See attached.
P16 lists the power supply variants.
P17-21 list the components for the different power supply variants.
No schematics.
P16 lists the power supply variants.
P17-21 list the components for the different power supply variants.
No schematics.
Parts known, placement unsure. No service but directed instead. Starts with the oxymoron "100V, 120V, 230V, Dual Voltage". I never was a fan of this brand.
If both electrolytics are in parallel, no option.120V an no more. But if they are in series, it is too stupid for the manufacturer to put 2 each 250V lytics for 160DCV. I am amost sure that they are using voltage doubler with half diode bridge and the two caps. Thus, cuting out the element that connect the midle point of the caps to line, it no longuer act as s doubler enabling normal bridge diode rectifier and the dual caps in series across 320DCV rectifier.
Bose has been getting their stuff made in China, possibly designed by their contractors.
I think it is too expensive for the quality, it is not as good as expected, they have been accused of using cheap components.
In any case, a step down transformer, or another new supply, can be thought of.
I think it is too expensive for the quality, it is not as good as expected, they have been accused of using cheap components.
In any case, a step down transformer, or another new supply, can be thought of.
Last edited:
Check if there is a (resetable) fuse on board, and check the obvious parts too.
L103 is included now (see post #12), but with thin wires - might be broken.
L103 is included now (see post #12), but with thin wires - might be broken.
Yep there is extra vr103 and vr102 and L103, I don’t no what the last one is that’s different color Ave added photo
Attachments
Professional power tools in the UK run on 110V.
Thus there is a plethora of relatively cheap step down transformers about both new and s/h.
They tend to be bright yellow though.
Thus there is a plethora of relatively cheap step down transformers about both new and s/h.
They tend to be bright yellow though.
The VR's are most likely inrush current limiters (low resistance if not broke), L is a noise supressor (some ohms), so these are not fuses.
Search for pictures of pcb fuses, they come in various shapes and sizes.
Thank you I have mange to get a small transformer but idea was to see if I can change it to 230v the board it self runs on 110 after some of the test done but thank you
Ave tested the board it converting the 230v to 110v on the second hand unit but does not power up the unite so will look for any Outher fuses thank you