The following pictures show various components of the LBV System. Please refer to these when troubleshooting. It will also be helpful to utilize a digital multimeter for some of the checks required. Please remember that at no time should any component be plugged-in or unplugged while the SPS or LBV is energized during fault diagnosis.

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Motherboard Communications LEDS (Usually flashing green)	Motherboard 12VDC & 5VDC (power) LEDs (Usually solid red)

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Control Console (CC) LEDs above Auto Depth & Heading	Surface Power Supply LEDs left - power (red solid), right - status (amber flashing)

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Umbilical, LBV-End Note Pins 1, 2 and 3