Hitachi SL1 User manual

MANUAL NO. :
MAINTENANCE MANUAL
FOR
HITACHI COLOR LASER PRINTER
MODEL SL1
Hitachi, Ltd.
Tokyo, Japan
February, 27 , 1998
Read & Keep This Manual
• Read the safety instructions carefully, and understand the contents before starting the
maintenance Work.
• Keep this manual always available for reference.

No, Date of Revision Revision Code Description of Revision
1 July 14, 1997 First Edition First Edition (Original)
2 October 13, 1997 Revision “A” First revision made and issued as Rev.”A”
3 February 27, 1998 Revision “B” First revision made and issued as Rev.”B”
Revision Control Table

This equipment has been tested and found to comply with the limits for a Class B digital
device pursuant to Part 15 of FCC Rules. These limits are specified to provide the
reasonable protection against harmful interference in a residential installation.
Since this equipment generates, uses, and radiates the radio frequency, it may cause
harmful interference to the radio communications if not installed or used in accordance
with the instructions set out hereunder. However, there is no guarantee that such
interference will not occur in a particular installation.
If this equipment causes harmful interference to the radio or television reception, which
can be checked and confirmed by powering the equipment off and on, the users are
encouraged to correct the interference by taking one or more of the following counter-
measures:
. Reorient or relocate the receiving antenna.
. Give more clearance between the equipment and receiver.
. Connect the equipment into the outlet of other circuit which is different from the
one being used for the receiver.
. Consult the dealer or experienced radio/television technician for help.
FCC Notice
WARNING
Canadian Compliance
This digital apparatus does not exceed the Class B limits for radio noise emissions from
digital apparatus set out in the Radio Interference Regulations of the Canadian
Department of Communications.
"Le presnt appareil numerique n'emet pas de bruits radioelectriques depassant les lim-
ites applicables aux appareils numeriques (de la Class B) prescrites dans le Reglement
sur le brouillage radioelectrique edicte par le ministere des Communications du
Canada."
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Product Safety
Laser Product
SL1 is certified as a Class 1 laser product and complies with DHHS Laser-Radiation
Standards, 21 CFR Chapter 1, Subchapter J.
Caution
Use of controls, adjustments or performances of procedures other than those specified
in this Manual may result in hazardous radiation exposure.
SL1 is provided with the ozone filter in order to reduce exhausted ozone in compliance
with Product Safety Standards. Ozone filter must be replaced with new filter yearly,
otherwise, it may cause strong odor which will likely have ill effects to bronchial tubes.
Therefore, this periodical replacement with new filter must be strictly respected.
HITACHI, LTD. MAKES NO REPRESENTATION OR WARRANTIES OF ANY KIND
WHATSOEVER WITH RESPECT TO THE CONTENTS HEREOF AND SPECIFICALLY
DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR
ANY PARTICULAR PURPOSE.
Ozone Gas
Caution
Documentation Disclaimer
(ii)

SAFETY INSTRUCTIONS
1. Safety Instructions
1.1 Safety Principle
(1). Before starting your operation, read this Manual thoroughly. Especially, read
the safety instructions of this section carefully and understand the contents.
(2). Perform all the operations by following the procedures described in this
Manual. Follow all the cautions and warnings set out in the procedures and
on safety labels affixed on the machine. Failure to do so may result in the
human injuries or equipment damages.
(3). Perform only the procedures explained in this Manual. Refrain from opening
or touching any portions that are not related with your operation.
(4). Repair and replacement of parts should be performed by trained and qualified
persons only. Operator should not attempt to do such repair or replacement
works.
(5). It must be appreciated that above-mentioned cautions and warnings do not
cover everything, because it is impossible to guess or evaluate all the
circumstances beforehand.
1.2 Special Safety Information
(1). Introductory Information
The cautions and warnings are made clear by following the "Safety Alert
Symbol" or "Signal Words" such as DANGER, WARNING and CAUTION.
. Safety Alert Symbol
This is the safety alert symbol. When you find this symbol placed on
your equipments or marked in this Manual, be alert for the potential of
human injuries. Follow the recommended precautions and safety
operation practices.
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(iii)

