So I'm repairing this "Breman" car radio, havent found any schematics on it, I reverse engineered the AM/FM tuner, made a schematic.
at first the radio worked fine, after replacing the electrolytic capacitors (only 3, one for power supply, one for the AM, and one for AGC), I have checked multiple times and the capacitors are the correct value, polarity, and the correct place. and now it's not working correctly.
the problem is that it cuts out when its tuned to a strong station, if I dont tune it right on the peak it works, I tried shorting the AGC line of the BA4236 to ground, and that only made it more distorted (which it shouldnt do anything anyway since that's only for AM it seems)
I tried shorting the junction of 2 220k's and 47nF capacitor to ground, applying AGC to FM, and that didnt help either.
if I detune T1, it doesnt cut out anymore, but sensitivity is much worse, so I suspect it's just because it looses sensitivity...
the output of it also is really really weak, I crank the volume and it can be outpowered with just regular talking easilly.
AM totally doesnt work, but I dont have many AM stations around here anyway, so not suprised it's not picking up any, but there's almost no static when on AM, so if it's working, it's not very sensitive for sure.
I dont have a signal generator that I could use to properly adjust the tuner, but I hope to at least fix the cutting out issue, what do you think could be the problem?..
schematic: (sorry if it's a bit hard to read

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