Canon NP6350 Service Handbook

REVISION 0

JULY 1997

FY8-23AR-000

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 PRINTED MATTER.

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 1

OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIVISION

CANON INC.

5-1, Hakusan 7-chome, Toride-shi, Ibaraki 302 Japan

CHAPTER 1 MAINTENANCE AND INSPECTION

A. Scheduled Servicing Chart...........1-1

1. Copier......................................1-1

2. Paper Deck-A1 ........................1-3

B. Periodically Replaced Parts.........1-4

C. Consumables and Durables.........1-5

1. Copier......................................1-5

2. Paper Deck-A1 ........................1-6

D. Image Adjustment Basic

Procedure .....................................1-7

E. Points to Note for

Scheduled Servicing ....................1-8

CHAPTER 2 STANDARDS AND ADJUSTMENTS

A. Image Adjustment ........................2-1

1. Adjusting the Image Leading

Edge Margin ............................2-1

2. Adjusting the Image Leading

Edge Non-Image Width

(registration)............................2-1

3. Adjusting the Left/Right

Registration (left/right front

deck paper deck, cassette).....2-2

3-1. Adjusting the Left/Right

Registration (paper deck-A1)...2-3

4. Adjusting the Left/Right

Registration (holding tray position; 2nd side of two-

sided/overlay copies) ..............2-4

5. Adjusting the Left/Right

Margin .....................................2-4

6. Executing AE Automatic

Adjustment ..............................2-5

7. Adjusting the AE Slope...........2-6

B. Exposure System.........................2-7

1. Adjusting the Scanner Home

Position ...................................2-7

2. Routing the Scanner Drive

Cable.......................................2-8

3. Orientation of the Heat

Absorbing Glass ......................2-9

4. Adjusting the Tension of the

Scanning Lamp Cable.............2-9

5. Adjusting the Position of the

Mirror.....................................2-10

6. Cleaning the Mirror (No. 5

mirror)....................................2-11

7. Routing the Light-Blocking

Belt ........................................2-11

8. Routing the Lens X Direction

Drive Belt...............................2-12

9. Adjusting the Position of the Scanner Locking Solenoid

(SL1) .....................................2-12

C. Image Formation System...........2-13

1. Grid Wire of the Primary

Charging Assembly...............2-13

2. Adjusting the Height of the

Charging Wire.......................2-15

3. Adjusting the Position of the

Blanking Exposure Lamp......2-16

4. Position of the Roller

Electrode...............................2-17

5. Adjusting the Position of the Cleaning Assembly Side

Seal.......................................2-17

6. Cleaning the Cleaner Side

Scraper..................................2-18

D. Pick-Up/Feeding System............2-20

1. Orientation of the Cassette/ Front Paper Deck Pick-Up

Roller.....................................2-20

2. Orientation of the Cassette/ Front Paper Deck Separation

Roller.....................................2-21

3. Orientation of the Feeding Roller (cassette/ front paper

deck) .....................................2-21

4. Orientation of the Multifeeder

Pick-Up Roller.......................2-22

4-1. Orientation of the Paper

]4]

