Konica Minolta 7165 User manual

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Copiers
Type
User manual

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SERVICE MANUAL
Models
7155/7165/7255/7272
JANUARY 2004
CSM-7155/7165/7255/7272
KONICA MINOLTA BUSINESS SOLUTIONS U.S.A., INC.
7155/7165/7255/7272
SERVICE MANUAL
JANUARY 2004
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 Minolta Business
Solutions U.S.A., Inc. strongly recommends that all
servicing be performed by Konica Minolta-trained serv-
ice technicians only.
Changes may have been made to this equipment to
improve its performance after this service manual was
printed. Accordingly, Konica Minolta Business Solutions
U.S.A., Inc., makes no representations or warranties,
either expressed or implied, that the information con-
tained 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 equip-
ment while servicing the equipment for which this serv-
ice manual is intended.
© 2004, KONICA MINOLTA BUSINESS SOLUTIONS U.S.A. , INC.
All rights reserved.
Printed in U.S.A.
Corporate Publications Department
SAFETY AND IMPORTANT WARNING
ITEMS
. . . . .S-1
IMPORTANT NOTICE . . . . . . . . . . . . . . . . . . S-1
DESCRIPTION ITEMS FOR DANGER,
WARNING AND CAUTION . . . . .S-1
SAFETY WARNINGS . . . . . . . . . . . . . . . . . . .S-2
SAFETY INFORMATION . . . . . . . . . . . . . . .S-10
IMPORTANT INFORMATION . . . . . . . . . . . S-10
SAFETY CIRCUITS . . . . . . . . . . . . . . . . . . S-11
INDICATION OF WARNING ON THE MACHINE
. . .S-13
CONTENTS
CONTENTS
3 DIS./ASSEMBLY2 UNIT EXPLANATION 3 DIS./ASSEMBLY1 OUTLINE3 DIS./ASSEMBLY3 DIS./ASSEMBLY
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
- REPLACEMENT
4
LIST OF DIFFERENCE for 7155/7165 and
7255/7272.....................................................................1
1. OUTLINE
OUTLINE OF SYSTEM .............................................1-1
7155/7165/7255/7272 PRODUCT
SPECIFICATIONS.....................................................1-2
CENTRAL CROSS-SECTIONAL VIEW....................1-4
DRIVE SYSTEM DIAGRAM......................................1-5
[1] Fixing/Web Drive Section...........................1-5
[2] Drum Drive Section....................................1-6
[3] Developing Drive Section...........................1-6
[4] Paper Feed/Vertical Conveyance/Tray Up
Drive Section..............................................1-7
[5] Bypass Paper Feed/ADU Pre-registration
Drive Section..............................................1-8
[6] Charging and Transfer/Separation Wire
Cleaning Drive Section...............................1-9
[7] ADU Conveyance Drive Section..............1-10
[8] Paper Exit Drive Section ..........................1-11
[9] Toner Supply Drive Section......................1-11
[10] Optics Drive Section.................................1-12
2. UNIT EXPLANATION
EXTERNAL SECTION...........................................2-A-1
[1] Composition ...........................................2-A-1
DRIVE SECTION...................................................2-B-1
[1] Composition ...........................................2-B-1
[2] Mechanisms...........................................2-B-1
[3] M2 (Drum) Control..................................2-B-2
[4] M4 (Fixing) Control.................................2-B-3
SCANNER SECTION............................................2-C-1
[1] Composition ...........................................2-C-1
[2] Mechanisms...........................................2-C-1
[3] M11 (Scanner) Control...........................2-C-2
[4] Exposure control ....................................2-C-5
[5] Original Read Control.............................2-C-5
[6] APS Control............................................2-C-6
[7] AE Control..............................................2-C-7
WRITE UNIT..........................................................2-D-1
[1] Composition ...........................................2-D-1
[2] Mechanisms...........................................2-D-1
[3] M15 (Polygon) Control ...........................2-D-2
[4] Image Write Control ...............................2-D-3
DRUM UNIT...........................................................2-E-1
[1] Composition ...........................................2-E-1
[2] Mechanisms...........................................2-E-1
[3] Separation Claw Control ........................2-E-2
[4] Paper Guide Plate Control .....................2-E-2
CORONA UNIT SECTION.....................................2-F-1
[1] Composition ...........................................2-F-1
[2] Mechanisms...........................................2-F-1
[3] Charging Control....................................2-F-2
[4] Transfer/Separation Control...................2-F-3
[5] M14 (Charger Cleaning) Control ............ 2-F-4
CONTENTS
3 DIS./ASSEMBLY1 OUTLINE3 DIS./ASSEMBLY2 UNIT EXPLANATION3 DIS./ASSEMBLY3 DIS./ASSEMBLY
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
-REPLACEMENT
4
[6] M10 (Transfer/Separation Cleaning)
