Is this really a 540 Ohm resistor? Why is there a completely different share of green printed on it? Like olive green of sort. Am I reading this wrong? Seems wrong for it's application. It is on power supply board input.
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Last edited by FrozenHaxor; 09-06-2019, 12:49 PM. -
Re: Component identification - weird resistor
Looks like 150kΩ post a picture of the board, Is the location marked as R** or L**Last edited by R_J; 09-06-2019, 12:28 PM. -
Re: Component identification - weird resistor
It is R801 so clearly marked as a resistor.
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Re: Component identification - weird resistor
I think it is across the a/c line or to ground, I suspect it is 150k. Is it in a tv? Post a picture of the whole boardLast edited by R_J; 09-06-2019, 12:48 PM.Comment
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Re: Component identification - weird resistor
Yep, traced the mains input and it is across parallel to a MOV. How come if it's 150k it does not match the color bands whatsoever? 150k would be "brown green black orange brown" right? This one is clearly "black green(?) yellow brown green" Which adds up to 540 Ohm.Comment
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Re: Component identification - weird resistor
What does it measure on your ohm meter? or it could be read the other way 51.4MΩ 1%Last edited by R_J; 09-06-2019, 12:53 PM.Comment
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Re: Component identification - weird resistor
It is a 510k 1/2watt will not effect the power supply's operation.Comment
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Re: Component identification - weird resistor
R809 is in series with that spark gap, this is R801 and it is in parallel with a MOV and, a big capacitor and the rest of circuit. Seems to be a part of input RC filter.Last edited by FrozenHaxor; 09-06-2019, 01:08 PM.Comment
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Re: Component identification - weird resistor
I edited my post, here is the diagram of that circuitAttached FilesComment
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Re: Component identification - weird resistor
510kOhm it is then. Why they marked that resistor completely wrong is beyond me. Thanks for the help.Comment
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Re: Component identification - weird resistor
If you read the resistor:
Green (5) 1st digit
Brown(1) 2nd digit
Yellow(5) multiplier
Green (±0.5%) tolerence
Brown (100ppm/°C) temperature coefficient
So what is wrong with the tv/power supply?Last edited by R_J; 09-06-2019, 01:54 PM.Comment
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Re: Component identification - weird resistor
watch your fingers, that resistor is to discharge the polyester caps!Comment
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Re: Component identification - weird resistor
Yeah, decoding it like 4 band resistor works. The fact that it has 5 bands is not typical as it does not decode as a 5 band resistor properly.
Lightning damage, input protection was scorched. New MOV, two 6.3A fuses and this dreaded resistor and we're up and running again.
I thought it's primary function was to form some sort of parallel RC filter at the input, but yeah, it will dissipate charge from that capacitor nicely.Comment
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Re: Component identification - weird resistor
Glad to here it's working, Sometimes its hard to tell with these components, like when the first band on a resistor is black (0), I see this all the timeComment
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Hi
I am trying to repair an ancient Dell 2209WA Monitor which suddenly shut off with a pop sound. On investigation found that one of the fusible resistors had blown. Further investigation identified multiple components as faulty because of which the fusible resistor blew. Please refer the attached circuit diagram showing the components that were found to be damaged.
1. FR950 - blown fusible resistor - 0.2 Ohm 1W
2. Q950 - shorted Q950 MOSFET - 650V 10A N Channel Mosfet
3. R835 - Blown Resistor - 20KOhm SMD resistor
4. D930 - Shorted Schottkey Diode... -
hello, i have the gpu in the title and a resistor fell off that i need help finding the resistance of. does anyone have the schematic or the resistance value? see images below for the one missing....01-02-2025, 08:11 PM -
Hi to all forum members,
Got this faulty 350 watt atx psu dirt cheap from a local online seller as i am keen to use it as a learning tool to repair faulty power supply.
The faulty part is quite obvious from the burn area near the 16pin KA7500 BD pwm. The fuse is still intact with good continuity.
Upon power on ac, there is 5vdc standby power on cathode of diode D14 and about 10vdc on cathode of diode D13.(This should be the aux power to generate the 12v and 5v rail.)
Initially i replace the two burned resistors near my marked red arrow to 200 ohm resistor... -
I have a Dick Smith 37" LCD TV, Model GE6804. I am using it as PC extended monitor only.
Problem is while watching tv, I hear a semi loud click(like a electrical breaker tripping due to overload, just sound like it but no actual electrical overload), then screen is covered with green or pink. I can still see the original picture image but overlayed by green or pink. See attached images. Pink.jpg is what I see, and Normal.jpg is before green or pink screen, What I captured was pink screen, but about 80% of time it's green and 20% of time it's pink.
Then each time... -
I am curious if a 0402 resistor could go from 43 ohm to 0. In electronics class and my experience a resistor can degrade and gain resistance all the way up to not being able to conduct at all. I have never heard of a resistor decreasing in resistance and becoming 0 ohm or a dead short… that's not the direction they fail… or so I thought.
I was attempting to remove a wson8 chip on an iMac motherboard and it required a lot of heat, on one side of the chip were 3 0402 resistors that were very close. I popped the chip out unintentionally out of the tweezers and sent those resistors...
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