Haha, yeah, I¡¯m thinking the same thing. I¡¯ve kept my B3, C3 (x2) and A100 running for 20 years but solid state stuff is new to me. I¡¯d hate to junk this but that may be the play here. I¡¯be taken the Leslie unit out to access the boards. The Leslie was functioning alright ie it was firing up and spinning properly so I guess someone will probably want it.?
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On Dec 7, 2024, at 3:49 PM, Chris Clifton via groups.io <clifton.christopher@...> wrote:
?
Pin 17 and the collector of Q604 should be 25 volts DC (not AC!)
when measured with the negative lead of the meter to ground (any
point on the chassis) and positive to the point where you're
measuring. It should never be an AC voltage, and certainly not 60
volts. Voltages around all the transistors should in the first
instance be measured as DC voltages.
To be honest, I'm beginning to wonder if you've bitten off more
than you can chew with this. From your comments, you appear to
have no understanding of what we are trying to do here. I can't
teach you all you need to know by email.
On 07/12/2024 17:56, Ned Lucas via
groups.io wrote:
Well, just looking at the voltages at Q604 (the transistor with
the heat sink),?
Pin #17 (which should be the Collector voltage of +25vac) I¡¯m
reading +60vac. ?When I put the positive probe on the C leg and
the negative probe on the chassis I read 0 vac.?
On the Base and Emittor, I¡¯m reading 0 vac.?
On Dec 7, 2024, at 9:05 AM, Ned Lucas
via groups.io <nedlucas@...>
wrote:
?
Thank you so much!
On Dec 7, 2024, at 4:31 AM,
Christoph via groups.io
<kuku@...> wrote:
?
Oh, typos:
unfortunately. I just wanted
Am 07.12.2024 um 10:22 schrieb
Christoph via
<
kuku@...>:
Ned,
did you check the power supply
voltages ??
Funnily, the other day I was able to
download?
the T-500 Service manual from?.
Unfotunately I forgot to download
part II, which contains most of the circuit
diagrams. I kusted wanted to lookup the points
where to measure the 15 and 35V.
unfortunately. I just wanted ... ?15 and 25V
When I try to dowload it now I¡®m
getting
?Item not available due to issues
with theitem¡®s content¡° Anyone knowing an
alternate source?
¡ª
Christoph?
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