Konica Minolta DB-410, DB-409, DB-210, DB-209 User Manual
SERVICE MANUAL
Models
DB-209/210/409/410
MARCH 2001
CSM-DB209/210
KONICA BUSINESS TECHNOLOGIES, INC.
DB-209/210/409/410
SERVICE MANUAL
MARCH 2001
Used on Konica Models
7020, 7025, 7030, and 7035
IMPORTANT NOTICE
Because of the possible hazards to an inexperienced
person servicing this equipment, as well as the risk of
damage to the equipment, Konica Business Technologies strongly recommends that all servicing be performed by Konica-trained service technicians only.
Changes may have been made to this equipment to
improve its performance after this service manual was
printed. Accordingly, Konica Business Technologies,
Inc., makes no representations or warranties, either
expressed or implied, that the information contained in
this service manual is complete or accurate. It is understood that the user of this manual must assume all risks
or personal injury and/or damage to the equipment while
servicing the equipment for which this service manual
is intended.
Corporate Publications Department
© 2001, KONICA BUSINESS TECHNOLOGIES, INC.
All rights reserved.
Printed in U.S.A.
CONTENTS
DB-209/210/409/410
DB-209/210
1. OUTLINE
DB-209/210 PRODUCT SPECIFICATIONS ................... 1
[1] Type ................................................................ 1
[2] Functions ......................................................... 1
[3] Machine data................................................... 1
[4] Maintenance.................................................... 1
[5] Machine environment ...................................... 1
CENTER CROSS SECTION ........................................... 2
DRIVE SYSTEM DIAGRAM ............................................ 3
2. UNIT EXPLANATION
PAPER FEED SECTION................................................. 4
[1] Composition .................................................... 4
[2] Mechanisms .................................................... 4
[3] Paper feed and no paper detection
control .............................................................. 5
[4] Tray up and down control................................ 7
[5] Paper size detection control ............................ 8
[6] Control of paper-level detection ...................... 9
[7] Jam detection control ...................................... 9
3. DISASSEMBLY/ASSEMBLY
DISASSEMBLY/ASSEMBLY......................................... 10
[1] Removing and reinstalling paper
feed tray ........................................................ 10
[2] Removing and reinstalling the paper
feed unit ......................................................... 10
[3] Replacing the feed roller rubber and
double feed prevention rubber/upper ............. 11
[4] Repacing the double feed prevention
rubber/lower .................................................. 12
3. DISASSEMBLY/ASSEMBLY
DISASSEMBLY/ASSEMBLY ..........................................21
[1] Removing and reinstalling the paper
feed tray ......................................................... 21
[2] Removing and reinstalling the paper
feed unit.......................................................... 21
[3] Replacing the feed roller rubber and
double feed prevention rubber/upper .............22
[4] Replacing the double feed prevention
rubber/lower ................................................... 23
[5] Replacing the wires ........................................ 24
4. DB-209/210/409/410 DIAGRAMS
DB-209/210 ELECTRICAL PARTS LAYOUT ................ 27
DB-409/410 ELECTRICAL PARTS LAYOUT ................ 28
DB-209/210 CONNECTOR LAYOUT ............................ 29
DB-409/410 CONNECTOR LAYOUT ............................ 30
DB-209/DB-409 TIMING CHART (8.5X11, LIFE SIZE, 3
COPIES, FEED FROM TRAY3 .................................... 31
DB-209/210/409/410 OVERALL WIRING DIAGRAM ....33
DB-409/410
1. OUTLINE
DB-409/410 PRODUCT SPECIFICATIONS ................. 13
[1] Type .............................................................. 13
[2] Functions ....................................................... 13
[3] Machine data................................................. 13
[4] Maintenance.................................................. 13
[5] Machine environment .................................... 13
CENTER CROSS SECTION ......................................... 14
DRIVE SYSTEM DIAGRAM .......................................... 15
2. UNIT EXPLANATION
PAPER FEED SECTION............................................... 16
[1] Composition .................................................. 16
[2] Mechanisms .................................................. 16
[3] Paper feed and no paper detection
control............................................................ 17
[4] Tray up and down control.............................. 18
[5] Paper size detection control .......................... 19
[6] Control of paper-level detection .................... 20
iii
DB-209/210/409/410
Blank
iv
SAFETY PRECAUTIONS
SAFETY PRECAUTIONS
Installation Environment
Safety considerations usually are directed toward
machine design and the possibility of human error. In
addition, the environment in which a machine is operated must not be overlooked as a potential safety
hazard.