(1). Introductory Information (..... continue)
. Understanding Signal Words
DANGER is used to indicate the presence of a hazard which will cause
severe human injuries or fatal accident if the warning is ignored.
WARNING is used to indicate the presence of a hazard or unsafe practices
which may cause severe human injuries or fatal accident if the warning is
ignored.
CAUTION is used to indicate the presence of a hazard or unsafe practices
which may cause minor human injuries if the warning is ignored.
CAUTION also calls attention to safety messages in this Manual.
. Follow Safety Instructions
Carefully read all the safety messages set out in this Manual and also in the
safety signs placed on your equipments. In this Manual, the safety
instructions (safety alert symbols and signal words) are bracketed by
rectangular enclosure to call for attention. Keep the safety signs in good
condition without missing or damage. Replace the safety signs if smeared
or damaged. Learn how to operate the equipment and how to use the
control properly. Do not let anyone operate without acknowledging the
instructions. Keep the equipments in proper working condition.
Unauthorized modification to equipments may impair the function & safety,
and affect the life of equipments.
Listed below is the various kind of "WARNING" contained in this Manual.
WARNING
HAZARDOUS VOLTAGE
It may cause serious injuries or fatal accidents. Voltage is now applied
from the power supply of printer. There is the danger of electrical shock if
you touch the active area inside the printer.
Make sure to turn the power supply switch OFF and pull out the plug from
the outlet before starting maintenance work to printer.
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(iv)

. Follow Safety Instructions (.... continue)
HARMFUL OZONE GAS
Inhalation of excessive amount of ozone gas may adversely affect the
respiratory organs.
Ozone Filter is provided to this printer to reduce the exhausted ozone.
This filter must be replaced with new filter periodically in accordance with
the Manual attached to this printer.
Listed below are the various kinds of "CAUTION" contained in this Manual.
HOT SURFACE
Can cause a burn.
Fusing Unit is approx.160 hot , so that perimeter is also very hot.
When you need to change the cleaning pad or remove jammed papers,
wait about 20 minutes after opening up the paper exit unit and confirm the
unit to be well cooled down.
ROTATING PARTS
Be cautioned about the potential danger of various rollers to get your
fingers or hand caught into the machine and cause serious injuries.
Note that the exit roller ejecting printed papers is rotating while printing.
Be careful not to get your hairs, fingers, hands, and sleeve or necktie
caught in the machine while operating the machine.
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WARNING
CAUTION
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(v)

. Follow Safety Instructions (.... continue)
HAZARDOUS POWDER
Toner is fine powder to cause powder explosion if dumped into the fire.
Strictly refrain from dumping toner into the fire for disposal.
Toner is fine powder to cause troubles to eyes and respiratory organs if
inhaled.
Handle carefully toner cartridge, waste toner pack and developing unit not
to spread the toner.
HAZARDOUS POWDER
POWER CORDS & PLUGS
This printer is equipped with 3-wire power cords and 3-pronged plugs
(bi-polar plug with grounding) for the user's safety.
Use these power cords in conjunction with properly grounded electrical
receptacles to avoid an electrical shock.
SAFETY INTERLOCK
Cover and Paper Delivery Unit of this printer have electrical safety interlocks
to turn the power off whenever they are opened. Do not attempt to
circumvent these safety interlocks.
CAUTION
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CAUTION
CAUTION
CAUTION
(vi)

CONTENTS
PREFACE and SAFETY INSTRUCTIONS
1. OUTLINE OF PRODUCT
2. SPECIFICATIONS OF PRODUCT
3. INSTALLATION
4. STRUCTURE OF EACH COMPONENT SYSTEMS
5. PERIODIC MAINTENANCE
6. OPERATION AND ADJUSTMENT OF OPERATOR PANEL
7. REPLACEMENT OF MAINTENANCE PARTS
8. TROBLESHOOTING
9. PARTS LIST

