OH BOY ! . . . . . now we's done gots ourselves
TWO players in the game . . . .
As for your seeing the (KBU2510) in the power supply aspect of the board, its not being used in the common manner in which you would expect.
I initially submitted a goldmine of info on my initial drawing of that unit and also saw the additional need for explaining the minor power supply , powering the brains of that unit, so I also submitted a marked up application note of the IC used in that unit along with its 3 output supply legs.
waybel . . .That flat pack being a TL431 precision shunt regulator really surprised me, as I always am seeing them in the conventional plastic, 3 leg TO-92 transistor casing.
GILVERWEY67
Additionally submitted . . . herewith, is that KBU2510, used as a FW bridge rectifier on top and then the bottom current application.
View attachment 57221
Look at that motors voltage / current specs, versus its horsie powders, and expect this VFD board to have the need of an available 8 amps of rectifiers and a max of 180 VDC + and - supplies, and that will be pulling down that peak voltage under mechanical loading.
Above on FWB you are using A&C diodes and B&D diodes to get your separate negative and positive leads.
Just below it , you are coming in with HOT AC line into paired BC diodes and paired B&D and A &C diodes will then get you two supplies as being referenced to the bottom common neutral AC line.
You can plainly see the +180 V supply with its + lead from the rectifier being connected to the top foil of the PCB and is traveling across the frontal foreground and connecting into the two closest 1000/200 E caps to take a foil path over to the right and enter into the center left side of the large frontal corner
" CUSTOM POWER IC Cluster ".
Unfortunately the other top - terminal of the rectifier enters into a like foil path on the back / bottom side of the PCB where we can't see it as readily.
It should also go into that
" CUSTOM POWER IC Cluster " from the bottom / other side.
I will be back to have one of you use an ohmmeter to see the validity / inter continuity of my A_B_C_D, etc markups, I have added.
Tell me about the RT-2 failure, as that is designed in its circuitry , for the initial huge surge cushioning of the 4000ufd of E caps getting charged up to 180VDC.
As for the other mini RT-1 thermistor . . . . TREAT IT / THEM WITH KID GLOVES !
I see it as it being the KEY for the operation of that mini supply's raw DC voltage source.
¿ SOMEHOW ?
waybel is professing of knowing its actual part # and value.
However, EVERYBODY should know the specs of
RT-2.
Thaaaaaaassssit . . . . . . for this time.
73's de Edd . . . . . .
You have two parts of the brain, “left” and “right”
in the left side, there’s nothing right,
and in the right side, there’s nothing left.
.