Text preview for : 7050e031.pdf part of konica 7050e 7050e service manual and instructions
Back to : 7050e.zip | Home
3
MAIN BODY (A ~ I )
3. MAIN BODY
OUTLINE OF THE SYSTEM ........................ 3-A-1 7050 Product Specifications ......................... 3-A-2 Center Cross-section .................................... 3-A-4 Drive System Diagram .................................. 3-B-1 [1] Main Drive ........................................... 3-B-1 [2] Drum/Developing Drive ....................... 3-B-2 [3] Paper Feed Drive ................................ 3-B-3 [4] ADU Paper Exit/Conveyance Drive..... 3-B-4 [5] ADU Paper Exit/Conveyance Drive..... 3-B-5 [6] 1000-Tray Paper Feed/Conveyance Drive3-B-6 [7] 1500-Tray Paper Feed/Conveyance Drive3-B-7 External section ............................................ 3-C-1 [1] Composition ........................................ 3-C-1 [2] Disassembly and Re-assembly ........... 3-C-1 Drive section ................................................. 3-D-1 [1] Composition ........................................ 3-D-1 [2] Mechanisms ........................................ 3-D-1 [3] Disassembly and Re-assembly ........... 3-D-1 [4] M1 (main) Control ............................... 3-D-3 [5] M4 (drum) control ................................ 3-D-4 Read Section ................................................ 3-E-1 [1] Composition ........................................ 3-E-1 [2] Mechanisms ........................................ 3-E-1 [3] Disassembly and Re-assembly ........... 3-E-1 [4] M12 (optics drive) Control ................... 3-E-7 [5] Exposure control ............................... 3-E-11 [6] Original Read Control ....................... 3-E-12 [7] APS Control ...................................... 3-E-12 [8] EE Control ......................................... 3-E-14 Write Unit ...................................................... 3-F-1 [1] Composition ........................................ 3-F-1 [2] Mechanisms ........................................ 3-F-1 [3] Disassembly and Re-assembly ........... 3-F-2 [4] M5 (polygon) Control .......................... 3-F-5 [5] Image Write Control ............................ 3-F-6 Drum Unit ...................................................... 3-G-1 [1] Composition ........................................ 3-G-1 [2] Mechanisms ........................................ 3-G-1 [3] Disassembly and Re-assembly ........... 3-G-2 [4] PCL/TSL Control ................................. 3-G-5 [5] Separation claw control ....................... 3-G-5 [6] Paper Guide Plate Control .................. 3-G-6 Corona Unit Section ...................................... 3-H-1 [1] Composition ........................................ 3-H-1 [2] Mechanisms ........................................ 3-H-1 [3] Disassembly and Re-assembly ........... 3-H-2 [4] Charging Control ................................. 3-H-5 [5] Transfer/Separation Control ................ 3-H-6 [6] M7 (charging wire cleaning) control .... 3-H-7 [7] M8 (transfer/separation wire cleaning) Control ................................................ 3-H-8 Developing Unit ............................................. 3-I-1 [1] Composition ......................................... 3-I-1 [2] Mechanism ........................................... 3-I-1 [3] Disassembly/Assembly ........................ 3-I-2 [4] M3 (developing drive) Control .............. 3-I-4 [5] M35 (agitator screw) control................. 3-I-5 [6] Developing Bias Control ...................... 3-I-5 [7] Toner Density Control .......................... 3-I-6 [8] Dmax Control ....................................... 3-I-7 [9] Gradation Correction Control ............... 3-I-8 [10] FM30 (developing suction) Control .... 3-I-9
This section covers the structure, functions, operation and method of disassembling and assembling the machine. Observe the following precautions when performing disassembly and assembly work. 1. Be sure to unplug the power cord before working on the machine. 2. Perform all reassembly work by reversing the order in which the componet was disassembled, unless otherwise specified. 3. Do not lose small parts (screws, etc.) or insert them in the wrong place. 4. Install all parts completely before operating the machine. 5. Do not loosen the screws indicated as disallowed for removal.
MAIN BODY
OUTLINE OF THE SYSTEM
Memory card
Finisher [FS-102]
Expansion memory unit [MU-101, MU-102]
Memory card adapter kit
Video interface kit Key counter
Printer controller: [IP-201]
Network card: [KN-101] Weekly timer/ KRDS unit [WT-101K]
[FS-103]
3-A-1
MAIN BODY
7050 PRODUCT SPECIFICATIONS
1. Type
Console type (floor-mounted type) Copying method: Indirect electrostatic method Original table method: Fixed Photosensitive material: OPC Sensitizing method: Laser writing method Paper feed method: Two stacked trays (500 sheets x 2, 80 g/m2) Multi by-pass tray (150 sheets, 80 g/m2) LCT (1000 sheets/1500 sheets, 80 g/m2) Type: Special functions: OHP interleave, Thin paper/thick paper mode, 2 IN 1/4 IN 1 mode, Sheet/copy insertion mode, Chapter classification, Book copy, Repeat image, Text/photo mode, Reversed black and white mode, Non-image area erasure, Fold erasure/frame erasure, Shift/ reduction shift, Weekly timer, Job memory, Mixed original mode, Image insert, Image reading, Single step mode, Book memory
3. Copy Paper
Plain paper High quality paper (60 g/m2 to 90 g/m2) Special paper * Label paper * OHP film (by-pass feed only) * Blueprint master * Offset masters * Recycled paper * Reproducibles * High quality paper (50 g/m2 to 59 g/m2, 91 g/m2 to 130 g/m2)
2. Functions
Originals: Original size: Copy size: Magnification Fixed magnifications: Special ratio magnifications: Zoom magnification: Vertical magnification: Horizontal magnification: Warm-up time: Sheets, books, solid objects Max A3 A3 to A5R x1.00, x1.41, x1.22, x1.15, x0.82, x0.86, x0.71 2 modes x0.50 to 4.00 (1% steps) x0.50 to 4.00 (1% steps)
4. Options
Key counter Finisher: Weekly timer/KRDS: Expansion memory unit: Memory card Memory card adapter kit Printer controller: Network card: Video interface kit FS-102/FS-103 WT-101K MU-101/MU-102
x0.50 to 4.00 (1% steps) Approx. 5.5 minutes (20°C, rated voltage) First copy time (seconds) Size Manual AE APS A4 4.9 4.9 4.9
IP-201 KN-101
5. Particulars of Machine
Continuous copy speed (life size, copies/minute) Size A4 A4 51 Power source: 230 VAC 14% to +10.6%, 50/60 Hz 120 VAC ±10%, 60Hz Max. 2100 W Approx. 200 kg
Number of continuous copies: 1 to 999 Copy density selection: AE, manual Arbitrarily set density (2 modes)
Power consumption: Weight: Machine dimensions
710mm
700mm
3-A-2
1095mm
MAIN BODY
6. Maintenance
Maintenance interval: Every 120,000 copies Machine service life: 5,000,000 copies or 5 years
7. Copy Materials
Developer: Toner: Drum: Exclusively for 7050 Exclusively for 7050 OPC drum ( 80) Exclusively for 7050
8. Machine Operating Environment
Temperature:10 to 30°C Humidity: 10 to 80%RH These specifications are subject to change without notice.
3-A-3
MAIN BODY
CENTER CROSS-SECTION
Exposure lamp Cleaning section PCL
Charging corona unit
ADF
Image read unit
Image write unit Image processing section Developing unit
Fixing unit
Paper feed section
Upper tray
ADU paper exit/ conveyance unit
Conveyance unit 2nd paper feed unit
Lower tray
Transfer corona unit ADU paper feed/ conveyance section TSL
Separation corona unit LCT-1500 tray LCT-1000 tray
3-A-4
MAIN BODY
6. Maintenance
Maintenance interval: Every 100,000 copies Machine service life: 5,000,000 copies or 5 years
7. Copy Materials
Developer: Toner: Drum: Exclusively for 7050 Exclusively for 7050 OPC drum ( 80) Exclusively for 7050
8. Machine Operating Environment
Temperature:10 to 30°C Humidity: 10 to 80%RH These specifications are subject to change without notice.