Most electrical equipment is safe when installed in a
normal environment. However, if the environment is
different from what most people consider to be normal, it is conceivable that the combination of the
machine and the room air could present a hazardous
combination. This is because heat (such as from
fusing units) and electrical arcs (which can occur
inside switches) have the ability to ignite flammable
substances, including air.
When installing a machine, check to see if there
is anything nearby which suggests that a potential hazard might exist. For example, a laboratory
might use organic compounds which, when they
evaporate, make the room air volatile. Potentially dangerous conditions might be seen or smelled. The
presence of substances such as cleaners, paint thinners, gasoline, alcohol, solvents, explosives, or similar items should be cause for concern.
If conditions such as these exist, take appropriate
action, such as one of the following suggestions.
effect may be caused by altering any aspect of the
machine’s design. Such changes have the potential
of degrading product performance and reducing
safety margins.
For these reasons, installation of any modification not
specifically authorized by Konica Business Machines
U.S.A., Inc., is strictly prohibited.
The following list of prohibited actions is not all-inclusive, but demonstrates the intent of this policy.
• Using an extension cord or any unauthorized
power cord adapter.
• Installing any fuse whose rating and physical size
differs from that originally installed.
• Using wire, paper clips, solder, etc., to replace or
eliminate any fuse (including temperature fuses).
• Removing (except for replacement) any air filter.
• Defeating the operation of relays by any means
(such as wedging paper between contacts).
• Causing the machine to operate in a fashion other
than as it was designed.
• Making any change which might have a chance
of defeating built-in safety features.
• Using any unspecified replacement parts.
• Determine that the environment is controlled
(such as through the use of an exhaust hood) so
that an offending substance or its fumes cannot
reach the machine.
• Remove the offending substance.
• Install the machine in a different location.
The specific remedy will vary from site to site, but the
principles remain the same. To avoid the risk of injury
or damage, be alert for changes in the environment
when performing subsequent service on any machine, and take appropriate action.
Unauthorized Modifications
Konica copiers have gained a reputation for being
reliable products. This has been attained by a combination of outstanding design and a knowledgeable
service force.
The design of the copier is extremely important. It is
the design process that determines tolerances and
safety margins for mechanical, electrical, and electronic aspects. It is not reasonable to expect individuals not involved in product engineering to know what
General Safety Guidelines
This copier has been examined in accordance with
the laws pertaining to various product safety regulations prior to leaving the manufacturing facility to
protect the operators and service personnel from
injury. However, as with any operating device, components will break down through the wear-and-tear of
everyday use, as will additional safety discrepancies
be discovered. For this reason, it is important that the
technician periodically performs safety checks on the
copier to maintain optimum reliability and safety.
The following checks, not all-inclusive, should be
made during each service call:
CAUTION: Avoid injury. Ensure that the copier is
disconnected from its power source before continuing.
• Look for sharp edges, burrs, and damage on all
external covers and copier frame.
• Inspect all cover hinges for wear (loose or broken).
• Inspect cables for wear, frays, or pinched areas.
v
SAFETY PRECAUTIONS
• Ensure that the power cord insulation is not damaged (no exposed electrical conductors).
• Ensure that the power cord is properly mounted
to the frame by cord clamps.
• Check the continuity from the round lug (GND) of
the power cord to the frame of the copier -- ensure
continuity. An improperly grounded machine can
cause an electrically-charged machine frame.
Safeguards During Service Calls
Confirm that all screws, parts, and wiring which are
removed during maintenance are installed in their
original positions.
• When disconnecting connectors, do not pull the
wiring, particularly on AC line wiring and high
voltage parts.
• Do not route the power cord where it is likely to
be stepped on or crushed.
• Carefully remove all toner and dirt adhering to any
electrical units or electrodes.
• After part replacement or repair work, route the
wiring in such a way that it does not contact any
burrs or sharp edges.
• Do not make any adjustments outside of the
specified range.
Applying Isopropyl Alcohol
Care should be exercised when using isopropyl alcohol, due to its flammability. When using alcohol to
clean parts, observe the following precautions:
• Remove power from the equipment.
• Use alcohol in small quantities to avoid spillage
or puddling. Any spillage should be cleaned up
with rags and disposed of properly.
• Be sure that there is adequate ventilation.
• Allow a surface which has been in contact with
alcohol to dry for a few minutes to ensure that the
alcohol has evaporated completely before applying power or installing covers.
Summary
It is the responsibility of every technician to use professional skills when servicing Konica products. There
are no short cuts to high-quality service. Each copier
must be thoroughly inspected with respect to safety
considerations as part of every routine service call.
