edge image margin of paper fed from each cassette is 2.5
± 2.0mm.
If the standards are off, adjust according to the procedure described below.
1) Remove the cassette from the cassette level that needs adjustment.
2) Loosen the hex screw and move the adjusting plate back and for th. Adjust by lining up with the 1mm interval scale marks.
Figure 2-1
2
(–) (+)
Hex wrench
Scale
1mm
2.5 ± 2.0mm
0 2
4 6
8
10
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-2
2. Image leading edge margin adjustment
Adjustment when the leading edge of the printed image is out of alignment. a) Use a precision screwdriver to press down on SW401 and output a test print. b) Turn VR401 and adjust the leading edge margin of the test print to 4.0 ± 2.0mm.
Figure 2-2
3. Attaching the scanner wire
Attach the wire, following steps 1 to 9. Then perform the mirror positioning adjust­ment described on the next page.
Figure 2-3
SW401
VR401
4.0 ± 2.0mm
VR401
Precision screwdriver (3mm)
Pulley clip
[4]
[2]
[1]
Attach the mirror positioning plate.
[3]
Put the steel ball into the pulley hole. Wrap the wire 2 times to the inner side and 7 times to the outer side. Then, attach the pulley clip.
[2]
[5]
[6]
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-3
4. Mirror positioning adjustment
a) Adjusting position of No.2 mirror mount
If the optical section wire pulley’s hexagonal fixing nut has been loosened, follow the procedures described below to adjust the position of the No. 2 mirror mount, and then tighten the hexagonal nut.
Figure 2-4
The mirror positioning tool used in the positioning of the No. 2 mirror mount is illus­trated below.
Figure 2-5
Optical section wire pulley
Hexagonal nut
[C]
[A]
[B]
[C]
[3]
[2]
[1]
FY9-3009-040 (for rear use)
[C]
[B]
[A]
[A]
[B]
[3]
[2]
[1]
When used to adjust the No. 2 mirror mount (for rear use)
[C]
[B]
[3]
[2]
[1]
FY9-3009-040 (for front use)
[2]
[1]
When used to adjust the No. 2 mirror mount (for front use)
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-4
With the mirror positioning tool fitted in the holes shown below, tighten the optical
unit wire pulley’s hexagonal fixing nut.
Figure 2-6
b) Adjustment of distance between No.1 and No.2 mirror mounts
With the optical system wire fixing tool for No. 1 mirror mount loosened, follow the procedures described below to adjust the distance between No. 1 and No. 2 mirror mounts, and then tighten the fixing tool.
This adjustment should be performed after the operation to adjust the position of No. 2 mirror mount, as described above.
Figure 2-7
for rear use
for front use
Screw
Screw
Fixing tool
Fixing tool
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-5
The mirror positioning tool used in the adjustment of the distance between No.1 and
No.2 mirror mounts is illustrated below.
Figure 2-8
With the mirror positioning tool fitted in the holes shown below, attach the optical unit
wire hexagonal fixing tool.
Figure 2-9
[C]
[B]
[A]
[C]
[3]
[2]
[1]
FY9-3009-040 (for rear use)
[C]
[B]
[A]
[A]
[B]
[3]
[2]
[1]
When used to adjust the distance between No. 1 and No. 2 mirror mounts (for rear use)
[A]
[B]
[3]
[3]
[2]
[1]
FY9-3009-040 (for front use)
When used to adjust the distance between No. 1 and No. 2 mirror mounts (for front use)
[1]
for rear use
for front use
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-6
5. Printer unit receptacle connector mount positioning adjustment
When the printer unit receptacle connector is removed or attached, adjust the mount position, following the procedure described below.
1) Loosen the 3 receptacle connector screws.
2) Adjust so that the interval between the printer unit frame and the receptacle connec-
tor is 3.5 ± 0.5mm.
Figure 2-10
6. Check the pressure (nip width) of the fixing pressure roller
This machine has no adjustment mechanism for the fixing assembly nip width. However, if the nip width is not correct, faulty fixing may occur.
Therefore, check the fixing assembly nip width by following the procedures described below. If the nip width is outside the standards, replace the fixing assembly.
1) Make one solid black copy on size A3 paper.
2) Place the black side of the paper face down and set the solid black copy in the multi-
feeder.
3) When the leading edge of the paper comes out into the copy tray, quickly switch off
the power source and leave it as is for about 10 seconds.
4) Remove the paper as you would to clear a paper jam from the printer unit.
5) Measure the width of the part of the removed paper that is wet and shiny with toner.
Check that the width is within the range displayed in Table 2-1.
Printer unit
3.5 ± 0.5mm
Screws
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-7
Figure 2-11
Table 2-1
Direction of paper feed
c
15mm
Center of A3 size printer paper
15mm
a
a
| c - a |
| b - a |
| b - c |
Dimensions
5.5 ± 1.0 (mm)
1.0 (mm) or less
1.0 (mm) or less
1.0 (mm) or less
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-8