; cassette/

multifeeder) ...........................2-59

A. Sensors........................................3-2

B. Switches and Solenoids...............3-6

C. Motors and Fans........................3-10

D. Clutches .....................................3-12

E. Lamps, Heaters, and

Photosensors .............................3-14

F. PCBs ..........................................3-16

G. Paper Deck-A1...........................3-18

1. Sensors and Switches ..........3-18

2. Motors, Clutches, Solenoids,

and PCBs..............................3-20

H. Variable Resistors (VR),

Light-Emitting Diodes (LED),

and Check Pins by PCB.............3-22

1. DC Controller PCB................3-22

2. AC Driver PCB......................3-25

3. DC Power Supply PCB.........3-25

4. Control CPU PCB .................3-26

5. Holding Tray Driver PCB.......3-27

6. Potential Measurement

PCB.......................................3-28

7. HVT1 PCB.............................3-29

Deck-A1 Pick-Up Roller ........2-22

5. Rotation of the Multifeeder

Feeding Roller .......................2-23

5-1. Orientation of the Paper

Deck-A1 Feeding Roller........2-23

6. Adjusting the Separation Roller Pressure of the Cassette/Front Paper Deck...2-24

7. Adjusting the Separation Roller Pressure of the

Holding Tray ..........................2-25

8. Pick-Up/Feeding Roller of

the Multifeeder ......................2-25

9. Adjusting the Position of the Pick-Up Roller Releasing

Solenoid (cassette) ...............2-26

9-1. Adjusting the Position of the

Pick-Up Roller Releasing Solenoid (front paper deck)...2-27

9-2. Adjusting the Position of the

Pick-Up Roller Releasing

Solenoid (paper deck-A1) .....2-27

10.Adjusting the Position of the Pick-Up Roller Releasing

Solenoid (multifeeder)...........2-28

11.Routing the Timing Belt of the Side Guide (multifeeder

assembly)..............................2-29

12.Adjusting the Position of the Solenoid (delivery paper

deflecting plate solenoid) ......2-29

13.Adjusting the Position of the Holding Tray Paper Deflecting

Plate Drive Solenoid .............2-30

14.Adjusting the Position of the Holding Tray Assembly Side

Guide Plate ...........................2-30

15.Adjusting the Position of the Holding Tray Paper Jogging

Plate......................................2-31

16.Adjusting the Timing Belt of the Holding Tray Paper

Jogging Guide Plate..............2-31

17.Adjusting the Position of the Holding Tray Paper Jogging

Plate Solenoid.......................2-32

18.Drive Belt...............................2-32

E. Fixing System.............................2-34

1. Points to Note When Installing

the Fixing Heater...................2-34

2. Adjusting the Position of the Fixing Assembly Inlet

Guide.....................................2-34

3. Adjusting the Lower Roller

Pressure (nip)........................2-36

4. Adjusting the Fixing Clutch ...2-37

F. Electrical System........................2-38

1. When Replacing the DC

Controller PCB......................2-38

2. Checking the Surface

Potential Control System ......2-38

3. Checking the Potential

System ..................................2-43

4. Potential Control System

Conversion Table ..................2-45

5. Checking the Environment

Sensor...................................2-50

6. Checking the

Photointerrupters...................2-51

7. Registering the Paper Width Basic Value (

CHAPTER 3 ARRANGEMENT AND FUNCTIONS OF THE ELECTRICAL PARTS

8. HVT2 PCB.............................3-30

9. Inverter PCB..........................3-30

10.Lamp Regulator PCB............3-31

CHAPTER 4 SERVICE MODE

11.Counter PCB.........................3-31

12.Side Deck Driver

(paper deck-A1) ....................3-32

A. Outline..........................................4-1

B. Using Service Mode.....................4-2

C. Using Adjustment Mode and

Options Mode...............................4-2

D. Display Mode ( )..................4-4

]

CHAPTER 5 SELF DIAGNOSIS

A. Copier...........................................5-1

B. RDF-D1........................................5-6

APPENDIX

A. GENERAL TIMING CHART.........A-1

SIGNALS AND ABBREVIATIONS

1. Signals....................................A-3

2. Abbreviations..........................A-4

C. GENERAL CIRCUIT DIAGRAM..A-5 D. PAPER DECK-A1 GENERAL

CIRCUIT DIAGRAM ....................A-7

..A-3

E. I/O Display Mode ( )..........4-17

F. Adjustment Mode ( )..........4-53

G. Function Mode ( )..............4-62

H. Options Mode ( ) ...............4-66

I. Counter Mode ( )...............4-71

]

C. Sorter............................................5-8

E. SPECIFICATIONS.......................A-9

A.Copier ..........................................A-9

1. Type........................................A-9

2. Mechanisms............................A-9

3. Performance .........................A-10

4. Others...................................A-13

B.Paper Deck-A1 ..........................A-16

iii

CHAPTER 1 MAINTENANCE AND INSPECTION

A. Scheduled Servicing Chart

Do not use solvents or oils other than those specified.

