Mita-Kyocera DC2050 SERVICE MANUAL
R
DC-2050
DC-2050
SERVICE
MANUAL
Published in Oct. ’99
841AF110
DC-2050 (MCE) S/M
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended
by the manufacturer. Dispose of used batteries according to
the manufacturer’s instructions.
CAUTION
Double-pole/neutral fusing.
SERVICE
MANUAL
DC-2050
R
Safety precautions
This booklet provides safety warnings and precautions for our service
personnel to ensure the safety of their customers, their machines as well
as themselves during maintenance activities. Service personnel are
advised to read this booklet carefully to familiarize themselves with the
warnings and precautions described here before engaging in
maintenance activities.
Safety warnings and precautions
Various symbols are used to protect our service personnel and
customers from physical danger and to prevent damage to their
property. These symbols are described below:
DANGER: High risk of serious bodily injury or death may result from
insufficient attention to or incorrect compliance with warning
messages using this symbol.
WARNING: Serious bodily injury or death may result from insufficient
attention to or incorrect compliance with warning messages
using this symbol.
CAUTION: Bodily injury or damage to property may result from
insufficient attention to or incorrect compliance with warning
messages using this symbol.
Symbols
The triangle (
and caution. The specific point of attention is shown inside
the symbol.
) symbol indicates a warning including danger
General warning.
Warning of risk of electric shock.
Warning of high temperature.
indicates a prohibited action. The specific prohibition is
shown inside the symbol.
General prohibited action.
Disassembly prohibited.
indicates that action is required. The specific action
required is shown inside the symbol.
General action required.
Remove the power plug from the wall outlet.
Always ground the copier.
1. Installation Precautions
WARNING
• Do not use a power supply with a voltage other than that specified.
Avoid multiple connections to one outlet: they may cause fire or electric
shock. When using an extension cable, always check that it is
adequate for the rated current. ...............................................................
• Connect the ground wire to a suitable grounding point. Not grounding
the copier may cause fire or electric shock. Connecting the earth wire
to an object not approved for the purpose may cause explosion or
electric shock. Never connect the ground cable to any of the following:
gas pipes, lightning rods, ground cables for telephone lines and water
pipes or faucets not approved by the proper authorities.........................
CAUTION
• Do not place the copier on an infirm or angled surface: the copier may
tip over, causing injury. ...........................................................................
• Do not install the copier in a humid or dusty place. This may cause fire
or electric shock......................................................................................
• Do not install the copier near a radiator, heater, other heat source or
near flammable material. This may cause fire. .......................................
• Allow sufficient space around the copier to allow the ventilation grills to
keep the machine as cool as possible. Insufficient ventilation may
cause heat buildup and poor copying performance................................
• Always handle the machine by the correct locations when moving it. ....
• Always use anti-toppling and locking devices on copiers so equipped.
Failure to do this may cause the copier to move unexpectedly or
topple, leading to injury. ..........................................................................
• Avoid inhaling toner or developer excessively. Protect the eyes. If toner
or developer is accidentally ingested, drink a lot of water to dilute it in
the stomach and obtain medical attention immediately. If it gets into the
eyes, rinse immediately with copious amounts of water and obtain
medical attention.....................................................................................
• Advice customers that they must always follow the safety warnings and
precautions in the copier’s instruction handbook. ...................................
2. Precautions for Maintenance
WARNING
• Always remove the power plug from the wall outlet before starting
machine disassembly. ............................................................................
• Always follow the procedures for maintenance described in the service
manual and other related brochures. ......................................................
• Under no circumstances attempt to bypass or disable safety features
including safety mechanisms and protective circuits. .............................
• Always use parts having the correct specifications. ...............................
• Always use the thermostat or thermal fuse specified in the service
manual or other related brochure when replacing them. Using a piece
of wire, for example, could lead to fire or other serious accident............
• When the service manual or other serious brochure specifies a
distance or gap for installation of a part, always use the correct scale
and measure carefully. ...........................................................................
• Always check that the copier is correctly connected to an outlet with a
ground connection. .................................................................................
• Check that the power cable covering is free of damage. Check that the
power plug is dust-free. If it is dirty, clean it to remove the risk of fire or
electric shock. .........................................................................................
• Never attempt to disassemble the optical unit in machines using lasers.
Leaking laser light may damage eyesight...............................................
