●
Primary charging roller
●
Memory tag
Figure 1-21
Toner cartridge components
Cartridge
Photosensitive drum
Memory Tag
Drum motor
Developing roller
Primary
charging
roller
High-voltage power supply
DC controller
The cartridge serves a role in the following functions:
●
Memory tag
The memory tag is a non-volatile memory module in the cartridge and the DC controller controls it.
The memory tag stores information about usage for the cartridge and the DC controller reads and
writes the data in the memory tag. The DC controller determines a memory tag error and notifies
the formatter when it fails to either read from or write to the memory tag.
●
Cartridge-presence detection
The DC controller detects whether the cartridge is installed in the product by monitoring the
cartridge presence sensor. The DC controller notifies the formatter when it determines a cartridge
absence.
●
Toner-level detection
30
Chapter 1 Theory of operation
ENWW
Summary of Contents for LASERJET ENTERPRISE MFP M725dn
Page 1: ...LASERJET ENTERPRISE MFP M725 Troubleshooting Manual M725z M725dn M725f M725z ...
Page 2: ......
Page 3: ...HP LaserJet Enterprise MFP M725 Troubleshooting Manual ...
Page 6: ...iv Conventions used in this guide ENWW ...
Page 32: ...xxx ENWW ...
Page 142: ...110 Chapter 1 Theory of operation ENWW ...
Page 457: ...4 Close the fuser jam access cover 5 Close the fuser door ENWW Clear jams 425 ...
Page 475: ...1 Lift the document feeder latch 2 Open the document feeder cover ENWW Clean the product 443 ...
Page 516: ...484 Appendix A Service and support ENWW ...
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