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Model Forum / Radio Controlled / Land Models / February 2006Cooked all three Servo's??
First time posting here, so far I've been able to solve all my problems in the archieves, but not this one. Yesterday a friend and I went for a rip session, and I ended up with a screwed up sav. I've got a Savage 25, stock servo's, a couple linkage mods that the previous owner did, a Futaba 3PM FM radio and receiver, and that's about it. I put a new A3 plug in it yesterday since it was about 30f outside and it was running great! I ran half a tank while my friend was trying to start his T-maxx, ha! Anyway, he finally starts his and within ten seconds I "accidentally" sideswiped him and his fuel tank exploded. Fuel everywhere, totally destroyed the tank. So, off to the LHS for a new one. While we were there we thought it'd be a good idea to run the track for a while. Since it was so cold the ground was super hard and the landings had to be spot on or else. Since I'm pretty new at this most were not. After dislodging my hump pack from the 2 sided tape and ejecing it several times [here's the problem, I got to it evntually] my sav wouldn't shift out of reverse. My radio signaled 'Low Battery', so I put in 8 fresh alkalines. Then, the steering went full lock left and wouldn't turn. So, I assumed I had a low battery in the truck. This afternoon I charged the pack and tried to sort it out and I still have some issues. It'll steer left only, throttle works but not brakes, i.e. only one direction, and it'll shift into reverse but not out of it. Any ideas? Is something cooked? What and how do I start about sorting this mess out? Thanks in advance for your help! Josh > First time posting here, so far I've been able to solve all my problems > in the archieves, but not this one. [quoted text clipped - 28 lines] > > Josh The only real way to do it is to test each bit seperately - beg/borrow/steal some other servos and RX to test it with, and see which bits are buggered. Sounds like the receiver or crystal to me though to be fair.  SignatureDan Is the truck running a failsafe unit?...if so, reset it. Check all the plugs in the receiver. Check all the wires..battery/servos/receiver and antennae Check your crystals. If you hear a clicking or whining noise when turning right...the servo may be stripped. Did your receiver get wet or soaked with fuel?..If so take it apart and spray the board with ELECTRIC motor cleaner and reassemble. > First time posting here, so far I've been able to solve all my problems > in the archieves, but not this one. [quoted text clipped - 28 lines] > > Josh Inline... > Is the truck running a failsafe unit?...if so, reset it. Nope. > Check all the plugs in the receiver. Did it. > Check all the wires..battery/servos/receiver and antennae Did it. > Check your crystals. Ordered a new one... Hoping that'll solve it. > If you hear a clicking or whining noise when turning right...the servo may > be stripped. Nope. Teeth are good. > Did your receiver get wet or soaked with fuel?..If so take it apart and > spray the board with ELECTRIC motor cleaner and reassemble. Nope, the T-Maxx tank exploded, not mine. I kept right on driving. >> First time posting here, so far I've been able to solve all my problems >> in the archieves, but not this one. [quoted text clipped - 28 lines] >> >> Josh I seriously doubt you wasted all your servos. Not impossible, but highly unlikely. As suggested before, I'd try another receiver or crystal. Also, have you tried switching the direction of your servos on the transmitter? This might give you an idea about the servos if you get the direct opposite results. I'd also put a volt meter on your receiver pack to make sure it is being charged completely as well. I don't know which type of charger you are using for your receiver pack, but if it is just a plug-in-the-wall style that has no peak abilities, then you might not be getting a full charge or possibly have a bad battery. Patrick >I seriously doubt you wasted all your servos. Not impossible, but highly >unlikely. As suggested before, I'd try another receiver or crystal. Also, >have you tried switching the direction of your servos on the transmitter? >This might give you an idea about the servos if you get the direct opposite >results. I tried reversing the servo's on my radio and nothnig happens. I ordered a new crystal yesterday so we'll see if that fixes it. > I'd also put a volt meter on your receiver pack to make sure it is being > charged completely as well. I don't know which type of charger you are > using for your receiver pack, but if it is just a plug-in-the-wall style > that has no peak abilities, then you might not be getting a full charge or > possibly have a bad battery. I'm using a Phrophet multi charger set at 1 amp. It beeps when it's done. That's