1. Copier

: Clean : Replace : Oil : Adjust : Inspect

Note 1: Take care not to touch the mirrors or the lenses.

CHAPTER 1 MAINTENANCE AND INSPECTION

1-1

Caution:

Unit

Optical path

Use alcohol; then, apply oil.

Charging assembly

Photosen sitive drum

Developing assembly

Part

No. 1/No. 6 mirror

Dust-proofing glass Heat absorbing glass Standard white plate Reflecting shade

(scanning lamp) Scanner rail

Scanner cable

Charging wire (primary, pre-transfer, transfer, separation)

Grid wire (primary) Shielding plate (each

charging assembly) Roller electrode waste

toner case (pre-transfer charging assembly)

Photosensitive rum Anti-stray toner sheet

(primary charging assembly)

Developing cylinder Developing roller Anti-stray toner sheet

(developing assembly)

Remarks

Use blower brush; for No. 5 mirror, use mirror cleaning tool.

Use alcohol; then, apply lubricant.

Check and adjust if for initial 250,000.

Use solvent.

at instal-

lation

every 250,000

every 500,000

every 750,000

every 1,000,000

Intervals

CHAPTER 1 MAINTENANCE AND INSPECTION

Unit

Part

at instal-

lation

Intervals

every 250,000

every 500,000

every 750,000

every 1,000,000

Remarks

Cleaner

Fixing assembly

Delivery assembly

Waste toner collection assembly

Externals

Blade

Side scraper assembly Separation claw Inlet guide Fixing web

Thermistor Oil receptacle

Separation claw (upper/lower)

Waste toner

Copyboard glass Ozone filter Air filter (scanner

cooling fan)

(upper)

*Replace edge. Apply toner.

Remove paper lint.

Take up during installation.

(lower)

Remove as necessary.

Pick-up assembly

Feeding assembly

Holding tray

Hopper

Pick-up roller Feeding roller Separation roller Transfer guide/roll Registration roller

(upper/lower) Feeding belt Feeding roller Pick-up roller (crescent) Upper separation belt Separation lower

feeding roller Toner supply mouth Toner receptacle

1-2

2. Paper Deck-A1

Unit

Pick-up roller

Part

CHAPTER 1 MAINTENANCE AND INSPECTION

: Clean : Replace : Oil : Adjust : Inspect

Intervals

at instal-

lation

every 250,000

every 500,000

every 750,000

every 1,000,000

Remarks

Pick-up assembly

Feeding roller Separation roller Vertical path, roll

1-3

CHAPTER 1 MAINTENANCE AND INSPECTION

B. Periodically Replaced Parts

Some parts of the machine must be replaced on a periodical basis to maintain the performance of the machine at a specific level regardless of the presence/absence of damage (when they fail, they will affect the performance to a significant degree).

Schedule the replacement so that it coincide with a scheduled service visit.

as of July 1997

No.

Primary/pre-transfer/transfer/ separation charging wire

Primary charging assembly grid wire

Parts name

Part number FY3-0030-000 FY3-0040-000 FY1-0883-000

Q’ty

AR AR AR

Life (copies)

250,000 250,000 500,000

Remarks

100V

120/230V

Note: The above values are all estimates and are subject to change based on future

data.

Table 1-1

1-4

CHAPTER 1 MAINTENANCE AND INSPECTION

C. Consumables and Durables

Some parts of the machine may need replacement once or more because of wear or

damage. Use the table as a reference, and replace them as needed.

1. Copier

as of July 1997

No.