The operability of the copier, and more importantly,
the safety of those who operate or service the copier,
are directly dependent upon the conscientious effort
of each and every technician.
Remember...when performing service calls, use good
judgement (have a watchful eye) to identify safety
hazards or potential safety hazards that may be present, and correct these problem areas as they are
identified -- the safety of those who operate the copier
as well as those who service the copier depend on it!
vi
DB-209/210 PRODUCT SPECIFICATIONS
[1] Type
Type: Tray paper feed
(Front loading)
[2] Functions
Paper size:
U.S.A. Europe and others
11 × 17, 8.5 × 14,
8.5 × 11R, 8.5 × 11,
5.5 × 8.5, F4, A3,
A4R, A4, A5R
Paper type: 16 lb. to 24 lb. high quality
Maximum
Paper capacity: 500 sheets x 2 trays
A3, B4, A4, A4R, B5,
A5R, 11 × 17,
8.5 × 11, 8.5 × 11R,
F4
paper
(22 lb.)
DB-209/210/409/410
[3] Machine data
Power: DC24V/5V (supplied from
main body)
Power consumption: Max.40VA (When the PTC
heater is not in use.)
Weight: Approximately 56 lb.
Machine
Dimensions: Length 22.8 in.
Depth 23.4 in.
Height 12.2 in.
[4] Maintenance
Maintenance: Same as main body
[5] Machine operation environment
Temperature: 50 to 86°F
Humidity: 20 to 80%RH
Note : Specifications are subject to change without
notice.
1
DB-209/210/409/410
CENTER CROSS SECTION
Paper lift-up plates
Feed rollers
Paper lowering levers
Double feed prevention
rollers/upper
Double feed prevention
roller/lower
Conveyance
rollers
2
DRIVE SYSTEM DIAGRAM
Conveyance roller
DB-209/210/409/410
Double feed prevention roller/upper
1st paper feed SD (upper) (SD101)
Conveyance roller
Paper feed motor (M100)
Double feed prevention roller/lower
1st paper feed SD (lower) (SD102)
3
DB-209/210/409/410
PAPER FEED UNIT
[1] Composition
Double feed prevention roller/upper
Double feed prevention roller/lower
Feed roller
Size setting units
[2] Mechanisms
Mechanism Method
Paper feed Paper feed roller
Paper lifting Paper lift-up plate
Double feed Torque limiter
prevention
Tray loading Front loading
1st paper feed Paper feed SD
Feed roller
Jam processing Release of pressure on
double feed prevention roller
No paper detect Photosensor
Paper size detect Size setting unit
Paper conveyance Roller conveyance
Conveyance drive Gears
Paper feed door
4
DB-209/210/409/410
[3] Paper feed and no paper detection
control
24VDC
24VDC
PGND
PGND
5VDC
SGND
M100 CONT
SD101 CONT
SD102 CONT
PS103
PS108
DB SELECT1
DB SELECT2
MAIN BODY
Paper feed is carried out by transmitting the drive of the
M100 (Paper feed motor) to the upper and lower paper
feed rollers and to the feed rollers. When feed starts,
SD101 (1st. paper feed SD (upper)) or SD102 (1st. paper
feed SD (lower)) raises and lowers the feed roller and
contacts the paper.
M100 CONT
M100 LD
M100 CLK
M100 CONT
SD101 DRIVE
SD102 DRIVE
PS103 SIG
PS108 SIG
PFUDB
24VDC
PGND
24VDC
24VDC
P.GND
5VDC
S.GND
24VDC
24VDC
SGND
5VDC
SGND
5VDC
M100
EM
DB-209
M100
DB-210
SD101
SD102
PS103
PS108
1. Operation
a. Paper feed operation timing (upper tray)
(1) 1st. sheet start
A specified time after start-button is turned ON
(2) 2nd. sheet start
A specified time after 1st. sheet SD101 is turned ON
(3) OFF timing
A specified time after SD101 is turned ON
b. Paper feed operation timing (lower tray)
(1) 1st. sheet start
A specified time after start-button is turned ON
(2) 2nd. sheet start
A specified time after 1st. sheet SD102 is turned ON
(3) OFF timing
A specified time after SD102 is turned ON
c. No paper detection
If paper in the tray is used up, PS103 or PS 108 goes
OFF and the no paper detection signal of each tray is
sent to the main body via the PFUDB.
Drive of the M100, SD101 and SD102 is carried out by
PFUDB (PFU drive board)and controlled by the main
body.
