Spare Parts on an MDD

Symptoms/Issue

I am trying to swap fuses/DMX chips on my MDD but I don't know where to locate the spare parts on the board. 

Visualization 

Description

U1 [DMX Transceiver] is responsible for all incoming data. Use U16's spare chip or purchase Z1458-F as a replacement. 

U3, U6, U9, U12, U15, & U19 are the transceivers for outgoing data. Use U16's spare chip or purchase Z1458-F as a replacement

U4, U7, U10, U13, & U17 are the optical isolators for the chips above. There is no onboard spare, but Z423-F may be purchased as a replacement. 

F2 - F12 [Data Fuses] are responsible for individual outputs. Use F4 or F7 to replace any of these fuses.