Power Supply; Multifunction Finisher; 3,000-Sheet Stapler/Stacker; 3,000-Sheet Stacker - HP Color LaserJet 9500 Service Manual

Power supply

Multifunction finisher

The multifunction finisher power supply adopts a remote switching system. At power on, the
printer issues a command to the video controller PCB. The video controller PCB then sends a
power-on signal (PWRON-IN signal) to the power supply. When the PWRON-IN signal is at the
high ("H") level, the power-supply circuit supplies +24 V power and +5 V power to the finisher
controller PCB. The +24 V power drives the feed motor, delivery motor, and solenoid. The +5 V
power drives sensors, IC chips, and the finisher controller PCB.
Figure 36. Multifunction finisher power supply

3,000-sheet stapler/stacker

A universal power supply is activated when the MFP or printer power switch is turned on. The
MFP or printer paper-handling controller sends a power-on signal to the power supply through
the controller PCB. The power-supply circuit provides +36 V for motors and +5 V for sensors and
controller electronics. The power supply is also activated when the controller PCA is set to
service mode.

3,000-sheet stacker

A universal power supply is activated when the MFP or printer power switch is turned on. The
MFP or printer paper-handling controller sends a power-on signal to the power supply through
the controller PCB. The power-supply circuit provides +26 V for motors and +5 V for sensors and
controller electronics. The power supply is also activated when the controller PCA is set to
service mode.
74 Theory of operation ENWW