No paper detection is carried out with PS103 (No paper
detect PS (upper)) and PS108 (No paper detect PS
(lower)) and controlled by the main body via the PFUDB.
5
DB-209/210/409/410
2. Signals
a. Input signals
(1) PS103 SIG (PS103 -> PFUDB)
Upper tray paper/no paper detection signal
[H] :no paper
[L] :with paper
(2) PS108 SIG (PS108 -> PFUDB)
Lower tray paper/no paper detection signal
[H] :no paper
[L] :with paper
(3) SD101 CONT (MAIN BODY -> PFUDB)
SD101 ON/OFF control signal from main body
[H] :OFF
[L] :ON
(4) SD102 CONT (MAIN BODY -> PFUDB)
SD102 ON/OFF control signal from main body
[H] :OFF
[L] :ON
b. Output signals
(1) M100 CONT (PFUDB -> M100)
M100 drive control signal
[H] : M100 OFF
[L] :M100 ON
(2) M100 CLK (PFUDB -> M100)
M100 revolution control board clock signal
(3) SD101 (PFUDB -> SD101)
SD101 drive control signal
[H] :OFF
[L] :ON
(4) SD102 DRIVE (PFUDB -> SD102)
SD102 drive control signal
[H] :OFF
[L] :ON
(5) PS103 (PFUDB -> MAIN BODY)
Upper tray paper/no paper detection signal sent to
main body
(6) PS108 (PFUDB -> MAIN BODY)
Lower tray paper/no paper detection signal sent to
main body
(7) DB SELECT (PFUDB -> MAIN BODY)
DB Type identification signals sent to main body
Signal
DB DB-SELECT 1 DB-SELECT 0
DB-209/210 H L
Not connected H
Undefined L L
H
6
DB-209/210/409/410
[4] Tray up and down control
24VDC
24VDC
PGND
PGND
5VDC
SGND
M101 CONT
M102 CONT
PS101
PS102
PS106
PS107
MAIN BODY PFUDB
M101 DRIVE
24VDC
SGND
PS101
5VDC
SGND
PS102
5VDC
M102 DRIVE
24VDC
SGND
PS106
5VDC
SGND
PS107
5VDC
M101
PS101
PS102
M102
PS106
PS107
2. Signals
a. Input signals
(1) PS101 (PS101 -> PFUDB)
Upper tray detect signal
By turning ON with [L] showing, M101 raises the
paper in the upper tray.
(2) PS106 (PS106 -> PFUDB)
Lower tray detect signal
By turning on with [L] showing, M102 raises the paper
in the lower tray.
(3) PS102 (PS102 -> PFUDB)
Upper tray paper upper limit detect signal
When the upper tray is raised and arrives at the upper
limit position, the signal becomes [H] and M101 is
turned off.
(4) PS107 (PS107 -> PFUDB)
Lower tray paper upper limit detect sensor
When the lower tray is raised and arrives at the upper
limit position, the signal becomes [H] and M102 is
turned off.
1. Operation
When the paper feed tray of each level is set, PS101
(Tray detect PS (upper)) and PS106 (Tray detect PS
(lower)) detect the tray, M101 (Tray motor 1) and
M102 (Tray motor 2) turn on and lift the base plate in
the tray. When the tray is lifted, PS102 (Upper limit
detect PS (upper)) and PS 107 (Upper limit detect PS
(lower)) detect the paper upper limit and turn ON,
M101 and M102 turn off and the raising of the tray is
completed.
The down operation of the trays is performed
mechanically.
(5) M101 CONT (MAIN BODY -> PFUDB)
M101 ON/OFF control signal from main body
(6) M102 CONT (MAIN BODY -> PFUDB)
M102 ON/OFF control signal from main body
b. Output signals
(1) M101 DRIVE (PFUDB -> M101)
M101 drive control signal
[L] :M101 ON
[H] :M101 OFF
(2) M102 DRIVE (PFUDB -> M102)
M102 drive control signal
[L] :M102 ON
[H] :M102 OFF
(3) PS101 (PFUDB -> MAIN BODY)
Upper tray detect signal sent to main body
(4) PS102 (PFUDB -> MAIN BODY)
Upper tray paper upper limit detect signal sent to
main body
(5) PS106 (PFUDB -> MAIN BODY)
Lower tray detect signal sent to main body
(6) PS107 (PFUDB -> MAIN BODY)
Lower tray paper upper limit detect signal sent to
main body
7
DB-209/210/409/410
[5] Paper size detection control
24VDC
24VDC
PGND
PGND
5VDC
SGND
SIZE D
SIZE C
SIZE B
SIZE A
MAIN BODY
Tray paper size is detected in the main body by a signal
sent from SDB1(size detection board1) and SDB2 (size
detection board2) via the PFUDB (PFU drive board).