2 3 4 5 6 7 8 9

10 11

Parts name

Multifeeder pick-up roller

Multifeeder feeding roller Multifeeder separation roller Scanning lamp Scanning lamp Cleaner separation claw Fixing cleaning belt Delivery upper separation claw Pick-up roller (paper deck,

cassette) Feeding roller (paper deck, cassette)

Separation roller (paper deck, cassette)

Duplexing pick-up crescent roller

FF5-1220-000 FF5-1221-000 FB2-7522-000 FB2-7545-000 FH7-3280-000 FH7-3282-000 FB2-6899-000 FA3-8908-000 FC1-0391-030 FF5-1220-000 FF5-1221-000 FB2-7695-000 FB2-7777-000

FC2-1532-000

Parts number

Q’ty

1 1 2 1 1 1 3 1 6 4 4 8 4

Life (copies)

120,000 120,000 120,000 120,000 250,000 250,000 250,000 250,000 500,000 250,000 250,000 250,000 250,000

250,000

Remarks Front Rear

100V/120V 220V/240V

Rear Front

Duplex upper separation belt

13 14

Duplexing feeding roller

Primary charging wire cleaner 1

Primary charging cleaner 2

Transfer charging wire cleaner

Separation charging wire cleaner

Pre-transfer charging wire cleaner

Pre-transfer charging assembly scraperr

Upper fixing roller

Lower fixing roller

FA5-5427-000 FC2-1533-000 FF2-3552-000 FF2-3551-000 FF2-3551-000 FF2-3552-000 FF5-3090-000 FF5-3090-000 FA4-1867-000

FB2-7200-000 FB2-7121-000

Table 1-2a

8 1 2 2 1 1 2 1 1

1 1

250,000 250,000 500,000 500,000 500,000 500,000 500,000 500,000 500,000

500,000 500,000

1-5

CHAPTER 1 MAINTENANCE AND INSPECTION

No.

24 25 26 27 28

29 30

31 32 33 34

Parts name

Heat insulating bush (front, rear)

Fixing main thermistor (TH1) Fixing sub thermistor (TH2) Pick-up clutch (left deck, cassette) Pick-up clutch (right deck, cassette 1) Cleaning blade

Primary charging assembly Transfer/separation charging

assembly Pre-transfer charging assembly Fixing thermal switch Delivery lower separation claw Developing cylinder

Parts number

FB2-7239-000

FH7-7349-000 FG5-8812-000 FH7-5726-000 FH7-5729-000 FA4-1827-000

FG5-4378-030 FG5-4550-090

FG5-4377-050 FH7-7154-000 FA2-9037-000 FF5-3086-000

Q’ty

1 1 3 1 1

1 1

1 1 2 1

Life (copies)

500,000

500,000 1,000,000 1,000,000 1,000,000

1,000,000 1,000,000

1,000,000 1,000,000 1,000,000 1,000,000

Remarks

Simultaneously w/ upper fixing roller.

Use both edges; 500,000 for each

Developing assembly roll

2. Paper Deck-A1

No.

2 3

Side paper deck pick-up roller*

Side paper deck feeding roller Side paper deck separation

roller

Parts name

* Exercise care during replacement; the pick-up roller of the side paper deck and

the pick-up roller of the machine must be oriented differently.

FB2-6933-000

Table 1-2b

Parts number FF5-1220-000 FF5-1221-000 FB2-7695-000 FB2-7777-000

Table 1-2c

Q’ty

1 1 2 1

1,000,000

Life (copies)

250,000 250,000 250,000 250,000

as of July 1997

Remarks Front Rear

1-6

D. Image Adjustment Basic Procedure

n Non-AE, Copy Density at 5

1-7

Is there a

difference in density

between front

and rear?

Is it low (light)

at the rear?

Turn the adjusting screw at the rear of the primary charging assembly clockwise, and turn the adjusting screw at the front counterclockwise the same degree (1.5 mm max. each).

Make two to three copies of the Test Sheet.

