GE/Marquette T1900 Treadmill Control Circuits

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.

 

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!

 

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
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