Agilent Technologies U1840A Medalist sj5000 Hardware Manual page 142

11
Troubleshooting
11-8
In-Position sensor sensitivity
The In-Position sensor is triggered by the gantry or it is not
triggered by the board.
• Move the gantry over the sensor and decrease the sensor
sensitivity until the sensor is not triggered by any part of the
gantry or camera.
• Load a board and increase the sensor sensitivity until the
sensor is triggered by the board and not by the gantry.
• Adjust the sensor position to detect areas of the board where
there are no holes or dark non-reflective areas.
Failed boards will not exit the system
• The downstream SMEMA cable is not connected. Check the
sj5000 and the downstream conveyor.
• The downstream SMEMA cable does not meet Agilent
requirements. For older systems, the cable must have an
additional pin 8 and for newer systems additional pin 5 for
relaying the bad board signal.
• Verify that relays KA5, KA6 and KA7 are functioning for
single lane machines.
• On dual lane machines, for SMEMA downstream lane 1,
verify that KA 5, KA6, and KA7 are functioning. For lane 2,
check KA 12, KA13 and KA14.
Conveyor belt(s) reverse direction unexpectedly
This is typically related to a bad motor cable. The cables in
question are 5186-6308 and 5186-6309, they are routed from the
main control panel in the back of the system to each conveyor
motor.
• Refer to the Electrical Drawing document and verify that
the cables at XBM3 and XBM4 are not loose, and that the
cable connections at the motors are not loose or damaged.
• If necessary, replace the cables.
Clamp motor continuously rotates
• Reset the clamp home sensor.
Agilent U1840A Medalist sj5000 Hardware Manual