Check the height of the charging wire.

Turn the adjusting screw at the rear of the primary charging assembly counterclockwise, and turn the adjusting screw at the front clockwise the same degree (1.5 mm max. each).

Turn off and then on the machine, and make a copy.

Note 1: If the difference still exists after turning the screw

1. 5 mm (each; a full turn causes a 0.7mm difference), check the charging assemblies, scanning lamp, and scanner for dirt.

Note 2: When turning the screw counterclockwise, take

care so that the wire is not 7.5mm or less in height.

Check the copy paper and the transfer system.

Is the density

of gray scale No. 1

too low (light)?

Clean the standard white plate, mirror, lens, dustroofing glass, scanning lamp, reflecting plate, and heat absorbing glass.

Turn off and then on the machine, and make a copy.

Is 'VDM' 'VDT'

±10 V?

Is 'PLMT' '1'?

Is 'VL1M' 'VL1T'

±10 V?

Is 'VL1M" 'VL1T'

±10V?

Check the potential control system; if normal, replace the photosensitive drum.

Check the scanning lamp and the potential control system; if normal, replace the photosensitive drum.

Increase the value of 'VDT-SW'.

Turn off and on the machine, and make a copy.

Increase the value of 'LIGHT_5'.

Decrease the value of 'LIGHT_5'.

Is the density

of gray scale No. 10

proper?

Is the density

of gray scale No. 10

too high (dark)?

Execute AE adjustment. (See p. 11-36.)

<Pre-Checks>

Solid black>

YES

*1*

*3*

*5*

Clean the charging wire.

Make a copy.

E. Points to Note for Scheduled Servicing

Cleaning

Parts Tools/chemicals

Remarks

Multifeeder tray, pick-up roller, feeding roller

Vertical path roller

Alcohol, lint-free paper

Cleaning

Parts Tools/chemicals

Remarks

Pre-exposure lamp

Primary charging assembly, transfer/separation charging assembly, pretransfer charging assembly

Dust-proofing glass Blanking exposure lamp

No. 4 through No. 6 mirrors

Roller electrode

Developing assembly mount

Registration roller

Moist cloth (Note)

Alcohol, lint-free paper

Lint-free paper

Blower brush or lintfree paper

Alcohol, lint-free paper

Cleaning

Dry wiping; then, using lintfree paper moistened with alcohol

Cleaning

Cleaning with blower brush; if necessary, using lint-free paper. For No. 5 mirror, use mirror cleaning tool

Dispose of toner collecting on roller electrode

Cleaning

Note: Make sure no droplets of water remain.

Parts

Copyboard glass

Tools/chemicals

Remarks

Cleaning

Alcohol Lens Heat absorbing glass Standard white plate Reflecting plate

Blower brush

Lint-free paper

Blower brush

Cleaning Dry wiping Dry wiping Cleaning

No. 1 through No. 3 mirrors

Blower brush or lint-

free paper

Cleaning with blower brush; if necessary, lint-free paper

Parts Tools/chemicals

Remarks

Separation claw

Upper roller, lower roller

Feeding assembly Re-pick up assembly,

refreshing roller Re-pick up assembly,

pick-up roller, registration roller

Solvent and lint-free

paper

Cleaning oil, lint-free

paper

Moist cloth (Note)

Alcohol, lint-free paper

Paper guide

Solvent, lint-free paper

Alcohol, lint-free paper

Cleaning

Anti-stray toner (primary charging assembly)

Cleaning

Anti-stray toner sheet (developing assembly)

Cleaning

Caution:

• Make thorough checks of the block (front, rear) for melting by leakage, deformation by heat, tears, and yellowing. If any fault is found, replace it.

• Be sure to check and clean the inner side as well as the outer side of the block (front, rear).

• Do NOT use a cloth coated with metal powder for cleaning.

• Do NOT use a moist cloth for cleaning. Use lint-free paper, and clean. (Be sure that the part is fully dry before putting it back into the machine.

