test y buffer for short? part# ebr38447802

[shelby5041]

Re: test y buffer for short? part# ebr38447802

beep/reading same thing

yes i have done this and i get a reading/beep when i run along pins on connector s for ribbon calbes '


one probe on ground and one probe on connector pins.........and i get readings on various pins so this means shorted????

[sordids999]

Re: test y buffer for short? part# ebr38447802

have you watched toms video?
you will here a beep once you run your multi meter along the pins which will highlight that you have a shorted buffer

[shelby5041]

Re: test y buffer for short? part# ebr38447802

i also used diode mode and probed 5v pin and then other probe on ground pin and i get a reading which means shorted correct???

[shelby5041]

Re: test y buffer for short? part# ebr38447802

yes i tried that and i also get readings which means shorted.......i put probe on any 1 of the input voltage pins and then other probe ran across each of the 4 ribbon cable connector pins and i do get readings.........

i jsut want to verify if this works on all y buffers and not jut certain ones

i bought it on ebay and need to verify board is shorted for a refund

thanks

[finntricky]

Re: test y buffer for short? part# ebr38447802

https://www.youtube.com/watch?v=51SZ...Y&noredirect=1
try that

[shelby5041]

Re: test y buffer for short? part# ebr38447802

can anyone very how to tedt short on y buffer....i tried srtting to diode...then one prob on floating ground pad and other probe running across all pins on each ribbon cable connector and i keep getting readings on the top connectors which means shorted?....or am i doing something wrong?

[mmartell]

Re: test y buffer for short? part# ebr38447802

On some sets the signal cascades from top buffer to bottom. So short on upper means no pic because signal is not making it to the bottom buffer. And if top buffer not installed but good bottom buffer installed still no pic for same reason.

[shelby5041]

Re: test y buffer for short? part# ebr38447802

if upper is shorted and lower not.....wouldny i get a pic on bottom screen and if upper is shortrd why isnt top half screen black?

[shelby5041]

Re: test y buffer for short? part# ebr38447802

i touched floating ground pad where screw goes then ran other probe alone each cable connector and on the last connector it had shorts....the connector where panel ribbon cable goes....there are 4 connectors.......this kind of backs up my tezy i did 4yrs ago the uppers were bad using a diff test ...coppell tv .....but the upper i got from shop jimmy is now appears to be shorted

[tw2005]

Re: test y buffer for short? part# ebr38447802

ok doing that test upper buffer is shorted on one of the cable connectors...even the one i bought from shop jimmy and all are shorted on same connector location

What do you mean on the same cable connector location? any chance a photo of how you did the test or of the bad connector?

[shelby5041]

Re: test y buffer for short? part# ebr38447802

ok doing that test upper buffer is shorted on one of the cable connectors...even the one i bought from shop jimmy and all are shorted on same connector location

[tw2005]

Re: test y buffer for short? part# ebr38447802

Ok, unusual to start a new thread? but try setting the meter to diode/continuity, place one on the Vfg points where the screws would go and then slide the other probe slowly across the pin contacts for the panel ribbons and see if it shows short or constant beep.

[shelby5041]

Re: test y buffer for short? part# ebr38447802

i did some research and saw some mentioning of the round copper pads and using diode test but that was for a diff part#,,,so not sure what do do here..any help would be appreciated

[shelby5041]

was wondering if anyone could provide me with an easy way to test this y buffer for short

i have attached a photo

i do have a DVM

thank you