Philips AJL308/37 Alarm Clock Radio LCD Photo Frame

[ntehicks]

I have this clock radio that had died on me. My wife loves this thing and I guess they don't make it anymore. I would like to see if I can fix it. I have tested the power adapter and it tests normal 9 volts 1 amp. the unit was working and then all of a sudden no more screen nothing. I have opened the unit and have taken pictures of the board.

[budm]

Re: Philips AJL308/37 Alarm Clock Radio LCD Photo Frame

Can you please also show the pictures of the whole board, top and bottom side?

[budm]

Re: Philips AJL308/37 Alarm Clock Radio LCD Photo Frame

https://www.badcaps.net/forum/attach...3&d=1458359405

So the fuse F1 checked OK and had DCV at both ends of the fuse with ref to GND?
BTW, the adapter is 9V AC? DC?

[ntehicks]

Re: Philips AJL308/37 Alarm Clock Radio LCD Photo Frame

The adapter is 9vdc and I am getting 9.7 at both ends of the fuse

[budm]

Re: Philips AJL308/37 Alarm Clock Radio LCD Photo Frame

Then you will need to trace out to see how the DC is being distributed after the fuse.
We still need good clear pictures of the whole board, both top and bottom side.
And how many Voltage regulator ICs are there on the board?

[ntehicks]

Re: Philips AJL308/37 Alarm Clock Radio LCD Photo Frame

here are the pictures you requested

[budm]

Re: Philips AJL308/37 Alarm Clock Radio LCD Photo Frame

So it has one small backlights inverter circuit, but you still get sound from the radio but you just do not see anything on the screen, right? That way we can narrow down to just bad backlights or the whole unit is dead.
It looks like it has lots of switching power supplies on that board.

U22, 23 Linear regulators
U12 is the amplifiers
L2, D2 are part of the buck switching power supply.
U25 power MOSFETs for the inverter transformer.

[ntehicks]

Re: Philips AJL308/37 Alarm Clock Radio LCD Photo Frame

there is no sound or anything.

[budm]

Re: Philips AJL308/37 Alarm Clock Radio LCD Photo Frame

So do you get any DCV at the linear regulator pins at all?
Do you also get DCV at both end of D3 with ref to GND?
DCV at U12 pins?

[CapLeaker]

Re: Philips AJL308/37 Alarm Clock Radio LCD Photo Frame

Did you try a different PSU? Only because it is putting out 9V, it doesn't mean it can deliver 1A.

[Alzari]

Re: Philips AJL308/37 Alarm Clock Radio LCD Photo Frame

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[Alzari]

Re: Philips AJL308/37 Alarm Clock Radio LCD Photo Frame

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.Implicit USB and SD card openings let you store all of your photographs, music and video cuts. You can appreciate music or radio channels with FM advanced auto tuning.