Blaupunkt B32A122T - no power

[dick_barton]

Re: Blaupunkt B32A122T - no power

I tested the mosfet with the multimeter.. the basic open close / charge discharge test.

RB148 reads 0.4Ohm

Mosfet is MDF7N60B

When taking the pics for you, i found RB108 to be "funny looking" so i measured it to 8.7kohm (onboard). Should read 22 Ohm am i right??

Thanks for all your time once again!

If RB108 has 223 written on it then it would be 22K ohms. However if it is 222 then it would be 2K2 ohms. Can't quite read what is on the resistor.

What resistance does RB147 have.

[chabregas2k]

Re: Blaupunkt B32A122T - no power

What is the diode number written on it?

SR3200 - Shorted original one.

Ive got here SF50GG and SB5100. Any of these are aceptable replacements?
Otherwise ill have to order... or struggle with the donor pile

[dick_barton]

Re: Blaupunkt B32A122T - no power

The SR3200 is 200V @ 3A so it looks like the SF50GG (400V @ 5A) should work.

[chabregas2k]

Re: Blaupunkt B32A122T - no power

Heres something new....

good thing i have a picture of the "before"
this happened as soon as i flipped the power switch.

[dick_barton]

Re: Blaupunkt B32A122T - no power

CB101 appears to have vapourized. What other component burnt up?
What is the part number for UB101

[chabregas2k]

Re: Blaupunkt B32A122T - no power

Mdp 36r da

[dick_barton]

Re: Blaupunkt B32A122T - no power

The MDP36R looks as though it may be an LD7536RGL which is a PWM controller IC
I would suspect it has been damaged so I would also check the mosfet to see if it's short circuit.

[cheeky2]

Re: Blaupunkt B32A122T - no power

Heres something new....

good thing i have a picture of the "before"
this happened as soon as i flipped the power switch.

I would also check the resistor RB148 circled in white in attached picture as look vaporised in the middle

[dick_barton]

Re: Blaupunkt B32A122T - no power

Also clean the area up with some alcohol and some cotton buds to remove the carbon debris.