• Handle the charger sections with care. They are charged to high
potentials and may cause electric shock if handled improperly..............
CAUTION
• Wear safe clothing. Avoid wearing loose clothing or accessories such
as ties which may be caught in rotating sections....................................
• Use utmost caution when working on a powered machine. Keep away
from chains and belts..............................................................................
• Handle the fixing section with care to avoid burns as it can be
extremely hot..........................................................................................
• Check that the fixing unit thermistor, heat and press rollers are clean.
Dirt on them can cause abnormally high temperatures. .........................
• Do not remove the ozone filter, if any, from the copier except for
routine replacement. ...............................................................................
• Do not pull on the AC power cord or connector wires on high-voltage
components when removing them; always hold the plug itself...............
• Do not route the power cable where it may be stood on or trapped. If
necessary, protect it with a cable cover or other appropriate item. ........
• Treat the ends of the wire carefully when installing a new charger wire
to avoid electric leaks. ............................................................................
• Remove toner completely from electronic components..........................
• Run wire harnesses carefully so that wires will not be trapped or
damaged.................................................................................................
• After maintenance, always check that all the parts, screws, connectors
and wires that were removed, have been refitted correctly. Special
attention should be paid to any forgotten connector, trapped wire and
missing screws. ......................................................................................
• Check that all the caution labels that should be present on the machine
according to the instruction handbook are clean and not peeling.
Replace with new ones if necessary.......................................................
• Handle greases and solvents with care by following the instructions
below: .....................................................................................................
· Use only a small amount of solvent at a time, being careful not to
spill. Wipe spills off completely.
· Ventilate the room well while using grease or solvents.
· Allow applied solvents to evaporate completely before refitting the
covers or turning the main switch on.
· Always wash hands afterwards.
• Never dispose of toner or toner bottles in fire. Toner may cause
sparks when exposed directly to fire in a furnace, etc. .........................
• Should smoke be seen coming from the copier, remove the power
plug from the wall outlet immediately. ..................................................
3. Miscellaneous
WARNING
• Never attempt to heat the drum or expose it to any organic solvents
such as alcohol, other than the specified refiner; it may generate toxic
gas. .........................................................................................................
CONTENTS
I THEORY AND CONSTRUCTION SECTION
1-1 Specifications
1-1-1 Specifications ................................................................................ 1-1-1
1-2 Handling Precautions
1-2-1 Drum ............................................................................................. 1-2-1
1-2-2 Developer and toner...................................................................... 1-2-1
1-3 Mechanical Construction
1-3-1 Part names and their functions ..................................................... 1-3-1
1-3-2 Machine cross section................................................................... 1-3-3
1-3-3 Drive system ................................................................................. 1-3-4
1-3-4 Mechanical construction ................................................................ 1-3-6
II ELECTRICAL SECTION
2-1 Electrical Parts Layout
2-1-1 Electrical parts layout .................................................................... 2-1-1
2-2 Detection of Paper Misfeed
2-2-1 Paper misfeed detection ............................................................... 2-2-1
2-2-2 Paper misfeed detection conditions .............................................. 2-2-2
2-3 Operation of the PCBs
2-3-1 Composite PCB............................................................................. 2-3-1
2-3-2 Main PCB ...................................................................................... 2-3-3
2-3-3 Operation unit PCB ........................................................................ 2-3-8
III SET UP AND ADJUSTMENT SECTION
3-1 Installation
3-1-1 Unpacking and installation ............................................................ 3-1-1
3-1-2 Setting initial copy modes ........................................................... 3-1-16
3-1-3 Installing the key counter (option) ............................................... 3-1-17
3-1-4 Installing the dehumidifier (service part) ..................................... 3-1-19
3-2 Simulation
3-2-1 Simulations.................................................................................... 3-2-1
3-3 Assembly and Disassembly
3-3-1 Precautions for assembly and disassembly .................................. 3-3-1
3-3-2 Paper feed section ........................................................................ 3-3-3
3-3-3 Main charging section ................................................................. 3-3-17
