Hi everybody.
I'm trying to fix this toothbrush that doesn't wanna start. And I need your help.
Just to inform you that I'm supperbeginner
First photos are from internet because I did not took a photo of whole board.
I have noticed that fuse marked with "E" near the battery pole is bad and decided to short it with a "proper calibrated wire" as one would say.
Now, when I apply 1V from the power supply, limited to 500mA, one of the component stick out from the rosin mist. CHC N2AB (or some variation of that letters) is the hottest component. I managed to find no details for component with this marking.
I started testing surrounding components and all seem okay except, I presume, a diode marked with letter "A". I can't get constant reading from it, not in diode mode, not with the ohm reading. Its all over the place. Just like my English.
Can someone help me identify these components?
Measuring with my smd ruler, from all diode packages, diode is best placed at sod523 pads. Thing that confuses me is that when I checked dimensions for sod523 package, dimensions do not align up. My suspicious diode is physically much larger. Dimensions measured with caliper are 2,0 x 1,2mm. Pads are 0,6mm long with 0,8mm clearance between them. Maybe the 0805 package is much better fit, but I do not know are diodes comes in this format? Is this even a diode? Is my ruler maybe bad?
Sorry for many questions and thanks guys
I'm trying to fix this toothbrush that doesn't wanna start. And I need your help.
Just to inform you that I'm supperbeginner
First photos are from internet because I did not took a photo of whole board.
I have noticed that fuse marked with "E" near the battery pole is bad and decided to short it with a "proper calibrated wire" as one would say.
Now, when I apply 1V from the power supply, limited to 500mA, one of the component stick out from the rosin mist. CHC N2AB (or some variation of that letters) is the hottest component. I managed to find no details for component with this marking.
I started testing surrounding components and all seem okay except, I presume, a diode marked with letter "A". I can't get constant reading from it, not in diode mode, not with the ohm reading. Its all over the place. Just like my English.
Can someone help me identify these components?
Measuring with my smd ruler, from all diode packages, diode is best placed at sod523 pads. Thing that confuses me is that when I checked dimensions for sod523 package, dimensions do not align up. My suspicious diode is physically much larger. Dimensions measured with caliper are 2,0 x 1,2mm. Pads are 0,6mm long with 0,8mm clearance between them. Maybe the 0805 package is much better fit, but I do not know are diodes comes in this format? Is this even a diode? Is my ruler maybe bad?
Sorry for many questions and thanks guys