3-A-3
MAIN BODY
CENTER CROSS-SECTION
Exposure lamp Cleaning section PCL
Charging corona unit
ADF
Image read unit
Image write unit Image processing section Developing unit
Fixing unit
Paper feed section
Upper tray
ADU paper exit/ conveyance unit
Conveyance unit 2nd paper feed unit
Lower tray
Transfer corona unit ADU paper feed/ conveyance section TSL
Separation corona unit LCT-1500 tray LCT-1000 tray
3-A-4
DRIVE SYSTEM DIAGRAM
DRIVE SYSTEM DIAGRAM
[1] Main Drive
Conveyance belt Toner conveyance screw
A
Main Motor (M1)
2nd paper feed roller Timing belt
2nd paper feed MC (MC3)
3-B-1
DRIVE SYSTEM DIAGRAM
[2] Drum/Developing Drive
Drum
Drum motor (M4)
Agitator wheel
Developing sleeve Agitator screw motor (M35)
Developing drive motor (M3)
Agitator screw
3-B-2
DRIVE SYSTEM DIAGRAM
[3] Paper Feed Drive
Upper tray motor (M17)
Lower tray motor (M18) By-pass paper feed roller Paper feed motor (M13) By-pass roller
Double feed prevention roller
Paper feed rollers
Feed rollers Double feed prevention rollers
3-B-3
DRIVE SYSTEM DIAGRAM
[4] ADU Paper Exit/Conveyance Drive
Timing belt
Paper exit rollers
Timing belt ADU timing CL (CL153)
Timing belt
Timing belt Paper exit rollers
ADU reversal CL (CL152)
ADU paper feed motor (M151) Conveyance roller
ADU paper feed CL (CL151)
Reversal roller
3-B-4
DRIVE SYSTEM DIAGRAM
[5] ADU Paper Exit/Conveyance Drive
Paper exit rollers
Timing belt
A
Conveyance rollers
Timing belt
3-B-5
DRIVE SYSTEM DIAGRAM
[6] 1000-Tray Paper Feed/Conveyance Drive
Conveyance roller (upper)
Paper feed roller Timing belt Conveyance roller (lower) Feed roller
B
Double feed prevention roller
3-B-6
DRIVE SYSTEM DIAGRAM
[7] 1500-Tray Paper Feed/Conveyance Drive
Timing belt
B
Horizontal conveyance rollers
Paper feed roller
Feed roller Timing belt
Double feed prevention roller LCT paper feed motor (M140) LCT 1st paper feed CL (CL1)
3-B-7
EXTERNAL SECTION
EXTERNAL SECTION
[1] Composition
Main switch Operation panel Left side upper cover Paper exit tray Upper tray ADU conveyance door Lower tray ADU LCT-1000 tray LCT-1500 tray ADF Front door By-pass feed table Paper feed and conveyance door Right side upper cover LCT conveyance door Outer I/F connector ADF connector FNS connector Rear cover
Left side lower cover
Right side lower cover
[2] Disassembly and Re-assembly
Caution: Be sure that the power cord has been unplugged from the power outlet. Caution: When replacing the ozone filter, fix the new filter securely to the inside of the main body.
C
C
(2) Pull out the ozone filter box toward you, then attach the handle to the board mounting panel and fix it. (3) Pull up the ozone filter (S), then pull it out and remove it.
1. Replacing the ozone filter (S)
C
a. Procedure (1) Remove the nine set screws, then remove the rear cover.
ADF Set screw Set screw
Ozone filter (S) Ozone filter box
Set screw
ADF connector (CN102)
Handle
Board mounting panel
Set screws
Set screws
C
Set screw Set screw
(4) Re-install the ozone filter in the opposite sequence to removal.
3-C-1
EXTERNAL SECTION
2. Replacing the Ozone Filter (H)
a. Procedure (1) Remove the nine set screws, then remove the rear cover. (2) Pull forward the ozone filter (H) and remove it.
4. Replacing the dust proof filter
a. Procedure (1) Open the front door and the ADU conveyance door. (2) Slacken the four set screws, then remove the left side upper cover.
Left side upper cover
Set screws Ozone filter (H) Front door
ADU conveyance door
Set screws
(3) Re-install the ozone filter in the opposite sequence to removal.
3. Replacing the developing suction filter
a. Procedure (1) Remove the rear cover. (2) Remove the lock, open the filter box, and remove the developing suction filter.
(3) Open the ADF. (4) Remove the two set screws, then remove the glass holder. (5) Remove the two set screws, then remove the original stopper plate. (6) Remove the platen glass.
Set screws Original stopper plate
Platen glass
Developing suction filter Filter box
Glass holder Set screws
(3) Re-install the suction filter in the opposite sequence to removal.
3-C-2
EXTERNAL SECTION
(7) Remove the two set screws, and remove the upper cover (center).
Set screw
Set screw Upper cover (center)
(8) Remove the dustproof filter, then install the new dustproof filter.
Dust proof filter
(9) Install the other parts in the reverse sequence to removal.
3-C-3
DRIVE SECTION
DRIVE SECTION
[1] Composition
Drum motor (M4) Agitator screw motor (M35) Main motor (M1) Developing drive motor (M3)
Drum drive unit
[2] Mechanisms
Mechanism *1 Drum drive *1 Developing sleeve drive *1 Developing agitator drive 2nd paper feed drive conveyance drive Fixing and exit drive ADU lead-in drive Toner recycle Method Gear drive (dedicated motor) Gear drive (dedicated motor) Gear drive (dedicated motor) Timing belt + gear drive Timing belt + gear drive Timing belt + gear drive Timing belt + gear drive Timing belt + gear drive
a. Procedure (1) Remove the drum unit from the main body. (Refer to "Drum unit section".) (2) Remove the nine set screws, then remove the rear cover. (3) Remove the three set screws, then remove the flywheels (two).
*1: Separation of the different parts of the drive system The drum, developing sleeve and developing agitator of this machine are driven by separate motors in order to improve the serviceability of the drum unit and also to improve the developing performance.
[3] Disassembly and Re-assembly
1. Removing and Re-installing the Main Motor Unit
Caution: Be sure that the power cord has been unplugged from the power outlet. Caution: Be sure to remove the drum carriage before removing or re-installing the main motor unit. If you leave the drum carriage installed, the cleaning blade is likely to be damaged because the drum will turn when you remove or re-install the flywheel.
Flywheels
Set screws
3-D-1
DRIVE SECTION
(4) Disconnect the three connectors (CN204, 205 and 324), then remove the cable from the wiring clamp. (5) Remove the four set screws, slide the main motor unit to the right, then pull it forward and remove it. Caution: DO NOT strike the main motor unit against the drum drive gear when removing or re-installing it.
Guide screw Connectors (CN204 and 205) Set screw
(3) Remove the one bearings, then remove the cleaner drive shaft unit.
Slotted hole Cleaner drive shaft unit Set screw Drum drive gear Main motor unit Set screw Connector (CN324) Set screw Bearing
(4) Remove the spring, then slacken the two set screws and remove the tension from main body drive belt. (5) Remove the three set screws, then remove the fixing drive plate.
(6) Re-install the main motor unit in the opposite sequence to removal.
2. Replacing the paper feed drive shaft and Fixing input gear
a. Procedure (1) Remove the main motor unit. (2) Remove the E ring.
Set screws
Fixing drive plate
Fixing input gear Spring
Set screws (Slacken.) Main body drive belt E ring
Main motor unit
Caution: Be careful not to lose the poly-slider when installing the fixing drive plate. (6) Remove the fixing input gear. (7) Remove the four set screws, then remove the paper feed drive plate.
3-D-2
DRIVE SECTION
[4] M1 (main) Control
Set screws Paper feed drive plate Poly-slider
40VDC PGND
88-1 88-5
99-1 99-5
40VDC 202-1 PGND 202-2 5VDC 203-1
DCPS1
Fixing input gear
M1 CONT 30-A5 30-A7 M1 CLK 65-B11 90-A5 90-A7 75-B11 M1 ACK
M1 CONT 203-3 M1 ACK 203-4 SGND 203-5 M1 CLK 203-6
M1
CB
DCDB
(8) Remove the bearing, poly-slider and paper feed input gear. (9) Remove developing drive gear, then pull out the pin remaining on the shaft. (10) Remove the paper feed drive shaft.
M1 (main) is controlled by the CB (control board) via the DCDB (DC driver board).
1. Operation
M1 is a 40 V drive DC motor which drives the ADU paper exit/conveyance, toner recycle, conveyance, 2nd paper feed and fixing sections. M1 is PLL-controlled by feedback signals from a speed sensor installed inside M1 itself, maintaining it at a constant speed. M1 goes ON when the Copy button is pressed, and goes OFF again when the final copy has been exited. If the upper fixing roller fails to reach the set temperature within the specified time from the start of warmup, M1 remains ON until the completion of warmup.
