Konica Minolta DB-211 User Manual
SERVICE MANUAL
MODEL
DB-211
Drawer Base Unit
NOVEMBER 2002
CSM-DB211
DB-211
SERVICE MANUAL
Used On Model 7145
November 2002
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 Publishing Department
© 2002, KONICA BUSINESS TECHNOLOGIES, INC.
All rights reserved.
Printed in U.S.A.
CONTENTS
CONTENTS
SAFETY AND IMPORTANT WARNING ITEMS
Refer to the 7145 service manual on page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-1
I OUTLINE
1. DB-211 PRODUCT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
2. CENTER CROSS-SECTIONAL DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
3. DRIVE SYSTEM DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
II UNIT EXPLANATION
1. PAPER FEED SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
1.1 Composition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
1.2 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
1.2.1 Tray up drive control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
1.2.2 Paper feed control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
1.2.3 Remaining paper detection control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
1.2.4 Paper size detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
III DISASSEMBLY/ASSEMBLY
1. PAPER FEED SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
1.1 Removing and reinstalling the paper feed tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
1.2 Removing and reinstalling the paper feed unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
1.3 Replacing the paper feed rubber and the feed rubber. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
1.4 Replacing the double feed prevention rubber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
I OUTLINEII UNIT EXPLANATIONIII DIS./ASSEMBLY
iii
CONTENTS
I OUTLINE
II UNIT EXPLANATION
III DIS./ASSEMBLY
Blank page
iv
I OUTLINE
1. DB-211 PRODUCT SPECIFICATIONS
DB-211 PRODUCT SPECIFICATIONS
A. Type
Type: Front loading type paper feed tray
B. Functions
Paper size (for metric area): A3, B4, A4, A4R, B5, A5R, F4, 11 x 17, 8.5 x 11, 8.5 x 11R
Paper size (for inch area): 11 x 17, 8.5 x 14, 8.5 x 11, 8.5 x 11R, 5.5 x 8.5
A3, A4, A4R, A5R
Applicable copy paper: 60g/m
Maximum tray capacity: 500 Sheets x 2 trays (80g/m
2
to 105g/m2 (16lbs to 24lbs), high-quality paper
2
or 20lbs)
C. Machine data
Power source: DC24V/5V (supplied from main body)
Power consumption: Maximum 40VA (when the heater available optionally in the field is not
used.)
Weight: Approx. 25.9kg
Dimensions: 580mm (W) x 595mm (D) x 311mm (H)
I OUTLINE
D. Maintenance and life
Maintenance: Same as the main body
Machine service life: Same as the main body
E. Operating environment
Temperature: 10°C to 30°C (50°F to 86°F)
Humidity: 10% RH to 80% RH
Note:
• The information herein may be subject to change for improvement without notice.
1-1
CENTER CROSS-SECTIONAL DIAGRAM
2. CENTER CROSS-SECTIONAL DIAGRAM
I OUTLINE
3. DRIVE SYSTEM DIAGRAM
[4]
[6]
[7]
[1]
[2]
[3]
[5]
[1] Double feed prevention roller [5] Paper lift plate
[2] Conveyance roller [6] Paper feed roller
[3] Paper feed path for the double sided copy [7] Feed roller
[4] Paper lift lever
[10]
[11]
[6]
[7]
[2]
[3]
[8]
[1]
[4]
[5]
[9]
[1] SD101 (Paper feed solenoid /U) [7] M102 (Tray up drive motor /4)
[2] M101 (Tray up drive motor /3) [8] Paper lift plate /L
[3] Paper lift plate /U [9] Conveyance roller
[4] M100 (DB paper feed motor) [10] Conveyance roller
[5] Feed roller /L [11] Feed roller /U
[6] SD102 (Paper feed solenoid /L)
1-2
II UNIT EXPLANATION
1. PAPER FEED SECTION
1.1 Composition
PAPER FEED SECTION
[1] [2][18][17][16][15][14][13][12]
[11]
SD101
[10]
[9]
[3][4][5][6][7][8]
Symbol Name Function or method
[1] Conveyance roller Paper convey anc e
[2] Conveyance roller Paper convey anc e
