Hello friends, first sorry for my poor English. I am buy prosub 200 with amplifier faulty (220v model), seller says speaker directly connected rear hi level port and it using as a passive subwoofwer. I am open subwoofer inside and someone or bad repairman try to repair amplifier but not success. Repairman also remove a lot of parts on the board, a lot of parts missing and I need to identify caps resistors mosfets value somehow. Sticker on the amplifier and back plate says "pf12-00745" Can anyone have this amplifier schematics or hi res pictures for repairing my amplifier? More importantly 12" subwoofer measurement is 7.2 ohm (i think 8ohm), is the subwoofer good or damaged.Can anyone confirm what is impedance on this sub? I ask because I read a lot of different impedance online sources (30-36-75ohms even in ebay some seller sell 10" 108ohm subwoofer for def tech) Sorry for my pictures, they are 2mp camera shot.I am working electronic repair bussiness and working a lot of area in electronic (auto car sound and general hotel , club sound systems, industial electronics and hotel equipments )science 1996 , I am work with notebook computers repair right now , I can handle this amplifier repair but I need help for parts and subwoofer impedance correction.
Attachments
From your measurement the speaker is probably ok. Regards repairing the amplifier, I think you will find it hard to identify missing components and even then there may well be more wrong with it. It would almost certainly be cheaper to replace it with a new plate amplifier, or build one yourself, why not? DIY. 😀 good luck🙂
Thanks scottjoplin,😀 I love diy stuff but I have not time to build one lately.I think this option as a last resort. Original amplifier design "hot chassis" "transformerless" design, It is use directly ac 220v to connect bridge rectifier and caps with turn to +170-180V -170-180V. If I am build one later this time I need extra big transformer and I must be figured out how and where the transformer install in the box.If I am not wrong this sub 250w rms 700w peak. Is there good 250w rms 8ohm power amplifier schematic for subwoofers?
- Status
- Not open for further replies.