3-3-4 Exposure section......................................................................... 3-3-20
3-3-5 Drum section ............................................................................... 3-3-40
3-3-6 Developing section ...................................................................... 3-3-46
3-3-7 Transfer and separation section.................................................. 3-3-49
3-3-8 Cleaning section.......................................................................... 3-3-54
3-3-9 Fixing and eject section............................................................... 3-3-57
3-3-10 Others ......................................................................................... 3-3-67
3-4 PCB Initial Settings
3-4-1 Replacing the main PCB ............................................................... 3-4-1
3-4-2 Adjustment-free variable resistors (VR) ........................................ 3-4-4
3-5 Self Diagnostics
3-5-1 Self-diagnostic function ................................................................. 3-5-1
1AF
1-1-1
1AF
3-6 Troubleshooting
3-6-1 Image formation problems ............................................................ 3-6-1
3-6-2 Paper misfeeds ........................................................................... 3-6-16
3-6-3 PCB terminal voltages ................................................................. 3-6-19
3-6-4 Electrical problems ...................................................................... 3-6-30
3-6-5 Mechanical problems .................................................................. 3-6-38
3-7 Appendixes
Timing chart No. 1 ...................................................................................... 3-7-1
Timing chart No. 2 ...................................................................................... 3-7-2
Timing chart No. 3 ...................................................................................... 3-7-3
Composite PCB 1/3 .................................................................................... 3-7-4
Composite PCB 2/3 .................................................................................... 3-7-5
Composite PCB 3/3 .................................................................................... 3-7-6
Operation unit PCB..................................................................................... 3-7-7
Main PCB ................................................................................................... 3-7-8
General connection diagram ...................................................................... 3-7-9
General wiring diagram ............................................................................ 3-7-10
1-1-2
I
THEOR Y AND
CONSTRUCTION
SECTION
I Theory and
Construction Section
DC-2050 (MCE) S/M
CONTENTS
1-1 Specifications
1-1-1 Specifications...................................................................................... 1-1-1
1AF
1-1-5
1AF
1-1-6
1AF
1-1-1 Specifications
Type ……………………………Desktop
Copying system ………………Dry, indirect electrostatic system
Originals ………………………Sheets, books and 3-dimensional
Maximum size: A3/11" × 17"
Original feed system …………Fixed
Copy paper …………………… Plain paper: 60 – 80 g/m2 for drawer feed
60 – 200 g/m2 for bypass feed
Special paper: OHP film, colored paper and letter head
Note: Use the bypass for special paper.
Copying sizes …………………Maximum: A3/11" × 17"
Minimum: A6R/51/2" × 81/2"
Magnification ratios …………… 64 – 141%, 1% increments
Fixed ratios:
Metric
1:1 ± 0.8%, 1:1.410/1:1.270/1:1.220/1:1.150/1:1.100/
1:1.060/1:0.910/1:0.900/1:0.860/1:0.810/1:0.770/
1:0.750/1:0.700/1:0.650/1:0.640
Inch
1:1 ± 0.8%, 1:1.290/1:1.210/1:0.780/1:0.770/1:0.730/
1:0.640
Copy speeds…………………… At 100% magnification:
A4/11" × 81/2": 20 copies/min.
A3/11" × 17": 12 copies/min.
B4 (257 × 364 mm)/81/2" × 14": 13 copies/min.
First copy time ………………… 4.9 s or less (A4/11" × 81/2", 100% magnification,
manual exposure)
Warm-up time ………………… 45 s or less (room temperature 20°C/68°F, 65% RH)
Paper feed system ……………Automatic feed from the paper drawer
Capacity: 250 sheets of 80 g/m
Manual feed from the bypass table
Capacity: 50 sheets of 80 g/m
Multiple copying ……………… 1 – 100 copies
Photoconductor ……………… OPC (drum diameter 60 mm)
Charging system ……………… Single positive corona charging (drum potential: 850 V DC)
Exposure system ………………Slit exposure
Lens …………………………… Fixed-focal lens, f: 215 mm, F8.0
Light source ……………………Halogen lamp, 350 W
Developing system ……………Dry, magnetic brush
Developer: 2-component, ferrite carrier and N27T black
toner
Toner density control: toner sensor
Toner replenishing: automatic from a toner hopper
Transfer system ……………… Single positive corona charging, 5.2 kV DC
Separation system …………… Single AC corona charging, 4.1 kV AC
2
2
1-1-1
1AF
Fixing system …………………Heat roller
Heat source: halogen heater (980 W)
Control temperature: 175°C/347°F (at normal ambient
temperature)
Abnormally high temperature protection devices:
140°C/284°F and 150°C/302°F thermostats
Fixing pressure: 127.4 N
Charge erasing system ……… Exposure by cleaning lamp
Cleaning system ……………… Cleaning blade
Functions ……………………… (1) Self-diagnostics
(2) Simulation
(3) Auto clear (30 – 270 s, in intervals of 30 s)
(4) Auto start
(5) Auto shutoff (15 – 120 min, in intervals of 15 min)
(6) Auto preheat/energy saving (5 – 45 min,
in intervals of 5 min)
(7) Auto exposure
(8) Photo mode
(9) Manual magnification selection
(10) Auto magnification selection (by original size entry)
(11) Auto paper selection (by original size entry)
(12) Auto selection (when the ADF is used)
Power source …………………220 – 240 V AC, 50/60 Hz, 6.3 A
Rated power consumption …… 1450 W
Dimensions ……………………775 (W) × 590 (D) × 375 (H) mm
301/2" (W) × 231/4" (D) × 143/4" (H)
Weight …………………………Approx. 39 kg/85.8 lbs.