Control....................................................2-F-5
[7] PCL/TSL Control ....................................2-F-6
DEVELOPING UNIT............................................. 2-G-1
[1] Composition........................................... 2-G-1
[2] Mechanisms.......................................... 2-G-1
[3] M3 (Developing) Control........................ 2-G-2
[4] Developing Bias Control........................ 2-G-3
[5] Dmax Control......................................... 2-G-4
[6] Gradation Correction Control................. 2-G-6
[7] Dot Diameter Correction Control........... 2-G-7
[8] Toner Density Control............................ 2-G-7
[9] FM4 (Developing Suction) Control ........ 2-G-8
TONER SUPPLY UNIT..........................................2-H-1
[1] Composition............................................2-H-1
[2] Mechanisms...........................................2-H-1
[3] Toner Level Detection Control................2-H-2
[4] M12 (Toner Supply) Control...................2-H-3
CLEANING/TONER RECYCLE UNIT ....................2-I-1
[1] Composition.............................................2-I-1
[2] Mechanisms............................................ 2-I-1
[3] TGR (Toner Guide Roller) Control........... 2-I-2
[4] Other Control...........................................2-I-2
TRAY 1/2 (7155, 7165), TRAY 3/4 (7255/7272)
PAPER FEED UNIT............................................... 2-J-1
[1] Composition............................................ 2-J-1
[2] Mechanisms........................................... 2-J-1
[3] First Paper Feed Control........................ 2-J-3
[4] Paper Up Drive Control .......................... 2-J-5
[5] Paper Size Detection Control................. 2-J-6
[6] No paper detection control ..................... 2-J-7
TRAY 1/2 PAPER FEED UNIT (7255/7272).......... 2-J-8
[1] Composition............................................ 2-J-8
[2] Mechanisms........................................... 2-J-8
[3] First Paper Feed Control...................... 2-J-10
[4]
Horizontal Conveyance Control (Tray 1)
.... 2-J-12
[5] Paper Up Drive Control ........................ 2-J-14
[6] No paper detection control ................... 2-J-15
TRAY 3 PAPER FEED UNIT (7155/7165).............2-K-1
[1] Composition............................................2-K-1
[2] Mechanisms...........................................2-K-1
[3] First Paper Feed Control........................2-K-3
[4] Paper Up Drive Control ..........................2-K-5
[5] Paper Size Detection Control.................2-K-6
[6] No paper detection control .....................2-K-7
BY-PASS TRAY..................................................... 2-L-1
[1] Composition............................................2-L-1
[2] Mechanisms........................................... 2-L-1
[3] First Paper Feed Control........................ 2-L-2
[4] Paper Up/Down Control.......................... 2-L-3
[5] Paper Size Detection Control................. 2-L-4
[6] No paper detection control .....................2-L-5
VERTICAL CONVEYANCE SECTION.................2-M-1
[1] Composition...........................................2-M-1
[2] Mechanisms.......................................... 2-M-1
[3] Vertical Conveyance Control.................2-M-2
ADU.......................................................................2-N-1
[1] Composition...........................................2-N-1
[2] Mechanisms...........................................2-N-2
[3] Loop/Second Paper Feed Control..........2-N-7
[4] Paper Conveyance Control....................2-N-9
[5] Paper Reverse and Exit Control...........2-N-10
[6] ADU Paper Conveyance/Feed
Control..................................................2-N-13
FIXING UNIT.........................................................2-O-1
[1] Composition...........................................2-O-1
[2] Mechanisms...........................................2-O-1
[3] M16 (Web Drive) Control .......................2-O-3
[4] Fixing Temperature Control ...................2-O-4
OTHER KINDS OF CONTROL .............................2-P-1
[1] Parts Energized when SW1
(Main Power) is OFF.............................2-P-1
[2] Parts that Operate when SW1 (Main
Power)/SW2 (Sub Power) is ON............2-P-2
[3] Cooling Fan Control...............................2-P-3
[4] Operation Panel Control.........................2-P-6
[5] Counter Control......................................2-P-8
[6] Option Control........................................2-P-9
3. DISASSEMBLY/ASSEMBLY
EXTERNAL SECTION...........................................3-A-1
[1] Replacing the Ozone Filter.....................3-A-1
[2] Replacing the Developing Suction
Filter ....................................................3-A-1-1
[3] Removing and Reinstalling the External
Covers....................................................3-A-2
[4] Changing the Operation Panel Attachment
Angle and Removing/Reinstalling..........3-A-4
[5] Resetting the Circuit Breaker.................3-A-6
