HP LaserJet Companion Service Manual
Service Manual
HP LaserJet Companion
Printer Accessory
(C3989A) Companion
(C3079A) Companion SE
(C4106A) Companion XI
Copyright Information
© 1997 Hewlett-Packard Company
All Rights Reserved.
Reproduction, adaptation, or
translation withoutprior written
permission is prohibited, except
as allowed under thecopyright
laws.
Part number: C3989-90945
First Edition, March 1997
Warranty
The information contained in this
document is subject to change
without notice.
Hewlett-Packard makes no
warranty of any kind with regard
to this material, including, but not
limited to, the implied warranties
of merchantability and fitness for
a particular purpose.
Hewlett-Packard shall not be
liable for errors contained herein
or for incidental or consequential
damages in connection with the
furnishing, performance, or use of
this material.
WARNING
Electrical Shock Hazard
To avoid electrical shock, use only
supplied power cords and
connect only to properly
grounded (3-hole) wall outlets.
Trademark Credits
Microsoft®
U.S.registered trademarks of
Microsoft Corporation. PaperPort
is a trademark of
the United States and other
countries.
and
registered trademarks of the
Caere Corporation.
and
Windows®
Visioneer, Inc.
OmniPage Professional
OmniPage Lite
are
are U.S.
in
Contents
1 Product Information
Product Description ..........................1-1
System Requirements .......................1-1
Product Features ..........................1-2
Product Specifications .........................1-3
2Functional Overview
Operation and Timing .........................2-1
Optical System ...........................2-1
Document-Feed System ......................2-2
Control Buttons ............................2-3
Software ...............................2-4
Installation Software ........................2-4
The PaperPort Software ......................2-4
3Testing
Performing Main Tests .........................3-1
System Requirements .......................3-1
Initializing the NVRAM .......................3-1
Calibrating the Companion .....................3-1
Copying to the Printer .......................3-2
Scanning to the Computer .....................3-2
Performing Additional Tests ......................3-3
Cleaning the HP LaserJet Companion Printer Accessory .......3-4
4Troubleshooting
Basic Troubleshooting .........................4-1
Power On ..............................4-2
Paper Movement ..........................4-4
Image Transfer Failures ......................4-6
Image Quality Problems ......................4-6
5Removal and Replacement
Disassembly and Reassembly ....................5-1
Required Tools ...........................5-1
Disassembly ..............................5-2
Reassembly ..............................5-6
6Parts
Ordering Parts .............................6-1
Documentation Part Numbers ...................6-1
Upper Cover Assembly .......................6-3
External Covers and Panels ....................6-5
Internal Components ........................6-7
Cables ..............................6-10
Power Supply Modules ......................6-10
EN Contents-1
A Parts Index
List of Figures
Figure 4-1, Voltage Test Points ....................4-2
Figure 5-1, Gear Locations ......................5-8
Figure 5-1, Image Sensor Connector WireRouting .........5-9
Figure 6-1, Upper Cover Assembly ..................6-2
Figure 6-2, External Covers and Panels ...............6-4
Figure 6-3, Internal Components ...................6-6
Contents-2 EN
Product Information
Product Description
The HP LaserJet Companion Printer Accessory expands the capabilities
of an HP LaserJet printer.Users can scan a variety of documents with
the scanned quality very close to the original document. A letter- or A4sized page scans in approximately ten seconds.
The Companion is used to copy, fax, file, and read scanned documents
using the Companion software, the PaperPort™ software for
Hewlett-Packard, and optical character recognition (OCR) software.
System Requirements
The minimum system requirements are:
• IBM or compatible computer with a 486 central processing unit (CPU) or
faster
• 8 megabytes (MB) or more of random-access memory (RAM)
• Bidirectional or ECP-compliant parallel port
• 8 MB of free hard disk space
• Video graphics adapter (VGA) or better monitor
• Microsoft® Windows® 3.1, Windows 3.11, or Windows 95
• HP LaserJet 4-, 5-, or 6-series printer
• Bidirectional parallel cable (IEEE-1284 compliant)
1
EN Product Information 1-1
Product Features
Hardware
Speed Approximately 10 seconds per typical page*
Resolution 300 by 300 dots per inch (dpi) optical
256 levels of gray (8 bit)
Technology Sheetfeed,grayscale, single pass
Interfaces Two high-speed bidirectional parallel ports (A-type
connector) Companion is a parallel port pass-through device
between the computer and the HP LaserJet printer
Control Panel Icon-based control panel includes two buttons: one button
sends the image to the printer (even if the computer is off)
and the other button sends the image to the computer
Included Cable One parallel interface cable connecting the Companion to
the computer
Product Certifications UL and CUL listed; complies with IEC 825-1/EN 60825-1
and IEC 950/EN 60950;FCC Class B certified; CISPR-22
Class B
Warranty One-year warranty (Express Exchange** or Repair and
Return)
Software
OLE/TWAIN Support Supports OLE 2.0 and TWAIN standards
Included Software
Companion XI PaperPort software, Companion Copier software, OmniPage
Limited Edition OCR software
Companion SE PaperPort software, Companion Copier software; OmniPage
Lite Edition OCR
* Scan time only, data transfer time to CPU not included
** Express Exchange is available in the United States and Canada only
Note
1-2 Product Information EN
Information in this manual is subject to change upon product
improvement.
