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Hello everyone
I need a help to repair Technics SUV90D amplifier.
I'm using a translator, so I apologize in advance if anything is unclear.
The problem is that the amplifier suddenly stopped working. After removing the cover, I noticed a blown fuse. I thought that was the only problem, but after replacing it and turning the amplifier on, resistor R558 started burning (after measurements, it turned out to be good).
After a closer inspection, I noticed that IC 502 was damaged and transistor Q552 had two burnt-out pins.
If I measured correctly, two large power transistors in one of the channels were also damaged.
I'm a beginner in electronics and would like to save this amplifier, so I need help. Please advise which components might still be damaged and help me find replacements for the original components.
The motherboard is currently desoldered.
If anyone can help, I would be grateful for any suggestions.
A few photos and a schematic are attached.
Best regards, Kamil.
I need a help to repair Technics SUV90D amplifier.
I'm using a translator, so I apologize in advance if anything is unclear.
The problem is that the amplifier suddenly stopped working. After removing the cover, I noticed a blown fuse. I thought that was the only problem, but after replacing it and turning the amplifier on, resistor R558 started burning (after measurements, it turned out to be good).
After a closer inspection, I noticed that IC 502 was damaged and transistor Q552 had two burnt-out pins.
If I measured correctly, two large power transistors in one of the channels were also damaged.
I'm a beginner in electronics and would like to save this amplifier, so I need help. Please advise which components might still be damaged and help me find replacements for the original components.
The motherboard is currently desoldered.
If anyone can help, I would be grateful for any suggestions.
A few photos and a schematic are attached.
Best regards, Kamil.