DRIVE SECTION...................................................3-B-1
[1] Removing and Reinstalling the Drum
Motor(M2)...............................................3-B-1
[2] Removing and Reinstalling the Fixing
Input Gear..............................................3-B-2
SCANNER SECTION............................................3-C-1
[1] Screws that Must not be Removed........3-C-1
[2] Removing and Reinstalling the
CCD Unit................................................3-C-1
[3] Replacing the Exposure Lamp...............3-C-2
[4] Removing and Reinstalling
the Exposure Unit...................................3-C-3
[5] Installing the Optics Wire .......................3-C-4
[6] Cleaning the Slit Glass
and Platen Glass....................................3-C-6
[7] Replacing the Scanner Motor (M11) ......3-C-6
WRITE SECTION..................................................3-D-1
[1] Removing and Reinstalling
the Write Unit .........................................3-D-1
[2] Cleaning the Dust-proof Glass...............3-D-2
DRUM UNIT ..........................................................3-E-1
[1] Removing and Reinstalling
the Drum Unit.........................................3-E-1
CONTENTS
3 DIS./ASSEMBLY1 OUTLINE3 DIS./ASSEMBLY2 UNIT EXPLANATION3 DIS./ASSEMBLY3 DIS./ASSEMBLY
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
- REPLACEMENT
4
[2] Installing the Coupling............................3-E-2
[3] Removing, Cleaning, and Reinstalling
the Drum.................................................3-E-3
[4] Removing and Reinstalling the Separation
Claws and Separation Claw Solenoid.....3-E-4
[5] Removing and Reinstalling the Toner
Control Sensor Board.............................3-E-6
CORONA UNIT......................................................3-F-1
[1] Screws that Must not be Removed.........3-F-1
[2] Removing and Reinstalling the Charging
Corona Unit ............................................3-F-1
[3] Removing and Reinstalling the Charge
Control Plate...........................................3-F-2
[4] Replacing the Charging Wires................3-F-2
[5] Removing and Reinstalling the Charging
Wire Cleaning Unit.................................3-F-3
[6] Removing and Reinstalling the PCL.......3-F-3
[7] Cleaning the Charging Corona
Unit/PCL.................................................3-F-4
[8] Removing and Reinstalling the Transfer/
Separation Corona Unit..........................3-F-4
[9] Removing and Reinstalling the Plunger
Prevention Plate.....................................3-F-5
[10] Replacing the Transfer/Separation
Wires and Transfer/Separation Wire
Cleaning Block........................................3-F-5
[11] Removing and Reinstalling the TSL
Unit .........................................................3-F-7
DEVELOPING UNIT............................................. 3-G-1
[1] Screws that must not be Removed........ 3-G-1
[2] Removing and Reinstalling the
Developing Unit.....................................3-G-1
[3] Replacing the Developer ....................... 3-G-2
[4] Cleaning the Developing Unit
Bias shaft...............................................3-G-3
TONER SUPPLY UNIT......................................... 3-H-1
[1] Replacing and Cleaning
the Toner Cartridge ............................... 3-H-1
CLEANING/TONER RECYCLE UNIT.....................3-I-1
[1] Removing and Reinstalling
the Cleaning Blade ..................................3-I-1
[2] Removing and Reinstalling the Toner
Guide Roller (TGR)..................................3-I-2
PAPER FEED UNITS OF TRAYS 1 AND 2
(7155/7165)............................................................ 3-J-1
[1] Removing and Reinstalling the Paper
Feed Unit................................................ 3-J-1
[2] Removing and Reinstalling the Paper
Feed Trays 1 and 2 ................................ 3-J-1
[3] Removing and Reinstalling the Paper
Feed Roller and Feed Roller Rubber...... 3-J-2
[4] Removing and Reinstalling the Double
Feed Prevention Roller Rubber.............. 3-J-2
[5] Replacing the Pre-registration and
Feed Clutches (MCs).............................. 3-J-3
[6] Replacing the Wires................................3-J-4
PAPER FEED UNITS OF TRAYS 1 AND 2
(7255/7272) ............................................................3-J-7
[1] Removing and Reinstalling the Paper
Feed Unit.................................................3-J-7
[2] Removing and Reinstalling the Paper
Feed Tray 1.............................................3-J-7
[3] Removing and Reinstalling the Paper Feed
Tray 2......................................................3-J-8
[4] Removing and Reinstalling the Paper
Feed Roller and Feed Roller Rubber ......3-J-9
[5] Removing and Reinstalling the Double
Feed Prevention Roller Rubber.............3-J-10
[6] Replacing the Pre-registration and
Feed Clutches (MCs) ............................3-J-11
[7] Replacing the Horizontal Conveyance MC/L
and/ R....................................................3-J-11