about all I know... Thanks for your help, hopefully the crystal will fix it. jjd >>I seriously doubt you wasted all your servos. Not impossible, but highly >>unlikely. As suggested before, I'd try another receiver or crystal. Also, [quoted text clipped - 15 lines] > > Thanks for your help, hopefully the crystal will fix it. If it's not the crystal, i'd be suspecting the receiver or even the tranny (or tranny crystal - though I've never known of one of them busting...) SignatureDan >> Thanks for your help, hopefully the crystal will fix it. > > If it's not the crystal, i'd be suspecting the receiver or even the tranny > (or tranny crystal - though I've never known of one of them busting...) If the crystal ends up not fixing it, can I use any FM receiver? Or do I have to stick to the same one I'm replacing? > First time posting here, so far I've been able to solve all my problems > in the archieves, but not this one. [quoted text clipped - 28 lines] > > Josh New FM crystal came in today, so I popped it in, now nothing happens. I'll wait until tomorrow before I start monkeying around with things. Question for the group, are the crystals directional? As in positive and negative? I know the Rx and Tx are different. Also, can I use any Rx with my Futaba radio? Does it have to be the exact replacemnt of the one I'm replacing? Thanks again, jjd > New FM crystal came in today, so I popped it in, now nothing happens. I'll > wait until tomorrow before I start monkeying around with things. Is the new crystal the same frequency as the old one? Sounds like you bought the wrong frequency. > Question for the group, are the crystals directional? As in positive and > negative? Nope. Either way works. >I know the Rx and Tx are different. Also, can I use any Rx with my Futaba >radio? Does it have to be the exact replacemnt of the one I'm replacing? Any rx on the same band and frequency will work. Doc "Doc" wrote: >>New FM crystal came in today, so I popped it in, now nothing happens. I'll >>wait until tomorrow before I start monkeying around with things. [quoted text clipped - 13 lines] > > Doc On 75 mhz FM band Futaba only works with Hitec. JR, Airtronics, and KO are incompatible. Easy to reference, just check the XXTRA receiver on tower hobbies. SignatureJustin Mahn > On 75 mhz FM band Futaba only works with Hitec. JR, Airtronics, and KO > are incompatible. Easy to reference, just check the XXTRA receiver on > tower hobbies. Thanks for the correction Justin! Doc >> New FM crystal came in today, so I popped it in, now nothing happens. >> I'll wait until tomorrow before I start monkeying around with things. [quoted text clipped - 13 lines] > > Doc It's entirely possible, I thought if I got a FM 75 I'd be fine. I've got the original HPI AM radio and Rx at home. I'll try switching some things around this afternoon and post my findings. Thanks guys. jjd >>> New FM crystal came in today, so I popped it in, now nothing happens. >>> I'll wait until tomorrow before I start monkeying around with things. [quoted text clipped - 17 lines] > the original HPI AM radio and Rx at home. I'll try switching some things > around this afternoon and post my findings. Whip the crystal out of the tranny, there will be some numbers written on the side, that's the exact frequency, make sure the one you're putting into the RX is the same :) SignatureDan >>>> New FM crystal came in today, so I popped it in, now nothing happens. >>>> I'll wait until tomorrow before I start monkeying around with things. [quoted text clipped - 22 lines] > the side, that's the exact frequency, make sure the one you're putting > into the RX is the same :) There's a crystal in the tranny too? Sonofa... I posted on savage-central.com and a guy there says " get a different freq., couldn't hurt to have an additional one in case the crystal is OK..." jjd Anyone want to buy a lightly used Savage? Inline............................. >>> It's entirely possible, I thought if I got a FM 75 I'd be fine. I've got >>> the original HPI AM radio and Rx at home. I'll try switching some things >>> around this afternoon and post my findings. There are about 40 frequencies on the FM 75Mhz band. You need both crystals to be the same frequency. > There's a crystal in the tranny too? Sonofa... Nooooooo, Dan's probably been boozin' again! > I posted on savage-central.com and a guy there says " get a different > freq., couldn't hurt to have an additional one in case the crystal is > OK..." Very true. > Anyone want to buy a lightly used Savage? It's not the Savage's fault you bought the wrong frequency crystal and/or have faulty radio equipment! Doc > Inline............................. > [quoted text clipped - 8 lines] > > Nooooooo, Dan's probably been boozin' again! I meant in the transmitter :) SignatureDan |
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