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Likely the unit is detecting a reverse direction. Could be the reverse switch, adjustment, or debris. Try using the ROS position on the ignition switch. If the problem goes away then it is definitely reverse operation related and further diagnosis of reverse detection required.
You can only preset stations one by one. First, you can do a full scan for all stations in range. Press and hold the Stop button on the unit. Press Play/Pause to start the scan. (There are alternate methods using the remote control. See page 17 of the manual.) Press Fast Forward or Fast Reverse on the unit to navigate through the stations that have signal.
To set a preset, tune in a station using the Tune+/Tune- buttons on the remote or Fast Forward/Fast Reverse. Then press and hold Prog/Preset on the remote. When you see ##Empty or a preset number, use Tune+/Tune- to select one of the 20 preset storage numbers. Press OK/Play/Pause to save the preset. (If using the buttons on the unit, press Fast Forward/Fast Reverse to select a preset location. Press Play/Pause to save. You will see Stored on the display in either case, if you successfully saved the frequency to the location.
The days of electric vehicles having a rheostat speed control and huge switches to change motor direction are far behind us.
Most modern electric vehicles employ a good deal of electronics with a switch mode power supply for speed regulation which controls hefty semiconductor devices. The forward/reverse switch would typically engage/disengage either relays or more semiconductor devices.
These devices are often placed on a common circuit board and any problems will need specialist investigation, repair or replacements. It is most unwise to reverse battery polarity when electronics are present - it is likely by doing so you have increased the repair cost...
I recently tried the DIY service and repair manuals from a website and it actually helped me repair transmission problem in my jcb 3cx site-master.
It would'nt move forward or reverse, engine was good both solenoids for forward and reverse worked, but still couldn't diagnose the problem.
I don't have much technical knowledge but I just followed it step-wise, and now it works perfect! covers wiring, codes, diagrams, torque specs, PCV, everything
got it from www.reliable-store.com
Play / Pause is on the left (in your picture).
Stop is next to it,
Then Fast Reverse (hit more than once for even faster reverse)
Then Fast Forward (hit more than once for even faster forward)
Touch the screen, and 'reverse', 'pause', and 'forward' icons will momentarily appear on the lower portion of the screen. Before the icons vanish, touch either the forward or reverse icon and continue to hold your finger on the icon without lifting it off of the screen. Fast forward or rewind will then begin, at a rate of 5 seconds per second held. I am told after holding for 15 seconds or longer the speed of the fast forward may increase (true for other Coby models I have owned), but so far I have had no luck getting this to occur with my MP828.
Have you changed transformers? You can also make a Lionel run in opposite direction by using the throttle control...just go to stop and then to power and then back to no stop and right to power. That often works.
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