• Try to finish all work (scheduled servicing/maintenance) within a specific period of time.

1-8

CHAPTER 2 STANDARDS AND ADJUSTMENTS

A. Image Adjustment

1. Adjusting the Image Leading Edge Margin

Select ‘LE_BLANK’ in service mode ( ). Make adjustments so that the image leading edge margin is 4.5 ±1.5 mm when the

Test Sheet is copied in Direct.

(unit: 0.1 mm)

Figure 2-1

2. Adjusting the Image Leading Edge Non-Image Width (registration)

Select ‘REGIST’ in service mode ( ). Make adjustments so that the image leading edge margin is 4.5 ±1.5 mm when the

Test Sheet is copied in Direct.

(unit: REGIST:0.1 mm)

Figure 2-2

4.5±1.5mm

]

CHAPTER 2 STANDARDS AND ADJUSTMENTS

2-1

4.5±1.5mm

Adjusting plate

Screw

Adjusting plate

Screw

0±1.5mm

0 2

4 6

(+)(-)

CHAPTER 2 STANDARDS AND ADJUSTMENTS

3. Adjusting the Left/Right Registration (left/right front deck paper deck, cassette)

Make adjustments by moving the horizontal registration adjusting plate of each left/right paper deck/cassette so that the edge-to-edge distance between the copy image and the copy paper is 0 ±1.5 mm.

Figure 2-3

a. Left/Right Front Paper Deck

Figure 2-4a

2-2

Figure 2-4b

b. Cassette

Screws

Latch plate

Scale

Screw

Adjusting Plate

CHAPTER 2 STANDARDS AND ADJUSTMENTS

Figure 2-5

3-1.Adjusting the Left/Right Registration (paper deck-A1)

1) Make a copy of the Test Sheet, and check to make sure that the left/right registration between copy image and paper deck is 0 ±1.5 mm or less.

2) If the left/right registration is not as specified, adjust the position of the latch plate of the deck opening solenoid by turning the two adjusting screws. (At this time, use the scale on the latch plate as a reference.)

Figure 2-5a (rear left of compartment)

2-3

CHAPTER 2 STANDARDS AND ADJUSTMENTS

4. Adjusting the Left/Right Registration (holding tray position; 2nd side of twosided/overlay copies)

Loosen the two screws, and move the guide plate of the holding tray assembly so that the edge-to-edge distance between the copy image and the copy paper is 0 ±2.0 mm in Direct.

(+)(-)

0±2.0mm

0 2

4 6

Figure 2-6

5. Adjusting the Left/Right Margin

Make adjustments so that the image left/right margin is 2.75 ±2.5 mm when the Test Sheet is copied in Direct.

Be sure to adjust the left/right registration before making this adjustment. a. Front Margin Adjustment (left margin)

Select ‘F-BLANK’ in service mode ( ), and change the setting. Increasing the

]

setting increases the front margin.

(unit: 0.1 mm) b. Adjusting the Rear Margin (right margin)

Select ‘R-BLANK’ in service mode ( ), and change the setting. Increasing the

]

setting increases the rear margin.

(unit: 0.1 mm)

2-4

← (]: START)

(0: F5, 1:F9).

4) Place the Test Sheet on the copyboard, and close the copyboard cover.

Figure 2-7

5) Press the user mode key

] once.

•The scanning lamp turns on, and auto adjustment is executed. AE_ADJ: 1 ← (]: START)

Changes to ‘1’.

6) Place a newspaper on the copyboard, and close the copyboard cover.

7) Press the user mode key

] once.

•The scanning lamp turns on, and automatic adjustment is executed. AE_ADJ: 0 ← (]: START)

Changes to ‘0’.

8) Press the Reset key twice to end service mode.

NA-3 Test Sheet

Butted.

CHAPTER 2 STANDARDS AND ADJUSTMENTS

2-5

6. Executing AE Automatic Adjustment

1) Open the front door, and insert the door switch actuator into the door switch actuator.

