Technogym Synchro Excite 7 cross trainer.is this the correct ic replacement ?

[petehall347]

https://uk.rs-online.com/web/p/line-...ce-ics/0833535

and does it even need it as nothing plugs in to those pins .

[petehall347]

Re: is this the correct ic replacement ?

bigger pic

[eccerr0r]

Re: is this the correct ic replacement ?

yeah probably right, does the board work with the broken one?
Probably for some optional equipment, I still don't get how that could have broke except for mechanical damage?

[petehall347]

Re: is this the correct ic replacement ?

yeah probably right, does the board work with the broken one?
Probably for some optional equipment, I still don't get how that could have broke except for mechanical damage?

board was working then i switched machine off and back on and no screen so took it apart and powered up then the magic smoke came out .
its a technogym synchro excite 7 cross trainer .
this was after i put new caps into power supply but it still wouldnt come until i started taking panel apart then i screwed it back down and still working .. maybe i did short something or that ic was failing already .
do you think i should remove the chip and see if it then works ?

[stj]

Re: is this the correct ic replacement ?

74ACT244 high speed buffer - did you connect that cable upside-down or offset by a pin?

[petehall347]

Re: is this the correct ic replacement ?

74ACT244 high speed buffer - did you connect that cable upside-down or offset by a pin?

nothing there to plug into those pins .

[petehall347]

Re: is this the correct ic replacement ?

still wondering if its a good idea to remove the ic chip and see if it powers up ok without it ?
its just i haven't a clue as to what its there for and cant find any manuals for this exact console .
its just that the machine is ten miles away and will need to bring the panel back here to work on it so the miles will soon clock up .

[stj]

Re: Technogym Synchro Excite 7 cross trainer.is this the correct ic replacement ?

cant you take the hot air station and tweezers to the machine?
you wont do damage running it without the chip - at worse the touchscreen wont run right.

[petehall347]

Re: Technogym Synchro Excite 7 cross trainer.is this the correct ic replacement ?

there have been developments .i removed the chip and powered it up but it was tripping then a pop and spark and more smoke .. a cap left the board c61.. i then took a look at 5.0v and 3.3v points marked on the board . 3.3v ok 5v at 9.6v so it then was then apparent why that ic blew up .
took a good look at the board and a buck controller ic had been pushed so its pins were bent . removed it and straightened the traces on the board the best i could .now searching for another max1761 converter . hoping to find one on an old laptop board .

[petehall347]

Re: Technogym Synchro Excite 7 cross trainer.is this the correct ic replacement ?

c61 ..thinking 10uf ?
and bent controller .. tried straightening its legs but one fell off like they do .
am hoping nothing else got cooked .

[petehall347]

Re: Technogym Synchro Excite 7 cross trainer.is this the correct ic replacement ?

hoping i got these pads straight enough for the max1761 i did lose one but looks easy enough to bend the corner pin onto where i scraped it back a bit .

[petehall347]

Re: Technogym Synchro Excite 7 cross trainer.is this the correct ic replacement ?

i am wondering if it would be ok to replace the blown c61 with a regular 10uf cap ? at least whilst testing .
i still cant find that max1761 chip yet at the right price .

[petehall347]

Re: Technogym Synchro Excite 7 cross trainer.is this the correct ic replacement ?

ok more thing developing .or rather i am finding more shorted things ... at least 1 dual fet and one single one . replacements on the way for all parts needed up to know .

there is something a bit odd by the inverter connection .. single fet 8 pin p channel has been changed before and rather badly it is shorted and a trace has been cut ..will add photos shortly ..

[petehall347]

Re: Technogym Synchro Excite 7 cross trainer.is this the correct ic replacement ?

am wondering about powering this thing up to test when new parts fitted . it looks like it should have 12v and 5v lines .i dont have a bench supply as yet but do have plenty of pc supplies . with these being switch mode supplies the variac isnt much use .
am thinking resistors and fuses but dont have a clue what its supposed to draw on each line ..any suggestions would be gratefully received . its just when things pop and crack and the smoke releases it pisses me off big style .

[petehall347]

Re: Technogym Synchro Excite 7 cross trainer.is this the correct ic replacement ?

i forgot to mention the shorted fet by the inverter is a IRF7406 .
the others are by the damaged max1761 and are IRF7319. one might be ok but measured 5 ohms at one point i presume my meter switched it on so changing it anyway .
its the cut trace and the fet bothers me as i dont know if part is correct one or if cut trace is from factory or a bodge .

[petehall347]

Re: Technogym Synchro Excite 7 cross trainer.is this the correct ic replacement ?

will be ready to power this up soon ... what wattage bulbs should i use to limit the current enough from a pc power supply ?

[petehall347]

Re: Technogym Synchro Excite 7 cross trainer.is this the correct ic replacement ?

ok after some sweating and wasting a chip that cost 6 quid because of my bad soldering . its maybe back in business ..

[petehall347]

Re: Technogym Synchro Excite 7 cross trainer.is this the correct ic replacement ?

more problems now .tried it back on the machine and the touch screen is not working and it reboots itself about every 30 seconds so must be more damage .. i don't really know how to diagnose it as no service manual for it .