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526 Posts
Ok you electronic wizards….
Thanks again Paul but.....
I’m usually pretty good at logical trouble shooting but I’m stumped with this one and I have to move on. Perhaps someone can help…
1. New lamp PCB’s installed in a GP9. (The old ones were removed for another engine and new ones ordered from USAT.)
2. Engine tested on track with other GP9’s and seems to run well â€" in the correct direction etc. Starts to move (on rollers) at 1 volt.
3. Cab light ok.
4. Both lamps PCB’s have NO headlights - in either direction. (four lamps test ok â€" not open cct anyway)
5. Marker lights come on, and flicker, at 6 â€" 8 volts rather than usual 3 â€" 4 volts and are always indicating the wrong direction. i.e. always red on the going forward end and always green on the going backward end.
6. Number board lights seem less than about ½ bright and stay that way as voltage increased.
Should I just order a new main board?
Thanks in advance.
Dave
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Thanks again Paul but.....
I’m usually pretty good at logical trouble shooting but I’m stumped with this one and I have to move on. Perhaps someone can help…
1. New lamp PCB’s installed in a GP9. (The old ones were removed for another engine and new ones ordered from USAT.)
2. Engine tested on track with other GP9’s and seems to run well â€" in the correct direction etc. Starts to move (on rollers) at 1 volt.
3. Cab light ok.
4. Both lamps PCB’s have NO headlights - in either direction. (four lamps test ok â€" not open cct anyway)
5. Marker lights come on, and flicker, at 6 â€" 8 volts rather than usual 3 â€" 4 volts and are always indicating the wrong direction. i.e. always red on the going forward end and always green on the going backward end.
6. Number board lights seem less than about ½ bright and stay that way as voltage increased.
Should I just order a new main board?
Thanks in advance.
Dave
Â
Â