Editing Apple LaserWriter II NT (section)

== Common Issues and Maintenance ==

=== Known Problems ===

{| class="wikitable" style="width:90%; text-align:center;"
|+'''Common IINT Failures'''
! Component !! Symptoms !! Cause !! Repair
|-
| DC controller || No power, random resets || Capacitor failure || Recap board
|-
| Logic board || PostScript errors || RAM failure || Replace RAM (requires desoldering)
|-
| Power supply || Voltage instability || Aged capacitors || Replace all electrolytics
|-
| Fuser assembly || Poor adhesion, wrinkled pages || Worn roller || Replace fuser unit
|-
| Corona wires || Light print, streaking || Contamination || Clean or replace
|-
| Paper feed || Multiple feeds, jams || Worn rollers || Clean/replace rollers
|}

=== Capacitor Issues ===
The IINT logic board was prone to capacitor failure:
* Surface-mount capacitors leak over time
* Causes intermittent operation or failure
* All capacitors should be replaced preventively
* Use 105°C rated replacements

=== Preventive Maintenance ===

'''Service Intervals:'''
* '''Monthly:''' Clean corona wires with brush
* '''50,000 pages:''' General cleaning and inspection
* '''100,000 pages:''' Replace transfer corona assembly
* '''200,000 pages:''' Replace fuser assembly
* '''300,000 pages:''' Major overhaul recommended

'''Regular Cleaning:'''
* Toner vacuum with appropriate filter
* Paper path cleaning with lint-free cloth
* Corona wire cleaning with supplied brush
* Exterior wipe with damp cloth

=== Memory Issues ===
The 2 MB fixed RAM configuration limitations:
* Cannot be expanded
* Insufficient for very complex documents
* May require document simplification
* Font downloading limited by available memory