[8] Replacing the Wires..............................3-J-12
PAPER FEED UNIT OF TRAY 3 (7155/7165).......3-K-1
[1] Removing and Reinstalling the Paper
Feed Unit................................................3-K-1
[2] Removing and Reinstalling
Paper Feed Tray 3 .................................3-K-1
[3] Removing and Reinstalling the Paper
Feed Roller and Feed Roller Rubber ....3-K-2
[4] Removing and Reinstalling the Double
Feed Prevention Roller Rubber..............3-K-2
[5] Replacing the Pre-registration and
Feed Clutches (MCs) .............................3-K-3
[6] Replacing the Wires...............................3-K-4
PAPER FEED UNIT OF TRAY 3 AND 4
(7255/7272) ...........................................................3-K-7
[1] Removing and Reinstalling the Paper
Feed Unit................................................3-K-7
[2] Removing and Reinstalling
Paper Feed Tray 3and 4 ........................3-K-7
[3] Removing and Reinstalling the Paper
Feed Roller and Feed Roller Rubber ....3-K-8
[4] Removing and Reinstalling the Double
Feed Prevention Roller Rubber..............3-K-8
[5] Replacing the Pre-registration and
Feed Clutches (MCs) .............................3-K-9
[6] Replacing the Wires...............................3-K-9
BY-PASS FEED TRAY.......................................... 3-L-1
[1] Removing and Reinstalling the by-pass
Feed Tray.............................................. 3-L-1
[2] Replacing the Paper Feed Roller/Paper
Feed Roller Rubber................................3-L-1
[3] Replacing the Double Feed Prevention
Roller Rubber......................................... 3-L-2
VERTICAL CONVEYANCE SECTION................. 3-M-1
[1] Removing and Reinstalling the Vertical
Conveyance Section............................. 3-M-1
[2] Removing and Reinstalling the Vertical
Conveyance MC (MC11, MC12)........... 3-M-1
CONTENTS
3 DIS./ASSEMBLY1 OUTLINE3 DIS./ASSEMBLY2 UNIT EXPLANATION3 DIS./ASSEMBLY3 DIS./ASSEMBLY
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
-REPLACEMENT
4
ADU UNIT..............................................................3-N-1
[1] Drawing out and Reinstalling
the ADU Stand........................................3-N-1
[2] Cleaning the Paper Dust
Removing Brush.....................................3-N-1
[3] Cleaning the Paper Mis-centering PS
(PS70)/Leading Edge PS (PS43)...........3-N-2
[4] Removing and Reinstalling the
Registration MC (MC1)...........................3-N-2
[5] Removing and Reinstalling the Second
Paper Feed Unit ................................ 3-N-3-1
[6] Cleaning the Registration PS (PS44).....3-N-4
[7] Removing and Reinstalling the
Registration Roller..................................3-N-5
[8] Removing and Reinstalling the
Pre-transfer Roller..................................3-N-6
[9] Cleaning the ADU Paper Reverse
PS (PS45)/Reverse/Exit PS (PS46).......3-N-7
[10] Removing and Reinstalling the ADU
Reverse Roller........................................3-N-9
[11] Removing and Reinstalling
the ADU Stand......................................3-N-10
[12] Removing and Reinstalling the Pre-
registration Roller.................................3-N-11
[13] Removing and Reinstalling the ADU
Conveyance Roller 3 and 4..................3-N-12
[14] Removing and Reinstalling the ADU
Conveyanece Roller 1 and 2................3-N-15
[15] Removing and Reinstalling the Paper
Reverse/Exit Roller...............................3-N-17
FIXING UNIT ........................................................ 3-O-1
[1] Removing and Reinstalling
the Fixing Unit........................................ 3-O-1
[2] Removing and Reinstalling
the Fixing Unit (Top).............................. 3-O-1
[3] Removing and Reinstalling
the Web Cover....................................... 3-O-2
[4] Removing and Reinstalling
the Cleaning Web.................................. 3-O-2
[5] Replacing the Fixing Heater
Lamps (L2, L3) ...................................... 3-O-3
[6] Replacing the Fixing Heater
Lamp(L4)............................................... 3-O-4
[7] Removing and Reinstalling the Fixing
Separation Claw (Upper) Unit and Fixing
Separation Claws (Upper)..................... 3-O-5
[8] Removing and Reinstalling the Fixing
Separation Claw (Lower) Unit and Fixing
Separation Claws (Lower)..................... 3-O-6
[9] Removing and Reinstalling the Fixing
Upper Roller and Fixing Drive Gear ...... 3-O-7
[10] Removing and Reinstalling the Fixing
Lower Roller .......................................... 3-O-8
[11] Removing and Reinstalling
the Decurler........................................... 3-O-8
[12] Removing and Reinstalling the Fixing
Temperature Sensors 1 and 2 ...............3-O-9
[13] Removing and Reinstalling the
Thermostat (TS1).................................3-O-11
[14] Removing and Reinstalling the
Thermostat (TS2).................................3-O-12
SAFETY AND IMPORTANT WARNING ITEMS
S-1
Read carefully the Safety and Important Warning Items described below to understand them before doing ser-
vice work.