1. Operation
a. Tray paper size detection
Paper size for either tray is set by SW1 and SW2
above SDB1 and SDB2 and the PFUDB detects the
switch signal corresponding to the position of SW1
and SW2.
The relation between switch signal and paper size is
as follows.
U SIZE D
U SIZE C
U SIZE B
U SIZE A
U SIZE SELECT
L SIZE D
L SIZE C
L SIZE B
L SIZE A
L SIZE SELECT
PFUDB
SW1
SDB1
SW2
SDB2
For U.S.A.
Paper size
(Label display
order)
11 x 17
A5R
A4
A4R
A3
F4
5.5 x 8.5
8.5 x 11
8.5 x 11R
8.5 x 14
For Europe
Paper size
(Label display
order)
11 x 17
B5
B4
A5R
A4
A4R
A3
F4
11
11R
Switch signal
SIZE A SIZE B SIZE C SIZE D
Switch signal
SIZE A SIZE B SIZE C SIZE D
2. Signals
a. Input signals
(1) U SIZE A - D (SDB1 -> PFUDB)
Upper tray paper size detect signal
(2) U SIZE A - D (SDB2 -> PFUDB)
Lower tray paper size detect signal
b. Output signal
(1) SIZE A - D (PFUDB -> MAIN BODY)
Paper size detection signal sent to main body
8
DB-209/210/409/410
[6] Control of paper-level detection
SGND
5VDC
NAIN BODY
After the trays have been set in the machine, paper level is
detected by PS101 (tray detect sensor PS (upper)) and
PS106 (tray detect sensor PS (lower)).
As the paper level in tray runs low, the actuator at the rear
part of the tray gradually rotates as illustrated below. The
level is detected by the number of times the sensor goes
ON/OFF (the number of slits detected).
View looking from rear
Actuator
1. Operation
SGND
PS101
5VDC
SGND
PS106
5VDC
PFUDB
Direction of rotation
when the paper
lifting plate rises.
Tray detect
sensor
Slit 1
Slit 2
PS101
PS106
[7] Jam detection control
PFUDB
SGND
PS104
5VDC
SGND
PS105
5VDC
5VDC
SGND
PS104
PS105
MAIN BODY
1. Operation
Jam detection control is performed by the main body
when it has judged the changes in the PS104 (jam
detect PS1) and PS105 (jam detecting PS2)
detection signals. If the ON detection signal of each
sensor does not change after a specified time, it is
judged that there is a paper jam.
2. Signals
a. Input signals
(1) PS104 (PS104 -> PFUDB)
Turns on when [H] is showing, and notifies the main
body of the presence or absence of paper in the
upper part of the DB.
(2) PS105 (PS105 -> PFUDB)
Goes ON when the level is [H], and notifies the main
body of the existence or otherwise of paper in the
lower part of the DB and also of whether the paper
feed door is open or closed.
PS104
PS105
a. Detection of paper level in tray
The following shows the relation between the paper
level and the number of slit detections by the sensor
(PS101 or PS106).
0 slits : Full
1 slit : Medium
2 slits : Low
b. Output signals
(1) PS104 (PFUDB -> MAIN BODY)
PS104 detect signal sent to main body
(2) PS 105 (PFUDB -> MAIN BODY)
PS105 detect signal sent to main body
9
DB-209/210/409/410
DISASSEMBLY/ASSEMBLY
Caution: Make sure the power plug is taken
out of the socket.
[1] Removing and reinstalling paper
feed tray
(1) Pull out the paper feed tray and take out the 2 set
screws on the right hand side.
(2) Remove the paper tray from the guide rails.
Set screws
Paper feed trays
Guide rails
[2] Removing and reinstalling the
paper feed unit
(1) Remove the tray cover and the paper tray.
Tray cover
(2) Opening the paper feed door, take out the 3 set
screws and remove the size setting unit.
(3) Install by reversing the removal procedure.
Paper feed door
Size setting unit
Set screws
(3) Remove the 3 set screws and remove the cover.
Cover
Set screws
(4) Remove the paper feed unit connector.
10
(5) Remove the 2 screws indicated by the engraved
arrows and remove by drawing the paper feed unit
forward.
Paper feed units
Set screws
(6) Install by reversing the removal procedure.