Floor requirements …………… 1145 (W) × 590 (D) mm
451/16" (W) × 231/4" (D)
Accessories …………………… Copy tray
Options …………………………Key counter, ADF
1-1-2
CONTENTS
1-2 Handling Precautions
1-2-1 Drum ................................................................................................... 1-2-1
1-2-2 Developer and toner ........................................................................... 1-2-1
1AF
1-1-7
1AF
1-1-8
1AF
1-2-1 Drum
Note the following when handling or storing the drum.
• When removing the image formation unit, never expose the drum surface to strong direct
light.
• Keep the drum at an ambient temperature between –20°C/ –4°F and 40°C/104°F and at
a relative humidity not higher than 85%RH. Avoid abrupt changes in temperature and
humidity.
• Avoid exposure to any substance which is harmful to or may affect the quality of the drum.
• Do not touch the drum surface with any object. Should it be touched by hands or stained
with oil, clean it.
• If the machine is left open for more than 5 minutes for maintenance, remove the drum and
store it in the drum storage bag (P/N 78369020).
1-2-2 Developer and toner
Store the developer and toner in a cool, dark place. Avoid direct light, high humidity and
temperature.
1-2-1
CONTENTS
1-3 Mechanical Construction
1-3-1 Part names and their functions ........................................................... 1-3-1
1-3-2 Machine cross section ........................................................................ 1-3-3
1-3-3 Drive system ....................................................................................... 1-3-4
1-3-4 Mechanical construction ..................................................................... 1-3-6
(1) Paper feed section ...................................................................... 1-3-6
(1-1) Paper feed from the paper drawer.................................... 1-3-8
(1-2) Paper feed from the bypass table ..................................... 1-3-9
(2) Main charging section ............................................................... 1-3-10
Surface potential correction control........................................... 1-3-13
(3) Exposure section....................................................................... 1-3-15
Exposure control for manual exposure and photo modes......... 1-3-18
Exposure control for auto exposure mode ................................ 1-3-19
Light intensity correction for enlargement and reduction
modes........................................................................................ 1-3-20
Light intensity correction by the user setting ............................. 1-3-20
(4) Developing section .................................................................... 1-3-21
Formation of the magnetic brush............................................... 1-3-23
Toner density control................................................................. 1-3-25
Correcting toner sensor output voltage ..................................... 1-3-27
Toner level detection ................................................................. 1-3-30
(5) Transfer and separation section................................................ 1-3-31
(6) Cleaning section........................................................................ 1-3-34
(7) Charge erasing section ............................................................. 1-3-35
(8) Fixing and eject section............................................................. 1-3-37
Heating the heat roller and detecting temperature.................... 1-3-39
Fixing temperature control......................................................... 1-3-40
Paper separation ....................................................................... 1-3-42
1AF
1-1-9
1AF
1-1-10
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1-3-1 Part names and their functions
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1. Operation panel
2. Original size indicator
3. Original holder
4. Main switch
5. Bypass table
6. Auxiliary table
7. Insertion guides
0
9
8
Figure 1-3-1
8. Paper drawer
9. Toner cartridge
10. Paper conveying section lever
11. Image formation unit
12. Front cover
13. Bypass cover
14. Total counter
)
15. Key counter (option)
16. Copy tray
17. Eject cover
18. Drawer bottom plate
19. Width guide tab
20. Width guide
21. Length guide
⁄
1-3-1
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A
E E
A A
EA
DC-2050 (MCE) S/M
A
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AA A
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1AF
Metric
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23
