Nope no sockets anywhere on this unit. I checked the u4269 and no luck.
Good news is that it isn't loose;)
On Fri, Dec 5, 2014 at 8:18 PM, Jim Popwell jpopwell@... [TekScopes] <
TekScopes@...> wrote:
locate u4269 a dual in line pkg right next to the 85,86,87,88 test
points¡.if it¡¯s in a socket wiggle it¡..
On Dec 5, 2014, at 8:11 PM, Kevin Crossett kcrossett@...
[TekScopes] <TekScopes@...> wrote:
It just shifts the display slightly. Does in XY and in normal mode.
On Fri, Dec 5, 2014 at 8:08 PM, Jim Popwell jpopwell@... <mailto:
jpopwell@...> [TekScopes] <
TekScopes@... <mailto:TekScopes@...>> wrote:
when you press the BEAM FINDER button ¡.does it have any effect on the
display, if so what???
On Dec 5, 2014, at 7:58 PM, Kevin Crossett kcrossett@...
[TekScopes] <TekScopes@...> wrote:
Hi Jim. The symptoms do still exist when I press the 10x mag button.
On Fri, Dec 5, 2014 at 7:56 PM, Jim Popwell jpopwell@...
<mailto:
jpopwell@...> [TekScopes] <
TekScopes@... <mailto:TekScopes@...>> wrote:
one other thought¡. push in the X10 mag button and see if your
original
symptoms still exist¡..
jim
On Dec 5, 2014, at 6:46 PM, Kevin Crossett kcrossett@...
[TekScopes] <TekScopes@...> wrote:
OK. So I made the measurements on the test points as directed by
Albert.
I
have not checked the transistors because I'm still not sure the
best
way
to
do so. I also checked the wires to the deflector plates, and they
seem to
be secure.
Here are the measurements based on the following criteria. Scope
in
XY
and
both channels set to GND. Defocused the beam and manipulated the
horz
control while reading voltages on the test points as identified
in
the
manual figure 9-7.
TP VDC
85 1.42 to 3.90
86 2.35 to 4.90
87 -1.46 to -4.19
88 -2.10 to -3.34
89 36.25 to 36.80
90 35.60 to 37.07
These seem a little wonky to me, especially test points 86, 89
and
90.
Any thoughts?
On Fri, Dec 5, 2014 at 1:11 PM, aodiversen@... <mailto:
aodiversen@...> [TekScopes] <
TekScopes@... <mailto:TekScopes@...>>
wrote:
Yes simply set both channels to GND and defocus the spot. That
way
you
won't burn-in the screen.
Albert
---In TekScopes@..., <kcrossett@...> wrote :
Ah. I think I understand. Do I need to inject a signal, say
from a
small
signal generator that outputs a dirty square wave, or can I do
it
simply
by
turning on the scope, defocusing the spot and manipulating the
horz
control
while measuring the voltage on the two test points?
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