Brother FAX-921 - Manual (Page 32)

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3. CONTROL ELECTRONICS
3.1 Configuration
The hardware configuration of the facsimile equipment is shown below.
*1 On the main PCB are these sensors:
l Ribbon sensor (PI1)
l Document rear sensor (PI2)
l Cover sensor (SW1)
*2 On the front document sensor PCB is the front document
sensor.
*3 On the sensor PCB are these sensors:
l Paper-edge sensor (PH1)
l Paper ejection sensor (PH2)
*4 On the hook switch PCB* is the hook switch sensor (SW1).
* Not provided on the FAX-910.
Configuration of Facsimile Equipment