Caution: Immediately after installing the paper feed
unit, as the swing gear and the paper feed
solenoid are not in the correct position, it
sometimes happens that paper is not fed.
For this reason, always make a copy to
confirm that operation is normal.
DB-209/210/409/410
[3]
Replacing of the feed roller rubber and
double feed prevention rubber/upper
(1) Remove the paper feed unit.
(2) Remove the fixing rings and bearings.
(3) While withdrawing the paper feed shaft, remove the
double feed prevention roller/upper from the paper
feed roller unit.
Double feed prevention roller/upper
Paper feed roller unit
Stopper rings
(4) Removing the fixing ring and remove the feed roller
by withdrawing the guide shaft in the direction
shown by the arrow.
(5) Remove the feed rubber from the feed roller.
(6) Remove the feed shaft and then remove the double
feed prevention roller/upper.
(7) Remove the double feed prevention rubber/upper
from the double feed prevention roller/upper.
Feed shaft
Feed rubber
Paint mark
Stopper ring
Feed roller
Guide shaft
Feed shaft
Double feed
prevention
roller/upper
Double feed
prevention
rubber/upper
(8) Install by reversing the removal procedure.
Caution:
Pay attention to the direction in which you install
each roller rubber. Install so that the swing-gear
shaft enters the paper feed roller unit.
11
DB-209/210/409/410
[4] Replacing the double feed
prevention rubber/lower
(1) Remove the paper feed unit.
(2) Remove the set screw.
(3) Pushing the knobs on either side of the double feed
prevention unit, then remove by drawing it forward.
Double feed
Knobs
Set screw
prevention unit
(4) While pushing the projection of the lever click shaft,
withdraw it and remove the double feed prevention
roller.
Double feed prevention
Paint mark
rubber/lower
Double feed prevention
roller
Lever click shaft
(5) Remove the double feed prevention rubber/lower
from the double feed prevention roller.
(6) Install by reversing the removal procedure.
Caution : Pay attention to the direction in which
you install each roller rubber.
When installing the double-feed
prevention unit into the main body, be
sure to align it with the center of the
mark engraved on the main-body
plate.
12
DB-409/410 PRODUCT SPECIFICATIONS
[1] Type
Type: Tray Paper Feed
(Front Loading)
[2] Functions
Paper size: A4, A4R, B5, B5R, 8.5 x 11,
8.5 x 11R
Paper type: 16 lb. - 24 lb. high quality
paper
Maximum
paper capacity: 1,500 Sheets
(22 lb.)
[3] Machine data
Power: DC24V/5V (supplied from
main body)
Power consumption: Max.40VA (When the PTC
heater is not in use.)
Weight: Approximately 52 lb.
Machine dimensions: Length 22.8 in.
Depth 23.4 in.
Height 12.2 in.
DB-209/210/409/410
[4] Maintenance
Maintenance: Same as main body
[5] Machine environment
Temperature: 50 to 86°F
Humidity: 20 to 80%RH
Note : Specifications are subject to change without
notice.
13
DB-209/210/409/410
CENTER CROSS SECTION
Tray
Double feed prevention roller/upper
Feed roller
Double feed prevention
roller/lower
Conveyance
roller
Paper feed path
for the reverse
side copy
:
14
DRIVE SYSTEM DIAGRAM
DB-209/210/409/410
Conveyance roller
Double feed prevention roller/upper
1st Paper feed SD (SD101)
Paper feed motor (M100)
15
DB-209/210/409/410
PAPER FEED SECTION
[1] Composition
Rear edge stopper
Paper lift-up plate
Side guide
Double feed prevention
roller/lower
Feed roller
Double feed
prevention
roller/upper
[2] Mechanisms
Mechanism Method
Paper feed Paper feed roller
Paper lift-up * Paper lift-up plate
Double feed Torque limiter
prevention
Tray loading Front loading
1st paper feed Paper feed SD
Feed roller
Jam processing Release of pressure on
double feed prevention roller
No paper detect Photosensor
Paper size detect Size setting unit
Paper conveyance Roller conveyance
Conveyance drive Gears
Size setting unit
Paper feed door
* Paper lift-up
The paper tray (LCT) is suspended on 4 up/down
drive wires (wires A, B, C, and D). When paper is
supplied to the paper tray, the tray falls under the
weight of the paper itself, but through the tension
of the drive assist spring, balance with the weight
of the paper is maintained.
When the paper tray (LCT) is loaded, the motor
rotates, causing the wire to be wound around the
drive pulley. As a result, the tray rises.