Bearing
developing drive gear
Poly-slider
Paper feed input gear
2. Signals
Paper feed drive shaft
a. Input signal (1) M1 ACK (M1 DCDB CB) [L] is output when M1 reaches the specified temperature. b. Output signals (1) M1 CONT (CB DCDB M1) M1 drive control signal [L]: M1 ON [H]: M1 OFF (2) M1 CLK (CB DCDB M1) M1 rotational speed control reference clock signal
(11) Re-install the paper feed drive shaft and fixing input gear in the opposite sequence to removal.
3-D-3
DRIVE SECTION
[5] M4 (drum) control
24VDC PGND
88-3 88-7
99-4 99-7
24VDC 200-A1 PGND 200-A2 5VDC 200-A3
DCPS1
SGND 200-A4 M4 CONT 200-A5 M4 H/L 200-A6 M4 LD 200-A7
M4
M4 CONT 30-A10 M4 H/L 30-A11 30-A12
90-A10 90-A11 90-A12 M4 LD
CB
DCDB
M4 (drum) is controlled by the CB (control board) via the DCDB (DC driver board).
C
1. Operation
M4 is a 24 V drive DC motor which drives the drum and the cleaning guide roller. M4 is PLL-controlled by reference Signal and feedback signal from a speed sensor installed inside M4 itself, maintaining it at a constant speed. M4 goes ON when the Copy button is pressed, and goes OFF again when the final copy has been exited.
2. Signals
a. Input signal (1) M4LD (M4 DCDB CB) [L] is output when M4 reaches the specified speed. b. Output signals (1) M4CONT (CB DCDB M4) M4 drive control signal [L]: M4 ON [H]: M4 OFF (2) M4 H/L (CB DCDB M4) M4 rotational speed switchover signal Normally [H]: 280 mm/sec
3-D-4
READ SECTION
READ SECTION
[1] Composition
Optics unit CCD unit Front Optics drive wire Optics cooling fan (FM2)
V mirror unit (2nd and 3rd mirrors)
A/D converter board (ADB)
Optics rail (R)
[2] Mechanisms
Mechanism Light source Exposure Scanning Lamp power supply Cooling of optics Method Halogen lamp (170 W) Light source shift slit exposure 1st, 2nd and 3rd mirror shift Lamp cord Cooling of intake air using a fan
C
[3] Disassembly and Re-assembly
1. Screws that must not be removed
a. The 16 set screws of the CCD unit
Screws that must not be removed Screws that must not be removed
A/D converter board (ADB)
Screws that must not be removed Screws that must not be removed
C
Note: Two screws are behind the ADB in the figure above.
3-E-1
READ SECTION
2. Removing and Re-installing the CCD Unit
Caution: Be sure that the power cord has been unplugged from the power outlet. Caution: Be sure to perform image adjustment after installing the CCD unit. (For details, refer to "Adjustment section".) a. Procedure (1) Remove the glass holder plate, original stopper plate, platen glass and upper cover (center). (2) Remove the two set screws, then remove the glass stopper plate.
Set screws
(4) Remove the eight set screws, then remove the lens light blocking cover 1.
Set screws
Set screws Set screws
Lens light blocking cover 1
(5) Disconnect the connector (CN49). (6) Remove the eight set screws, then remove the fan mounting plate.
Connector (CN49) Glass stopper plate
Set screws
(3) Remove the two set screws, then remove the lens light blocking cover 2.
Set screws Set screws Set screws
Fan mounting plate
Lens light blocking cover 2
3-E-2
READ SECTION
(7) Disconnect the two connectors (CN420 and 412).
C
3. Replacing the Exposure Lamp
Caution: 1. Be sure that the power cord has been unplugged from the power outlet. 2. DO NOT touch the glass of the exposure lamp with bare hands. Caution: 1. Be sure to install the exposure lamp with the maker's mark facing the front side of the main body. 2. The nipple on the exposure lamp must face the paper feed side. 3. Be sure to check the image after installing the exposure lamp. (For details, refer to "Adjustment section".)
Electronic RDH
Connector (CN420) Connector (CN412)
(8) Remove the two set screws, then remove the CCD unit.
a. Procedure (1) Remove the glass holder plate, original stopper plate, platen glass and the upper cover (center). (2) Move the exposure unit to the notch on the main frame fitted on the paper exit side. (3) Remove the two set screws, then remove mirror support plate 2.
Mirror support plate 2
Set screws Reflector mirror 1
Exposure lamp
CCD unit Spring Lamp terminal Set screws
(9) Re-install the CCD unit in the opposite sequence to removal.
(4) To prevent the exposure lamp from dropping out, insert a sheet of paper from beneath reflector mirror 1 and wrap it around the exposure lamp. (5) Remove the spring, then slide the lamp terminal to the rear and remove the exposure lamp. (Lift out the lamp while holding it with the paper that you wrapped around it.) (6) Re-install the exposure lamp in the opposite sequence to removal.
3-E-3
READ SECTION
4. Removing the exposure unit
Caution: Be sure that the power cord has been unplugged from the power outlet. Caution: 1. Use a wire positioning jig when installing the exposure unit. (For the method of installing this jig, refer to the sub-section describing the method of installing the exposure unit.) 2. Be sure to perform image adjustment after installing the exposure unit. (For details, refer to "Adjustment section".) a. Procedure (1) Remove the glass holder plate, original stopper plate, platen glass and upper cover (center). (2) Remove the seven set screws, then remove the operation panel and disconnect the five connectors (CN10, 212, 213, 383 and 414).
Connector (CN414) Connector (CN383) Set screws Connector (CN10) Connector (CN212) Set screw Connector (CN384)
Set screws Wiring fixing plate Set screws
Exposure unit
5. Installing the Exposure Unit
Caution: 1. Use a wire positioning jig when installing the exposure unit. 2. Be sure to perform image adjustment after installing the exposure unit. (For details, refer to "Adjustment section".) a. Procedure (1) Insert the jig into the exposure unit mounting position from the front. (2) Slide the exposure unit to the paper feed side until it touches the jig. (3) Install the exposure unit on the optics wire using the four set screws.
Operation panel Set screws
Connector (CN212)
(3) Move the exposure unit to the notch in the main body frame on the paper exit side. (4) Remove the set screw, then remove the wiring fixing plate and disconnect the connector (CN384). (5) Remove the four set screws, then remove the exposure unit.
Exposure unit
Jig
3-E-4
READ SECTION
6. Installing the optics wire
Caution: 1. When winding the wire around the pulley, be sure to run the wire tightly to ensure that it does not ride up the side of the pulley. 2. Be sure to perform image adjustment after replacing or re-installing the wire. (For details, refer to "Adjustment section".) a. Procedure (1) Remove the exposure unit. (2) Remove the glass stopper plate. (3) Remove the six set screws, then remove the front door. (4) Disconnect the three connectors (CN41, 381 and 388). (5) Remove the five set screws, then remove the front cover.
Connector (CN388) Connector (CN41)
(6) Move the V mirror unit to the paper feed side, then insert the jigs from the front so as to fix the V mirror unit. Ensure that the jigs pass through the V mirror unit. (7) Insert the jigs to the exposure unit mounting position from the front.
Exposure unit
V mirror unit
Connector (CN381)
Front cover
Jig
Set screws Set screws Set screws Set screws Front door Set screws
3-E-5
READ SECTION
(8) The exposure unit mounting piece is installed on the optics wire in advance. The position of the mounting piece differs depending upon whether it is on the front or the rear wire. Use the wire that has the shorter length from the metal bead at the end to the mounting piece, at the rear. (9) Place the metal bead at the mid-point of each optics wire in the mounting hole of the drive pulley, then wind five turns around the pulley to the outside, and four turns to the inside, starting from this point.
Caution: 1. Ensure that there is a metal bead at the end of the outer wire, and a wire terminal at the end of the inner wire. 2. Pull out the outer wire from the top of the drive pulley in the paper exit direction, and pull out the inner wire from the bottom of the drive pulley in the paper feed direction.
