Alarm unit repair

DT19 · May 23rd, 2016, 20:18

I've had a replacement alarm unit on my shopping list for a year now and every time my local scrappy get a Volvo V70/S60 in I call in only to find someone has beaten me to it. Today I went looking for something else and found not one, but two alarm units.

I've opened them up and the first one was full of water and the board is black so I think it's safe to say that one is goosed. The other one has been warm around a couple of components and I'm planning to clean it up a bit and have a closer look. I can trace a repair damaged tracks but I'm not up to date with the components so if anyone can help identify them that would be great.

What does the panel consider the chances of success?

stellamon · May 24th, 2016, 16:18

All I've found is this picture, I think its a V70 alarm pcb

DT19 · May 24th, 2016, 16:56

Ah that's better. So the components I need to identify are labelled D1 and D3 in that picture.

Neil_ · May 24th, 2016, 22:25

Oh my word, now I know what I'm going to find if I ever get round to opening up the alarms on my cars!

D5meister · May 24th, 2016, 22:39

your diodes are ok.

the black is the denatured green resist plus copper oxide.

The alarms do not have water in.

The liquid is from the failed battery pack.

It is nasty corrosive stuff.

Clean off oll of it and when tested if working paint the board with a bit of laquer

DT19 · May 25th, 2016, 00:01

Ah, so the D of D1 and D3 refers to Diode, is that right? The board I'm tinkering with is in the top post not the nice clean one in the second post. The other unit I opened was the one I thought had water in it. What came out was like half a cup of coffee but I did wonder how it had got in there, just shows how much stuff those batteries contain.

May 23rd, 2016, 20:18	#1
DT19 Master Member Last Online: Yesterday 20:48 Join Date: Feb 2014 Location: York	Alarm unit repair I've had a replacement alarm unit on my shopping list for a year now and every time my local scrappy get a Volvo V70/S60 in I call in only to find someone has beaten me to it. Today I went looking for something else and found not one, but two alarm units. I've opened them up and the first one was full of water and the board is black so I think it's safe to say that one is goosed. The other one has been warm around a couple of components and I'm planning to clean it up a bit and have a closer look. I can trace a repair damaged tracks but I'm not up to date with the components so if anyone can help identify them that would be great. What does the panel consider the chances of success?

May 24th, 2016, 16:18	#2
stellamon Member Last Online: Nov 24th, 2019 15:41 Join Date: Oct 2015 Location: shrewsbury	All I've found is this picture, I think its a V70 alarm pcb __________________ V70 T5 SE Auto 2004 Whale Oil Beef Hooked

May 24th, 2016, 22:25	#4
Neil_ Member Last Online: Apr 27th, 2024 09:06 Join Date: Aug 2007 Location: Under the car	Oh my word, now I know what I'm going to find if I ever get round to opening up the alarms on my cars! __________________ Current XC90 3.2 MY56, C70 T5 MY53, S60 2.0T MY02 Previous 940 2.0 MY95, XC90 2.5T MY05

May 24th, 2016, 16:56	#3
DT19 Master Member Last Online: Yesterday 20:48 Join Date: Feb 2014 Location: York	Ah that's better. So the components I need to identify are labelled D1 and D3 in that picture.

May 24th, 2016, 22:39	#5
D5meister Premier Member Last Online: Feb 10th, 2024 19:13 Join Date: Nov 2008 Location: Huntingdon	your diodes are ok. the black is the denatured green resist plus copper oxide. The alarms do not have water in. The liquid is from the failed battery pack. It is nasty corrosive stuff. Clean off oll of it and when tested if working paint the board with a bit of laquer

May 25th, 2016, 00:01	#6
DT19 Master Member Last Online: Yesterday 20:48 Join Date: Feb 2014 Location: York	Ah, so the D of D1 and D3 refers to Diode, is that right? The board I'm tinkering with is in the top post not the nice clean one in the second post. The other unit I opened was the one I thought had water in it. What came out was like half a cup of coffee but I did wonder how it had got in there, just shows how much stuff those batteries contain.

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