When the paper tray is withdrawn from the suspension base, the coupling with the drive is disconnected, and the tray falls to the position in
which the balance between the weight of the paper
and the drive-assist spring is maintained.
Wire A
Wire B
Wire D
Wire C
Detection
wire
Tray motor
(M101)
16
Drive assist
spring
Drive pulleys
Assist wire
DB-209/210/409/410
DB
DB-409/410
Not connected
Undefined
Signal
DB-SELECT 1
L
H
L
DB-SELECT 0
H
H
L
[3] Paper feed and no paper detection
control
M100 CONT
SD101 CONT
DB SELECT1
DB SELECT0
MAIN BODY
24VDC
24VDC
PGND
PGND
5VDC
SGND
PS103
PS109
M100 CONT
M100 LD
M100 CLK
M100 CONT
SD101 DRIVE
PS103 SIG
PS109 SIG
LCTDB
24VDC
PGND
24VDC
24VDC
P.GND
5VDC
S.GND
24VDC
SGND
5VDC
SGND
5VDC
M100
EM
DB-409
M100
DB-410
SD101
PS103
PS109
2. Signals
a. Input signals
(1) PS103 (PS103 -> LCTDB)
Tray paper/no paper detection signal
[H]: no paper
[L] :with paper
(2) PS109 (PS109 -> LCTDB)
Paper level in tray detection signal
Turns on with [L], sends main body that little paper is left.
(3) SD101 CONT (MAIN BODY -> LCTDB)
SD101 ON/OFF control signal from main body
[H]: OFF
[L] :ON
b. Output signals
(1) M100 CONT (LCTDB -> M100)
M100 drive control signal
Paper feed is carried out by transmitting the drive of the M100
(DB paper feed motor) to the paper feed roller and to the
feed roller. When feed starts, SD101 (1st. paper feed SD)
raises and lowers the feed roller and contacts the paper.
Drive of the M100, SD101 is carried out by LCTDB (LCT
drive board) and controlled by the main body.
No paper detection is carried out with PS103 (No paper
detect PS) and controlled by the main body via the LCTDB.
A related signal is the PS109 (Paper level detect PS2)
which sent the remaining paper level to the main body.
1. Operation
a. Paper feed operation timing
(1) 1st. sheet start
A specified time after start button is turned ON
(2) 2nd. sheet start
A specified time after 1st. sheet SD101 is turned ON
(3) OFF timing
A specified time after SD101 is turned ON
[H]: M100 OFF
[L]: M100 ON
(2) M100 CLK (LCTDB -> M100)
M100 rotation control board clock signal
(3) SD101 (LCTDB -> SD101)
SD101 drive control signal
[H]: OFF
[L] :ON
(4) PS103 (LCTDB -> MAIN BODY)
Paper/no paper detection signal sent to main body
(5) DB SELECT (LCTDB -> MAIN BODY)
DB type identification signals that is sent to the main
body
b. No paper detection
If paper in the tray is used up, PS103 goes OFF and
no paper detection signal is sent to the main body via
the LCTDB.
17
DB-209/210/409/410
[4] Tray up and down control
24VDC
24VDC
PGND
PGND
5VDC
SGND
M101 CONT
PS101
PS102
MAIN BODY LCTDB
1. Operation
When the paper feed tray of each level is set, PS101
(Tray detect PS) detects the tray, M101 (Tray motor)
turns ON and lifts the base plate in the tray. When the
tray is lifted, PS102 (Paper level detect PS1) detects
the paper upper limit and turns on, then M101 turns
off and the raising of the tray is completed.
The down operation of the trays is performed mechanically.
M101 DRIVE
24VDC
SGND
PS101
5VDC
SGND
PS102
5VDC
M101
PS101
PS102
2. Signals
a. Input signals
(1) PS101 (PS101 -> LCTDB)
Tray detect signal
By turning with [L] showing, M101 raises the paper in
the upper tray.
(2) PS102 (PS102 -> LCTDB)
Upper tray upper limit detection signal
When the upper tray paper is lifted and arrives at the
upper limit position, the signal becomes [H] and
M101 is turned off.