Five turns Four turns Front Metal bead
Four turns
9
9
Five turns Wire stopper Rear Metal bead
Metal bead
10
Pulley 1 Drive pulley
Optics wire (rear)
V mirror unit
Pulley
11
Metal bead Rear
it un ce ure g pie s po in Ex ount m Metal bead
Wire stopper
Pulley 3
Spring Optics wire (front) Wire stopper V mirror unit Pulley 2 Spring fixing plate
13
Set screws
10
Spring fixing plate Metal bead Wire stopper
C
Metal bead
Exposure unit mounting piece
Lug terminal
8
Pulley V mirror unit
Short
Metal bead
Optics wire (rear)
11
Long
Optics wire (front)
3-E-6
READ SECTION
(10) After winding the outer wire, fix it to the wire stopper via the outer side of pulley 1 and the V mirror pulley. Note: There are two grooves in the wire stopper. Ensure that the outer groove is at the rear and the inner groove at the front. (11) Pass the inner wire through the notch in the wire stopper, reverse it at pulley 2, then pass it around the inside of the V mirror pulley and also around pulley 3, in that sequence, and attach the wire terminal to the spring fixing plate. At this time, temporarily fix the spring fixing plate with the set screw. (12) Install the other wire using the same procedure. (13) Slacken each screw that was temporarily fixed, then install the spring on the spring fixing plate and fix the each screw once again.
[4] M12 (optics drive) Control
M12 CLK 223-1 223-2 M12 MODE 0 M12 MODE 1 M12 MODE 2 M12 F/R M12 CONT M12 BRAKE M12 NCR 223-3 223-4 223-5 223-6 223-7 223-8 223-9 223-10 224-1 224-2 224-3 224-4 224-5 224-6 224-7 224-8 224-9 224-10 M12 LD M12 DIR M12 DRIVE C 225-1 M12 DRIVE A 225-2 M12 DRIVE B 225-3 M12 MAG A' 228-1 M12 MAG A 228-2 M12 MAG B' 228-3 M12 MAG B 228-4 M12 MAG C' 228-5 M12 MAG C 228-6 SGND 228-7 5VDC 228-8 M12 FG 228-9
M12
226-5 226-1 226-2 226-3 226-4
78-1 SGND 78-2 40VDC 78-3 PGND 78-4 24VDC 78-5 PGND
OPMDB
5VDC PS3 9-A3 9-A4 72-3 72-2 73-3 PS4 9-A5 73-2 66-3 PS5 9-A6 66-2 74-3 PS7 5VDC PS1 9-A7 9-B8 22-A2 74-2 77-3 77-2 67-3 PS8 22-A4 67-2 76-3 PS2 9-A2 76-2
DCPS1
PS3 PS4 PS5 PS7 PS1 PS8 PS2
CB
M12 (optics drive) is driven by the OPMDB (optics motor drive board), and is controlled by the CB (control board). Related signals are PS1 (optics overrun), PS2 (optics ADFEE), PS3 (shading), PS4 (paper restart), PS5 (optics return), PS7 (optics timing) and PS8 (platen glass sensor).
1. Operation
a. Operation of M12 M12 is a 3-phase brushless DC motor which is driven using a 3-phase bipolar method. The current flowing through the windings is switched according to the position of the rotor which is detected by a sensor (magnetic sensor) inside the motor.
3-E-7
READ SECTION
b. Scanning operation of the exposure unit Scanning speed Magnification Forward Return c. Position of each sensor Scanning speed 280 mm/sec (life size) 1520 mm/sec
f. Other operations (1) During copying a) When manual density has been selected 1 During a platen copy operation
(Setting a original)
(Exposure unit)
Exposure scan Press Copy button
PS3
PS7
PS5
PS4
PS2
PS1
d. Home position sensor of the exposure unit If the exposure unit is not in the home position when the main switch is turned ON, M12 rotates at low speed in the reverse direction until PS7 (optics sensor) and PS5 (optics return) are turned ON, thus detecting the fact that the optics unit is in the home position. e. Shading correction read operation At the position where PS3 (shading) goes ON, the light reflected from the white reference plate installed underneath the glass stopper plate is read.
2 During an ADF copy operation
(Original conveyance) (Exposure unit)
1st original feed Stop 2nd original feed Stop
Exposure scan
Exposure scan
PS3
Home position (PS7 and PS5 ON)
Shading correction read operation
b) EE mode 1 During a platen copy operation
L1 ON
(Setting a original)
(Exposure unit)
Copy button pressed
EE scan
L1 OFF
Exposure scan
3-E-8
READ SECTION
2
During an ADF copy operation (1-1)
(Exposure unit)
b) EE mode
(Original conveyance) (Exposure unit)
(Original conveyance) 1st original feed
Prescan Stop Stop 2nd original feed Stop Stop EE scan Exposure scan EE scan Exposure scan
Copy button pressed
EE scan
Exposure scan (rear half)
Exposure scan (front half)
3
During an ADF copy operation (1-2, 2-1, 2-2)
(Exposure unit) EE scan Stop Stop Stop Exposure scan
2. Signals
a. Input signals (1) PS1 (PS1 CB) Exposure unit overrun detection signal [L]: The exposure unit is in the overrun position. [H]: The exposure unit is not in the overrun position. (2) PS2 (PS2 CB) The brake is applied to M12 after the specified period from when PS2 goes ON during the return scan of the exposure unit. Also, when the ADF (1-1 mode) is used, EE read starts when PS2 goes ON. [L]: Exposure unit detected [H]: Exposure unit not detected (3) PS3 (PS3 CB) White reference plate read position detection signal [L]: The exposure unit is in the white reference plate read position. [H]: The exposure unit is not in the white reference plate read position. (4) PS4 (PS4 CB) The timer that determines the 2nd paper feed start timing starts when PS4 goes ON during the forward scan of the exposure unit. [L]: Exposure unit detected [H]: Exposure unit not detected (5) PS5 (PS5 CB) This signal is used to detect the return position and also the home position of the exposure unit. [L]: Exposure unit detected [H]: Exposure unit not detected (6) PS7 (PS7 CB) This signal is used to detect the return position and also the home position of the exposure unit. [L]: Exposure unit detected [H]: Exposure unit not detected (7) PS8 (PS8 CB) This signal is used to detect the original glass is set or not. [L]: Original glass detected [H]: Original glass not detected
(Original conveyance) 1st original feed
2nd original feed Stop EE scan
Exposure scan
(2) Book copy mode a) When manual density has been selected
(Setting a original) (Exposure unit)
Exposure scan (rear half) Copy button pressed
Exposure scan (front half)
C
3-E-9
READ SECTION
(8) M12 DIR (OPMDB CB) M12 rotational direction detection signal [L]: Reverse rotation (return operation) [H]: Forward rotation (forward operation) (9) M12LD (OPMDB CB) [H] is output when M12 reaches the specified speed. (10) M12 MAG A/A' (M12 OPMDB) M12 MAG B/B' (M12 OPMDB) M12 MAG C/C' (M12 OPMDB) These are the output signals from the sensors (magnetic sensors) contained in M12. OPMDB detects the position of the rotor of the motor by means of these signals, and switches over the M12 DRIVE A to C output. (11) M12 FG (M12 OPMDB) This is a feedback signal from the rotational speed sensor contained in M12. It is compared with the M12 CLK signal from the CB, and the output voltage adjusted so that the feedback signal becomes the same as the M12 CLK signal, thus controlling the rotational speed of M12. b. Output signals (1) M12 DRIVE A, B, C (OPMDB M12) This is the M12 drive signal. While M12 is rotating, voltages are output sequentially from M12 DRIVE A to C, and applied to M12. The voltage from each output that is applied to M12 consists of the pulses shown below. The pulse width of this output changes according to the rotation condition of M12, as shown in the figure, and as a result the RMS value of the voltage applied to M12 changes, causing the speed to be regulated. M12 DRIVE A M12 DRIVE B M12 DRIVE C
(5) M12 BRAKE (CB OPMDB) M12 brake control signal (6) M12 NCR (CB OPMDB) M12 brake control signal (7) M12 MODE 0, 1, 2 (CB OPMDB) M12 rotational speed control signal Eight rotational speed modes are activated by combinations of these three signals.
(2) M12 CONT (CB OPMDB) M12 ON/OFF control signal [L]: M12 ON [H]: M12 OFF (3) M12 CLK (CB OPMDB) M12 rotational speed control reference clock signal (4) M12 F/R (CB OPMDB) Signal used to control the rotational direction of M12 [L]: Forward operation [H]: Return operation
3 - E - 10
READ SECTION
[5] Exposure control
2. Signals
a. Input signals (1) L1 FB (DCPS2 CB) This signal informs the CB of the lit or unlit state of L1. [L]: L1 ON [H]: L1 OFF or broken (2) RL1 INHIBIT (DCPS2 CB) This signal turns OFF RL1 if an abnormality occurs in the machine. [L]: Abnormal [H]: Normal b. Output signal (1) L1 CONT (CB DCPS2) This is a control signal which turns L1 ON and OFF. [L]: L1 ON [H]: L1 OFF (2) L1 DRIVE1, 2 (DCPS2 L1) L1 drive signal (3) RL1 DRIVE (CB DCPS2 RL1) This signal controls RL1. This signal becomes [H] and turns off RL1 if an abnormality occurs in the machine.
