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Old 10-12-2021, 09:48 AM   #1
jimbofz
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Join Date: Apr 2013
City & State: cheshire
My Country: uk
I'm a: Knowledge Seeker
Posts: 287
Default roberts dab mpsound 43 circuit

Hi ive searched internet for cct diagram of sound o/p stage using TPA3100D2 ic.no luck

in manufacture they pour hot melt glue over the top to secure the inadequate heatsink .problem is it carbonises and when removing (carefully),to expose the pins of this 48 pin ic some of the very small surface mount components come off with the goo..
some sony tvs use this ic kdl3500 model .their cct leaves me puzzled as many external components are completely different .
the sound via headphones is fine as it uses separate 8 pin ic
theres sound going into the tpa chip and all supplies ok ,but not a peep of sound replacing this minature ic would be a chalenge as a number of close components would have to be removed to gain acess with solder station
has anyone done battle with one of these ?or any other brand that may use the same ic? roberts technical is a joke ,no help at all .the sound on these is very good when working ok ,so its worth my time trying to repair. thanks
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