1. Outline of Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
1.1 Name & Function of Each Parts . . . . . . . . . . . . . . . .1-1
1.2 Internal Structure . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
1.3 Description of Operator Panel . . . . . . . . . . . . . . . . .1-4

1. Outline of Product
1.1 Name & Function of Each Parts
Operator Panel Top Cover
Paper Exit Cover
Front Cover
Main Switch
Paper Cassette
Paper Exit Unit
Interface Connector Box
AC Input Inlet
Back Cover(L)
[Back Face]
[Front Face]
1-1

No. Name of Parts Outline of Functions
1 Top Cover To act as an upper enclosure and also a paper tray
for printed papers.
2 Operator Panel To display a status of printer operation and
motion.
3 Front Cover To act as a front enclosure, and to be opened
when replacing a toner cartridge or waste
toner pack.
4 Paper Exit Cover
To exit a printed paper onto a top cover,
acting also as paper tray for printed paper.
To be opened when replacing an OPC belt
cartridge.
5 Main Switch To operate power-on and off of printer.
(Pushing for On/Off operation)
6 AC Input Inlet To connect a power supply cable.
7 Back Cover (L) To act as a rear enclosure, and to be opened when clearing an internal jam or doing a
maintenance work.
8 Interface Connector Box Space where a controller PWB to be installed.
1-2

1.2 Internal Structure
1-3
K
Y
M
C
Fusing Unit
Transfer Unit
Paper Discharger
Transfer Roller
Transfer Drum
Paper Pick Up Roller
Drum Cleaner Belt Cartridge Toner Cartridge
@(K,Y,M,C)
Paper Cassette
Optical Unit
No. Name of Components Outline of Functions
1 Toner Cartridge
2 Belt Cartridge
3 Drum Cleaner
4 Fusing Unit
5 Transfer Unit
6 Transfer Drum
7 Paper Discharger
8 Transfer Roller
9 Paper Cassette
10 Paper Pick Up Roller
11 Optical Unit
To contain the toners (K, Y, M, C) for developing.
Each toner cartridge of K,Y, M, C is independent.
To form images, including the OPC belt.
To clean and collect waste toner adhering to the
transfer drum.
To fuse by heat the toner images on the paper.
To transfer toner images from the transfer drum to
the paper.
To form color images, maintaining the toner
images of OPC belt on the drum.
To emit the corona for separating a paper from
transfer drum.
To transfer the toner image of transfer drum to
a paper.
To feed papers automatically.
To feed papers automatically from the paper
cassette.
To generate a laser beam and scan over the OPC
belt.

1.3 Description of Operator Panel
(1) Standard
‘abcdefghijklmno
PQRSTUVWXOPQRSTU
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MESSAGE ONLINE MEDIA
FREE SIZE CLEAR
SELECT
LCD:16 characters by 2 lines
Message LED
Online LED
Media LED
Online Key
Media Select Key
Free Size LED (Red)
Free Size Key
Clear Key
Select Key
Scroll Key (Left)
Scroll Key (Right)
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Description:
1-4

2. Specifications of Product . . . . . . . . . . . . . . . . . . . . . . . .2-1
2.1 Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
2.2 General Specification . . . . . . . . . . . . . . . . . . . . . . .2-2
2.3 Environmental Condition . . . . . . . . . . . . . . . . . . . . .2-5

