GE/Marquette T1900 Treadmill Control Circuits

Discussion in 'General Electronics Chat' started by MAlvis, Apr 9, 2016.

  1. MAlvis

    Thread Starter New Member

    Apr 8, 2016
    Does anyone have any data on the control circuits used in the GE/Marquette T1900 Treadmill?
    The control interface is RS-232.
    The Treadmill is lightly used but stopped responding to the start motor input.
  2. IamJatinah


    Oct 22, 2014
    Hi There,

    I haven't seen this animal yet, and wouldn't mind a pic of it. Off the top of my head, have you "split" the system checking for RS-232 to and from the lower board? You will need an O-Scope or RS-232 adapter, reader, snooper, analyzer.

    Most serial lines have specific drivers like the sn75als180 is it? These can indeed take a dump from time to time, and are usually in Transmit/Receive pairs near the connector placement.

    I have seen a lot of "digital"(RS-232, 2-wire, RS422/485) communications in fitness equipment, plcs and HMI items.

    Good Luck!
  3. cplcsf

    New Member

    Oct 19, 2016
    hello i have the pin out connections of T1900, and the service manual.

    i have on situation whit treadmill t1900, there are connected to MAX1 and i wont connect CASEp2. tellme if you now is possible this compatibility.

    best regards