Because of possible hazards to an inexperienced person servicing this copier as well as the risk of damage to
the copier, Konica Minolta Business Technologies, INC. (hereafter called the KMBT) strongly recommends that
all servicing be performed only by KMBT-trained service technicians.
Changes may have been made to this copier to improve its performance after this service manual was printed.
Accordingly, KMBT does not warrant, either explicitly or implicitly, that the information contained in this service
manual is complete and accurate.
The user of this service manual must assume all risks of personal injury and/or damage to the copier while ser-
vicing the copier for which this service manual is intended.
Therefore, this service manual must be carefully read before doing service work both in the course of technical
training and even after that, for performing maintenance and control of the copier properly.
Keep this service manual also for future service.
In this service manual, each of three expressions “ DANGER”, “ WARNING”, and “ CAUTION” is defined
as follows together with a symbol mark to be used in a limited meaning.
When servicing the copier, the relevant works (disassembling, reassembling, adjustment, repair, maintenance,
etc.) need to be conducted with utmost care.
Symbols used for safety and important warning items are defined as follows:
SAFETY AND IMPORTANT WARNING ITEMS
IMPORTANT NOTICE
DESCRIPTION ITEMS FOR DANGER, WARNING AND
CAUTION
4
4
DANGER
:Action having a high possibility of suffering death or serious injury
WARNING
:Action having a possibility of suffering death or serious injury
CAUTION
:Action having a possibility of suffering a slight wound, medium trouble, and
property damage
:Precaution when using the copier.
General precaution Electric hazard High temperature
:Prohibition when using the copier.
General prohibition Do not touch with wet hand Do not disassemble
:Direction when using the copier.
General instruction
Unplug
Ground
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
S-1 REPLACEMENT
4
SAFETY AND IMPORTANT WARNING ITEMS
S-2
[1] MODIFICATIONS NOT AUTHORIZED BY
KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
Konica Minolta brand copiers are renowned for their high reliability. This reliability is achieved through high-quality design
and a solid service network.
Copier design is a highly complicated and delicate process where numerous mechanical, physical, and electrical aspects
have to be taken into consideration, with the aim of arriving at proper tolerances and safety factors. For this reason, unau-
thorized modifications involve a high risk of degradation in performance and safety. Such modifications are therefore
strictly prohibited. the points listed below are not exhaustive, but they illustrate the reasoning behind this policy.
SAFETY WARNINGS
DANGER : PROHIBITED ACTIONS
Using any cables or power cord not specified by KMBT.
Using any fuse or thermostat not specified by KMBT. Safety will not be
assured, leading to a risk of fire and injury.
Disabling fuse functions or bridging fuse terminals with wire, metal clips, sol-
der or similar object.
Disabling relay functions (such as wedging paper between relay contacts)
Disabling safety functions (interlocks, safety circuits, etc.) Safety will not be
assured, leading to a risk of fire and injury.
Making any modification to the copier unless instructed by KMBT
Using parts not specified by KMBT
4
4
4
4
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
S-2 REPLACEMENT
4
4
SAFETY AND IMPORTANT WARNING ITEMS
S-3
[2] CHECKPOINTS WHEN PERFORMING ON-SITE SERVICE
Konica Minolta brand copiers are extensively tested before shipping, to ensure that all applicable safety standards are met,
in order to protect the customer and customer engineer (hereafter called the CE) from the risk of injury. However, in daily
use, any electrical equipment may be subject to parts wear and eventual failure. In order to maintain safety and reliability,
the CE must perform regular safety checks.
