Fuser control
The fuser heater control circuit and the fuser heater safety circuit control the fuser temperature according
to commands from the DC controller. The product uses an on-demand fusing method.
Figure 1-8
Fuser components
TH3
TH2
Fuser heater
control circuit
TH4
High-voltage power supply
TH1
TP1
H1/H2
Pressure roller
Fuser film
DC controller
FUSER TEMPERATURE signal
FUSER HEATER CONTROL signal
Fuser heater
safety circuit
The following table shows the function of each fuser component.
Component
Function
H1
Fuser main heater
Heats center area of the fuser film
H2
Fuser sub heater
Heats both ends of the fuser film
TP1
Thermoswitch
Prevents an abnormal temperature rise of the fuser heater (contact type)
TH1
Main thermistor
Detects the temperature at center of the fuser heater (contact type)
16
Chapter 1 Theory of operation
ENWW
Содержание LASERJET ENTERPRISE MFP M725dn
Страница 1: ...LASERJET ENTERPRISE MFP M725 Troubleshooting Manual M725z M725dn M725f M725z ...
Страница 2: ......
Страница 3: ...HP LaserJet Enterprise MFP M725 Troubleshooting Manual ...
Страница 6: ...iv Conventions used in this guide ENWW ...
Страница 32: ...xxx ENWW ...
Страница 142: ...110 Chapter 1 Theory of operation ENWW ...
Страница 442: ...2 Open the upper left door 3 Press the green tab down to open the bar 410 Chapter 2 Solve problems ENWW ...
Страница 457: ...4 Close the fuser jam access cover 5 Close the fuser door ENWW Clear jams 425 ...
Страница 475: ...1 Lift the document feeder latch 2 Open the document feeder cover ENWW Clean the product 443 ...
Страница 512: ... 2009 Hewlett Packard Development Company L P Rev 04 09 480 Appendix A Service and support ENWW ...
Страница 516: ...484 Appendix A Service and support ENWW ...
Страница 545: ......
Страница 546: ... 2013 Hewlett Packard Development Company L P www hp com CF066 91023 CF066 91023 CF066 91023 ...