[3] Feed roller Paper conveyance
[4] Double feed prevention roller Prevent double feed of paper, Torque limiter
[5] M102 (Tray up drive motor /4) Driving of the paper lift plate, 24 VDC brush motor
[6] PS107 (Tray upper limit sensor /4) Detection of the tray paper upper limit
[7] PS108 (No paper sensor /4) Detection of the presence of paper
[8] PS106 (Tray sensor /4) Tray detection and remaining paper detection
[9] Paper feed roller Paper conveyance
[10] PS105 (Paper feed sensor /L) Detection of the paper passage from the lower tray
[11] PS101 (Tray sensor /3) Tray detection and remaining paper detection
[12] M101 (Tray up drive motor /3) Driving of paper lift plate, 24 VDC brushless motor
[13] PS103 (No paper sensor /3) Detection of the presence of paper
[14] PS102 (Tray upper limit sensor /3) Detection of the tray paper upper limit
[15] Paper feed roller Paper conveyance
[16] Double feed prevention roller Prevent double feed of paper, Torque limiter
[17] Feed roll er Paper convey ance
[18] PS104 (Paper feed sensor /U) Detection of the paper passage from the upper tray
M100 DB paper feed motor
SD101 Paper feed solenoid /U Transmission of driving force to the paper feed roller unit
SD102 Paper feed solenoid /L Transmission of driving force to the paper feed roller unit
Driving of the paper feed system, DC brushless mot or PLL control
SD102
M100
DBDB
II UNIT EXPLANATION
2-1
PAPER FEED SECTION
1.2 Operation
Since the operation of the uppe r tray is the same as that for the lower tra y, the explanation is given of the
upper tray only.
1.2.1 Tray up drive control
When the paper feed tr ay is set, the PS101 (Tray sensor /3) de tec ts the tr ay to t ur n on the M1 01 (Tray up
drive motor /3). As a result, the paper lift plate in the tray goes up.
When the PS1 02 (Tray upper limi t sensor /3) is turn ed on to de tect th e paper upper li mit, the M1 01 goes
off. When paper is fed and the PS102 is turned off, the M102 lifts the paper lift plat e until the PS102 is
turned on again. When the tray is pulled out, the coupling is released and the paper lift plate goes down by
its own weight.
1.2.2 Paper feed control
II UNIT EXPLANATION
The paper feed s ystems ar e driven by the M 100 (DB pa per feed motor). W hen the S D101 (Pa per feed
solenoid /U) is turned on, the 1st paper feed section feeds paper to the registration section.
2-2
PAPER FEED SECTION
1.2.3 Remaining paper detection control
The remaining paper quantity is detected by the PS101 (Tray sensor /3). The paper lift plate goes up gradually as the quant ity of pape r in the tra y is gettin g reduce d. Interl ocking with the pa per lift plat e that goe s
up, the actuator at th e rea r of the tray rotates . The PS10 1 detects the r emain ing pa per quan tity b y co unting the number of ON/OFF of the slits in the actuator after the tray is loaded.
0 count: Full, 1 count: Medium, 2 counts: Low
No paper detection is made by the PS103 (No paper sensor /3).
[1]
[2]
[3]
[4]
[6]
[1] Direction of rotation when the paper up/down plate rises [4] Slit 2
[2] PS101 (Tray sensor /3) [5] Actuator
[3] Slit 1 [6] PS103 (No paper sensor/3)
1.2.4 Paper size detection
The paper size in the tray can be set by turning the PSDTB /3 (Paper size detection board /3) by hand, and
the DBDB (DB drive b oard) d etects a swit ch sign al acc ording to th e positio n o f the SW 1. The tab le bel ow
shows the relationship between the switch signal and the paper size.
For metric area
Switch signal
Paper size
SIZE A SIZE B SIZE C SIZE D
11 x 17
B5 !
B4 !
A5R !!
A4 !
A4R !!
A3 !!
F4 !!!
8.5 x 11 !
8.5 x 11R !!
[5]
II UNIT EXPLANATION
2-3
PAPER FEED SECTION
For inch area
II UNIT EXPLANATION
Paper size
SIZE A SIZE B SIZE C SIZE D
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 !!
