Boards.ie

DublinDilbert · 14-05-2012, 13:07

Quote:

Originally Posted by voxpop

is re-flowing something a novice could do - ive soldered a few things but nothing this precise

Yea re flowing is a simple as it gets. If you have a flux pen just put a dab of flux on the joint, this will help remove the impurities and get the solder so stick better.

deandean · 14-05-2012, 20:08

But beware Voxpop, you can damage components and even the PCB if you start cooking stuff. That soldering iron you are showing might be a 40-Watt; I'd be using a 15W iron there.

If you don't have good soldering experience and a suitable size tip on your iron, I suggest you beg a favour from someone who's good at soldering. Reflow is only a 15-minute job; replace transistor maybe 45 minutes.

Getting the LCM out of the car, and getting the PCB out of the casing is the hard & time-consuming part.

Is that corrosion on the PCB or is it heatsink paste?

Quite a few LCMs have failed 'cos of water ingress, water gets in, uh, bulkhead or door seal or somewhere and gets into the module. Check passenger-side footwell carpets are completely dry while you're in there.

Hope it all works out for ya

The LCM in mine failed on the input side; it was my first fault with the car & I went to a main dealer

first they replaced the indicator stalk about €300, then the LCM another €600 (slight reduction after discussions). With hindsight, main dealers only replace stuff. With a car a few years old you want to be able to fix stuff, and that is where online forums & a good indy or two, really shine!

voxpop · 14-05-2012, 23:24

yeah i was thinking I might head to maplins and get a smaller soldering iron and some flux and just try to reflow the solder - not sure it will work as this is a know problem with the LCM ( the bad transistors ) - but it seems the easiest option.

Its corrosion on hte PCB - the rest of the board looks in decent shape and there is no dampness in the car - getting the LCM out was the easy part for me

If anyone around dublin is decent with a soldering iron and has the time - there would be a few quid in it

whizbang · 16-05-2012, 22:01

voxpop, where are u based. im mobile , maybe can help. BUT:
i have been repairing PCBs for years, but not with corrosion.
just doesnt last. even tiny currents will "grow" the corrosion right inside components .

14-05-2012, 20:08	#17
deandean Registered User Join Date: Apr 2010 Posts: 986 Adverts \| Friends	But beware Voxpop, you can damage components and even the PCB if you start cooking stuff. That soldering iron you are showing might be a 40-Watt; I'd be using a 15W iron there. If you don't have good soldering experience and a suitable size tip on your iron, I suggest you beg a favour from someone who's good at soldering. Reflow is only a 15-minute job; replace transistor maybe 45 minutes. Getting the LCM out of the car, and getting the PCB out of the casing is the hard & time-consuming part. Is that corrosion on the PCB or is it heatsink paste? Quite a few LCMs have failed 'cos of water ingress, water gets in, uh, bulkhead or door seal or somewhere and gets into the module. Check passenger-side footwell carpets are completely dry while you're in there. Hope it all works out for ya The LCM in mine failed on the input side; it was my first fault with the car & I went to a main dealer first they replaced the indicator stalk about €300, then the LCM another €600 (slight reduction after discussions). With hindsight, main dealers only replace stuff. With a car a few years old you want to be able to fix stuff, and that is where online forums & a good indy or two, really shine! Last edited by deandean; 14-05-2012 at 20:16.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

14-05-2012, 23:24	#18
voxpop Registered User Join Date: Sep 2003 Posts: 2,734 Adverts \| Friends	yeah i was thinking I might head to maplins and get a smaller soldering iron and some flux and just try to reflow the solder - not sure it will work as this is a know problem with the LCM ( the bad transistors ) - but it seems the easiest option. Its corrosion on hte PCB - the rest of the board looks in decent shape and there is no dampness in the car - getting the LCM out was the easy part for me If anyone around dublin is decent with a soldering iron and has the time - there would be a few quid in it

16-05-2012, 22:01	#19
whizbang Registered User Join Date: Sep 2009 Location: north wicklow Posts: 554 Adverts \| Friends	voxpop, where are u based. im mobile , maybe can help. BUT: i have been repairing PCBs for years, but not with corrosion. just doesnt last. even tiny currents will "grow" the corrosion right inside components .