1.Power Supply
WARNING: Wall Outlet
Check that mains voltage is as specified. Plug the power cord into the dedi-
cated wall outlet with a capacity greater than the maximum power consump-
tion.
If excessive current flows in the wall outlet, fire may result.
If two or more power cords can be plugged into the wall outlet, the total load
must not exceed the rating of the wall outlet.
If excessive current flows in the wall outlet, fire may result.
WARNING: Power Plug and Cord
Make sure the power cord is plugged in the wall outlet securely.
Contact problems may lead to increased resistance, overheating, and the
risk of fire.
Check whether the power cord is damaged. Check whether the sheath is
damaged.
If the power plug, cord, or sheath is damaged, replace with a new power
cord (with plugs on both ends) specified by KMBT. Using the damaged
power cord may result in fire or electric shock.
When using the power cord (inlet type) that came with this copier, be sure to
observe the following precautions:
a. Make sure the copier-side power plug is securely inserted in the socket
on the rear panel of the copier.
Secure the cord with a fixture properly.
b. If the power cord or sheath is damaged, replace with a new power cord
(with plugs on both ends) specified by KMBT.
If the power cord (inlet type) is not connected to the copier securely, a
contact problem may lead to increased resistance, overheating, and risk
of fire.
Check whether the power cord is not stepped on or pinched by a table and
so on.
Overheating may occur there, leading to a risk of fire.
4
kw
4
4
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
S-3 REPLACEMENT
4
SAFETY AND IMPORTANT WARNING ITEMS
S-4
Do not bundle or tie the power cord.
Overheating may occur there, leading to a risk of fire.
Check whether dust is collected around the power plug and wall outlet.
Using the power plug and wall outlet without removing dust may result in
fire.
Do not insert the power plug into the wall outlet with a wet hand.
The risk of electric shock exists.
When unplugging the power cord, grasp the plug, not the cable.
The cable may be broken, leading to a risk of fire and electric shock.
WARNING: Wiring
Never use multi-plug adapters to plug multiple power cords in the same out-
let.
If used, the risk of fire exists.
When an extension cord is required, use a specified one.
Current that can flow in the extension cord is limited, so using a too long
extension cord may result in fire.
Do not use an extension cable reel with the cable taken up. Fire may
result.
WARNING: Ground Lead
Check whether the copier is grounded properly.
If current leakage occurs in an ungrounded copier, you may suffer electric
shock while operating the copier. Connect the ground lead to one of the
following points:
a. Ground terminal of wall outlet
b. Ground terminal for which Class D work has been done
WARNING: Power Plug and Cord
SAFETY AND IMPORTANT WARNING ITEMS
S-5
2.Installation Requirements
Pay attention to the point to which the ground lead is connected.
Connecting the ground lead to an improper point such as the points listed
below results in a risk of explosion and electric shock:
a. Gas pipe (A risk of explosion or fire exists.)
b. Lightning rod (A risk of electric shock or fire exists.)
c. Telephone line ground (A risk of electric shock or fire exists in the case
of lightning.)
d. Water pipe or faucet (It may include a plastic portion.)
WARNING: Prohibited Installation Place
Do not place the copier near flammable materials such as curtains or volatile
materials that may catch fire.
A risk of fire exists.
Do not place the copier in a place exposed to water such as rain water.
A risk of fire and electric shock exists.
WARNING: Nonoperational Handling
When the copier is not used over an extended period of time (holidays, etc.),
switch it off and unplug the power cord.
Dust collected around the power plug and outlet may cause fire.
CAUTION: Temperature and Humidity
Do not place the copier in a place exposed to direct sunlight or near a heat
source such as a heater.
A risk of degradation in copier performance or deformation exists.
Do not place the copier in a place exposed to cool wind.
Recommended temperature and humidity are as follows:
Temperature: 10
°
C
to 30
°
C
Humidity: 10% to 80% (no dew condensation)
Avoid other environments as much as possible.
CAUTION: Ventilation
Do not place the copier in a place where there is much dust, cigarette
smoke, or ammonia gas.
Place the copier in a well ventilated place to prevent machine problems
and image faults.
WARNING: Ground Lead
SAFETY AND IMPORTANT WARNING ITEMS
S-6
The copier generates ozone gas during operation, but it is not sufficient to be
harmful to the human body.
If a bad smell of ozone is present in the following cases, ventilate the
room.
a. When the copier is used in a poorly ventilated room
b. When taking a lot of copies
c. When using multiple copiers at the same time
CAUTION: Vibration
When installing the copier, read the Installation Guide thoroughly. Be sure to
install the copier in a level and sturdy place.
Constant vibration will cause problems.
