I have an MTH UP Veranda, 20-2185-1, on which the MARS light quit working. The bulb comes with a 2-pin connector. Can someone tell me how many volts is provided by the board where the bulb connects, and is it AC or DC current?
Original Post
Replies sorted oldest to newest
6 volts if it is a grain of wheat bulb! it is fed with a PWM signal not a direct voltage! pulse width modulization created on the board to feed the lights! That engine uses a ps 2 5volt board and the lights use FET which control the lighting each lighting circuit uses a fet for control through the use of a dcs remote! the Fet is probably defective as long as your light is not burnt out! I would disconnect the light connector and test it with a battery or use a vom digital meter, if the light reads infinity wide open it's bad otherwise it is a board problem and a ASC tech can repair it for you!
Alan
How about a picture of the bulb?
John,
I prefer to not take the shell off again until I decide what course of action to take to find a replacement bulb. However, it is a very small grain of wheat bulb that is held in place by a rubber grommet that goes through a metal frame that also supports two board bulbs of the same size. Attached to the bulb are two white wires and a 2-pin connector to the board. If the board controls the signal, is the bulb a regular grain of wheat bulb, or is this bulb unique? This is a PS-1 engine.
A PS/1 engine likely has a separate board that controls the MARS light. Does your engine have a board that looks something like this driving the lights?
Attachments
John - yes, the engine has a similar board.
Plug one of the other lights into the MARS slot and see if a known good bulb works there. The bulb is a 6V 60ma 3mm bulb, at least the ones I've seen are. Obviously, no polarity issues, it's an incandescent bulb.
