HP MFP M2727 manual Removal and replacement, Solve problems

5 Removal and replacement
Introduction	94
Removal and replacement strategy	94
Electrostatic discharge	94
User-replaceable parts	94
Required tools	95
Before performing service	95
After performing service	96
Post-service tests	96
Test 1 (print-quality test)	96
Test 2 (copy-quality test)	96
Test 3 (fax-quality test)	97
Parts removal order	98
Remove the print cartridge	99
External panels, covers, and doors	100
Right cover	100
Left cover	102
Print-cartridge door	104
Rear cover	106
Top cover	108
Replace the ADF pickup-roller assembly	110
ADF scanner glass	113
ADF assembly	115
Scanner/ADF assembly	117
Bezel and control panel	119
Internal assemblies	122
Convenience-stapler assembly (HP LaserJet M2727nfs only)	122
Convenience-stapler power supply (HP LaserJet M2727nfs only)	124
Convenience-stapler AC inlet cable (HP LaserJet M2727nfs only)	126
Convenience-stapler power supply bracket and strap (HP LaserJet M2727nfs only)	127
Speaker	128
Power-switch PCA	130
Formatter	132
Duplex assembly	135
Laser/scanner (print engine)	137
Memory-tag-reader assembly (E-label reader)	139
Fan	141
Duplex-drive gears	143
Duplex solenoid	145
Fuser	147
Interlock assembly	152
Engine controller assembly (ECU)	153
Main motor	158
Pickup-and-feed assemblies	160
Transfer roller	160
Registration-roller assembly	161
Main gear assembly and tray 2 pickup solenoid	162
6 Solve problems
Problem-solving checklist	166

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