B. Electrical System

Adjustment items for the electrical system include automatic shading correction and image positioning adjustment. When the main parts listed for each below are replaced, perform adjustments.
• When the scanning lamp is replaced: automatic shading adjustment
• When the CCD unit is replaced: automatic shading adjustment
• When the image processor circuit board is replaced: image positioning adjustment, automatic shading adjustment
1. Automatic shading adjustment
1) Open the 3 covers of the control panel’s one-touch panel.Set the slide switch ON
2) Enter the service mode and select TEST MODE.(See page 4-56)
3) Press 2 on the control panel’s numeric keypad. (TEST MODE”: CCD will be select­ed.)
4) When you press 8 on the numeric keypad, automatic shading adjustment will start.
5) When OK is displayed on the display, the adjustment is finished.
6) After pressing the control panel stop key, press the clear key. (To exit TEST MODE.)
7) Turn the control panel slide switch OFF.
2. Image positioning adjustment
1) Make a test chart with marks every 1cm from the leading and left edges of the page, as shown in the figure below.
Figure 2-12
Leading edge
10mm
Mark a line
A4 size copy paper
Left edge
10mm
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-9
2) Select 9.BOOK from service mode #6 SCANNER. Set 1 in 018.
3) Set the test chart you made on the copyboard glass with the image facing down.
Figure 2-13
4) Copy the image enlarged to 400%.
5) Measure the length of the leading and left edges of the copied image (see the figure below).
Figure 2-14
6) Refer to Table 2-2. Work out the input value that corresponds to the measurement taken in step 5.
7) Select 8. CCD from service mode #6 SCANNER. Enter the value worked out from the leading edge data, 007, and the left edge data, 010 in step 6).
8) Select 9.BOOK from service mode #6 SCANNER. Set 0 in 018.
9) Exit service mode. Copy the image at 100%. Check that the copied image and the original document positioning matches.
Left edge
Leading edge
10mm
10mm
CARD
(Image facing down)
A5
B5
A5
A4
B5 B4
A4
CARD
Document
A4
A3B4A4B5A5A3B5A5
Leading edge
Left edge
Output image (400% enlarged copy)
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-10
Actual measurement: value of markings on image enlarged to 400% Input measurement: value input in service mode.
Table 2-2
Feed direction (leading edge)
Actual measurement Input measurement
30.0 41
31.0 40
32.0 39
33.0 38
34.0 37
35.0 36
36.0 35
37.0 34
38.0 33
39.0 32
40.0 31
41.0 30
42.0 29
43.0 28
44.0 27
45.0 26
46.0 25
47.0 24
48.0 23
49.0 22
50.0 21
Main scanning direction (left edge)
Actual measurement Input measurement Actual measurement Input measurement
30.0 118 40.2 158
30.3 119 40.4 159
30.5 120 40.7 160
30.8 121 40.9 161
31.0 122 41.2 162
31.3 123 41.4 163
31.5 124 41.7 164
31.8 125 41.9 165
32.0 126 42.2 166
32.3 127 42.4 167
32.5 128 42.7 168
32.8 129 43.0 169
33.0 130 43.2 170
33.3 131 43.5 171
33.6 132 43.7 172
33.8 133 44.0 173
34.1 134 44.2 174
34.3 135 44.5 175
34.6 136 44.7 176
34.8 137 45.0 177
35.1 138 45.2 178
35.3 139 45.5 179
35.6 140 45.7 180
35.8 141 46.0 181
36.1 142 46.3 182
36.4 143 46.5 183
36.6 144 46.8 184
36.9 145 47.0 185
37.1 146 47.3 186
37.4 147 47.5 187
37.6 148 47.8 188
37.9 149 48.0 189
38.1 150 48.3 190
38.4 151 48.5 191
38.6 152 48.8 192
38.9 153 49.1 193
39.1 154 49.3 194
39.4 155 49.6 195
39.7 156 49.8 196
39.9 157 50.0 197
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-11
3. Sensor check
Assessment of the status of the photo-interrupter is performed by the SENSOR test
in the TEST MODE.The procedure is as described below.
1) On the control panel, press the Entry/Setting key, then the # key to enter the service mode.
2) Press the shift keys (up arrow, down arrow) to select TEST MODE.
3) Press 6 on the numeric keypad to select FACULTY TEST.
4) Press 3 on the numeric keypad to enter sensor check mode. The image below will be displayed.
Figure 2-15
5) When the display shown in Figure 2-15 is displayed, push 1,2,3 and 4 on the numer­ic keypad.The status of each sensor will be displayed.The following is an example and explanation of what happens when you push 1 on the numeric keypad.
Figure 2-16
