wrd@tekigm2.TEK.COM (Bill Dippert) (01/15/87)
Recently Richard Andrews answered how to hget chroma out on the 1200XL, however, as I asked him: Appreciated your answer. However, one slight problem -- not being an electronic engineer, I do know which is the emitter of Q7 on the 1200XL. Having a spare mother board in front of me, I see that: the left hand leg goes to C61 (? -- 1 is covered by component) the middle leg goes to R31 the right hand leg goes to R43 Question: which leg is the emitter? If anyone else on the net has the answer, please post it. I have previously posted similar answers, but have tried to keep the answers in terms that even I can understand -- then I figure anyone can do it. Since the circuit board has all components labelled, it is a fairly easy task to trace out each leg to see where it goes, but to determine whether it is the emitter or not (particularly - as I understand it - these transistors do not have a standard configuration). If I get an answer, I will post it, as Richard and I cannot be the only ones using 1200XL's! --Bill Dippert--
cabbie@chinet.UUCP (01/26/87)
In article <1375@tekigm2.TEK.COM> wrd@tekigm2.UUCP (Bill Dippert) writes:
/Recently Richard Andrews answered how to hget chroma out on the 1200XL,
/however, as I asked him:
/
/Appreciated your answer. However, one slight problem -- not being an
/electronic engineer, I do know which is the emitter of Q7 on the 1200XL.
/Having a spare mother board in front of me, I see that:
/
/the left hand leg goes to C61 (? -- 1 is covered by component)
/the middle leg goes to R31
/the right hand leg goes to R43
/
/Question: which leg is the emitter?
/
/If anyone else on the net has the answer, please post it. I have previously
/posted similar answers, but have tried to keep the answers in terms that even
/I can understand -- then I figure anyone can do it. Since the circuit board
/has all components labelled, it is a fairly easy task to trace out each leg to
/see where it goes, but to determine whether it is the emitter or not
/(particularly - as I understand it - these transistors do not have a standard
/configuration). If I get an answer, I will post it, as Richard and I cannot be
/the only ones using 1200XL's!
/
/--Bill Dippert--
i hope this clarifies the situation...
___
\_/
^^^
EBC
transistor bottom view
or in other words as viewed with the flat side toward you with the leads
pointing downward the far left lead is the emitter the middle leg is the
base and the right lead is the collector.
--
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Any opinions expressed above are my own. Rich Andrews
They can be yours too. Please send $19.95 to.....ihnp4!chinet!cabbie
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