The Brain

An irrigation tech knowledge base, by BoardTronics.

Topics include troubleshooting, how-to's, and more!


Check voltages

  • Look for the three voltage indicator lights on the Power Distribution Board. When on, these lights show the presence of 5V, 9V, and 12V, as indicated on the board.
  • If none of the of the voltage indicator lights on the Power Distribution Board are on, power may not be getting to it from the Power Supply. Check the Power Supply Switch & Circuit Breaker on the Power Supply to see if it is tripped. Reset it if this is the case.
  • If the Power Supply Switch & Circuit Breaker is not tripped, check for 13-VAC using a voltmeter at the white 4-pin connector on the Power Distribution Board.
  • Also, the Power Distribution Board voltages can be checked at the 4-pin connector next to the indicator lights using a voltmeter. The pins on this connector, left to right, are connected to Ground, +12V, +9V, and +5V. Place the black lead of the voltmeter on the Ground pin and measure the desired voltage using the red lead on the appropriate pin. Be very careful not to touch more than one pin at a time with either of the two leads.
  • If the voltages on the Power Distribution Board are correct, look for the voltage indicator lights on the Timing Mechanism. These lights should also be on, showing the presence of their corresponding voltages.
  • If any of these three lights are not on, but the same voltage indicator lights on the Power Distribution Board are on, there is an open circuit or bad connection within the Timing Mechanism, Power Distribution Board, or the 40-Pin Cable connecting them together.


HOW TO: Reinitialize a Timing Mechanism

Press the "Satellite Settings" button. Use the Down Arrow button to move down to the line that reads "Reset Unit: No". Turn the knob to change the "No" to "Yes", then press the Down Arrow button one more time. This screen...

ISSUE: 8 consecutive stations are not turning on

Determine which 8-Station Output Board is linked to the eight stations that are not coming on. Check the 24VAC indicator light on the corresponding 8-Station Output Board. See the picture below...

ISSUE: A single station is not turning on or is stuck on

The first step to resolving this issue is checking the 8-Station Output Board: Check the LED indicator lights on the corresponding 8-Station Output Board. If one is stuck on, the 8-Station...

ISSUE: Multiple stations are not turning on or are stuck on

Check the 24-VAC indicator lights on each 8-Station Output Board and on the Pump Common. They should all be illuminated. If none of the lights are on: Check the 3.2A fuse on the Power Supply...

ISSUE: Timing Mechanism is dead

Move the Timing Mechanism to a known functioning satellite. If the Timing Mechanism is still not getting any power, this points to an internal problem with the Timing Mechanism and it should be repaired or replaced...

ISSUE: Timing Mechanism is reporting the wrong number of stations

Remove the Timing Mechanism from the satellite and install it into a different functioning satellite and see if the reported number of stations is correct. If still incorrect, reinitialize...

ISSUE: Timing Mechanism is running slowly

This issue is a symptom of an internal processor failure within the Timing Mechanism; the Timing Mechanism should be reconditioned.

ISSUE: Timing Mechanism not communicating with central computer

Check the RX/TX indicator lights on the Modem. Normal operation is for the RX light to come on often and the TX light to come on occasionally. If both lights remain off: Check the fuses on the...