Be sure to lock the caster stoppers.
In the case of an earthquake and so on, the copier may slide, leading to a
injury.
CAUTION: Inspection before Servicing
Before conducting an inspection, read all relevant documentation (service
manual, technical notices, etc.) and proceed with the inspection following the
prescribed procedure in safety clothes, using only the prescribed tools. Do
not make any adjustment not described in the documentation.
If the prescribed procedure or tool is not used, the copier may break and a
risk of injury or fire exists.
Before conducting an inspection, be sure to disconnect the power plugs from
the copier and options.
When the power plug is inserted in the wall outlet, some units are still pow-
ered even if the POWER switch is turned OFF. A risk of electric shock
exists.
The area around the fixing unit is hot.
You may get burnt.
DANGER: Work Performed with the Copier Powered
Take every care when making adjustments or performing an operation check
with the copier powered.
If you make adjustments or perform an operation check with the external
cover detached, you may touch live or high-voltage parts or you may be
caught in moving gears or the timing belt, leading to a risk of injury.
CAUTION: Ventilation
4
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
S-6 REPLACEMENT
4
SAFETY AND IMPORTANT WARNING ITEMS
S-7
Take every care when servicing with the external cover detached.
High-voltage exists around the drum unit. A risk of electric shock exists.
WARNING: Safety Checkpoints
Check the exterior and frame for edges, burrs, and other damages.
The user or CE may be injured.
Do not allow any metal parts such as clips, staples, and screws to fall into the
copier.
They can short internal circuits and cause electric shock or fire.
Check wiring for squeezing and any other damage.
Current can leak, leading to a risk of electric shock or fire.
When disconnecting connectors, grasp the connector, not the cable.
(Specifically, connectors of the AC line and high-voltage parts)
Current can leak, leading to a risk of electric shock or fire.
Carefully remove all toner remnants and dust from electrical parts and elec-
trode units such as a charging corona unit.
Current can leak, leading to a risk of copier trouble or fire.
Check high-voltage cables and sheaths for any damage.
Current can leak, leading to a risk of electric shock or fire.
Check electrode units such as a charging corona unit for deterioration and
sign of leakage.
Current can leak, leading to a risk of trouble or fire.
Before disassembling or adjusting the write unit incorporating a laser, make
sure that the power cord has been disconnected.
The laser light can enter your eye, leading to a risk of loss of eyesight.
Do not remove the cover of the write unit. Do not supply power with the write
unit shifted from the specified mounting position.
The laser light can enter your eye, leading to a risk of loss of eyesight.
When replacing a lithium battery, replace it with a new lithium battery speci-
fied in the Parts Guide Manual. Dispose of the used lithium battery using the
method specified by local authority.
Improper replacement can cause explosion.
DANGER: Work Performed with the Copier Powered
SAFETY AND IMPORTANT WARNING ITEMS
S-8
WARNING: Safety Checkpoints
After replacing a part to which AC voltage is applied (e.g., optical lamp and
fixing lamp), be sure to check the installation state.
A risk of fire exists.
Check the interlock switch and actuator for loosening and check whether the
interlock functions properly.
If the interlock does not function, you may receive an electric shock or be
injured when you insert your hand in the copier (e.g., for clearing paper
jam).
Make sure the wiring cannot come into contact with sharp edges, burrs, or
other pointed parts.
Current can leak, leading to a risk of electric shock or fire.
Make sure that all screws, components, wiring, connectors, etc. that were
removed for safety check and maintenance have been reinstalled in the orig-
inal location. (Pay special attention to forgotten connectors, pinched cables,
forgotten screws, etc.)
A risk of copier trouble, electric shock, and fire exists.
DANGER: HANDLING OF SERVICE MATERIALS
Toner and developer are not harmful substances, but care must be taken not
to breathe excessive amounts or let the substances come into contact with
eyes, etc. It may be stimulative.
If the substances get in the eye, rinse with plenty of water immediately.
When symptoms are noticeable, consult a physician.
Never throw the used cartridge and toner into fire.
You may be burned due to dust explosion.
SAFETY AND IMPORTANT WARNING ITEMS
S-9
[3] MEASURES TO TAKE IN CASE OF AN ACCIDENT
1. If an accident has occurred, the distributor who has been notified first must immediately take emergency measures to
provide relief to affected persons and to prevent further damage.
2. If a report of a serious accident has been received from a customer, an on-site evaluation must be carried out quickly
and KMBT must be notified.
3. To determine the cause of the accident, conditions and materials must be recorded through direct on-site checks, in
accordance with instructions issued by KMBT.
