23 Apr
2009
23 Apr
'09
4:25 a.m.
On Thu, 2009-04-23 at 22:25 +1200, Mike van Bokhoven wrote:
Good idea - my description there did go a bit awry; I meant to write
something along the lines of 'if the transistor isn't obviously
faulty...'. Another thing I'll have to remember how to do, I haven't
tested a transistor since maybe 1990. Oh well. I'll try to refresh my
memory tomorrow. Don't forget that an interest in classic computers and
an ability to puzzle through simple schematics doesn't necessarily mean
someone knows one end of a transistor from the other!
Also, replacing the transistor was something I intentionally left out of
my earlier mail - the part number is 60304e, both on the schematic and
the component. Google doesn't know what to do with that, and neither do
I. Hopefully there will be a close-enough alternative. Does it sound
familiar to anyone?
Mike
3 - How can I
check? Could I pull the 5.6K resistor and the suspect
transistor, replace the resistor with a 5K pot set to 5k initially, and
wind the pot down a little, see if the picture comes back in some form?
Good idea, or misguided?
You could test the transistor, or even replace it.
Gordon