Plz help id this component or an substitute.  - Page 1
Forum section: electronics / beginners

author: homus
author_rank: Newbie
timestamp: February 11, 2015, 07:29:54 am
content: I recently finished my training as electronics technician in DK. (4 years)I can’t find this (picture) component on Google. It says "pec ami 152 6482" on top. Can someone tell me what it is and if it is still in production. Maybe help identity an alternative.It’s from a Logitech Z-5500 Digital surround sound system. I believe it’s from the PSU part of the system.Any feedback is welcome.From Henrik HansenPS. I love the channel. Just like anyone else here. Just had to say it

author: Codemonkey
author_rank: Regular Contributor
timestamp: February 11, 2015, 07:34:25 am
content: Its a bridge rectifier. If you know the working voltage and current it should be easy enough to find a replacement. I'm guessing that one will be rated at about 1A but not sure.

author: LA7SJA
author_rank: Regular Contributor
timestamp: February 11, 2015, 08:03:23 am
content: Trythispart, it should do the trick.JFG

author: radiomog
author_rank: Regular Contributor
timestamp: February 11, 2015, 08:04:53 am
content: interesting, I knew about the smoke inside parts, but didn't know that rectifiers had cheese inside!

author: homus
author_rank: Newbie
timestamp: February 11, 2015, 10:41:26 am
content: Cheers ill give it a try.The cheese is in fact glue. Everything is glued. I think its to minimize noise

author: picandmix
author_rank: Frequent Contributor
timestamp: February 11, 2015, 11:30:22 am
content: Yes, it looks like a 1A+ diode block, but seen many rectifiers burn out like this due to either the device running too hot because of poor ventilation or too much current running though though it, so better to buy a slightly bigger device say 2 or 3 amp rating and perhaps even put a small heatsink on it or bolt it to the chassis if a metal one.The other reason for failure is heat /current on the soldered joints making them go dry and burning the pcb like that.You need to ensure you clean back to sound tracks and lay down some copper wire if needed to beef up the remaining track work.

author: PA0PBZ
author_rank: Super Contributor
timestamp: February 11, 2015, 11:48:06 am
content: It's not ami 52 but AM152, 1.5A 200VEdit: As LA7SJA already pointed out.

author: Ian.M
author_rank: Super Contributor
timestamp: February 11, 2015, 12:11:00 pm
content: I doubt it needs a 200V rating though. Remove it, measure the RMS voltage at its AC terminals and double that to get a reasonable minimum voltage rating for a possible replacement.The problem with higher current replacements is the legs tend to be thicker. A slight increase in diameter can usually be accommodated on single sided PCBs by very carefully drilling out the holes, but you certainly don't want to be trying to fit a 5A bridge there.The next question is why did it fail? It is quite possible there is a short or partial short downstream of it, so bring it up slowly on a Variac with an Ammeter in series with the bridge output and cut the power if the current goes much over 1A.

author: jlmoon
author_rank: Unknown
timestamp: February 11, 2015, 04:00:39 pm
content: Quote from: radiomog on February 11, 2015, 08:04:53 amIf I only had some chips and hawt sauce.. I would be set!!!

author: 22swg
author_rank: Frequent Contributor
timestamp: February 11, 2015, 04:16:12 pm
content: The cheese could be from the electrolytic capacitor next to rectifier , something has melted ? check it for a short

author: SeanB
author_rank: Super Contributor
timestamp: February 11, 2015, 06:26:30 pm
content: When mounting the new one space it above the board preferably by at least the diameter, so it can get cooling air around it and run cooler. check as well for shorted outputs from it, or for failed capacitors near it . those little ceramic capacitors across the pins are also suspect, they can go short circuit and blow the bridge rectifier.

author: rdl
author_rank: Super Contributor
timestamp: February 11, 2015, 07:24:20 pm
content: It's possible to replace bridge rectifiers such as those with individual diodes. Check out this "excellent" repair I found inside an HP E3610A that I bought off eBay.CR9 is actually supposed to be a bridge rectifier in one of those 8 pin size (with only 4 pins) DIP packages.

author: GreyWoolfe
author_rank: Unknown
timestamp: February 11, 2015, 07:54:54 pm
content: Quote from: radiomog on February 11, 2015, 08:04:53 amDoes kind of look like burnt Velveeta or cheese whiz. Add a little salsa and chips and some cervesa, Dos XX! stay thirsty, my friends.