Blown Fuse Ipilot ?

Went fishing last week and my HB 565 started acting up, every time the TM started or changed speeds I would get black lines up & down on the screen about half way up ???:confused: got home took head off of my Terrova I- Pilot 24 v US2 and found 3 amp blown fuse ?? replaced fuse, now if the motor starts or changes speed I will get a short burst of lines about 1/2 inch or so then will go away until the next speed change ??? didn't notice this before the blown fuse, but it could have been doing it as long as I've had it set up this way, Tried a diff. transducer on the 565 and no interference, so is this something that all US2 do ??? or do I need something to fix this ?? I can live with the short burst every once in awhile but still don"t like it .:mad:Also why would the fuse blow in the case ground ??
THANKS:D

I'd like to see a schematic of their trolling motors. My Terrova is causing some interference on the front unit but I am not using US2. My fuse is good and I have continuity from the negative to the bolt that holds the prop on. I'm going to try some other things once I get my unit back.

The V2 US2 transducer shield (which is grounded to the TM motor housing) couples thru the Head unit and makes connection to the starter battery if the starter battery is the source of power/ground. The brown fuse wire inside the TM housing ties TM ground (not the TM PWM ground) to the TM housing. Big ground loop.

I don't know about Terrova, but prob the same.

Here is a circuit I just drew up based on what I have metered. Should be pretty close.

http://i188.photobucket.com/albums/z...2grounding.jpg

From all the complaints about US2 it's more of a headache than it's worth. It makes the troller cost more then you have to spend more to get rid of the screen "noise" that it causes. JMO.
Yes a corded TD on the troller has cord issues, but with a little care when deploying and retrieving it can be handled easily.

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Originally Posted by HARLEYBOY

Went fishing last week and my HB 565 started acting up, every time the TM started or changed speeds I would get black lines up & down on the screen about half way up ???:confused: got home took head off of my Terrova I- Pilot 24 v US2 and found 3 amp blown fuse ?? replaced fuse, now if the motor starts or changes speed I will get a short burst of lines about 1/2 inch or so then will go away until the next speed change ??? didn't notice this before the blown fuse, but it could have been doing it as long as I've had it set up this way, Tried a diff. transducer on the 565 and no interference, so is this something that all US2 do ??? or do I need something to fix this ?? I can live with the short burst every once in awhile but still don"t like it .:mad:Also why would the fuse blow in the case ground ??
THANKS:D

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Do you have an on board charger? If so, try disconnecting it. Also feel the US2 transducer cable and see if it is getting "warm".

After reviewing my own drawing, a poor TM ground connection could also cause excessive current thru the fused wire.

Cane, How would I check for a bad connection ? is it not all sealed from motor & control box , except for the short fuse wire ? Thanks

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Originally Posted by HARLEYBOY

Cane, How would I check for a bad connection ? is it not all sealed from motor & control box , except for the short fuse wire ? Thanks

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Check at the battery post and by removing the cover at the TM. The power is plugged into the TM module via spade lug. Just cause it came from the factory don't mean it can't come loose or corrode. Just a scientific guess here.

Take your meter and measure between TM batt negative and the crank batt negative with the sonar head unit plugged but no power turned on. You should read near continuity. Unscrew the knurled us2 cable. Check to see that the connection between the TM batt negative and start batt is now open (after you undo the pig tail cable). If you are still reading ground, then you have something else shorting the battery negatives together.

Do you have an on board charger?

Will try that Cane, And yes do have an on board charger , ? 2 bank for TM , and single for cranking,. Thanks

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Originally Posted by HARLEYBOY

Will try that Cane, And yes do have an on board charger , ? 2 bank for TM , and single for cranking,. Thanks

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When you meter between the tm and start negatives after removing the us2 knurled connector, if you do not read on open circuit, try disconnecting one charger output at a time. Might find something there. I am guessing or should say that is what I would instinctively check.

Also, if your charger does remove the fault, put them back on one at as time, measure continuity, then remove connection, put the next output on, measure continuity, remove, etc. This will check each output individually just in case you have parallel faults.

Thanks Cane ,Will do

Cane , Went from - on start to - on TM batteries , 51 ohms , disconnected US2. went to 0 ohms, connected US2 back went from - Start batt. to US2 conn. same 51 ohms, So seems like this is open but still high res. don't you think ? just if it is a loop should be just the wire . fuse etc, don't you think or does it go through the brushes ??? or I'm I missing something,also did not mess with chargers because of the first test . THANKs

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Originally Posted by HARLEYBOY

Cane , Went from - on start to - on TM batteries , 51 ohms , disconnected US2. went to 0 ohms, connected US2 back went from - Start batt. to US2 conn. same 51 ohms, So seems like this is open but still high res. don't you think ? just if it is a loop should be just the wire . fuse etc, don't you think or does it go through the brushes ??? or I'm I missing something,also did not mess with chargers because of the first test . THANKs

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There is 51 ohms resistance somewhere. You should be reading something close 50 foot of "wire" and I would believe that is high resistance based on the length of wires involved. This high of a reading could be caused by a corroded connection somewhere in the loop. I will check my unit this week end and get back with you. Can't remember the reading. I usually write stuff like this down for reference. Old age slippin' up on me. ha

The connection is thru the motor housing, not the brushes.

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Originally Posted by Cane Pole

The connection is thru the motor housing, not the brushes.

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This is why I want to see a schematic. I read continuity from the negative to the prop shaft. Too many beers tonight....

