Author Topic: fat pants question  (Read 1966 times)

chris weaver

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fat pants question
« on: March 03, 2020, 08:15:53 PM »
having trouble with this build, built several over the yrs? My voltage at r7 goes from 9v to .40 ...22r 1/4w resistor... am I losing my mind? am I missing something? after that part seems pretty consistent .40 volts in the build?
A caricature is putting the face of a joke on the body of a truth. Joseph Conrad

madbean

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Re: fat pants question
« Reply #1 on: March 03, 2020, 08:34:13 PM »
Well the first thing I would consider is that you have not used a 22R but something much higher. What's the color code on the resistor you've used?
Alternatively, something with the charge pump could be sinking current.

chris weaver

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Re: fat pants question
« Reply #2 on: March 03, 2020, 08:36:43 PM »
i verified it, red red black gold brown, and i put a new one in for good measure....could it be the zener ?
A caricature is putting the face of a joke on the body of a truth. Joseph Conrad

chris weaver

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Re: fat pants question
« Reply #3 on: March 03, 2020, 09:20:04 PM »
i put a jumper in & got the same reading
A caricature is putting the face of a joke on the body of a truth. Joseph Conrad

madbean

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Re: fat pants question
« Reply #4 on: March 03, 2020, 09:33:34 PM »
post a pic of top and bottom please

chris weaver

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Re: fat pants question
« Reply #5 on: March 03, 2020, 09:46:38 PM »
1
A caricature is putting the face of a joke on the body of a truth. Joseph Conrad

chris weaver

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Re: fat pants question
« Reply #6 on: March 03, 2020, 09:47:05 PM »
2
A caricature is putting the face of a joke on the body of a truth. Joseph Conrad

chris weaver

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Re: fat pants question
« Reply #7 on: March 04, 2020, 03:40:15 PM »
So, I was thinking, maybe I should replace the d1 for giggles. Also perhaps do a continuity test ...maybe there's a bad trace ?
A caricature is putting the face of a joke on the body of a truth. Joseph Conrad

zgrav

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Re: fat pants question
« Reply #8 on: March 05, 2020, 09:44:00 AM »
checking your zener sounds like a good idea.  something is dropping your voltage in that part of the circuit.   what voltage reading are you getting at d5 & c11?

chris weaver

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Re: fat pants question
« Reply #9 on: March 06, 2020, 06:20:52 AM »
.25 & .22...i think the board maybe bad, never got a bad board from bean, but i have from a couple other places. I'm going to order a new one & start over!
A caricature is putting the face of a joke on the body of a truth. Joseph Conrad