Printer and Photocopier Technology
Dot matrix printer operation
Daisy wheel printer operation
Ink-jet printer operation
A primer on priming
A bit of ink-jet history?
Inkjet types (at least from a Xerox perspective)
Response times of resistance heater elements in ink jet printers
How many colors can an ink-jet printer can produce?
Why are red, blue, and yellow inkjet primaries?
About inkjet printer ink
Laser printer and photocopier operation
Laser printer operation summary
Cleaning and Handling of Photosensitive Drums
Book on laser printer maintenance and rapair
Discussion on laser diodes in laser printers
Types of toner
So you put in the wrong type of toner?

Dot Matrix and Daisy-Wheel Printers
So you took your printer apart....
Print head repair
Ribbon does not advance after replacing flex-cable
Print head stepper
Motor driver blows fuses
Ribbon on electronic typewriter does not advance
Apple Imagewriter II squeal
Compaq Pagemarq 15 printer service mode
Epson FX-286e printer problems
Paper debris clogging Epson LQ-570
IBM X-24 Proprinter print head jumps around
NEC P5200 Printer problem
OKI Microline 391 Elite Problem/Error
Star SD15 printer self-test problem

Ink-Jet Printers
HP DeskJet problems
Types of HP ink-jet technology printers
Dissertation on HP DeskJet repair
HP ThinkJet printer repair 1
HP ThinkJet printer repair 2
HP DeskJet paper feed problems
Cartridges drying out on early HP DeskJets
HP DJ340 shuts off during printing
HP DeskJet 520 - Crunch!
HP DeskJet 560C Detailed problem description and possible solutions
Cartridge detection on HP DeskJets
HP Deskwriter 660 printer problems
Little plastic parts in HP DeskJet printers and HP service policies
HP DeskJet 500 repair notes
HP DeskJet 560C - stripping gear sounds and more
HP600C DeskJet produces too much black ink
HP DJ power supplies/wall adapters
HP 600 series DeskJet printer smears even with new cartridge
HP DeskJet 692C - Random lockups
HP 820Cxi DeskJet Problems
HP DeskJet 1200C power supply repair story
HP PaintJet problems
Unclogging non-HP inkjet printers
Intermittent light/no print from Canon BJ330
Canon BubbleJet information
Cleaning Canon BubbleJet printheads
Canon BubbleJet printers not printing after cleaning
Canon BJC 600 problems
BJC 600 print head error - lights flashing
Epson Stylus Color IIS error light problems
Cleaning Epson inkjet print heads
Cleaning totally clogged colour head in Epson Stylus Color 500
Epson Stylus 800 print quality
Epson Stylus Color 800 printer seems to operate but no printing
Epson Stylus Color 800 clogged print head
Non-use and refill of BJC-620 ink cartridges
Inkjet Printer Cartridge Type and Reliability
Ink cartridge expiration dates
Dead Cannon, Compaq, HP, and similar power supplies