L1 CONT 60-A2 60-A4 60-A1 RL1 DRIVE 60-B8
29-2 29-4 29-1 29-8 L1 FB RL INHIBIT
AC (H) 380-1 AC (C) 380-4
AC (H) AC (C)
f1
L1 DRIVE 1 385-3 L1 DRIVE 2 385-1
L1
CB
24VDC 29-9 RL1 29-10
RL1
DCPS2
Power is supplied to L1 (exposure) from the CVR (exposure lamp regulated power supply) in DCPS2 (power supply unit 2), and is controlled by the CB (control board).
1. Operation
a. L1 light intensity control The light intensity from L1 is determined by the output voltage from the CVR circuit in DCPS2. Rated output: 60 VDC b. Protection from abnormality * Hardware timer circuit If L1 remains ON continuously for at least 40±8 seconds for some reason or other, the hardware timer in the CVR of DCPS2 operates, turning OFF RL1 (main). As a result, current to the AC loads including L1 is cut off. * Temperature fuse If L1 exceeds a certain temperature, f1 (optics temperature fuse) melts, cutting off the current to L1. (f1 melting temperature: 121°C)
3 - E - 11
READ SECTION
[6] Original Read Control
481-A1 425-A1 420-40 411-1
[7] APS Control
5VDC PS6 9-B8 9-B4 146-3 146-2 143-3 PS44 9-B5 143-2 137-3 PS45 5VDC PS40 9-B7 22-A5 22-A6 137-2 133-3 133-2 134-3 PS41 420-1 411-40 PS42 22-B1 22-A8 134-2 130-3 130-2 138-3 PS43 22-B2 138-2
PS6 PS44 PS45 PS40 PS41 PS42 PS43
CCD
481-A12 481-B1 425-A12 425-B1
ADB
481-B12
425-B12
CB
IPB
CB
The original is read by the ADB (A/D converter board) and the CCD sensor installed on the ADB.
1. Operation
The light reflected off the exposed original passes through a lens to the CCD sensor. The analog voltages that correspond to the input light intensity are A/D-converted in the ADB, and output to the IPB (image processing board). a. Original read operation The original read timing is as follows. (1) During a platen copy operation When PS4 (paper feed restart) goes ON. (2) During an ADF copy operation When the exposure unit is +2 mm toward the paper feed side from the position at which PS4 goes ON.
APS takes place as a result of the signal read by the APS sensor being sent to the CB (control board) when the original cover is opened and closed. Related signals are PS45 (APS timing 1) and PS44 (book detection).
1. Operation
a. APS detection operation APS detection is an operation that detects the paper size according to the particular ON/OFF combination of PS40 (APS (short)), PS41 (long)), PS42 (APS (inner)) and PS43 (APS (outer)). The APS sensor consists of LEDs and photosensors. APS detection takes place as a result of the light emitted from each LED being reflected off the original and received by the photosensor.
Paper exit side
PS42 PS43
Photosensor LED
3 - E - 12
PS40 PS41
READ SECTION
The relation between each sensor and the paper size is shown below. APS sensor Paper size A3 B4 A4R B5R A4 B5 C PS40 ON ON ON OFF OFF OFF C PS41 ON ON OFF OFF OFF OFF C PS42 ON ON OFF OFF ON ON C PS43 ON OFF OFF OFF ON OFF
(5) PS45 (PS45 CB) Original cover opening/closing detection signal Activates or deactivates the APS function. [L]: ON (APS function activated) [H]: OFF (APS function deactivated)
ADF(DF-306) PS45 goes ON
b. APS detection timing APS detection takes place when PS45 goes ON or PS44 goes OFF. APS detection stops when PS45 goes OFF or PS44 goes ON.
2. Signals
a. Input signals (1) PS40 (PS40 CB) Paper size detection signal [L]: Paper is detected. [H]: Paper is not detected. (2) PS41 (PS41 CB) Paper size detection signal [L]: Paper is detected. [H]: Paper is not detected. (3) PS42 (PS42 CB) Paper size detection signal [L]: Paper is detected. [H]: Paper is not detected. (4) PS43 (PS43 CB) Paper size detection signal [L]: Paper is detected. [H]: Paper is not detected.
(6) PS44 (PS44 CB) Original cover state detection signal This signal is used to detect the raised state of the rear part of the original cover when a book or other thick original is being copied. When the rear part of the original cover is in a raised state, PS44 is OFF, and [H] is output. [L]: ON (APS function deactivated) [H]: OFF (APS function activated)
3 - E - 13
READ SECTION
[8] EE Control
481-A1 425-A1 420-40 411-1
C
(2) ADF mode (1-1) The read operation takes place from the point at which PS2 (ADF-EE) goes ON during the return scan of the exposure unit, either while the original is being conveyed through the ADF or after the original has been placed in it. (B5R width20) × L
CCD
481-A12 481-B1 425-A12 425-B1
ADB
420-1
411-40
B5R width 20
481-B12
425-B12
CB
IPB
S
L
C
EE control takes place during an EE scan as a result of the CCD sensor reading the original density and selecting the most suitable copy correction curve. EE processing is done by the IPB (image processing board).
L: Document travelling distance while the exposure unit moves between PS2 sensor and PS5/PS7 sensors in back-scan operation. S: Scan-start position varies with magnification ratio. (3) ADF mode (1-2, 2-1, 2-2) The density of the original is read during the EE scan after the original has been placed in the ADF. (B5R width20) × (B5R width20)
C
1. Operation
a. EE detection operation (1) During a platen copy operation When the Copy button is pressed, an EE scan takes place, and the density is measured over the range shown below. With APS detection: (Document width20) × (Document length20) Without APS detection: (B5R width20) × (B5R width20)
B5R width 20
10mm B5R width 20
10 mm
3 - E - 14
WRITE UNIT
WRITE UNIT
[1] Composition
Index mirror Collimator lens unit 1 Index sensor board Cylindrical lens 2
3rd mirror Polygon mirror
Laser driver board 1
Cylindrical lens 1 f lens Laser driver board 2
C
Collimator lens unit 2 2nd mirror
Polygon driver board
Beam combining prism
[2] Mechanisms
Mechanism *1 Scan Light source *2 Positioning *3 Laser beam combining Method Polygon mirror (Rotational speed: 16535 rpm) Laser diodes (two) (Output: Max 15 mW) Index sensor fine adjustment prism Beam combining prism
C
CY2 lens Polygon mirror f lens unit 2nd mirror 3rd mirror
Stepping motor CY1 lens Compression prism Semiconductor laser LD1 Glass cover Index mirror Beam combining prism Fine adjustment prism Compression prism Collimator lens unit
C
*1: Path of laser beam The light output to each semiconductor is sent to the OPC drum via the collimator lens, compression prism, fine adjustment prism, beam combining prism, cylindrical lens 1, polygon mirror, f lens, 1st mirror, 2nd mirror, cylindrical lens 2, and the 3rd mirror.
Index senser OPC drum 3rd mirror
Fine adjustment prism
Semiconductor laser LD2 2nd mirror 1st mirror
3-F-1
WRITE UNIT
C
*2: Positioning Each laser beam is positioned by the compression prism and the fine adjustment prism. This is adjustable not in field,but only in factory. *3: Combining the laser beams The two laser beams are output at right angles with respect to each other. The beam combining prism causes them to be output in the same direction.
[3] Disassembly and Re-assembly
1. Removing and Re-installing the Write Unit
Caution: Be sure that the power cord has been unplugged from the power outlet. Warning: (1) Do not energize the write unit when it is not in the correct position. (2) Do not remove the cover from the write unit other than to clean the polygon mirror. If the laser beam gets into your eyes, you may lose your sight. a. Procedure (1) Remove the glass holder plate, original stopper plate and platen glass.
Set screws
Semiconductor laser 1
Beam combining prism Board cover Semiconductor laser 2
(2) Remove the two set screws, then remove the board cover. (3) Remove the 13 set screws, then remove the board protection cover.
