Hi guys, I have a Bose Soundtouch 30 to repair and I am stuck. I have 320V from the PSU to the mainboard, 24V on the amplifier, 5V and 3.2V, but pushing the power button, It is not powering on. I found a chip that it is heating when i plug the speaker in the outlet, but i can not find anything about the chip - C4E smd 8pin chip. It is anyone with some experience on this type of Bose to help me with some ways to find the problem? Thanks
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Here is the sketch with the IC. Injecting 3.3V to 0V pins, i have 0.03A drawn from the power supply. for me is a litle high curent.
Also, injecting 5V to 7 and 8 pins, the IC is getting hot instantly. with a lower voltage the IC still get hot, but not so much
Any ideas? Thanks -
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Hi guys I'm checking an identical product but I can't find any test points anywhere to check and understand which board has problems.
Do you have any references to do some checks? the problem is that it doesn't turn on, but as soon as I insert the power supply I hear a low buzz from the switching circuit so I think it's active.
On the board with the lan port I have 310V in dc but on the 74HC02 integrated circuits between pins 7 and 14 I have 0V.
can you help me?Comment
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