Good day folks. I had a look at this soundbar from Panasonic today and it seemed like an easy enough fix, but then I got stuck.
Have a look at that fried primary. I reckon the transistor popped and took out the current sense resistors with it before the fuse could open to cut the power. I thought I'd have a hard time figuring out what values those are, as it usually happens when SMD resistors go up in smoke, but thankfully I was able to clean them enough to read 1r60 on there, which is 1.6ohms, so that was sorted - we need 8 of those.
On to the transistor: it's one of those mystery parts that no one's heard of. 14SL70....what could this be ? Ironically, it has a little logo there too, but all searches come out empty. I tried everything, including sourcing a service manual, but that didn't yield any results either....I'm tempted to just dig through my parts bin and pick one out semi-randomly. I'm hoping the control IC survived, because the small passives around it are fine, so I'm hoping something from the FQPF series will work in place of the original one. It claims to be a 120w amp, in case someone wants to suggest something based on past experience, enough to be in the ballpark. As always, thanks for any help. Cheers.
Have a look at that fried primary. I reckon the transistor popped and took out the current sense resistors with it before the fuse could open to cut the power. I thought I'd have a hard time figuring out what values those are, as it usually happens when SMD resistors go up in smoke, but thankfully I was able to clean them enough to read 1r60 on there, which is 1.6ohms, so that was sorted - we need 8 of those.
On to the transistor: it's one of those mystery parts that no one's heard of. 14SL70....what could this be ? Ironically, it has a little logo there too, but all searches come out empty. I tried everything, including sourcing a service manual, but that didn't yield any results either....I'm tempted to just dig through my parts bin and pick one out semi-randomly. I'm hoping the control IC survived, because the small passives around it are fine, so I'm hoping something from the FQPF series will work in place of the original one. It claims to be a 120w amp, in case someone wants to suggest something based on past experience, enough to be in the ballpark. As always, thanks for any help. Cheers.
Attached Files
), since the two 47ohm SMD resistors next to it are open-circuit, so I'm not risking firing it up like this.
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