[Misc] dadf u1 main motor failure

[Jerrygbs]

I have a ir 3245 with a dadf u1 that keeps tearing the rubber mounting bracket loose from the main drive motor. This has happened on two different document feeders on the same machine. The motor is hot to the touch but I didn't have a schematic to see were the voltage is coming from, I was wondering if anyone has seen this problem?

[teckat]

Re: dadf u1 main motor failure

I have a ir 3245 with a dadf u1 that keeps tearing the rubber mounting bracket loose from the main drive motor. This has happened on two different document feeders on the same machine. The motor is hot to the touch but I didn't have a schematic to see were the voltage is coming from, I was wondering if anyone has seen this problem?

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u mean the dampening pad that attaches motor M1 to the Diamond Shaped Plate.

If the dampening pad has become detached from the Motor or the Plate, replace motor M1.




Pickup/feed motor (M1) Feeds documents.
Release motor (M2) Prevents a document from swaying.

Pickup/Feed Motor (M1) Control
The pickup/feed motor (M1) control circuit diagram is shown below. A 2-phase stepping motor is used to feed documents. This circuit mainly performs the following types of control:
- Motor ON/OFF control
- Motor rotation direction control
- Motor speed control
M1.JPG
The pickup/feed motor of the ADF is controlled by the reader controller PCB. The reader controller PCB outputs drive pulses to the pickup/feed motor according to the selected print mode (magnification, operation mode, timing, etc.).
The pickup/feed motor is a stepping motor. Its rotation direction and speed are controlled by changing the order of drive pulses (A, /A, B, /B) and frequency.

This machine is powered via two power supply lines (24 V and 12 V) from the reader controller PCB. The 12 V power is converted to the 5 V power by the DC/ DC converter in the ADF driver PCB.