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Apple Personal LaserWriter 300: Difference between revisions

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* '''Amber and red alternating:''' Communication error
* '''Amber and red alternating:''' Communication error


== Personal LaserWriter 300 Specific Troubleshooting ==
== Personal LaserWriter 300 Troubleshooting ==


=== M2001 LED Error Codes ===
=== M2001 LED Error Codes ===
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'''ASIC Controller Service:'''
'''ASIC Controller Service:'''
# '''Visual inspection:'''
# '''Visual inspection:'''
  * Check for bulging capacitors (only 3 electrolytics)
## Check for bulging capacitors (only 3 electrolytics)
  * Look for burnt components near power input
## Look for burnt components near power input
  * Verify ribbon cable connections
## Verify ribbon cable connections
  * Check for corrosion on edge connector
## Check for corrosion on edge connector


# '''Capacitor locations (M2001 board):'''
# '''Capacitor locations (M2001 board):'''
  * C1: 47µF 16V near power input
## C1: 47µF 16V near power input
  * C2: 100µF 10V near ASIC
## C2: 100µF 10V near ASIC
  * C3: 47µF 16V near serial connector
## C3: 47µF 16V near serial connector
  * All should be replaced at 50,000 pages


# '''Cleaning procedure:'''
# '''Cleaning procedure:'''
  * Remove board from printer
## Remove board from printer
  * Clean edge connector with pencil eraser
## Clean edge connector with pencil eraser
  * Apply DeoxIT to serial port pins
## Apply DeoxIT to serial port pins
  * Blow out dust with compressed air
## Blow out dust with compressed air


# '''Compression chip verification:'''
# '''Compression chip verification:'''
  * ASIC marked "Apple 343S0140" or similar
## ASIC marked "Apple 343S0140" or similar
  * No field repair possible
## No field repair possible
  * Failure requires board replacement
## Failure requires board replacement
 
=== Canon LBP-PX Fuser Maintenance ===
=== Canon LBP-PX Fuser Maintenance ===


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# '''Accessing the fuser:'''
# '''Accessing the fuser:'''
  * Remove two screws at rear panel
## Remote plastic facade (4 screws under the toner cover), pull the plastic cover forward and up at the corners.
  * Lift rear cover (face-up output tray)
## Remove two screws at rear panel
  * Release green fuser handles
## Pull straight back (not up)
  * Pull straight back (not up)


# '''Upper roller inspection:'''
# '''Upper roller inspection:'''
  * Should be light tan color
## Should be light tan color
  * No black streaks or gouges
## No black streaks or gouges
  * Slight texture acceptable
## Slight texture acceptable
  * Replace if shiny/glazed
## Replace if shiny/glazed


# '''Lower roller check:'''
# '''Lower roller check:'''
  * Red silicone rubber
## Red silicone rubber
  * Must spring back when pressed
## Must spring back when pressed
  * No flat spots or cuts
## No flat spots or cuts
  * Clean with alcohol only
## Clean with alcohol only


# '''Thermistor cleaning:'''
# '''Thermistor cleaning:'''
  * Small white component touching upper roller
## Small white component touching upper roller
  * Clean with cotton swab
## Clean with cotton swab
  * Use 99% isopropyl alcohol
## Use 99% isopropyl alcohol
  * Critical for temperature control


# '''Exit roller service:'''
# '''Exit roller service:'''
  * Two small rubber rollers
## Two small rubber rollers
  * Check "fingers" for wear
## Check "fingers" for wear
  * Common failure at 75,000 pages
## Common failure at 75,000 pages
  * Can trim worn fingers as temporary fix
## Can trim worn fingers as temporary fix
 
=== Personal LaserWriter 300 Pickup Assembly ===
=== Personal LaserWriter 300 Pickup Assembly ===


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# '''Printer not shared on network:'''
# '''Printer not shared on network:'''
  * Verify "Share this Printer" checked in Chooser
## Verify "Share this Printer" checked in Chooser
  * Check AppleTalk is active
## Check AppleTalk is active
  * Confirm host Mac not sleeping
## Confirm host Mac not sleeping
  * Restart with extensions loaded
## Restart with extensions loaded