Product Specifications
Performance Specifications
I/O Port Speed Companion to computer (with 166 mHz processor): 90 to 110
kilobytes per second (Kbps)
Companion to HP LaserJet 5P Printer: 100 to 110 Kbps
(approximately 9.5 seconds per page)
1
Information
Product
Approximate Scan Speed
(166 mHz)
Monthly Usage (Duty Cycle) 400 scans per month
1 bit / 150 dpi – 11 seconds per page (spp)
1 bit / 300 dpi – 16 spp
4 bit / 300 dpi – 42 spp
8 bit / 300 dpi – 83 spp
Electrical Specifications
Power Consumption 4 watts (W) (standby); 17 W (operating)
Available AC Adapter Inputs 120 to 127 V (+6% to -10%), 60 Hz (± 2 Hz)
220 V (+6% to -10%), 50 to 60 Hz (± 2 Hz)
230 V (+6% to -10%), 50 to 60 Hz (± 2 Hz)
240 V (+6% to -10%), 50 to 60 Hz (± 2 Hz)
AC Adapter Output 18 Volts direct current (Vdc), 730 milliamperes (mA)
Environmental Specifications
Operating Environment Temperature: 10° to 40° C (50° to 104° F)
Humidity:15% to 80% Relative Humidity (RH)
Storage Environment 0°to 60° C (32° to 140° F)
10% to 90% RH
Acoustic Emissions 6.1 bels (B)
Size Specifications
Dimensions (H by W by D) 149 by 316 by 92 mm
(5.875 by 12.5 by 3.625 inch)
Weight 1.36 kg (3.0 lb) includes power supply
1.2 kg (2.6 lb) without power supply
EN Product Information 1-3
Media Specifications
Media Handling Multiple-page Automatic Document Feeder – capacity varies
from 10 to 15 pages depending upon paper
thickness
“Fold-up”arms for paper support
Center-justified paper guides for paper alignment
Media Sizes Maximum:216 mm x 762 mm (8.5 by 30 inch)
Minimum:51 mm x 89 mm (2 by 3.5 inch)
Media Weights 60 to 105 g/m2(16 lb to 28 lb)
Skew Maximum skew no greater than 3.35 mm (.13 inches) over
279 mm (11 inches)
Cable Specifications (see page 6-9 for part numbers)
Companion to computer Bidirectional IEEE-1284 compliant cable (shipped with
Companion)
Companion to HP LaserJet
Printer
Bidirectional parallel cable:
A-B type, no more than 2 meters in length
A-C type, no more than 3 meters in length (HP
LaserJet 5P or 6P printer only)
1-4 Product Information EN
Functional Overview
Operation and Timing
Optical System
A contact sensor unit is used for the optical system. When the optical
system is operating, the light-emitting diode (LED) array emits light to
the document and the photo transistors detect the light reflected from
the document.
Document Scanning Function
• The image sensor scans documents of up to letter size width (8.5
inches or 215.9 millimeters) at the horizontal scanning resolution of 300
dpi.
• The vertical scanning resolution is 300 dpi.
• The image sensor is a dust-free structure that prevents dust from
accumulating on the photo transistors’ surfaces. The light emitted by the
LED array goes through the glass and is reflected by the document.
This reflected light is then converted to electrical signals by the photo
transistors in the sensor unit. This method requires no lens.
2
Structure of the Image Sensor
The image sensor consists of the following:
• The LED array emits the scanning light. The LED array consists of 36
LEDs and is controlled by the control system.
• The glass is in contact with the document.
• The photo transistor array receives the reflected light. The photo
transistor array consists of 2,574 photo transistors and 11 driver circuits.