Laser Printers
On-line laser printer resources
Warnings about vacuuming laser printer toner
Refilling toner cartridges
Cleaning laser printer optical path
Cleaning caked-on toner from printer and copier fuser rollersLaser printer drum damaged by extended exposure to light?
Repeating images on laser printer
Black evenly spaced lines on laser printer or copier
Optics disassembly?
HP LaserJet FAQ
Guide to disassembly and reassembly of HP LaserJet II and III
Guide to disassembly and reassembly of HP LaserJet 4
Testing the erase lamps on an HP LaserJets
HP LaserJet error code 51
HP LaserJet I fuser swapping and other tidbits
HP LJ Series II bad bearing noise and other comments
HP LaserJet II just dies and no sign of power after a short while
HP LaserJet II with dark bands on first page
HP LaserJet II output jam
HP LaserJet IIp won't go past 'warm up'
Totally blank printout on laser printer or copier
Bearing replacement on HP LaserJet II to fix error code 41
HP LaserJet series II - error code 50 Service and clicking
Notes on HP LaserJet II error code 50
HP LaserJet II - Top of the line printing shifting in multipage printing
HP LaserJet II bad bearing sounds
HP LaserJet II fuser overheating
HP LaserJet II triac replacement
HP LaserJet Series II intermittent
HP LaserJet IIP printer error code 12
HP LaserJet IIP with 12 Open or no EP error
HP LaserJet IID Error 13
HP LaserJet IIP and LaserJet series 2 error code 52
HP LaserJet II scanner information
HP LaserJet IIP error code 51
HP IID error code 50
HP LaserJet IIP+ error code 50
HP LaserJet IIP - 52 error
HP Laserjet IIP error 52 - chip replacement
Laserjet IIP PS board
HP LaserJet III problems
Smudged vertical line on HP Laserjet III
Shifted print on HP LaserJet III
HP LaserJet III powers on but appears dead
HP LaserJet III cold fuser
HP LaserJet III paper jam
HP LaserJet III paper feed problem
HP LaserJet III error 50
Notes on HP LaserJet III error code 50
Paper jams on HP LaserJet IIIP
HP LaserJet IIIP power up problems
HP LaserJet IIIP - error code 52
Replacement for top output roller on HP LaserJet IIIP
HPLaser Jet IIIsi - 'User Maintenance' message?
HP LaserJet 4 - intermittent error code 50
HP LaserJet 5L grabbing more than one sheet of paper
More on HP LaserJet 5L paper feed problems
HP LaserJet 5 SIMM codes
HP LaserJet random behavior - no ground
Determining if HP LaserJet partial print problems are scanning or logic
LaserJet IIID and others: paper not picked up correctly
Laserwriter LS
Apple technical information
Apple Lserwriter I/O
Apple LaserWriter and LaserWriter Plus paper jams
Apple LaserWriter prints double/repeated images
Apple LaserWriter IIg runaway scanner never stops
Apple Laserwriter IINT error codes
Apple Laserwriter IINT 'clicks' with intermittent fuser error
Diagnosing a blank vertical strip problem on Apple Laserwriter IINT
Upgrading Apple LaserWriter to LaserWriter Plus
Toner All Over Paper on Various Brother Laser Printers
Resetting "REPL.DRUM" error on Sharp JX-9460
TI MicroLaser Plus laser printer reports 'Main Motor Err'
Fuser problem/printer parts
Swapping fuser parts
Panasonic KX-P4410 CHNG DRUM error code 027
Panasonic 4420 laser printer error code E31 and other comments
Copy counter fuses
Laser Printer info
Strange running time meter/copy counter
Laser Printer prints heavy on one line about 2 inches from bottom
Image tilted/skewed/crooked on old IBM laser printer
Fuser Roller collects toner on laser printer
HP original laser printer 2686A: bargain or boat anchor?
Okidata printer that's streaking
First page smudges on OKI OL400
Resetting 'Replace Drum' message on OKI OL400
Laser printer test equipment
Frank's repair notes: HP-IIP, HP-IIIP, Apple Personal Laser Writer
Tony's entry into laser printer repair
Repairing plastic paper feed strip in Canon PC10, etc. or CX laserprinters

Photocopiers
Warnings about vacuuming copier toner
Comments on copy problems
General image quality problems - Clean the optics first!!
Diagnosing 'blank copy' problems
Copies too dark 1
Copies too dark 2
Copies too light
Previous copy doesn't erase from drum
Copy quality degrades with use
Copier error codes
Canon PC25 copier problems
The mysteries of developer
Problems with Ricoh copier
Toner sensors?
Comments on copier cleanliness
Gray tinge on Xerox 5260 Copier
Streaky copies
Toshiba parts
Canon PC20 cold fuser
Broken Sharp Copier
Resetting Sharp Z-25 copy count
Sharp SF-71 copier will not reset
Sharp SF-7100 copier drum replacement

General Problems
Panasonic 1124 power supply problem
Cannon LBP-8 A1 Printer 40 and 22 errors

Fax Machines and Scanners
Fax/scanner striping
Brother Fax machine feed problems and cleaning
Brother IntelliFax 950M transmits black messy lines
Hewlet Packard LaserJet FAX (HP C1740A)
Paper sense problems with Brother Fax

Miscellaneous Problems and Procedures
Cleaning the fuser roller
Streaks on laser printer output
HP plotter communications problems
Okidata FAX machine - Printer Alarm 4

Unresolved Problems
Packard Bell laser printer - strange bug

Service Information
Printer, copier, and fax Web sites
USENET newsgroups
Copier forums
HP LaserJet parts
Laser printer cartridge rebuild info
Printer parts
HP DeskJet Parts
LaserJet II: Where is the fuse?
LaserJet III: Where is the fuse?
Copier and laser printer manuals
Canon information
Epson printer switch settings
Hewlett Packard information
Printer schematics?
References