HP M750 series

Table 3-24 Component tests (1 of 2) (continued)
Component test Component tested Comments
Tray<X> Pickup Solenoid SL2 (Tray 1 pickup solenoid)
SL1 (Tray 2 pickup solenoid)
SL1 (Tray 3 pickup solenoid)
SL1 (Tray 4 pickup solenoid)
SL82 (Tray 5 pickup solenoid)
SL92 (Tray 6 pickup solenoid)
Drives the Tray 1 pickup
solenoid SL2, the Tray 2 cassette
pickup solenoid SL1, the 500
sheet feeder pickup solenoid
SL1, and each of the 3x500
paper deck cassette solenoids,
cassette 1 SL1, cassette 2 SL82,
and cassette 3 SL92, individually
for 5 seconds.
Switchback Flapper Solenoid SL3 (duplex reverse solenoid) Drives the duplex reverse
solenoid for 10 seconds.
Laser Scanner Motor M10 (laser/scanner motor) Drives the laser/scanner motor
at a specified speed for 10
seconds.
Additional component tests
The following tests are not supported in the firmware. These component tests are accomplished by
manipulating or observing the product during operation or when the power is turned on.
Table 3-25 Component tests (2 of 2)
Component test Component tested Comments
Paper Deck Cassette Lifter Motor M9 (Tray 2 lifter drive assembly)
M2 (Tray 3 lifter drive assembly)
M2 (Tray 4 lifter drive assembly)
M82 (Tray 5 lifter drive assembly)
M92 (Tray 6 lifter drive assembly)
Open and then close a paper tray. Listen at
the back side of the product for the sound
of the lift motor for that tray.
If the lift motor does not make a sound
and the paper surface sensor for that tray
passes a sensor test (see Tray/Bin manual
sensor test), replace the lifter drive
assembly.
Power Supply Fan FM1 Turn the product power off, and then on.
Listen at the left-front-lower corner area
of the print engine for fan noise while the
product initializes.
Full/half speed intake fan
Cools the following areas:
●
low-voltage power supply area
●
face-down bin
●
delivery bin
●
laser scanner area
ENWW Tools for troubleshooting 307