1. Auto selection key
2. Auto selection indicator
3. All clear/reset key
4. Print key
5. Copy start indicator
A3
R
A4
R
A5
A4
B4
R
B5
B5
Folio
11 15
A3
A4
A5
A4
B4
B5
Folio
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12
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141%
%
4
7
5
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64%
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12
0
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6. Stop/clear key
7. Numeric keys
C
6
A
8. Exposure adjustment keys
9. Exposure indicators
10. Auto/manual exposure key
9
11. Auto exposure indicator
12. Photo original indicator
13. Zoom-up key
/
C
14. Zoom-down key
15. Manual key
16. Manual indicator
17. Copy quantity/magnification display
18. Recall % key
19. Zoom copy indicator
20. Paper source indicators
21. Check paper size/direction indicator
22. Maintenance indicator
23. Add toner indicator
Inch
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24. ADF jam indicator
25. Paper select key
26. Paper size indicators
27. Original select key
28. Original size indicator
11 17
1
2
8 14
1
2
8 11
121
5 8
11
8
11 15
11 17
1
2
8 14
1
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2
8 11
121
2
5 8
1
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11
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Auto
Selection
Recall %
12
3
%
2
1
2
8
Add Toner
Manual
Maintenance
Zoom
( )
Check
Paper Size /
Direction
( )
Zoom
4
7
5
8
6
9
Reset
Print
Original
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Paper
Select
Auto
Photo
Original
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Dark
9
Light
8
0
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Stop/
Clear
6
5
4
Figure 1-3-2 Operation panel
1-3-2
E
A
EE E
AA A
DC-2050 (MCE) S/M
E
A
1-3-2 Machine cross section
3
1AF
7
2
8
4
6
5
Figure 1-3-3 Machine cross section
1. Paper feed section (page 1-3-6)
2. Main charging section (page 1-3-10)
3. Exposure section (page 1-3-15)
4. Developing section (page 1-3-21)
5. Transfer and separation section (page 1-3-31)
6. Cleaning section (page 1-3-34)
7. Charge erasing section (page 1-3-35)
8. Fixing and eject section (page 1-3-37)
1
Light path
Paper path
1-3-3
1AF
1-3-3 Drive system
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Figure 1-3-4 Drive system – copier main body
1. Drive motor gear
2. Gear 60/40
3. Gear 60/24
4. Gear 64/20
5. Gear 23
6. Gear 60/50
7. Blade thrust gear 31
8. Toner recycle gear 19
9. Developing drive belt
10. Pulley 16 (machine rear)
11. Gear 25 (machine front)
12. Registration gear 15/30
13. Feed belt
14. Registration collar
15. Pulley 15
16. Tension pulley 15
17. Gear 33/14 (machine rear)
18. Developing gear 32 (machine front)
19. Developing gear 23
20. Developing gear 30
21. Paper feed drive belt
22. Tension pulley 15
23. Pulley 32
24. Gear 18
25. Idle gear 38
26. Bypass gear 38
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As viewed from machine rear
27. Gear 30/18
28. Gear 25
29. Idle gear
30. Idle gear 38
31. Paper feed gear 38
32. Pulley 14
33. Gear 20
34. Retard gear 18
35. Limiter gear 15
36. Gear 80/34
37. Fixing drive belt
38. Pulley 30
39. Fixing drive gear 22
40. Heat roller gear 40
41. Eject idle gear 30
42. Eject gear 22
43. Scanner motor pulley
44. Scanner drive pulley 1
45. Scanner drive pulley 2
46. Scanner drive belt 1
47. Scanner drive belt 2
48. Scanner wire drum
49. Scanner wire
50. Scanner wire pulley
51. Scanner wire pulley
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1-3-4
1AF
67
Figure 1-3-5 Drive system – image formation unit
1. Blade thrust gear 31
2. Toner recycle gear 19
3. Magnet roller gear 17
4. Developing idle gear 19
14
235
As viewed from machine rear
5. Left spiral gear (machine rear)
6. Developing gear 28 (machine front)
7. Developing gear 31 (machine front)
1-3-5
1AF
1-3-4 Mechanical construction
(1) Paper feed section
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Figure 1-3-6 Paper feed section
1 Bypass table
2 Bypass lift
3 Bypass upper pulley
4 Bypass lower pulley
5 Bypass lower guide
6 Drawer bottom plate
7 Drawer spring
8 Paper feed pulleys A and B
9 Upper registration roller
0 Lower registration roller
! Registration stopper
1
)(
@ Upper pre-transfer roller
# Lower pre-transfer roller
$ Registration guide
% Upper pre-transfer guide
^ Bypass solenoid (BYPSOL)
& Paper feed solenoid (PFSOL)
* Registration solenoid (RSOL)
( Bypass paper length switch (BYPPLSW)
) Bypass paper width switch (BYPPWSW)
⁄ Registration switch (RSW)
1-3-6
DC-2050 (MCE) S/M
1AF
The paper feed section consists of the primary feed and secondary feed subsections.