(3) M101 CONT (MAIN BODY -> LCTDB)
M101 ON/OFF control signal from main body
b. Output signals
(1) M101 DRIVE (LCTDB -> M101)
M101 drive control signal
[L]: M101 ON
[H]: M101 OFF
(2) PS101 (LCTDB -> MAIN BODY)
Tray detection signal sent to main body
(3) PS102 (LCTDB -> MAIN BODY)
Paper upper limit detect signal sent to main body
18
DB-209/210/409/410
[5] Paper size detection control
SIZE SELECT
LCTDB
SIZE D
SIZE C
SIZE B
SIZE A
SW1
SDB
24VDC
24VDC
PGND
PGND
5VDC
SGND
SIZE D
SIZE C
SIZE B
SIZE A
MAIN BODY
Tray paper size is detected in the main body by a signal
sent from SDB (size detection board) via the LCTDB (LCT
drive board).
1. Operation
a. Tray paper size detection
Paper size for either tray is set by SW1 above SDB
and the LCTDB detects the switch signal corresponding to the position of SW1.
2. Signals
a. Input signal
(1) SIZE A - D (SDB -> LCTDB)
Tray paper size detect signal
b. Output signal
(1) SIZE A - D (LCTDB -> MAIN BODY)
Paper size detection signal sent to main body
The relation between switch signal and paper size is
as follows.
Paper size
Switch signal
(Label display
order)
SIZE A SIZE B SIZE C SIZE D
8.5 x 11R
A4
A4R
8.5 x 11
8.5 x 11R
B5R
B5
A4
A4R
8.5 x 11
19
DB-209/210/409/410
[6] Control of paper-level detection
NAIN BODY
SGND
5VDC
LCTDB
SGND
PS101
5VDC
SGND
PS109
5VDC
PS101
PS109
After the trays have been set in the machine, paper level is
detected by PS101 (tray detect PS) and PS109 (paper
level detect PS2).
As the paper level in tray runs low, the actuator at the rear
part of the tray gradually rotates as illustrated below. The
remaining paper level is detected based on the ON/OFF
states of PS101 and PS109.
Direction of rotation when the
paper lifting plate is rising.
Viewing from the rear
Actuator
Paper level detect
sensor 2 (PS109)
Tray detect
sensor (PS101)
1. Operation
a. Detection of paper level in tray
The following shows the relation between the paper
level and the number of slit detections by the sensor
(PS101 or PS109).
Paper level PS101 PS109
Full
Medium
Low
20
DISASSEMBLY/ASSEMBLY
DB-209/210/409/410
Caution: Make sure the power plug is taken
out of the socket.
[1] Removing and reinstalling the
paper feed tray
(1) Pull out the paper tray and take out the 4 set
screws and remove the tray front cover.
Set screws
Tray front cover
(2) Remove the 5 set screws from the guide rails and
remove paper tray from guide rails.
Set screws
[2] Removing and reinstalling the
paper feed unit
(1) Remove the tray cover and the paper tray.
(2) Open the paper feed door, remove the three set
screws, then remove the size setting unit.
Tray cover
Size setting
unit
(3) Remove the 3 set screws and remove the cover.
Set screws
Paper feed door
Paper tray
Set screws
Guide rail
Set screws
(3) Install by reversing the removal procedure.
Set screws
(4) Remove the paper feed unit connector.
Cover
21
DB-209/210/409/410
(5) Remove the set screw indicated by the arrow
marking, and remove the paper-feed unit by pulling
it forward.
Set screw
Paper feed unit
(6) Install by reversing the removal procedure.
Caution 1: Immediately after installing the paper
feed unit, as the swing gear and the
paper feed solenoid are not in the correct
position, it sometimes happens that
paper is not fed. For this reason, always
make a copy to confirm that operation is
normal.
Caution 2: Install so that the swing gear shaft enters
the paper feed roller unit.
[3] Replacing the feed roller rubber and
double feed prevention rubber/upper
(1) Remove the paper feed unit.
(2) Remove the fixing rings and bearings.
(3) While withdrawing the paper feed shaft, remove the
double feed prevention roller/upper from the paper
feed roller unit.
Double feed prevention roller/upper
Feed shaft
Paper feed roller unit
Stopper rings
(4) Removing the fixing ring and remove the feed roller
by withdrawing the guide shaft in the direction
shown by the arrow.
(5) Remove the feed rubber form the feed roller.
(6) Remove the feed shaft and then remove the double
feed prevention roller/upper.
(7) Remove the double feed prevention rubber/upper
from the double feed prevention roller/upper.
Feed rubber
Paint mark
Fixing ring
Feed roller
Guide shaft
Feed shaft
Double feed
prevention
roller/upper
Double feed
prevention
rubber/upper
(8) Install by reversing the removal procedure.
Caution: Pay attention to the direction in which you install
each roller rubber. Install so that the swing-gear
shaft enters the paper feed roller unit.
22
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