2. Specifications of Product
2.1 Rating
WARNING
Use the power supply cord provided as an accessory, or the similar cord
complying with following specification (3-wire power cord with grounding).
Use of the "out of specification" cord may result in the electric shock.
Name of Model Voltage (V) Frequency (Hz) Input Current (A) Power Cord (Piece)
SL1-U 120 50/60 8 1 (Standard)
SL1-E 220 - 240 50/60 4 Not included. *1
SL1-J 100 50/60 10 1 (Standard)
*1: As to SL1-E, customers are requested to purchase and use the power
cord complying with the following specifications.
Figure Name of Model Rating Approval Agency Applicable Area
A H05VV-F3G0.75 250VAC, 6A VDE, OVE, SEMKO, CEBEC, Europe
NEMKO, DEMKO, FIMKO (Continent)
B H05VV-F3-0.75 250VAC, 6A BS UK
Fig.A: Power Cord for Europe
2.5m
Fig.A: Power Cord for Europe
2.5m
2-1
Rating label of SL1-E
Rating label of SL1-U

2.2 General Specification
No. Item Description
1 Printing Method Semiconductor Laser and Electrophotography
Print Speed Cassette Feed and Continuous Print:
a). Monochrome a). 16 sheets per minutes (Letter size)
2 b). 2 (two) Color b). 8 sheets per minutes (Letter size)
c). 3 (three) Color c). 5.3 sheets per minutes (Letter size)
d). 4 (four) Color d). 4 sheets per minutes (Letter size)
3 Warming-Up Time 210 seconds (max.), 180 seconds (Normal)
4 Resolution 600dpi
5 Feeding Method Cassette Feed
6 Cassette Capacity
7 Printable Media
8 Paper Exit System Face Down, 250 sheets (capacity)
9 External Dimension
10 Weight of Printer Approximately 36kg (79 pounds)
Ordinary Paper: 250 sheets, OHP: 50 sheets
Envelope: 30 envelopes, Post Card: 50 cards
500 (W) 490 (D) 388 (H) (unit: mm)
19.7 (W) 19.3 (D) 15.3 (H) (unit: inch)
2-2
Letter, Legal, Executive (A4, B5), OHP, Label,
SPHINX

Table 2-1: Characteristics of Hitachi Paper
Item Description
Basis Weight (g/m2) 82 5
Thickness ( m) 95 6
Smoothness (Bekk) 90 20
(seconds)
Stiffness (Clark) 100 15
Brightness (%) 85 2
Surface Resistance ( ) 1010 1011
Grain Direction Long
Measurement Condition: 17.5 27.0 , 50 70%RH
[Note]: Keep the paper sealed, and do not open the paper bag until using the
papers.
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Table 2-2: Characteristics of Hitachi Recommend Paper, OHP Sheet, and Label
Media
Item Paper
Paper Hammermill Label
Xerox 4024
Laserprint (white) Avery 5260 OHP Sheet SPHINX
Auto Fil #1914
Basis Weight (g/m2) 75 4 90 4 163 7 142 4 90 4
Thickness ( /m) 102 6 105 6 184 7 110 6 125 10
Smoothness(Bekk) 35 4 120 20 20 6 500 100 22 10
Stiffness (Clark) 100 15 90 15 65 15 56 15 70 20
Surface Resistance
109( ) 10 100 10 100 1 100 10 1000
10 1000 1 100
CIE
LAB
L*a*b*
L* 94 2 94 2 93 2
a* 0.4 1 0.5 1 0.2 1
b* 1.6 1 2.2 1 4.5 1
80%
(Transmittance)
Brightness (%) 80 2 85 2 77 3
Grain Direction Long Long Long
82 5
: Printed Side
: Back Side
Measurement Condition: 17.5 27.0 , 50 70%RH
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2-4

2.3 Environmental Condition
(1). Ambient Temperature / Humidity / Altitude:
(a). Under Operation: 10.0 32.5 , 20 80%RH
(See the figure below.) C
100 17.5 20 27 30 32.5 40
Recommended Condition;
17.5 27
50 70%RH
20
60
70
80
40
Ambien Humidity (%RH)
Ambient Temperature ( )
C
C
50
(b). Under No Operation: 5.0 ~ 35.0 , 10 ~ 80%RH
(See the figure below.) C
10020303540
20
60
80
40
Ambient Humidity (%RH)
Ambient Temperature( )
5
30
10
C
2-5