Maintenance Manual SP 40
Rev. 005
126
Chapter 7
Electromechanical Devices
Sensor Board - To detect loading and skewing of the media. The light emitted by pfhotodiodes on the board is
transmitted by the optical fibres to the phototransistors on the same board.
The two following sensor are able to detect loading paper:
D1 ⇒ Q1
D2 ⇒ Q2
The four following sensor are able to detect skewing:
D3 ⇒ Q3
D4 ⇒ Q4
D5 ⇒ Q5
D6 ⇒ Q6
Fig. 7.11 - Sensor Board and Optical Fibre
P1-1 Katode D3 P1-8 Collectors (all transistors)
P1-2 Katode D1 P1-9 Emitter Q6
P1-3 Katode D4 P1-10 Emitter Q5
P1-4 Katode D5 P1-11 Emitter Q2
P1-5 Katode D2 P112 Emitter Q1
P1-6 Katode D6 P1-13 Emitter Q4
P1-7 Anodes (all leds) P1-14 Emitter Q3
Table 7.2 Sensors Board pin-out