|
Re: Tek 2215 Low Bright
I can't really help you with the diagnosis, but I can tell you that a hum is not normal. I've owned a 2215 since I bought it new in the late 80s and it has never hummed at all.
Rich
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I can't really help you with the diagnosis, but I can tell you that a hum is not normal. I've owned a 2215 since I bought it new in the late 80s and it has never hummed at all.
Rich
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By
Rich Frahm
·
#166594
·
|
|
Re: SG503 with flashing display and amplitude problems.
Ancel,
Yes, It is always good practice to clean switches and contacts. I have learned to do this first thing, before I even power up most of the equipment that I get. I have bought so much stuff
|
Ancel,
Yes, It is always good practice to clean switches and contacts. I have learned to do this first thing, before I even power up most of the equipment that I get. I have bought so much stuff
|
By
Michael W. Lynch
·
#166593
·
|
|
Re: SG503 with flashing display and amplitude problems.
David is right on that...had to do that 6 months ago and all is Well...clean the exposed rotatory switch contact properly.
|
David is right on that...had to do that 6 months ago and all is Well...clean the exposed rotatory switch contact properly.
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By
Ancel
·
#166592
·
|
|
Re: R7844 PSU is sick! Can you help?
Hi David,
All the low voltages are coming up correct, just for the 10 to 15ms as described in the manual. I haven't scoped the 1.5kV winding as my scope won't go up that high.
The other input to the
|
Hi David,
All the low voltages are coming up correct, just for the 10 to 15ms as described in the manual. I haven't scoped the 1.5kV winding as my scope won't go up that high.
The other input to the
|
By
coop81899@...
·
#166591
·
|
|
Re: 7854 ROMs: the whole story
Hi Christian!
All variants of 7854 do have the exact same address layout:
The 4 ROMs (4 times 64k) of the early ROM board are substituted by the two 128k EPROMs of the later version.
The two
|
Hi Christian!
All variants of 7854 do have the exact same address layout:
The 4 ROMs (4 times 64k) of the early ROM board are substituted by the two 128k EPROMs of the later version.
The two
|
By
Holger Lübben
·
#166590
·
|
|
Re: R7844 PSU is sick! Can you help?
It's not just the HV multiplier that can pull Bal-Sense - if you dig into the schematic the LV regulator board, you'll find that all the supplies are connected to Bal-Sense by a set of carefully
|
It's not just the HV multiplier that can pull Bal-Sense - if you dig into the schematic the LV regulator board, you'll find that all the supplies are connected to Bal-Sense by a set of carefully
|
By
David C. Partridge
·
#166589
·
|
|
Re: 7854 ROMs: the whole story
Hi Holger,
I stepped in this 7854 ROM discussion because I have 7854s among which some with ROM rot.
I already modified one ROM board to remove the FPLA and use 4 EPROMs. However, I have
at least
|
Hi Holger,
I stepped in this 7854 ROM discussion because I have 7854s among which some with ROM rot.
I already modified one ROM board to remove the FPLA and use 4 EPROMs. However, I have
at least
|
By
santa0123456
·
#166588
·
|
|
Re: Tektronix 465M - only scale illumination
Hi,
My trick to remove ic's that I do need to re-use is:
Use a good soldering iron and a solder sucker (or bread?) (Do you spell it like this?) on each pin individually;
When all pins are as clean
|
Hi,
My trick to remove ic's that I do need to re-use is:
Use a good soldering iron and a solder sucker (or bread?) (Do you spell it like this?) on each pin individually;
When all pins are as clean
|
By
satbeginner
·
#166587
·
|
|
Re: 7854 ROMs: the whole story
I have added the 160-0445-02 FPLA information to TekWiki.
I also noticed that revision -01 ROM wiki images
(160-0408-01, 160-0409-01, 160-0410-01 and 160-0411-01)
do not match my original ROMs having
|
I have added the 160-0445-02 FPLA information to TekWiki.
I also noticed that revision -01 ROM wiki images
(160-0408-01, 160-0409-01, 160-0410-01 and 160-0411-01)
do not match my original ROMs having
|
By
Dan G
·
#166586
·
|
|
Re: Tektronix 465M - only scale illumination
OK finally took the 465M bottom cover off, removed leaky cap ...
Do I need to replace it with 2.2mf 200v or let's say 10mf 200v will work too?
I also found TEK 155-0124-00 on my donor 2235, and it's
|
OK finally took the 465M bottom cover off, removed leaky cap ...
Do I need to replace it with 2.2mf 200v or let's say 10mf 200v will work too?