Set screws
Set screws Board protection cover Set screws
Set screws Set screws
3-F-2
WRITE UNIT
(4) Disconnect the four connectors (CN421, 422, 423 and 424) from the image processing board (IPB).
Image processing board (IPB)
(7) Disconnect the connector (CN95). (8) Slacken the two set screws, then pull out the write unit.
Write unit
Connector (CN95)
Connector (CN424)
Connector Connector (CN421) (CN422) Connector (CN423)
Set screws
(5) Slacken the four set screws, then remove the upper cover on the right side. (6) Remove the eight set screws, then remove the write unit cover.
(9) Re-install the write unit in the opposite sequence to removal.
2. Cleaning the polygon mirror
a. Procedure (1) Remove the write unit. (2) Remove the five set screws, then remove the write unit cover.
Write unit cover
Set screws
Set screws
Write unit cover
Set screws
Set screws
Set screws
3-F-3
WRITE UNIT
(3) Remove the three set screws, then remove the polygon mirror cover.
(4) Remove the set screw, then remove board support piece 1. (5) Remove the two set screws, then pull out and remove the electronic RDH.
C
Set screws Electronic RDH Board support piece 1
Polygon mirror cover Set screws
(4) Immerse a cotton stick in a 1:1 mixture of iso-propyl alcohol and acetone, then use it to clean the eight faces of the polygon mirror. Caution: Take care not to scratch the polygon mirror when cleaning it.
Set screw
(6) Re-install the electronic RDH in the opposite sequence to removal.
3. Removing and Re-installing the Electronic RDH
Caution: Be sure that the power cord has been unplugged from the power outlet. a. Procedure (1) Remove the top cover on the left side. (2) Disconnect the connector (CN49). (3) Remove the eight set screws, then remove the fan mounting plate.
Connector (CN49)
Set screws
Set screws
Set screws
Fan mounting plate
3-F-4
WRITE UNIT
[4] M5 (polygon) Control
2. Signals
a. CB output signals (1) M5 CONT (CB PMDB) This signal controls the ON/OFF state of M5. L: M5 ON H: M5 OFF (2) M5 CLK (CB PMDB) This is a reference clock signal for PLL-controlling M5 in the PMDB. b. CB input signal (1) M5 RDY (PMDB CB) This signal indicates the rotation condition of M5. L: Specified rotational speed H: If the specified speed has not been reached c. PMDB input signal (1) M5 MAG A/A' (M5 PMDB) (1) M5 MAG B/B' (M5 PMDB) (1) M5 MAG C/C' (M5 PMDB) These are output signals from the position sensors (magnetic sensors) contained in M5. The PMDB detects the position of the rotor of the motor by means of these signals, and switches over the M12 DRIVE A to C output. d. PMDB output signal (1) VMAG- (PMDB M5) GND line to the rotor position sensors (magnetic sensors) contained in M5 (2) M5 DRIVE A to C (PMDB M5) This is the drive output signal for M5. While M5 is rotating, voltages are output sequentially from M12 DRIVE A to C, and applied to M5. The voltage from each output that is applied to M5 consists of the pulses shown below. The pulse width of this output changes according to the rotation condition of M5, as shown in the figure, and as a result the RMS value of the voltage applied to M5 changes, causing the speed to be regulated. M5 DRIVE A M5 DRIVE B M5 DRIVE C
M5 CONT 200-B2 M5 CLK 200-B3 200-B4 PGND 200-B5 24VDC 200-B7
320-2 320-3 320-4 M5 RDY 320-5 320-7
M5 DRIVE A M5 DRIVE B M5 DRIVE C M5 MAG A' M5 MAG A M5 MAG B' M5 MAG B M5 MAG C'
321-1 321-2 321-3 321-5 321-6 321-7 321-8 321-9
M5
M5 MAG C 321-10 V MAG - 321-11
CB
PMDB
M5 (polygon) is driven by the PMDB (polygon driver board), and is controlled by the CB (control board).
1. Operation
a. M5 is a 3-phase brushless DC motor which is driven using a 3-phase bipolar method. The current flowing through the windings is switched according to the position of the rotor which is detected by a sensor (magnetic sensor) inside the motor. This motor rotates the polygon mirror, causing the laser beams from LDB1 and 2 (laser diode boards 1 and 2) to be scanned in the axial direction of the drum. The speed of the motor is maintained constant by PLL control. b. M5 is powered by 24 VDC. The rotational speed is as follows. State of the machine During copy Rotational speed High speed (16,535 rpm) One of the following four speeds can be selected using the "25" mode. · 14,000 rpm * · 11,024 rpm * · 8,000 rpm * · Stop *
C
During idling
C
* If the item marked * is selected, the rotational speed of M5 switches over after the lapse of the specified time from the end of the copy process. The specified time can be selected using the "25" mode among below. (15 sec, 30 sec, 60 sec, 120 sec)
3-F-5
WRITE UNIT
[5] Image Write Control
425-A2 RESET 425-A3 425-A4 425-A5 MEE V/V M V/V M CLK CHG DCORR 425-A6 425-A7 425-A8 425-A9
481-A2 481-A3 481-A4 481-A5 481-A6 481-A7 481-A8 481-A9 481-A10 481-B1 481-B2 481-B3 481-B4 481-B6 481-B7 481-B8 481-B9
IP REQ
M40 PWR A M40 PWR B
424-1 424-2 424-3 424-4 424-5 424-6
INDEX TXA 1
M40 DRIVE A M40 DRIVE A' M40 DRIVE B M40 DRIVE B'
M40
LD1 APC CONT 1 LD1 APC CONT 2 IPB LD1 VIDEO LD1 ALM TXA 0 LD1 IRCLK LD1 INC
421-3 421-4 421-5 421-7 421-8 421-9
440-3 440-4 440-5 440-7 440-8 440-9 440-10 440-11 440-12
I YOBI 1 425-A10
CB
RXA 0
425-B1 425-B2 425-B3 RXA 1 MTN V/V MAPC CAL MIND CHG CORR 425-B4 425-B6 425-B7 425-B8 425-B9 425-B10
LDB1
LD1 U/D 421-10 LD1 C/S 421-11 LD1 LPR 421-12
481-B10 O YOBI 1
LD2 APC CONT 1 LD2 APC CONT 2 LD2 VIDEO
422-3 422-4 422-5 422-7 422-8 422-9
441-3 441-4 441-5 441-7 441-8 441-9 441-10 441-11 441-12
442-3
423-3 423-5 423-7 423-9 423-11 423-12
M INDEX 1 M INDEX 2 S INDEX 1 S INDEX 2 HLVL IPR
LD2 ALM LD2 IRCLK LD2 INC
INDEXSB
442-5 442-7 442-9
LDB2
LD2 U/D 422-10 LD2 C/S 422-11 LD2 LPR 422-12
450-A1
428-B1
420-40
411-1
E-RDH (OPTION)
450-A50 450-B1
RDH IFB
428-B50 428-A1 420-1 411-40
ADB
450-B50
428-A50
IPB
C
The analog image data from the CCD sensor is A/D-converted by the ADB (A/D converter board), then sent to the IPB (image processing board) where it is data-processed. The processed image data is converted into laser beam and applied to the drum with the control signals from the CB. There are two lasers which are used to write two lines of image data in a single scan. The write start position of each laser is detected by the INDXSB (index sensor board). The E-RDH (electronic RDH) can store digitized image data. Various editing functions can be carried out based on this data.
1. Operation
a. Image processing The following processing is done by the IPB (image processing board). (1) Shading correction a) White correction * When the machine is switched ON * When the front door or the side door is opened and closed * Every 1000 copies b) Black correction * When the Copy button is pressed (2) Brightness/density conversion (3) EE processing (4) Text/dot pattern judgement (5) Filtering (6) Magnification change processing (7) Copy correction (8) Write density control
3-F-6
WRITE UNIT
The following processing is performed by the E-RDH (electronic RDH processing board). a) Error diffusion processing b) Data compression The write operation takes place under instructions from the CB after the above processing has been completed. b. Write The IPB (image processing board) sends image data one pixel at a time to LDB1 and LDB2 in accordance with control signals from the CB (control board). LDB1 and LDB2 cause the lasers to emit at a time period corresponding to the image data. This laser light is applied to the drum. (1) APC (automatic adjustment of laser beam intensity) The CB monitors the laser drive current at fixed intervals, and maintains the light intensity at the correct value. APC takes place at the following timing. a) Before Dmax/gradation correction b) When the Copy button is pressed c) After each two copies during a continuous copy operation d) When the front door is opened and closed.