6) Move each sensor’s flag and verify that the display shows of (OFF)/on (ON) repeat­edly. The following page shows the display and sensor name, and the status of each sen­sor when the main unit is in stand-by when keys 1-4 of the numeric keypad are pressed.
6-3 : SENSOR
[1] --- [7]
Sensor name
Sensor’s present status
DS of DES of DOC A4 CRG on DCVS on
Sensor’s present status
Sensor name
DS of means that the automatic document feeder’s (ADF) document sensor (DS) is off.
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-12
Figure 2-17
6-3:SENOR [1] - - - [7]
Press 1 on the numeric keypad
DS of DES of DOC A4 CRG on DCVS on
DS: document sensor* (PS801) :on/document present, off/no document DES: document edge sensor* (PS805):on/document present, off/no document DOC: document width sensor* (PS851, PS852): displays document width by combination of
the 2 sensor’s ON/OFF status CRG: toner cartridge sensor: on/of toner cartridge present/no toner cartridge DCVS: paper feed sensor: on/ paper is not detected (in stand-by, with the lower right cover closed)
*Displays the status of each ADF sensor
Press 2 on the numeric keypad
of/ paper is detected (in stand-by, with the lower right cover open)
HPS on RES on BCVS of NDFS of DLS0 of DLS1 of
HPS: scanner home position sensor: on/the scanner is in the home position RES: Not used
BCVS: copyboard cover open/close sensor (PS102): on/cover open, of/cover closed NDFS: document length sensor1* (PS802): on/document present, of/no document DLS0: document length sensor2* (PS803): on/document present, of/no document DLS1: Reserved *Displays the status of each ADF sensor
Press 3 on the numeric keypad
of/ the scanner is not in the home position
CT1 on A4 CT2 of CT3 on A4 CT4 on B4
CT1: main unit cassette paper sensor (PS305): on/paper present, of/no paper
main unit cassette paper size detection switch: displays paper size
CT2: level 1 cassette feeder paper sensor (PS651): on/paper present, of/no paper
level 1 cassette feeder paper size detection switch: displays paper size
CT3: level 2 cassette feeder paper sensor (PS651): on/paper present, of/no paper
level 2 cassette feeder paper size detection switch: displays paper size
CT4: level 3 cassette feeder paper sensor (PS651): on/paper present, of/no paper
level 3 cassette feeder paper size detection switch: displays paper size
Press 4 on the numeric keypad
MLT on A4 TN on RS of JAM of
MLT: multi-feeder paper sensor (PS501): on/paper present, of/no paper
Displays A4/set paper size. TN: toner sensor: on/toner remaining, of/no toner RS: Reserved JAM: jam detection status: on/jam detected, of/no jam detected
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-13
4. Image processor PCB replacement procedures
The procedures which must be performed when replacing the image processor PCB
are described below.
Procedures performed at the time of replacement
• For machines with a FAX function, output system data list, one-touch/speed dial/group dialing list, user data list, activity management report and system dump list.
• For machines with a FAX function, output all transmitted and received images.
• Turn off the power switch and remove jumper plug (JP3) before replacing the PCB.
• If additional memory has been added, remove the memory after removing jumper plug JP1 from the image processor PCB.
• Remove the ROM DIMM.
Procedures performed after replacement
• Install ROM DIMM.
• Install additional memory. When installing additional memory, do it when the jumper plug (JP1) is removed from the image processor PCB, or when it is in the OFF position.
• Set jumper plug JP1 to the ON position.
• Attach the jumper plug (JP3) that was removed prior to replacement of the PCB.
• Turn on the main unit power switch. If DATA ERROR is displayed, press the set key on the control panel.
• Input the user data and service mode data.
• See page 2-8. Perform automatic shading correction and image positioning adjust­ment.
When the jumper plug (JP3) is removed, all the data recorded in the control memory are erased. Accordingly, when the jumper plug (JP3) is to be removed, make sure the control data have been printed out.
•User data: data that are set when the user presses the control panel's entry/setting key
•Service mode data: setting data for the service mode
• Management data: activity management record (the previous 40 transactions), sys­tem dump record
Caution:
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2-14