Thanks Cane, 51 ohms is what I read and I also think its HIGH also , it's raining down this way today good day to look some more on it , may be loose connection on the pins of the 565 ? or bad crimp on wire ? will check . THANKS

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Originally Posted by Big Ridge Brewer

This is why I want to see a schematic. I read continuity from the negative to the prop shaft. Too many beers tonight....

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The prop shaft is connected to the TM housing via motor bushings or bearings. The TM housing is grounded via fuse wire to TM battery wire.

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Originally Posted by Cane Pole

The prop shaft is connected to the TM housing via motor bushings or bearings. The TM housing is grounded via fuse wire to TM battery wire.

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Gotcha. There is continuity from the fuse holder to the shaft also, so it looks like everything is bonded together as long as the fuse is good.

I have a wedding to attend today in Franklin but I'll dive back into this problem here in a few days. I want the noise gone before I head to Beaver Creek. Don't want to hear any grief from that crew I'll be fishing with in a couple weeks. :D

Cane , went out and rechecked found I still had the 565 on at time of check yesterday and so the 51 ohms, today 1.5 ohms with unit off and 51 ohms on, Dumb me but like everyone getting old !lol, But still have some black lines at bottom of screen about 2" high at some speeds on TM, like every other one on Ipilot remote, is there something that I can get to reduce this? or will I have to live with it using the US2 ? some of the lines come and go and some stay at diff. speeds don"t remember them before the fuse opened up but they are here now , THANKS

1. Check the strength of your ground. It should be close to what the reading is for when you touch the probes together. (resistance)

2. Check for corrosion on the terminals and where the wire connects to the terminal connector, and if the cables are stranded check for corrosion in the wires (If there is corrosion present where the insulation starts there may be corrosion on up under the insulation). I had this problem on one of my trucks (yrs ago). This can cause a poor connection through poor conductivity.

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Originally Posted by HARLEYBOY

Cane , went out and rechecked found I still had the 565 on at time of check yesterday and so the 51 ohms, today 1.5 ohms with unit off and 51 ohms on, Dumb me but like everyone getting old !lol, But still have some black lines at bottom of screen about 2" high at some speeds on TM, like every other one on Ipilot remote, is there something that I can get to reduce this? or will I have to live with it using the US2 ? some of the lines come and go and some stay at diff. speeds don"t remember them before the fuse opened up but they are here now , THANKS

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The noise could be PWM noise or commutation noise or both or EMI or RFI. Try one of these 2 chokes. They are 2 piece ferrite from Radio Shack. Might help some. Removing noise is scientific guessing. Swags. You gotta match the choke filter to the noise frequncy, then poof!!!!!!no mo noise.

http://i188.photobucket.com/albums/z...oisefilter.jpg

Cane what is the # on the chokes ? may try them . Thanks

radio shack #273-104

Cane put the chokes on didn't see any difference in noise , tried it a alot of ways same noise , seems like every 1/2 speed on Tm gives the most noise ? took the US2 out again replaced with the other transducer no noise what else ? does HB or MK have something to fix this or do I just need to do away with the US2 ? and mount the transducer on the motor ? noise fills about 1/2 the screen on the 565 takes out most of the bottom, maybe I just need to keep it off 1/2 speeds , LOL THANKS

HB makes a big honker common mode choke. I believe HB sells a guess bag of gadgets to help with the noise on the HB side imaging units. The are just swagging like us. Try this, if not try this, etc.

We have covered some basics, but HB may have other suggestions. I doubt it though. Give HB a call. They nice folks.

I will be looking into the noise issues whenever I have a chance to get to the lake for a few days. I have an oscilloscope there and I will "scope" some stuff out. ha. I have a little noise coming from the us2. I will check different speeds and see if I can come up with the frequency that causes the interference.

I can't do too much at present as I am still caregiver for my wife. She is getting better.

Thanks Cane, hope wife does get better,, thanks for taking time with my small problem , now get back to that care giving , THANKS

Read all this link..........

Unofficial Humminbird Side Image Forums www.sideimageforums.com :: View topic - 788CI HD DI interference

Did the read, mine is not si or di, do you think the PC-11 Power Cable may work ? if so will get one , Thanks

HB will give you the choke for free. I would definitely call them.

Hey guys thanks, Called HB this morning stayed on hold all of about 3 min. Wow ! they are going to sent me a PC 11 power cable to try, told me if that didn"t fix the noise to call them back and we could try something else ? great CS so far !!!!!! Heck I can"t call my wife at her work without staying on hold more than 5 mins,must be they know I"m from ALABAMA , LOL and thats why I got so good CS< he-he.,HAVE A GREAT DAY And thanks !!!!

I told you they had a bag of tricks to try. Noise is hard to fix. There is no silver bullet. Try this, if no, try this.

Good luck.

Hope this is the one that fixes it ? lol thanks Will keep it on the post about if it does

Talk about FAST, FedX got the PC11 cable to me today ! WOW fast from HB I Just talked to them yesterday , will try out tomorrow. hope this works

Got the boat out today, lol , Every thing worked great ! no noise on the DF, Tried every speed on the Terrova, well I think that fixed it, Thanks everyone and HB also, first day I was able to get it on the Water , only 6 crappie only 2 keepers, lol, but had a great day with my bud & Me , Just to get on the water awhile & play with the I-Pilot, and Fuss with my Bud , Ha , By the way CP thanks for the HELP,