C
C
C
C
Note: MPC MPC is the data (00-99 steps)stored in the NVRAM in main body, which determines LD output power to be adjusted later by APC. Can be read out by 47-036, 47-037. MPC value is sent from CB to IPB in case of a) or b) in (1). (2)Write Timing a) Axial direction of drum In this machine, the INDEX signal from INDEXSB determines the laser write start timing for each scan in the axial direction of the drum.
b) Direction of rotation of drum 1) When realtime output 1.When superfine mode is selected 2.1st copy in either normal or fine mode with platen mode or RADF(1-1)mode When PS4 (paper feed restart) goes ON 2) When data is output from the E-RDH memory When the copy paper reaches the specified position * In the case of paper feed from the tray, LCT or ADU: After the specified period from when PS18 (no feed) goes ON * In the case of by-pass paper feed: After the specified period from the start of bypass paper feed (3) Laser beam position correction a) Axial direction of drum The index sensor detects the deviation of the positions of the 2 beams. This error is corrected by changing the timing of the light emission from the laser. b) Direction of rotation of drum The index sensor detects the deviation of the positions of the 2 beams, and M40 (laser correction motor) changes the angle of the fine adjustment prism of laser LD1, thus adjusting the beam in the up-down direction.
2. Signals
a. CB output signals (1) MEE V/V (CB IPB) This signal determines the scanning area in the sub scanning direction during the pre-scanning operation (EE control). The period during which this signal is [L] is judged as the scanning range. (2) M V/V (CB IPB) This signal determines the scanning range in the sub scanning direction during the exposure scan. The period over which this signal is [L] is judged as the scanning range. (3) M CLK CHG (CB IPB) Clock frequency switching signal [H]: Low clock frequency [L]: High clock frequency (4) DCORR (CB IPB) Black data collection trigger signal used when shading correction is taking place (5) I YOBI 1 (CB IPB) Spare input port (6) RXA 0, 1 (CB IPB) Data that is transferred serially from the CB to the IPB (7) MTN V/V (CB IPB) This signal determines the patch output range in the sub scanning direction while Dmax is being measured. The period during which this signal is [L] is judged as the patch output range.
INDEX Laser ouintput Laser1 output 2
a b c
Image area
d e
1st scan
2nd scan
Symbol a b bc cd de
Description When laser goes ON during 1st scan When index sensor goes ON The timing at left is controlled by counting the LD1 IRCLK and LD2 IRCLK signals. It differs depending upon the paper size.
3-F-7
WRITE UNIT
C
C
(8) MAPC CAL (CB IPB) APC and PWM calibration trigger signal (9) MIND CHG (CB IPB) This signal selects the index signal. [H]: External index signal [L]: Internal index signal (10) CORR (CB IPB) White data collection trigger used when shading correction is taking place (11) RESET (CB IPB) Processing CPU reset signal (not used) b. CB input signal (1) IP REQ (IPB CB) Processing board communications enable signal (2) INDEX (IPB CB) Write system index signal (3) TXA 0, 1 (IPB CB) Data that is transferred serially from the IPB to the CB (4) MPR (IPB CB) Image processing board power supply monitoring signal (connector check) (5) O YOBI 1 (IPB CB) Spare output port
C C
C
C
C
(12) LD2 C/S (IPB LDB2) LD2 MPC signal (13) LD VIDEO (IPB LDB2) LD2 laser image data (14) LD2 IRCLK (IPB LDB2) LD2 APC clock signal (15) LD2 INC (IPB LDB2) LD2 MPC signal (16) LD2 U/D (IPB LDB2) LD2 MPC signal (17) HLVL (IPB INDEXSB) 5 VDC for monitoring power supply d. IPB input signals (1) LD1 ALM (LDB1 IPB) Signal which indicates an abnormality in the laser drive current [H]: Normal [L]: Abnormal (2) LD2 ALM (LDB2 IPB) Signal which indicates an abnormality in the laser drive current [H]: Normal [L]: Abnormal (3) M INDEX 1, 2 (INDEXSB IPB) Index signal for detection of main scanning skew (4) S INDEX 1, 2 (INDEXSB IPB) Index signal for detection of sub scanning skew (5) IPR (INDEXSB IPB) INDEXSB power supply monitoring signal (connector check) [H]: Normal [L]: Abnormal (6) LD1 LPR (LDB1 IPB) LD1 power supply monitoring signal (connector check) [H]: Normal [L]: Abnormal (7) LD2 LPR (LDB2 IPB) LD2 power supply monitoring signal (connector check) [H]: Normal [L]: Abnormal
C
C
C
C
C
C
c. IPB output signal (1) M40 PWR A (IPB M40) M40 A phase drive signal (2) M40 PWR B (IPB M40) M40 B phase drive signal (3) M40 DRIVE A/A' (IPB M40) M40 A phase drive pulse signal (4) M40 DRIVE B/B' (IPB M40) M40 B phase drive pulse signal (5) LD1 APC CONT 1, 2 (IPB LDB1) APC (laser light intensity automatic adjustment) LD1 takes place according to the combination these two signals. (6) LD1 C/S (IPB LDB1) LD1 MPC signal (7) LD1 VIDEO (IPB LDB1) LD1 laser image data (8) LD1 IRCLK (IPB LDB1) LD1 APC clock signal (9) LD1 INC (IPB LDB1) LD1 MPC signal (10) LD1 U/D (IPB LDB1) LD1 MPC signal (11) LD2 APC CONT 1, 2 (IPB LDB2) APC (laser light intensity automatic adjustment) LD2 takes place according to the combination these two signals.
C
of of
of of
3-F-8
DRUM UNIT
DRUM UNIT
[1] Composition
Charging corona unit Developing unit Drum
PCL
C
PCL Cleaning unit
Charging corona unit Separation claws Drum
Separation claw solenoid
Developing unit Cleaning unit
TSL
Transfer and separation corona unit
[2] Mechanisms
Mechanism Carriage supply PCL Auxiliary separation Method Fixed rail LED Separation claws
Separation claw
Drum
*1
Swing clutch
The drum unit of this machine is an integral assembly consisting of the drum, and also the charging corona unit, developing unit, cleaning unit, toner recycle unit and the PCL which are installed around the drum.
7mm
*1: Auxiliary separation Three separation claws separate the paper from the drum and prevent paper jamming. These claws are pressed against the drum or removed from it by the ON/OFF operation of the separation claw solenoid (SD4). Also, while the swing clutch installed in the swing block is turning one revolution, the separation claws slide about 7 mm, preventing a specific part of the paper from becoming dirty and also preventing the drum from being scratched.
Separation claw solenoid (SD4)
Swing block
3-G-1
DRUM UNIT
[3] Disassembly and Re-assembly
1. Removing and Re-installing the Drum Unit
Caution: Be sure that the power cord has been unplugged from the power outlet. Caution: 1. The drum in this machine is much more sensitive than the drums used in previous machines. Before pulling out the drum unit, therefore, be sure to place the drum cover over it and store the drum carriage in a dark place. 2. Be careful not to rotate the drum when installing or removing the drum unit. if you rotate the drum in the direction opposite to the direction in which it rotates during a copy operation, you risk damaging the cleaning blade. a. Procedure (1) Open the front door, slacken the set screw, release the lock plate of the toner supply unit, then pull forward the toner supply unit and fix it in place.
Drum cover
Conveyance lever
Set screws
Toner supply unit Set screw
(4) Remove the three set screws, then slowly pull forward the drum unit. (Raise the toner recycle unit then remove the set screw at the center of the drum.) Caution: There is a possibility of the drum rotating in reverse, so retain the cleaner idler gear to prevent the drum from rotating.
Set screws Toner recycle unit
Lock plate
(2) Release the conveyance lever. (3) Remove the two set screws, then remove the drum cover.
Drum unit Cleaner idler gear
(5) Re-install the drum carriage in the opposite sequence to removal.