I also found TEK 155-0124-00 on my donor 2235, and it's
|
By
paronaram
·
#166585
·
|
|
Re: Tek 2215 Low Bright
A bit anecdotal but figured i'd share a recent situation that may help you
narrow down where to look: Recently a friend of mine had a 2213 (note: not
the 2213A) I believe it has a similar power supply
|
A bit anecdotal but figured i'd share a recent situation that may help you
narrow down where to look: Recently a friend of mine had a 2213 (note: not
the 2213A) I believe it has a similar power supply
|
By
guy232
·
#166584
·
|
|
Re: Tek 2215 Low Bright
That hum sure sounds too loud to be "normal", but I will consider that.
I guess I need to study the circuit to see if any suspect aged parts are under the cover, and if they would cause low
|
That hum sure sounds too loud to be "normal", but I will consider that.
I guess I need to study the circuit to see if any suspect aged parts are under the cover, and if they would cause low
|
By
Bill Ripley, KY5Q
·
#166583
·
|
|
Re: Tek 2215 Low Bright
My 2215 also has a hum which I thought was weird but from what I understand is normal. My 2215 also had a dim CRT which ended up being a bad CRT and once replace it works fine. Also from my
|
My 2215 also has a hum which I thought was weird but from what I understand is normal. My 2215 also had a dim CRT which ended up being a bad CRT and once replace it works fine. Also from my
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By
Brendan
·
#166582
·
|
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Tek 2215 Low Bright
I am fixing up a Tek 2215 for a student. It is the base model, SN B013534. When I turn it on, it makes a hum that is too loud to be normal. I checked all the main-board power supplies (+/- 8.6, +5,
|
I am fixing up a Tek 2215 for a student. It is the base model, SN B013534. When I turn it on, it makes a hum that is too loud to be normal. I checked all the main-board power supplies (+/- 8.6, +5,
|
By
Bill Ripley, KY5Q
·
#166581
·
|
|
R7844 PSU is sick! Can you help?
Hi All
The mains suppressor blew up in my R7844 as they tend to, however I replaced it and nothing happened, the fan just moved a little.
I have tracked the fault down to the U1275 IC being cut off
|
Hi All
The mains suppressor blew up in my R7844 as they tend to, however I replaced it and nothing happened, the fan just moved a little.
I have tracked the fault down to the U1275 IC being cut off
|
By
coop81899@...
·
#166580
·
|
|
Re: TEK 5054 CPU Fan
For whatever reason, when I just checked the scope again, the network is
now working. I have it setup that if I press PRINT, is now saves a BMP of
the screen to the "T" drive, which is a temp folder
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For whatever reason, when I just checked the scope again, the network is
now working. I have it setup that if I press PRINT, is now saves a BMP of
the screen to the "T" drive, which is a temp folder
|
By
David Kuhn
·
#166578
·
|
|
Re: TEK 5054 CPU Fan
" Real vnc,
http://tiwindows-renan.blogspot.com/2010/07/real-vnc.html#!/2010/07/real-vnc.html
"
Thank you, there are several on the Web. Another one calling itself
RealVNC will not run on Windows
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" Real vnc,
http://tiwindows-renan.blogspot.com/2010/07/real-vnc.html#!/2010/07/real-vnc.html
"
Thank you, there are several on the Web. Another one calling itself
RealVNC will not run on Windows
|
By
David Kuhn
·
#166577
·
|
|
Re: 7000 series plug-in ribbon cable extender
Hi John and Brian,
First of all, thanks for your comment.
Regarding the strain reliefs, after some thinking, I ruled not to add them, here are few motivations:
1) End user can still add them, just
|
Hi John and Brian,
First of all, thanks for your comment.
Regarding the strain reliefs, after some thinking, I ruled not to add them, here are few motivations:
1) End user can still add them, just
|
By
Ke-Fong Lin
·
#166576
·
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|
Re: TEK 5054 CPU Fan
Real vnc, http://tiwindows-renan.blogspot.com/2010/07/real-vnc.html#!/2010/07/real-vnc.html
-----Mensaje original-----
De: TekScopes@groups.io [mailto:TekScopes@groups.io] En nombre de David
|
Real vnc, http://tiwindows-renan.blogspot.com/2010/07/real-vnc.html#!/2010/07/real-vnc.html
-----Mensaje original-----
De: TekScopes@groups.io [mailto:TekScopes@groups.io] En nombre de David
|
By
Miguel Work
·
#166575
·
|
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Re: TEK 5054 CPU Fan
" VNC remote desktop"
Which product? I guess the client would have to work on Windows 2000 to
share its desktop and then on my Windows 7 test computer.
|
" VNC remote desktop"
Which product? I guess the client would have to work on Windows 2000 to
share its desktop and then on my Windows 7 test computer.
|
By
David Kuhn
·
#166574
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