found this on HP CSN site
59.F0 ErrorDescription
A 59.F0 error message is displayed on control panel when the product boots up or intermittently happens during printing.
This behavior is primarily caused by a stuck sensor flag (SR9 at connector J19). The flag sticks in the sensor holder due to contamination (toner, paper dust, etc.). This can also be the fuser drive assembly not functioning correctly.
Recommended action
- Have the customer reseat the ITB.
- If the issue persists, send an onsite technician with the Position Detect Assembly (which includes the SR9 Sensor Assembly) and the below instructions.
Position Detect Assembly (includes the SR9 Sensor Assembly) |
HP Part #: RM1-5500-000CN |
ONSITE TECHNICIAN
- Remove the ITB and manually test the primary transfer-roller-disengagement sensor flag, SR9.
- Locate Sensor SR9 inside the ITB cavity.
Figure : Primary transfer-roller-disengagement sensor SR9 (Sensor flag in ITB cavity of printer)
- From the control panel, press the Home button, press the down arrow to Administration -> Troubleshooting -> Diagnostic Tests menu.
- From inside the ITB cavity, press up and then release the SR9 flag to actuate the sensor.
Figure : Manually activating Flag to actuate Sensor SR9
- While pressing and releasing the flag, check the control panel display for sensor response (SR9 ITB Alienation) and confirm that the sensor toggles Green and shows the count increasing (0 is the normal state).
- If the value does not increase or show on and off, replace the SR9 sensor which is part of the Position Detect Assembly. (HP Part #: RM1-5500-000CN).
note:
Also observe the speed at which the sensor returns back to its original state. Slow sensors need to be replaced as well. If there is any doubt, replace the sensor. (The SR9 sensor is part of the Position Detect Assembly.)
- If the issue persists, perform an ITB Contact/ Alienation Test:
- Defeat the right door safety switch (upper left area) by inserting a stiff/folded piece of paper and then defeat right door logic switch (right side below fuser) by use masking tape to hold switch down.
- From the control panel, press the Home button, press the down arrow to Administration -> Troubleshooting -> Diagnostic Tests menu.
- During the test, observe the alienation drive hub located above the cyan cartridge.
- If the test fails or the alienation drive hub does not rotate, replace the Fuser-Drive Assembly (HP Part #: RM1-5656-000CN).
- If the issue persists, replace the DC Controller.
- Check the connections to primary transfer-roller-disengagement sensor (SR9 at connector J19) and to the DC controller PCA (connector J128) when replacing components.
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