4. For reports and measures concerning serious accidents, follow the regulations given in “Serious Accident Report/
Follow-up Procedures”.
[4] CONCLUSION
1. Safety of users and customer engineers depends highly on accurate maintenance and administration. Therefore,
safety can be maintained by the appropriate daily service work conducted by the customer engineer.
2. When performing service, each copier on the site must be tested for safety. The customer engineer must verify the
safety of parts and ensure appropriate management of the equipment.
DANGER : HANDLING OF SERVICE MATERIALS
Unplug the power cord from the wall outlet.
Drum cleaner (isopropyl alcohol) and roller cleaner (acetone-based) are
highly flammable and must be handled with care. A risk of fire exists.
Do not replace the cover or turn the copier ON before any solvent remnants
on the cleaned parts have fully evaporated.
A risk of fire exists.
Use only a small amount of cleaner at a time and take care not to spill any
liquid. If this happens, immediately wipe it off.
A risk of fire exists.
When using any solvent, ventilate the room well.
Breathing large quantities of organic solvents can lead to discomfort.
4
4
MODEL MANUAL REVISED EDITION DATE PAGE METHOD
SERVICE MANUAL Dec. 2003
7155/7165/7255/7272
S-9 REPLACEMENT
4
SAFETY AND IMPORTANT WARNING ITEMS
S-10
The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration implemented
regulations for laser products manufactured since August 1, 1976. Compliance is mandatory for products mar-
keted in the United States.
This copier is certified as a “Class 1” laser product under the U.S.
Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation
Control for Health and Safety Act of 1968. Since radiation emitted inside this copier is completely confined within
protective housings and external covers, the laser beam cannot escape during any phase of normal user opera-
tion.
SAFETY INFORMATION
IMPORTANT INFORMATION
SAFETY AND IMPORTANT WARNING ITEMS
S-11
This machine is provided with the following safety circuits
to prevent machine faults from resulting in serious acci-
dents.
[1] Overall protection circuit
[2] L2 and L3 (fixing heater lamps) overheating
prevention circuit
These safety circuits are described below to provide the
service engineer with a renewed awareness of them in
order to prevent servicing errors that may impair their
functions.
[1] Overall Protection Circuit
1. Protection by CBR1 and CBR2 (circuit
breakers)
CBR1 and CBR2 interrupt the AC line instanta-
neously when an excessive current flows due to a
short in the AC line.
CAUTION:
The CBR1 and CBR2 functions must not
be deactivated under any circumstances.
[2] Protection by L2, L3 and L4 (Fixing
Heater Lamps) Overheating Preven-
tion Circuit
1. Protection by software
The output voltage from TH1 (fixing temperature
sensor 1) is read by the CPU. If this voltage is
abnormal, L2 (fixing heater lamp 1), L3 (fixing
heater lamp 2), L4 (fixing heater lamp 3) and RL1
(main relay) are turned OFF.
CAUTION:
Do not change the gap between the roller
and TH1. When replacing TH1, check the
specified mounting dimensions. The RL1
function must not be deactivated under
any circumstances.
SAFETY CIRCUITS
NF
CBR2
CBR1
L3
L4
DCPS
PRCB
L2
Control
section
TH2
TH1
RL1
RL1
TS1
TS2
AC driver
section
SAFETY AND IMPORTANT WARNING ITEMS
S-12
2. Protection by the hardware circuit
The output voltages from TH1 and TH2 (fixing
temperature sensors) are compared with the abnor-
mality judgment reference value in the comparator
circuit. If the output voltage from TH1 or TH2
exceeds the reference value, L2 (fixing heater lamp
1), L3 (fixing heater lamp 2), L4 (fixing heater
lamp 3) and RL1 (main relay) are turned OFF in
hardware means.
CAUTION:
Periodically check the TH2 face contact-
ing the roller, and replace TH2 if any
abnormality is detected.
Since TH1 (fixing temperature sensor)
face does not contact the roller, check the
distance from the roller and the sensor
orientation if any abnormality is detected.
The RL1 function must not be deactivated
under any circumstances.
3. Protection by TS1 (thermostat/U) and TS2
(thermostat/L)
When the temperature of the fixing roller (upper/
lower) exceeds the specified value, TSs are turned
OFF, thus interrupting the power to L2 (fixing
heater lamp/1), L3 (fixing heater lamp/2), and L4
(fixing heater lamp/3) directly.
CAUTION:
Do not use any other electrical conductor
in place of TS1 and TS2. Do not change
the distance between the roller and TS
(thermostat).
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Konica Minolta 7165 User manual

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Copiers
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User manual
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