HP M750 series

Recommended action
1. Close the door.
2. Use the right-door switch (SP15) test in the Manual sensor test to verify that the switch is properly
functioning. If the switch fails the test, replace the switch.
3. Check the sensor flag on the right door assembly. If it is damaged, replace the door assembly.
4. If the product has been recently serviced, check the connector (J708) on the 24V interlock switch and
the connector (J181) on the DC controller PCA.
Cooling device
Description
The product is cooling.
Customers may report seeing a Cooling Device message displayed on the product control panel and
experience a noticeable decrease in print speed.
This is typically seen during long, continuous print runs (greater than 1,000 pages) and is more common in
high temperature/high humidity environments. When this message is displayed, the product will print for
several seconds and then pause several seconds before printing again. This will continue until the current job
finishes or the job is canceled.
After the product has completed the job, or the user cancels the current job, the product may require several
minutes to cool sufficiently to continue printing at normal print speeds.
Recommended action
No action is necessary.
This is normal behavior for this product and is done to protect the toner cartridges from overheating.
Advise a customer who is experiencing this condition to allow the product to cool down before beginning to
print again.
The customer can avoid this scenario by ensuring the product is in a location that is within the product's
specifications for temperature and humidity and by avoiding long, continuous printing situations by breaking
down print jobs into smaller sections with some delay in between.
Data received To print last page, press OK
Description
The product is waiting for the command to print the last page.
Recommended action
Press the OK button to print the last page of the job.
Event log is empty
Description
No product events are in the log.
468 Chapter 3 Solve problems ENWW