9810 question and offer

[robert rozee]

(02-16-2014 07:29 PM)dramsey Wrote:  Cool. Yes, that's the transistor. I will start testing and see what I can come up with.

don't bother removing them from circuit. just use a multimeter set to the diode-check range (if it has one) to find the transistor that in-circuit measures different to the rest. the dud one will be fairly obvious, with a near dead-short between emitter and collector. the next step will be to remove this transistor, reassemble, and test. with the shorted transistor removed the 'stuck' columns should turn into blank columns.

as for replacements, a bc557 (general purpose PNP) is likely to be fine. by the sounds of it the application is nothing special.


cheers,
rob :-)