Primary feed conveys paper from the paper drawer or the bypass table to the upper and
lower registration rollers, at which point secondary paper feed takes place and the paper
travels to the transfer section in sync with the exposure timing.
CN12-2
CN17-2
CN2-2
CN2-4
CN14-2
MPCB
RSOL
RSW
PFSOL
Figure 1-3-7 Paper feed section block diagram
BYPPLSW
BYPSOL
1-3-7
DC-2050 (MCE) S/M
1AF
(1-1) Paper feed from the paper drawer
The paper drawer consists of the drawer bottom plate, drawer springs and other components
and can hold up to 250 sheets of copy paper.
Paper is fed out of the drawer by the rotation of paper feed pulleys A and B.
Prescan start
Print key
HPSW
RSW
SM
PFSOL
RSOL
250 ms
A
BC D
147 P+140 ms *
1
100 ms
Auto exposure mode, A4/11" × 81/2" copy paper, magnification ratio 100%
*1 Varies depending on the setting by simulation 27.
Timing chart 1-3-1 Paper feed from the paper drawer
A When the print key is pressed, the paper feed solenoid (PFSOL) turns on for 250 ms,
rotating paper feed pulleys A and B to perform primary feed. Then the paper is fed by
the upper and lower registration rollers and its leading edge stops at the registration
stopper to create slack in the paper before registration.
B The leading edge of the paper turns the registration switch (RSW) on.
C The scanner starts scanning and the home position switch (HPSW) turns off. After 147
pulses + 140 ms, the registration solenoid (RSOL) turns on and the registration stopper
lowers. The lower registration and pre-transfer rollers convey the paper to start
secondary feed.
D 100 ms after the trailing edge has turned the registration switch (RSW) off, the registration
solenoid (RSOL) turns off to complete secondary paper feed.
1-3-8
DC-2050 (MCE) S/M
1AF
(1-2) Paper feed from the bypass table
The bypass table can hold up to 50 sheets of paper at one time.
When the print key is pressed, the bypass solenoid (BYPSOL) turns on, rotating the bypass
upper pulley, while the bypass lift is raised until the paper comes into contact with the bypass
upper pulley. The paper on the bypass table is then conveyed to the secondary paper feed
section.
The bypass lower pulley rotates opposite to the paper feed direction so that the torque limiter
prevents multiple sheets from being fed at one time.
Prescan start
Print key
HPSW
RSW
SM
BYPSOL
RSOL
250 ms
A
BC D
147 P+140 ms *
1
100 ms
Auto exposure mode, A4/11" × 81/2" copy paper, magnification ratio 100%
*1 Varies depending on the setting by simulation 27.
Timing chart 1-3-2 Paper feed from the bypass table
A When the print key is pressed, the bypass solenoid (BYPSOL) turns on for 250 ms, which
raises the bypass lift and rotates the bypass lower pulley to perform primary paper feed.
The paper is then fed by the upper and lower registration rollers until the leading edge
stops at the registration stopper to create slack in the paper before registration.
B The leading edge of the paper turns the registration switch (RSW) on.
C The scanner starts scanning and the home position switch (HPSW) turns off. After 147
pulses + 140 ms, the registration solenoid (RSOL) turns on and the registration stopper
lowers. The lower registration and pre-transfer rollers convey the paper to start
secondary feed.
D 100 ms after the trailing edge of the paper turns the registration switch (RSW) off, the
registration solenoid (RSOL) turns off to complete secondary paper feed.
1-3-9
DC-2050 (MCE) S/M
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