Le trouble2

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Lynx Express (LE) Trouble Shooting Guide

No power or missing 3.3v/5v

No 5V led or 3.3V LED
1) Blown fuse in LH lower corner and blown fuse in the lower RH corner if the AC jumpers are installed on the AC buss bottom center.
2) Transformer installed backwards PLEASE BE REALLY CAREFULL HERE can cause very high AC voltages in the output side of the transformer to the bridge rectifier my burn parts and may blow fuse/fuses.
3) Bridge rectifier upper left corner install wrong no unregulated DC voltage or blown fuse/fuses
4) 4700 micro farad capacitor upper left corner in backwards Confetti or smoke.
5) Both voltage regulators LD1117c and/or 7805 installed backwards.
6) Both valid power 5v/3.3v LEDs installed backwards.
7) No current limiting resistors 180 or 330 ohm next to the valid power LEDs.
One of the valid power LEDs not on
1) The voltage regulator LD1117c for 3.3 volt in backwards or 3.3 volt LED in backwards or missing 180 ohm resistor missing.
2) The voltage regulator 7805 for 5 volt in backwards or 5 volt LED in backwards or missing 330 ohm resistor missing.

No DMX

No data link led
1) Wireless jumper remove with no wireless module installed.
2) RS485’s installed wrong, bad RS485
3) Problem with PIC24FJ32GA002 not programmed, not installed right or wrong PIC

Three display digits not working right

Display digits are not working

category=Trouble-SIDEBAR

1) Displays are in backwards, SAA1064 is in backwards
2) 2700 Pico farad capacitor is not installed, installed to deep into the board and is insulated
3) Problem with PIC24FJ32GA002 not programmed, not installed right or wrong PIC

No outputs to lights

1) H11AA1 install wrong or is bad, missing 2K or 15K resistors.
2) Problem with PIC24FJ32GA002 not programmed, not installed right or wrong PIC
3) LED installed backwards.
4) 3023 installed wrong or bad chip
5) Missing 180 ohm resistor
6) Tric bad or installed backwards