C. ADF height adjustment

1. Height check
Measure the clearance at the locations indicated in the diagram to check that they meet the standard value.If the clearance length is outside the standard value, adjust the height.
Figure 2-18
Clearance A standard: 1.6 mm or more to less than 2.0 mm. Clearance B standard: 2.0 mm or more to less than 2.5 mm.
2.0mm or more
Less than 2.5mm
B
1.6mm or more
Less than 2.0mm
A
2-15
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2. Height adjustment
If the clearance is outside the standard, loosen the nut on the ADF hinge unit and
adjust with the adjusting screw.
When clearance A is outside the standard value, turn the adjusting screw on the left
hinge unit.
When clearance B is outside the standard value, turn the adjusting screw on the
right hinge unit.
Figure 2-19
Adjusting screw
Nut
Adjusting screw
Nut
Hinge unit
Hinge unit
2-16
CHAPTER 2 STANDARDS AND ADJUSTMENTS

D. Skew feed adjustment

1. Checking ADF skew feed
Compare the surface position of the DF cover and DF delivery cover to make sure that the surface positions are correctly aligned.
Figure 2-20
Align the surface positions of the DF cover and the unit.
2-17
CHAPTER 2 STANDARDS AND ADJUSTMENTS
2. Adjusting skew feed
1) Loosen the right ADF hinge nut.
2) Use an Allen wrench to turn the adjusting screw and adjust ADF position.
3) After adjusting skew feed, tighten the nut to secure the adjusting screw.
Figure 2-21
Stay
Allen wrench
Right hinge
Nut
Adjusting screw
2-18
CHAPTER 2 STANDARDS AND ADJUSTMENTS

E. Adjusting image position

1. Checking image position
Check for image displacement of ADF copy and pressure plate mode copy.
1) Use A3 (297 × 420 mm) size plain paper (64 to 80 g/m2) and draw a straight line 10
mm from the paper edge on three sides of the paper to create a simple chart.
Figure 2-22
2) Place the chart on the copyboard glass and make a direct copy to A3 (297 × 420
mm) size paper.The delivered copy is sample A.
Figure 2-23
A3 size paper
10mm
10mm
10mm
A4
Document
A5
B5
A5
A4
(rear side of document)
A3B4A4B5A5A3B5A5
B5 B4
A4
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