Hi there guys,
Got a Focal FPS 4160 laying here, where I'm struggling on for a couple months now.
The amplifier is making a lower amplitude but clear sound at CH2 on the speaker output.
I checked the output of the filter circuit and the sine wave amplitude is excactly the same which is going to the input of the driver board. So, both driver boards (CH1 and CH2) has the same input sine wave amplitude.
The output of the driver board from CH2 has a weaker sine wave amplitude.
I checked and compared all resistors from the driver boards, measured the transistors and diodes, but I could not find a difference in readings between both driver boards.
Does anybody had the same problem? Or somebody knows how to fix this?
Attached are the schematics of CH2 from the driver board input to the speaker output.
Q11, R1, R14, R20, R13 reads OK
Got a Focal FPS 4160 laying here, where I'm struggling on for a couple months now.
The amplifier is making a lower amplitude but clear sound at CH2 on the speaker output.
I checked the output of the filter circuit and the sine wave amplitude is excactly the same which is going to the input of the driver board. So, both driver boards (CH1 and CH2) has the same input sine wave amplitude.
The output of the driver board from CH2 has a weaker sine wave amplitude.
I checked and compared all resistors from the driver boards, measured the transistors and diodes, but I could not find a difference in readings between both driver boards.
Does anybody had the same problem? Or somebody knows how to fix this?
Attached are the schematics of CH2 from the driver board input to the speaker output.
Q11, R1, R14, R20, R13 reads OK
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