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Segítséget kérnék a fenti erősítő nem szól, mindene rendben működik, végfok működik, úgy gondolom, hogy az előlapról nem jön ki jel, mintha MUTE áramkör dolgizna, teljesen feltekert hangerőnél nagyon halkan hallanni lehet a hangfalakban a zenét. Szkóppal nézve az előlap és a hozzá csatlakozó panel egyik csatiján sincs hangfrekis jel, ezért gondolom, hogy az előlapon lehet valami. Mi a véleményetek? Előre is köszönöm! 

I greet you! I would need the scheme of this "vintage" amplifier that needs to be "restored". The problem is that in the prefinal and final floor I have many "fried" resistors well, their value cannot be identified.I replaced the defective transistors: 2SC1509, 2SA777,2SB690 and 2SD 796 (each 2 pcs.) and the electrolytic capacitors adjacent to them. I could not go further because of the carbonized resistors that I do not know their value (I can only guess that they are values small, in the order of ohms). The schematic diagram I downloaded, from the address received by the kindness of a colleague is not complete - it is a single page (missing Q29-Q30-Q31-Q3 and resistors R115-R116-R117-R118 which are completely carbonized, at other resistors I could see their value).Thanks in advance!
Finally, I found the missing part

If stuck in the repair and you ask questions, please do it as follows: - Details: Give the exact model number of your device and the chassis ID (if there is). - If possible, please attach pictures of the appliance. - Anamnesis: Write down the exact symptom. If hard to describe the symptom, it is difficult to verbally defined clearly, attach pictures or sound of the phenomenon! - Tell what was you have done so far: search contact error, which parts has examined or changed yet, etc... The incorrectly named topic suspended and will be deleted after 48 hours! Suspended state while others are not able to comment until you correct the address. Subsequent repair of the defective title (within 48 hours) by clicking on the "Edit" tab can be carried out.

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Üdv. Mindenkinek!!
Segítségre lenne szükségem a címben lévő bmw kocsi tuner/audioval kapcsolatban. Az egyik végfok leégett. A tulaj szerint cseréljem valami IC -s re. Mit ajánlotok?
Köszönöm.