2) Push the service mode switch over the cover.

3) Select the following in service mode: AE_ADJ:0

CHAPTER 2 STANDARDS AND ADJUSTMENTS

q If you decrease the setting in adjustment mode,

→Copies of a newspaper will be lighter.

w If you increase the setting in adjustment mode,

→Copies of a newspaper will be darker.

Note:

You may press the Copy Start key to make copies.

6) Press the Reset key twice to end service mode.

]

7. Adjusting the AE Slope

After executing AE auto adjustment, make a copy of a newspaper (or a rather dark

original). If the copy is foggy or too light, perform the following:

1) Open the front door, and insert the door switch actuator into the door switch assembly.

2) Press the service mode switch over the cover with a clip.

3) Select ‘AE_SLOP’ in service mode ( ).

4) Place a newspaper (or a relatively dark original) on the copyboard.

5) Change the setting using the numeric keypad, and press the user mode key (

]).

2-6

A is within section B.

Figure 2-8

No. 1 mirror mount

Electrode (front)

Section A of left of wall

Glass support

(front)

Hole

]

CHAPTER 2 STANDARDS AND ADJUSTMENTS

2-7

B. Exposure System

1. Adjusting the Scanner Home Position

After making copies, remove the control panel, and check to make sure that the line in section A on the electrode mount (front) of the No. 1 mirror mount is in section B of the hole of the glass support (front).

Otherwise, change the setting of ‘BRAKE_SC’ in service mode ( ) so that the line in section

Steel ball

Wind eight times.

Fix in place temporaily.

CHAPTER 2 STANDARDS AND ADJUSTMENTS

2. Routing the Scanner Drive Cable

Route the cable as indicated (q through i), and adjust the tension of the cable and

the position of the mirror.

Figure 2-9

2-8

10 mm

(rear)

(front)

Mirror mount

White paint

(rear)

(front)

CHAPTER 2 STANDARDS AND ADJUSTMENTS

3. Orientation of the Heat Absorbing Glass

When replacing the heat absorbing glass, make sure that the white paint marking is toward the rear of the machine.

Figure 2-10

4. Adjusting the Tension of the Scanning Lamp Cable

1) Remove the two mounting screws, and remove the left cover.

2) Loosen the fixing screw on the tension spring bracket.

3) Turn the tension adjusting screw so that the reading is as indicated.

• Turn the tension adjusting screw A so that the reading of the spring gauge is 200 ±50 g when the center of the scanner cable is pulled about 10 mm.

Figure 2-11

2-9

CHAPTER 2 STANDARDS AND ADJUSTMENTS

5. Adjusting the Position of the Mirror

You must always adjust the position of the mirror whenever you have installed the

scanner drive cable.

1) Move the No. 1 mirror mount and the No. 2/No. 3 mirror to the left.

2) Set the mirror positioning tool (front, rear; FY9-3011) as shown.

Figure 2-12

Figure 2-13

2-10

CHAPTER 2 STANDARDS AND ADJUSTMENTS

6. Cleaning the Mirror (No. 5 mirror)

1) Remove the copyboard glass.

2) Remove the lens hood.

3) Remove the mirror guide plate.

4) Move the lens stage in the direction of Enlarge.

5) Remove the screw, and remove the mirror cleaning tool.

6) While butting the mirror cleaning tool q against the No. 5 mirror as shown, clean the mirror by moving the tool in the direction of the arrow. At this time, be sure that your finger or the cleaning tool will not touch the No. 4 mirror.

7. Routing the Light-Blocking Belt

Figure 2-14

q Light-blocking belt 1 e Light-blocking belt 3 w Light-blocking belt 2 r Light-blocking belt 4

Figure 2-15

2-11

E-ring

Standards (10.5 ±0.5 mm; from bottom of clamp to top of solenoid)

Scanner locking solenoid

Loosen these two screws to adjust.

