What's the meaning of letters?

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ROSELJR
Posts: 5
Joined: Tue Aug 10, 2021 4:48 pm

What's the meaning of letters?

Post by ROSELJR » Thu Oct 07, 2021 11:31 am

The meaning of the letters in the wiring on the controller circuit board 10
I removed a tram controller. What is the meaning of the letters on the wiring of the circuit board inside?
D+ D-
A B C
W V U +5V GND
HH
L HL GND
SP GND +5V
DSP GND
I only know +5V and GND, but I don’t know anything else. Please help, thank you!
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