HP CM8060 Color MFP Kundendienst Handbuch Seite 1285

A1.02C3: Tray 2, 3, and 4 Humidity sensor (SN42)
Initial Steps
1. Check the wire harness between the Tray 2, 3, and 4 Humidity sensor (SN42) and the Trays 2, 3, and 4 Controller PCA (A23). Verify
that the sensor is free of obstructions.
HINWEIS: If the MFP runs slowly, there might be a problem with SN42.
Check the humidity reading
1. Check the humidity reading.
TIPP: Click Subsystems, click Input Trays, and then click Trays 2, 3, 4.
Is the humidity reading between 5 and 95 per cent humidity?
No Yes
Cover the Tray 2, 3, and 4 Humidity sensor (SN42)
1. Cover SN42 and check the humidity reading.
HINWEIS:
„Trays 2, 3, and 4 component locator" auf Seite 2370
TIPP: Click Subsystems, click Input Trays, and then click Trays 2, 3, 4.
1 Did the humidity reading change?
1 No Yes
Check the following conditions
1. Verify that the Tray 2, 3, and 4 Humidity sensor (SN42) is clean and has no obstructions.
1 2 2. Check the electrical connections and wiring between SN42 and the Trays 2, 3, and 4 Controller PCA (A23).
Check the 5, 24, and 32 Vdc LEDs on the Trays 2, 3, and 4 Controller PCA (A23)
1. Verify that the LEDs are lit.
„Trays 2, 3, and 4 controller PCA diagram" auf Seite 2298
1 Are the 5, 24, and 32 Vdc LEDs illuminated?
1 No Yes
Test the voltage to Tray 2, 3, and 4 Humidity sensor (SN42) on the Trays 2, 3, and 4 Controller PCA (A23)
1. Disconnect J5 from A23.
2. Test the voltage to SN42 on A23: 5 Vdc at J5 pins 1 to 4 (GND).
„Trays 2, 3, and 4 assembly wiring diagram" auf Seite 2296
VORSICHT!
1 2
Is the voltage correct?
1 2 No
DEWW
The humidity reading should change quickly.
Use an ESD strap.
Yes
A1.02C3: Tray 2, 3, and 4 Humidity sensor (SN42) 1219