Hook switch control ......................................................................................... 101
Ring detect ...................................................................................................... 102
Line current control ......................................................................................... 102
Billing- (metering-) tone filters ......................................................................... 102
Fax page storage in flash memory .................................................................................. 102
Stored fax pages ............................................................................................. 102
Advantages of flash memory storage ............................................................. 102
6 Removal and replacement
Removal and replacement strategy ................................................................................................. 106
General cautions during removal and replacement ......................................................... 106
Electrostatic discharge ..................................................................................................... 106
Required tools ................................................................................................................. 107
Types of screws ............................................................................................................... 107
Service approach ............................................................................................................................. 108
Before performing service ................................................................................................ 108
After performing service ................................................................................................... 108
Post-service tests ............................................................................................................ 109
Test 1 (print-quality test) ................................................................................. 109
Test 2 (copy-quality test) ................................................................................. 109
Test 3 (fax-quality test) .................................................................................... 109
Parts removal order ......................................................................................................... 110
Print cartridges ................................................................................................................................. 111
Control-panel overlay (base model) ................................................................................................. 112
Control panel (base model) .............................................................................................................. 113
Control-panel bezel (fax/memory-card models) ............................................................................... 115
Control panel (fax/memory-card models) ......................................................................................... 116
Reinstall the control panel (fax/memory-card models) .................................................... 116
Paper-feed assemblies ..................................................................................................................... 118
Pickup roller (product base) ............................................................................................. 118
ADF pickup roller assembly ............................................................................................. 119
Separation roller (product base) ...................................................................................... 120
Transfer roller .................................................................................................................. 122
Paper-guide assembly ..................................................................................................... 124
External panels, covers, and doors .................................................................................................. 125
Front door and front-lower cover ..................................................................................... 125
Right cover ....................................................................................................................... 132
Left cover ......................................................................................................................... 135
Front-right cover .............................................................................................................. 137
Reinstall the front-right cover .......................................................................... 138
Memory-card reader PCA (fax/memory-card models only) ............................................. 139
Card cover or blanking cover ........................................................................................... 140
Rear-side cover ............................................................................................................... 142
ENWW vii
