HP CM8060 Color MFP Kundendienst Handbuch Seite 1477

C2.0C01: Dryer heater (HTR1) problem
Initial Steps
1. „Dryer component locator" auf Seite 2359
VORSICHT! There is high AC (110/220) voltage when measuring dryer coil voltage with power applied.
Check the constant wattage
1. Check the constant wattage reading.
TIPP: Click Subsystems, and then click Dryer.
Is the constant wattage 300 watts?
No Yes
Intermittent connection
1. Check the electrical connections and wiring between the dryer and the Main Engine PCA (A5) for an intermittent connection.
1 „Dryer wiring diagram" auf Seite 2267
Measure the resistance of the four dryer coils on W22P1-PS1
1. Disconnect W22P1-PS1 on the Power supply (PS1).
„Dryer component locator" auf Seite 2359
„Dryer wiring diagram" auf Seite 2267
2. Measure the resistance on W22P1-PS1 pins 1 to 2, 2 to 3, 4 to 5, and 5 to 6.
The resistance should be approximately 28 (+/- .5) ohms between each set of pins.
Is the resistance 28 (+/- .5) ohms on each coil?
No Yes
Verify that the connectors and boards are correctly seated
1. Reconnect W22P1-PS1.
2. Verify that J4 and J5 on the Power Distribution PCA (A1), J9 on the Main Engine Backplane PCA (A4), and the Main Engine
PCA (A5) are securely seated.
1 Are J4, J5, J9, and the A5 securely seated?
1 No Yes
Measure the two dryer signals
1. Measure the two dryer signals from the Main Engine PCA (A5) to J5 on the Power Distribution PCA (A1).
„Dryer wiring diagram" auf Seite 2267
2. Disconnect J5 from A1.
HINWEIS:
Dryer Temperature sensor (SN36) sends a signal to A5 requesting the Power supply (PS1) to turn on the dryer coils.
The dryer signal voltage can be intermittent.
Does the voltage measure approximately 3.3 Vdc between pins B14 to B15 (GND) and A1 to A2 (GND) on the wire
1 2 harness from A5?
1 2 No
DEWW
The signal voltage availability is based on the dryer coil temperature. When the dryer cools down, the
Yes
C2.0C01: Dryer heater (HTR1) problem 1411