Resistor question

[selldoor]

Re: Resistor question

As post 23 with picture

[1supertech]

Re: Resistor question

OK I have been repairing monitors for 2 years as a hobby luckily all problem I have encountered, where bad capacitors, EEPROMS, transistors I am self taught by reading
all I can. Yes your right English is not my first language but I have been here 55 years

So basically understanding electronic terms can be a problem.

[1supertech]

Re: Resistor question

As post 23 with picture

Tested as directed 0 volts on each pin and 0 both sides of fuse with meter set on 200 dcv

[selldoor]

Re: Resistor question

Ok - meter should be on 20vdc not 200vdc - you did have it plugged in to the mains ?

[1supertech]

Re: Resistor question

With meter on 20vdc plugged in power socket just with black probe on ground
I get a fluctuated reading of -0.00 thru -.001

While checking all pins with black on ground 1thru 8 is -0.00
fuse -0.00 both sides

On my meter minus is flashing with no power is this normal
I test a 12v battery and show 12v so I assume my multi meter is working
also tested my battery in my millimeter is ok.

[selldoor]

Re: Resistor question

ok back to the start. power board only plugged into mains.
meter on vdc600 very carefully test across the BIG cap.

You have replaced the .39 resistor?

EDIT - perhaps post a picture of your meter with the leads in where you normally have had them

[1supertech]

Re: Resistor question

I only have 300vdc on my meter big cap show 167v didn't replace .39 resistor

[selldoor]

Re: Resistor question

didn't replace .39 resistor

Could well be why it doesnt work

[1supertech]

Re: Resistor question

According to my other posts about resistor.39 which confused me big time I thought it turned out to be good. I guess then I should change it.

[1supertech]

Re: Resistor question

thanks for your patience at Badcaps university. :-)

[selldoor]

Re: Resistor question

Sorry when I said replace I meant put it back on the board

[1supertech]

Re: Resistor question

Oh yes it's back on

[selldoor]

Re: Resistor question

OK have you tested q901 can you read the part number on it?

[1supertech]

Re: Resistor question

Q901 tested good K2645 N channel Mosfet

[Davi.p]

Re: Resistor question

test in ohm R903/4/5

[1supertech]

Re: Resistor question

I don't see a R903 I HAVE Q903

[Davi.p]

Re: Resistor question

in your picture of bottom side, watch in the primary side the small 8pin ic, to the left of it starts a row of 3 smd resistors like a train that goes to 1 pin of the transformer. If you want test also the voltage of the pin of the ic where them goes..

[budm]

Re: Resistor question

From the readings of those 3 devices, it looks to me that they are shorted out and cause the power supply to be in shut down mode, I would all 3 of them off the board and see if the DC will come back.

[1supertech]

Re: Resistor question

From the readings of those 3 devices, it looks to me that they are shorted out and cause the power supply to be in shut down mode, I would all 3 of them off the board and see if the DC will come back.

What three devices are we writing about? sorry

[1supertech]

Re: Resistor question

in your picture of bottom side, watch in the primary side the small 8pin ic, to the left of it starts a row of 3 smd resistors like a train that goes to 1 pin of the transformer. If you want test also the voltage of the pin of the ic where them goes..

Can you direct me on how to test that ic901