Cap upgrade Conion c100f then not working

[keeney123]

Started new thread after upgrading Boombox. This is what happens if one does not recheck all the capacitor value and direction before powering it up. Last year I did this and found a capacitor in backwards in the output amplifier circuit to the speakers.

Also, I want to ask caution where is the ground screw in the back panel as I cannot find one? Never mind I found it. Need to put glasses on. The black twist on knob. Looking fo a actual screw. My mistake.

Anyway, I have opened the unit and attached a picture of the open unit.

 

[keeney123]

Finished amp board. Found two other caps backwards and one cap wrong value. Replaced them with new caps. Have attached top and bottom side picture of amp board. Upper right-hand corner is c233 which is not on the capacitor sheet. I believe it is a 47uF 10 v. Will have to verify on the schematic.

 

[Tinman]

Yep, you have to double check everything as you go or you end up doing what you're doing, which blows.
Not all boards are the same, some highlight the positive leg and others the negative leg.
You can draw a picture of the way that particular box signifies positive and negative so you have a reference as you go.
I've done numerous boomboxes and just did a clock radio yesterday that only had about 20 caps.
I still double checked every one as I went.
When I did a box, I'd do one board at a time and write down every cap's value and put a mark on top of it after it's written down.
I lay my caps out from smallest to greatest value.
I keep a magnifying glass nearby also, just in case I question something (is it 47 or 4.7).
It can get confusing.

 

[caution]

Yeah, C233 is 47uF @10V. It's part of the alarm's voltage regulator circuit, dampening inrush current and ensures Q203 gets a steady voltage. It also creates an RC filter with R235, providing ripple rejection (main power comes in on the other side of R235)