Own weight

CHAPTER 2 STANDARDS AND ADJUSTMENTS

8. Routing the Lens X Direction Drive Belt

Fix the lens X direction drive motor q with the mounting screw w where the motor

has lowered on its own weight.

Figure 2-16

9. Adjusting the Position of the Scanner Locking Solenoid (SL1)

1) Remove the rear cover.

2) Remove the multifeeder assembly. (See Service Manual Chapter 5.)

3) Adjust the stroke of the scanner locking solenoid as indicated.

2-12

Figure 2-17

CHAPTER 2 STANDARDS AND ADJUSTMENTS

Screw

Screws

C. Image Formation System

1. Grid Wire of the Primary Charging Assembly

1) Loosen the two mounting screws used to fix the left/right shielding plate in place.

2) Loosen the three mounting screws used to fix the motor unit in place at the front.

Figure 2-18

3) Loosen the mounting screw, and move the assembly in the direction indicated in Figure 2-19; then, fix it in place temporarily.

Figure 2-19

4) Free a length of charging wire (about 5 cm) from the charging wire reel (0.1mm dia.); then, form a loop at its end (2mm dia.)

Reference:

To form a loop, wind the charging wire around a hex key three to four times, and twist the charging wire.

5) Cut the twisted charging wire (excess) with a nipper.

2-13

Stud A

Screw

CHAPTER 2 STANDARDS AND ADJUSTMENTS

6) Hook the loop on the stud A shown in Figure 2-20.

Figure 2-20

7) After routing the wire for 31 runs, lead it through section B, give it a 1/2 turn, lead it between washer and motor unit, wind it once around the mounting screw clockwise, and fix it in place with the mounting screw.

8) Cut the excess charging wire with a nipper.

9) Tighten the mounting screw loosened in step 8). Take care to avoid deformation (slack) of the charging assembly. Try to tighten the mounting screw (front) on the shielding plate (left, right) earlier.

2-14

2. Adjusting the Height of the Charging Wire

7.5+1.5

-0mm

7.5+1.5

-0mm

9.5+1.0

-0mm

10.2±0.5mm

A:16.2±0.5mm B:14.9±0.5mm

CHAPTER 2 STANDARDS AND ADJUSTMENTS

Charging assembly

Primary

Pre-transfer

Transfer

Separation

Height of charging wire

Tolerance

±1mm

No adjusting mechanism

±2mm

Table 2-1

Reference:

Y ou can adjust the height (position) of the primary, transfer/separation charging wire by turning the screw behind the charging assembly. A full turn changes the position of the charging wire by about 0.7 mm.

2-15

Adjusting screw

0 2

4 6 8

0 2

3 6 8

1 W1

CHAPTER 2 STANDARDS AND ADJUSTMENTS

3. Adjusting the Position of the Blanking Exposure Lamp

1) Place the Test Sheet on the copyboard.

2) Select A4 copy paper.

3) Make a copy, and check that the left/right registration is correct.

4) Make a copy in Direct.

5) Check the image, and measure the non-image width shown in Figure 2-21.

Standard

Paper

All sizes

Left/right non-image width (W1)

2.75 ± 2.5mm

(w/ standard frame erasing)

Table 2-2

Figure 2-21

6) If the non-image width is not as specified, turn the adjusting screw to adjust the position of the blanking exposure lamp assembly.

2-16

Figure 2-22

+ 178 hidden pages

Canon NP6350 Service Handbook

CONTENTS

CHAPTER 1 MAINTENANCE AND INSPECTION

A. Scheduled Servicing Chart

B. Periodically Replaced Parts

C. Consumables and Durables

D. Image Adjustment Basic Procedure

E. Points to Note for Scheduled Servicing

CHAPTER 2 STANDARDS AND ADJUSTMENTS

A. Image Adjustment

B. Exposure System

C. Image Formation System