Switch signal
2-4
III DISASSEMBLY/ASSEMBLY
Caution:
• Make sure the power cord of the copier is
unplugged from the power outlet before disassembly or assembly.
1. PAPER FEED SECTION
1.1 Removing and reinstalling the paper feed tray
1. Pull out the pa per feed tr ay [1] and take out the
2 screws [2] on the right side.
2. Remove the paper fe ed tray [1] from the guide
rails [3].
3. Reinstall the above parts following the remova l
steps in reverse.
[2]
PAPER FEED SECTION
1.2 Removing and reinstalling the paper feed unit
1. Remove the paper feed tray.
2. Remove the 4 claws [1] in the arrow-marked
direction, and remove the tray cover [2].
[2]
[1]
[1]
[3]
III DIS./ASSEMBLY
[1]
3-1
PAPER FEED SECTION
3. Open the paper feed door, take out the 3 screws
[1] and remove the paper size setting unit [2].
[2]
4. Remove the 3 screws [1] and remove the cover
[2].
[1]
[2]
[1]
III DIS./ASSEMBLY
5. Remove the paper size setting unit connector
[1].
3-2
[1]
6. When the LT is installed, remove the screw [1]
and then remove the LT guide plate unit [2].
PAPER FEED SECTION
7. Remove each of the screws [1] in dicated by the
arrow mark, and then remove the paper feed
unit [2] to forward.
8. Reinstall the above parts following the remova l
steps in reverse.
Note:
• Be sure t o install the paper feed unit [2] s o that
the arrow mark impressed on the notched section
[3] of the paper feed unit [2] comes above the
hook [4].
• Install the paper feed un it [2] so that th e hook [5]
of the paper feed rol ler holder comes above the
paper feed roller release arm [6].
[2]
[1]
[3]
[4]
[2]
[1]
[3]
[6] [5]
III DIS./ASSEMBLY
3-3
PAPER FEED SECTION
1.3 Replacing the paper feed rubber and the feed rubber
A. Periodically replaced parts/cycle
• Paper feed rubber: Every 480,000 cop ies (once
for every 200,000 copies for actual durable
count)
• Feed rubber: Every 480,000 copies (once for
every 200,000 copies for actual durable count)
B. Procedure
1. Remove the paper feed unit.
2. Remove the 2 stop ri ngs [1] and the front side
bearing [2]. Then slide the re ar side bearing [3]
to the rear to remove the paper fee d roller unit
[4].
[3]
[4]
[2]
[1]
III DIS./ASSEMBLY
3. Remove the collar [1] and pull out the feed shaft
[2].
4. Remove the feed rubber [4] from the feed roller
[3].
5. Remove the stop ring [5] and pul l out the paper
feed shaft [6].
6. Remove the paper feed rubber [8] from the
paper feed roller [7].
7. Reinstall the above par ts following the removal
steps in reverse.
Note:
• Be su re to install the feed rubber [4] so that the
paint mark [9] turns in the direction show n in the
drawing.
[9]
[5]
[8]
[7]
[6]
[2]
[1]
[4]
[3]
3-4
1.4 Replacing the double feed prevention rubber
A. Periodically replaced parts/cycle
• Double feed prevention rubber: Every 480,000
copies (once for every 2 00,000 cop ies for actua l
durable count)
B. Procedure
1. Remove the paper feed unit.
2. Remove the screw [1].
3. Pushing the knobs [2] on both sides with your
fingers and remove the double feed prevention
roller unit [3].
PAPER FEED SECTION
[3]
[2]
4. While pushing the lever [2] of the lever click
shaft [1], pull out the lever click shaft [1] and
remove the double feed prevention roller.
5. Remove the double feed prevention rubber [4]
from the double feed prevention roller [3].
6. Reinstall the above parts following the remova l
steps in reverse.
Note:
• Be su re to in stall the double f eed preven tion rub ber so that the paint mark [5 ] shown abo ve turns
in the direction shown in the drawing.
• When ins talling the double feed preventi on roller
unit [1], be sure to align the upper section of the
claw [2] with the center (the lo ngest scale) of the
marking [3] impressed on the plate for leveling.
[5]
[1]
[4]
III DIS./ASSEMBLY
[3]
[2]
[1]
[1]
[3]
[2]
3-5
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