Author Topic: Resin dipped axial capacitor identification  (Read 228 times)

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Offline Snake____1

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Resin dipped axial capacitor identification
« on: June 06, 2019, 03:29:02 pm »
Hi everyone,

I have a board in for repair, it's an old style with all through-hole components. I am used to SMD work so the markings on the capacitors were Greek to me.

Does anyone have a link for a deciphering table or know the value of the capacitors attached?
 

Offline capt bullshot

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Re: Resin dipped axial capacitor identification
« Reply #1 on: June 06, 2019, 04:38:09 pm »
I'm slightly confused, but following the standard decoding rule this would be 74 * 10e-1 -> 7.4pF
So it't the 7.4pF that makes me doubt the result since this isn't a standard value.
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Offline PKTKS

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Re: Resin dipped axial capacitor identification
« Reply #2 on: June 06, 2019, 05:07:18 pm »


These form factors appears in devices intermediate from THT to SMT

IN general they CAN BE ANYTHING: RESISTOR/INDUCTOR/CAPACITOR/MOV/NTC

The figure is not showing the silk screen which I GUESS IS "Cxx" something

but even being C the label is not very common and markings are very odd
really they are close to SMD fabs with AXIAL leads...

VHS  systems from 90xx use to have a lot of these... DIODOES/RESISTORS/CAPS

Markings are pretty much the same nightmare of SMD things...
vast majority requires a  considerable time to decipher

Paul
 

Offline Snake____1

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Re: Resin dipped axial capacitor identification
« Reply #3 on: June 06, 2019, 08:06:58 pm »
These have the C107 + C108 etc. markings on the silkscreen. I measured a couple others on the same board, they read out everything from 74nF to 88nF. So deffinatley scratching my head... Are they supposed to be 74nf according to markings?

BTW, thanks for the inputs so far...
 

Offline coromonadalix

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Re: Resin dipped axial capacitor identification
« Reply #4 on: June 06, 2019, 09:04:48 pm »
I would guess a tons of  0.1 uf, in thoses times they did put lots of them,  around your blue 34 pins connector,  they are decoupling caps.

Do you have an lcr meter ?? capacitance meter ??
 

Offline floobydust

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Re: Resin dipped axial capacitor identification
« Reply #5 on: June 06, 2019, 09:29:04 pm »
OMG Q17 was hit by a truck, why are you worried about those capacitors. I doubt they are your problem.
They look like old AVX ceramic capacitors, I thought they have two rows of numbers series and value. Never seen them fail.
Tantalum C76 would be worth checking.
 


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