HP M750 series

Table 3-24 Component tests (1 of 2) (continued)
Component test Component tested Comments
ITB Contact/Alienation Motor M4 (fuser motor)
SL5 (disengagement solenoid)
Drives the fuser motor M4
(drives the motor four times)
and the T1 roller disengagement
solenoid SL5, and brings the T1
roller to either one of the
following states:
●
4 rollers are disengaged
(home position)
●
Only K T1 roller is engaged
or 4 rollers are engaged
If home position of the T1 roller
is not commanded within 10
seconds, the printer moves the
T1 roller to its home position.
Additionally, the printer keeps
the state of 4 rollers
engagement so that the service
technician can access and
manually clean the dust-proof
glass (open the front door and
remove the cartridge).
Fuser Contact/Alienation Drive M4 (fuser motor) Reverses the fuser motor to
rotate the fuser pressure release
cam and pressurize or
depressurize the pressure roller.
If home position of the pressure
roller is not commanded within 5
seconds, the printer brings the
pressure roller to its home
position.
Tray<X> Pickup Motor M5 (pickup motor)
M1 (Tray 3 pickup motor)
M1 (Tray 4 pickup motor)
M81 (Tray 5 pickup motor)
M91 (Tray 6 pickup motor)
Drives the pickup motor M5, the
500 sheet paper feeder pickup
motor M1, and each of the
3x500 paper deck cassette
pickup motors, cassette 1 M1,
cassette 2 M81, and cassette 3
M91 individually at a specified
speed for 5 seconds.
DuplexerPickup Motor M8 (duplex pickup motor) Drives the duplex feed motor at
a specified speed for 5 seconds.
Switchback Motor M7 (duplex reverse motor) Drives the duplex reverse motor
at a specified speed for 5
seconds.
306 Chapter 3 Solve problems ENWW