DML4000a

[trean27]

Hi,
I had a accident and blew my dlm4000a board,
I replaced the irs2013s and the hef40001bg
and a couple of 1n4148.
Now i got signal after the dil4060b
at R19 on my scematic,
and strong signal att Q1 AND Q2.
but i got no signal at R14 and R15.
I reversed engineered this , maybe somewhere theres an error or wrong values.but main thing is there is no audio out.
I got the the right voltages like +VEE18 and so on.
Any one know what to expect out of dli4060 and how the signal get to the hef40001b, I tried to se a connection and measure, but missing something here.
any ides is helpful.

maybe someone had a replacement board, with other type of chips, when dli4060b is only on aliexpress.......

 

[Perry Babin]

I would expect pin 6 of the optocoupler to drive one pin of the 14001.

R19?

 

[trean27]

Thanks Perry, i will check tomorrow to confiirm, and i dont have R19 on my scematic,
just so wiered, i cant see the connection with audio to the Hef and then to irs2013s Lin and Hin..

 

[trean27]

dlm4000a.

Hei,
i double checked and you right,

i edited the scematic.


The collector leg of the optocoupler goes up to the hef40001 so makes more sense.

i checked and i have
audio at the legs of the transistors q1 and q2.
so I will replace the optocoupler and ordered new 14001 .

I read that the sound goes through dli4060 and though the optocoupler to the 14001, then goes to irs2013.

 

[trean27]

dlm4000a

new circuit.