Edge & Crunch Sensors Check supply voltage Black lead of meter on tab IC8 (Main PCB)
- Transmitters Should read 1.3Vdc Red lead of meter on red wire of CN8 and
yellow wire of CN16
ToAdjust these voltages Adjust VR4 Edge sensor & VR8 Crunch sensor.
Crunch Sensor Check voltage 1Vdc Meter across Red/Black of CN16 (Obstruct
- Receiver Beam and Voltage will rise to approx 4.2 Vdc)
Voltage will increase/decrease by adjusting intensity of transmitter (pot VR8)
Edge Sensor Check voltage 0.46Vdc Meter across Red/Blue of CN8(Obstruct
- Receiver Beam and Voltage will rise to approx 5 Vdc)
Voltage will increase/decrease by adjusting intensity of transmitter (pot VR4)
Safety Circuit Faulty Check Voltage on Any Switch or Wire, Open circuit will be 0Vdc
No Drive. CN7 =10/12 Vdc
To Check PCB. Black lead of meter on tab IC8 (Main PCB) Red lead of
meter on brown wire plug6 CN7 should read 12Vdc
To Check Cable Unplug CN7 (meter set to Ohms) place probes
across plug If no continuity then check each switch.
Error Double Sheet Check link on CN13 is correct. Replace link, check wiring diagram.
Detected. Error 3
Slot Sensor Blade CN3 Black lead of meter on Yellow (ground)
Red lead of meter on Green = 0.2Vdc obstructed
Approx 4Vdc not obstructed.
Red lead of meter on Blue = 5Vdc
Red lead of meter on Red = 1.2Vdc
Home Position Switch Remove plug from CN13 Check continuity across wires (make and break switch)
Section 11 Trouble Shooting
Fault Reason Solution
Page 34
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