3-G-2
DRUM UNIT
2. Removing and Re-installing the Drum
Caution: 1. Be careful not to touch the drum or the cleaning blade with bare hands, or damage these parts. 2. When leaving the drum to stand, be sure to place the drum cover over it and store it in a dark place. 3. When re-installing the drum, cleaning blade and guide roller, apply setting powder to the entire surface of the drum and also to the cleaning blade regardless of whether or not the parts are new or old types. In addition, apply toner to both ends of the cleaning blade. 4. After applying setting powder to the drum, carry out the following work before installing the drum unit on the main body. 1) To ensure that the toner density is correct, before installing the drum to the drum unit, discharge the surface of detection sensor and the Dmax sensor on the control board by using a piece of cloth moistened with alcohol, thus preventing toner from adhering to the sensors. 2) After installling the drum to the drum unit, with the charging corona unit and the developing unit removed, insert the centering jigs into both sides of the drum, then turn the drum one revolution. This prevents setting powder from scattering onto the charging corona unit, and other parts, and also prevents image defects. 5. Pay attention not to drop the blade spacer which is inserted to cleaning blade axis on the back side. 6. When installing the drum, be careful of the orientation of the drum. The end of the drum with the wider nonimage area is the front. 7. When installing a new drum, be sure to enter code 91 of the 47 mode and reset the drum counter. (For details, refer to "Adjustment section".) a. Procedure (1) Remove the drum unit from the main body. (2) Remove the charging corona unit, developing unit and cleaning blade from the drum unit. (For the sequence of removing these parts, refer to "Charging corona unit, Developing unit and cleaning/recycle unit section".) (3) Remove the cleaner idler gear and the drum fixing coupling.
C
Drum fixing coupling Cleaner idler gear
Drum
C
(5) Re-install the drum in the opposite sequence to removal.
C
3. Removing and Re-installing the Separation Claws
Caution: 1. Take care not to damage the drum when removing the separation claws. 2. Be careful of the direction and position of the separation claws when re-installing the claws. 3. Do not touch the cleaning blade or the drum with the bare hands. a. Procedure (1) Remove the drum carriage from the main body. (2) Remove the drum from the drum carriage. (3) Remove the spring. (4) Remove the three set screws, then remove the swing block and swing clutch. (5) Remove the separation claw unit.
C
C
C
Separation claw unit
Swing clutch
Note: Before removing the drum, in oder to prevent the toner from dropping, rotate the cleaner idler gear/B counterclockwise and remove the toner remaing between the drum and guide roller. If tne toner cannot be removed, rotate the drum clockwise a bit, then detach the drum keeping the toner on the place. (4) Gently lift out the drum while holding it at both ends to ensure that you do not damage the photosensitive surface.
Spring Swing block
Set screws
3-G-3
DRUM UNIT
(6) Remove the spring and the E ring from the separation claw unit. (7) Remove the three set screws of the claws (one screw each), then remove the three claws.
5. Removing and Re-installing the PCL
a. Procedure (1) Remove the charging corona unit. (Refer to "Corona unit section" for the method of removing the PCL.) (2) Disconnect the connector (CN20) from the drum board. (3) Press inward the hooks at the front and rear of the PCL cover, and remove the PCL.
Connector (CN20) Charging corona unit
Set screws
E ring
Charging wire cleaning motor (M7)
Separation claws Spring
(8) Re-install the separation claws in the opposite sequence to removal.
4. Removing and Re-installing the Separation Claw Solenoid Press-fit Ass'y
a. Procedure (1) Remove the drum unit from the main body. (2) Remove the drum and separation claw unit from the drum unit. (3) Disconnect the connector (CN34). (4) Remove the two set screws, then remove the separation claw solenoid press-fit ass'y.
(4) Re-install the PCL in the opposite sequence to removal.
Connector (CN34)
Separation claw solenoid press-fit ass'y
Set screws
(5) Re-install the press-fit ass'y in the opposite sequence to removal.
3-G-4
DRUM UNIT
[4] PCL/TSL Control
[5] Separation claw control
24VDC PCL CONT
5-A3 5-A4
21-5 21-6
24VDC PCL CONT
20-1 20-2
PCL
24VDC 5-B9
DB
SD4 DRIVE 5-B10
24VDC 62-B1 TSL CONT 62-B9
SD4
TSL
CB
CB
The PCL (precharging exposure lamp) and TSL (transfer sync exposure lamp) consist of LEDs which are controlled by the CB (control board).
C
The separation claws are driven by SD4 (separation claws), and are controlled by the CB (control board).
1. Operation 1. Operation
The PCL goes ON and OFF in synchronism with M1 (main), and TSL with M4(drum moter). During the separation discharge, SD4 goes ON, causing the separation claws to touch the drum in order to help separate the paper from the drum.
2. Signals
a. Output signals (1) PCL CONT (CB DB PCL) PCL ON/OFF control signal [L]: PCL ON [H]: PCL OFF (2) TSL CONT (CB TSL) TSL ON/OFF control signal [L]: TSL ON [H]: TSL OFF
2. Signals
a. Output signal (1) SD4 DRIVE (CB SD4) SD4 drive control signal [L]: SD4 ON [H]: SD4 OFF
3-G-5
DRUM UNIT
[6] Paper Guide Plate Control
24VDC 62-A1 PGND 62-A2
84-1 84-2 GP
GP CONT 62-B11
84-8
CB
HV1
A constant voltage is applied to the paper guide plate in order to prevent toner from adhering to it.
1. Operation
a. ON/OFF timing ON and OFF in synchronism with M4 (drum). b. Applied voltage -500 VDC
2. Signal
a. Output signal (1) GP CONT (CB HV1) Controlling ON/OFF of the voltage applied to the paper guide plate [L]: Voltage applied. [H]: Voltage not applied.
3-G-6
CORONA UNIT SECTION
CORONA UNIT SECTION
[1] Composition
Charging wire cleaning motor (M7) Charging corona unit
Drum board Plunging prevention plate
Charging wire cleaning knob
Separation corona unit PCL Transfer corona unit Transfer and separation wire cleaning motor (M8)
[2] Mechanisms
Mechanism Method Scorotron (DC negative corona discharge) *1 Charging Discharge wire: Tungsten 0.06 mm dia. Grid control: Stainless steel plate With automatically wire cleaner DC negative corona discharge *2 Transfer Discharge wires: Tungsten 0.06 mm dia. With automatically wire cleaner Separation AC corona discharge Discharge wires: Tungsten 0.06 mm dia. With automatically wire cleaner
*1: Cleaning the charging corona wires The charging corona unit has a wire cleaner. The charging wire cleaning motor causes the charging wire cleaning block to move back and forth, removing dirt from the wires.
Charging wire cleaning motor (M7) Charging wire cleaning block Charging wires
3-H-1
CORONA UNIT SECTION
*2: Cleaning the transfer and separation wires The transfer and separation corona unit has a wire cleaner. The transfer and separation wire cleaning motor causes the transfer and separation wire cleaning blocks to move back and forth, removing dirt from the wires.
Transfer and separation wire cleaning motor (M8) Transfer wire cleaning block
2. Removing and Re-installing the Transfer and Separation Corona Unit
Caution: Be sure that the power cord has been unplugged from the power outlet. a. Procedure (1) Open the front door, and release the conveyance lever. (2) Remove the set screw, then remove the transfer and separation corona unit cover.
Transfer and separation corona unit
Transfer wire Separation wire cleaning block
Separation wires
[3] Disassembly and Re-assembly
1. Removing and Re-installing the Charging Corona Unit
Caution: Be sure that the power cord has been unplugged from the power outlet. a. Procedure (1) Remove the drum unit from the main body. (2) Disconnect the connector (CN21). (3) Lift out the charging corona unit.
Conveyance lever
Set screw Transfer and separation corona unit cover
C
(3) Disconnect the connector (CN168). (4) Remove the set screw, then pull forward and remove the transfer and separation corona unit.
Charging corona unit
Set screw
Transfer and separation corona unit Connector (CN21)
Connector (CN168)
(5) Re-install the transfer and separation corona unit in the opposite sequence to removal. (4) Re-install the charging corona unit in the opposite sequence to removal.
3-H-2
CORONA UNIT SECTION
3. Removing and re-installing the Plunging Prevention Plate
a. Procedure (1) Remove the transfer and separation corona unit (2) Push in the six hooks at the rear of the back plate while grasping then with a pair of tweezers, and remove the plunging prevention plate.
(3) Remove dirt from the charging control plate by gently dabbing it with a piece of cloth moistened with drum cleaner, then remove any remaining dirt with a blower brush. (4) Re-install the charging control plate in the opposite sequence to removal.
5. Replacing Charging Wire Cleaning Block B
Plunging prevention plate
a. Procedure (1) Remove the charging corona unit. (2) Remove the charging control plate. (3) Remove the two set screws of the charging corona unit (front). (4) Lift out and remove charging wire cleaning block B together with the spark arrestor plate (front).
Spark arrestor plate (front) Hooks Charging wire cleaning block B
Set screw