# '''Corrupted spool files:'''
# '''Corrupted spool files:'''
  * Delete PrintMonitor Documents folder
## Delete PrintMonitor Documents folder
  * Recreate empty folder
## Recreate empty folder
  * Reset PrintMonitor preferences
## Reset PrintMonitor preferences
  * Limit spool to 10 documents
## Limit spool to 10 documents


# '''Memory errors during sharing:'''
# '''Memory errors during sharing:'''
  * Host needs 4MB RAM minimum
## Host needs 4MB RAM minimum
  * Assign 2MB to PrintMonitor
## Assign 2MB to PrintMonitor
  * Disable virtual memory
## Disable virtual memory
  * Close unnecessary applications
## Close unnecessary applications


# '''Serial port conflicts:'''
# '''Serial port conflicts:'''
  * Check no other serial drivers loaded
## Check no other serial drivers loaded
  * Verify modem not using port
## Verify modem not using port
  * Disable AppleTalk on modem port
## Disable AppleTalk on modem port
  * Use printer port only
## Use printer port only
 
=== 100-Sheet Cassette Maintenance ===
=== 100-Sheet Cassette Maintenance ===


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# '''Lift plate spring'''
# '''Lift plate spring'''
  * Check spring tension
## Check spring tension
  * Should lift paper firmly
## Should lift paper firmly
  * Oil pivots with light machine oil
## Oil pivots with light machine oil
  * Replace spring if stretched
## Replace spring if stretched


# '''Corner separator cleaning'''
# '''Corner separator cleaning'''
  * Remove any paper dust buildup
## Remove any paper dust buildup
  * Check for worn or broken tabs
## Check for worn or broken tabs
  * Sand smooth if roughened
## Sand smooth if roughened
  * Critical for preventing multi-feeds
## Critical for preventing multi-feeds


# '''Size adjustment mechanism'''
# '''Size adjustment mechanism'''
  * Slide backstop to click positions
## Slide backstop to click positions
  * Verify positive engagement
## Verify positive engagement
  * Clean slider tracks
## Clean slider tracks
  * Lubricate with silicone spray
## Lubricate with silicone spray


# '''Paper guide alignment'''
# '''Paper guide alignment'''
  * Guides must be perpendicular
## Guides must be perpendicular
  * Check for warping or damage
## Check for warping or damage
  * Adjust screws if loose
## Adjust screws if loose
  * Replace cassette if bent
## Replace cassette if bent
 
=== Canon LBP-PX Drum Unit Care ===
=== Canon LBP-PX Drum Unit Care ===


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# '''Monthly inspection'''
# '''Monthly inspection'''
  * Open toner shutter carefully
## Open toner shutter carefully
  * Look for scratches or spots
## Look for scratches or spots
  * Check cleaning blade edge
## Check cleaning blade edge
  * Inspect charge roller surface
## Inspect charge roller surface


# '''Corona wire equivalent'''
# '''Corona wire equivalent'''
  * 300 uses charge roller not wire
## 300 uses charge roller not wire
  * Clean roller with dry cloth only
## Clean roller with dry cloth only
  * Never use liquids
## Never use liquids
  * Replace cartridge if damaged
## Replace cartridge if damaged


# '''Toner distribution'''
# '''Toner distribution'''
  * Rock cartridge 5-6 times
## Rock cartridge 5-6 times
  * Side to side, not shaking
## Side to side, not shaking
  * Prevents streaking
## Prevents streaking
  * Extends cartridge life
## Extends cartridge life


# '''Waste toner'''
# '''Waste toner'''
  * No user service possible
## No user service possible
  * Fills at 7.5% coverage rate
## Fills at 7.5% coverage rate
  * Replace when print fades
## Replace when print fades
  * Don't attempt to empty
## Don't attempt to empty
 
=== Environmental Adjustments for 300 ===
=== Environmental Adjustments for 300 ===


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