Each driver circuit amplifies the output of 234 photo transistors. The
output from the 11 driver circuits is converted to the serial data and sent
to the control unit.
• The guide film prevents the document from becoming jammed.
EN Functional Overview 2-1
Document-Feed System
Although this unit does not have a sensor that detects whether or not a
document is in the document feed tray, it has a document-feed sensor
that detects the leading and trailing edges of the paper.
The document-feed system does not have a document-feed solenoid.
Rather, at the moment the main motor rotates, the pickup roller also
rotates and a document is fed to the inside of the unit. The document
inside the unit is then fed to the delivery slot by the scan roller after
being scanned.The scan roller rotation speed is four times the rotation
speed of the pickup roller.
2-2 Functional Overview EN
Control Buttons
The HP LaserJet Companion Printer Accessory has two control buttons
located on the top right-hand side of the unit:
• To PC (light gray, on the left)
• To Printer (dark gray, on the right)
Note
To stop a scan, press either [To[PC] or [To[Printer] once.
Use [To[Printer] to print single copies
1 Raise the paper tray and paper supports.
2 Place a document in the paper tray, face up and top down, and adjust
the paper edge guides.
3 Press [To[Printer].The document is fed through the Companion and the
printer prints a copy.
Use [To[PC] to send images to the Companion
Copier software
1 Raise the paper tray and paper supports.
2 Place a document in the paper tray, face up and top down, and adjust
the paper edge guides.
3 Press [To[PC] once.The image is sent to the computer where the
PaperPort software starts automatically.
2
Overview
Functional
EN Functional Overview 2-3
Software
Installation Software
The Companion installation software installs the scanner drivers and the
PaperPort software on the computer’s hard disk. The software can be
installed from either a disk or a compact disc.
The PaperPort Software
The PaperPort software offers the following features:
• Annotate, organize, and find scanned items.
• Electronically link scanned documents to other applications such as fax,
e-mail, and word processing applications.
• Unless specified otherwise, the PaperPort software is the default inbox
for receiving scanned documents at the computer.
2-4 Functional Overview EN
Testing
3
Performing Main Tests
Final tests use the PaperPort software shipped with the HP LaserJet
Companion Printer Accessory.
Tests may be performed only when the scan roller and the image sensor
are clean.To clean the scan roller and image sensor, follow the
directions under “Cleaning the HP LaserJet Companion Printer
Accessory” later in this chapter.
System Requirements
Connect the Companion to a computer and an HP LaserJet printer that
meet the system requirements described in Chapter 1.
Initializing Nonvolatile Random-Access
Memory (NVRAM)
NVRAM should be initialized before performing other tests. NVRAM
initialization ensures that the internal memory is in the default mode.
1 Disconnect the power supply from the Companion.
2 Press and hold down [To[Printer] while reconnecting the power supply.
The motor will rotate briefly.
3 Release [To[Printer] when the motor stops.The motor will again rotate
briefly.
Initialization is complete when the motor stops again.
EN Testing 3-1
Calibrating the Companion
Calibrate the Companion so that the image sensor and control board
become a matched set that produces quality scanned images.
1 Click Settings on the PaperPort software desktop.
2 Click More.
3 Click Calibrate.
4 Insert a blank sheet of white paper that is 8.6 inches (218 millimeters)
wide by at least 6 inches (15.2 millimeters) long into the Companion.
5 Click OK.
Calibration is complete.
Copying to the Printer
Multi-feed Test
The document-feed system should accept 10 to 20 pages, feeding them
through the Companion one at a time.
1 Raise the paper tray and paper supports and place approximately ten
pages in the paper tray.
2 Press To]Printer .
Skew Test
The document-feed system should feed pages through the Companion
smoothly and evenly.
1 Place a document containing printed grid lines in the paper tray.
2 Press To]Printer .
3 Measure the grid lines on the resulting copy for skew.
4 Repeat steps 1 through 3 several times to determine whether or not
skew is consistent.
Note
Also see skew troubleshooting on page 4-5.
Scanning to the Computer
Use Settings in the software to select a scanning mode that simulates
the user’s problem.
• Use Photograph Mode or Custom Mode for graphics and photographs.
• Use OCR Mode or Fax Test Mode for OCR problems.
3-2 Testing EN
Performing Additional Tests
Additional tests may be developed for use at repair sites. New tests will
be available at this Internet address: http://ljtm.boi.com/.
3
Testing
EN Testing 3-3
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