Re: Tek 2230 - Storage does not work.
Beware that there are two versions of the 2230 storage channel switch and while they use the same circuit board, there are some discrete parts changes which need to be made if you replace one with the other. When I swapped a 234-0408-20, the one with popcorn noise that I posted about some time ago, with a 155-0022-00 I got uncontrolled oscillation. I managed to procure a replacement 234-0408-20 instead of making the changes. If you measure at pin 21 of the A/D converter, the voltage should be between about 0.25 and -2.25 volts as you adjust the vertical position control. If it adjusts within that range and you have no displayed trace, then the problem is not before this point. I suppose you could remove R2293 and apply about 1.0 volts directly to the A/D converter which should generate a vertically centered trace to verify everything past this point. On Wed, 25 Jan 2012 17:12:53 -0000, "david_s5y" <david_s5@...> wrote: I am trying to trouble shoot the missing storage traces. Does anyone have the DC voltage levels for Pin 6 and 11 of a working U2101 (MO36E). I am seeing +5.6 Volts which seems intuitively wrong give the 511 Ohm to -5 Volts. I measured -2.1 volts in store mode and -1.25 volts in non-store mode for the 155-0022-00. I measured -1.62 volts in store mode and -1.11 volts in non-store mode for the 234-0408-20. In store mode the voltage changes a bit depending on the channel selection and alt/chop selection. +5.6 volts does sound high. Schematic 11 shows the power connections for the chip on pins 3 and 5 which are not shows on schematic 16. They should be about 7.4 volts and 1.8 volts although I think it depends a little bit on which version you have. For that matter with a 1Khz 1V sin wave applied to chan 1 set to .5 V per. What should I see on 2 and 15 and 12 and 13? I measured about 0.02 volts peak-to-peak to ground at pins 2 or 15 which may seem low but is expected since the impedance is about 50 ohms. Pins 12 and 13 are the transconductance amplifier outputs into a cascode so the voltage change there is too small to bother measuring. I measured about 0.4 volts peak-to-peak at the collector of Q2101. --- In TekScopes@..., David <davidwhess@...> wrote:
The "storage channel switch" is a multiplexor and amplifier IC just
before the digitizer. It is not the storage mode button on the front
of the oscilloscope. I doubt the storage channel switch is the
problem but the vertical signal chain that goes through it should be
checked if the vertical position controls are not the problem.
There are two 4 pin flat cables which carry the channel 1 and channel
2 analog signals to the storage channel switch and if one falls off it
can cause the problem you describe but that would also cause the
readout to be displaced vertically so I do not think that is the
problem.
I never found a 2230 service manual to download. I ended up buying
the Artek Media PDF on CD and it was definately worth the price.
The 2230 that I repaired is pretty much my main oscilloscope.
On Thu, 19 Jan 2012 16:01:46 -0000, "david_s5y" <david_s5@...>
wrote:
The trace if off screen in a vertical direction. But it is a flat line and will disappear when moved.
I think you may be onto something with the switch. The scope sat for a long time in high humidity and dust. The traces disappear when I begin to press the switch.
Do you know where I can download the service manual?
David
--- In TekScopes@..., David <davidwhess@> wrote:
I asked about this some time ago and as far as I know, the battery
only backs up the waveform storage which is part of either optional
interface board. None of the various settings persist across power
cycles. You might expect that with the optional battery backed up
memory, the oscilloscope would store its settings there but it does
not.
Is it possible that the trace if off screen in a vertical direction?
That could be a problem with the vertical signal chain through the
storage channel switch or the analog and digital registration
calibration. The vertical position controls are a little weird in
this design since they work in both the analog and digital domains
simultaneously. The oscilloscope reads them to adjust the digital
display to match up with future samples.
If the service manual procedure "Adjust Acquisition Position Offset"
on page 5-11 checks out, then I think the problem will be in the
vertical signal chain leading up to the digitizer.
On Thu, 19 Jan 2012 03:30:04 -0000, "david_s5y" <david_s5@>
wrote:
Sorry to be unclear: By the Acc table I ment the ACQ_MODE_SETUP_TABLE/SELECT_MODE table.
So it is not supposed to persist across power cycles?
The big issues is the missing traces once I press Store. Some times I can move the V positions for the channel and see the trace, but it is a flat line, that soon disappear again.
--- In TekScopes@..., David <davidwhess@> wrote:
Acc Table?
As far as I know, none of the settings are retained when powered down.
There is no calibration data to save either.
You changed the battery on the option card, right? I believe that
only backs up the waveform storage.
On Thu, 19 Jan 2012 03:13:08 -0000, "david_s5y" <david_s5@>
wrote:
I have an Tektronix 2230 Storage scope. Everything appears to work except for the storage.
The unit passes diagnostics. I replaced the NV battery, but it does not remember the Acc Table setting and when switched to Store the traces all disappear (but the display Delta V, time base etc are all there).
Anyone had a similar problem? Any guidance would be appreciated.
David
|
Re: Tek 2230 - Storage does not work.
Thank you for you help!
Is that in store mode?
Ahh, the settings need to be the same.
Settings 1 Khz 1 Volt sinewave, CH1 0.5V Timebase 0.1mS
Vert mode: Ch1, XY out, BW in ALT
All the storage out exdept for Menue, Select Wave form and Store.
What did you mean by "(Dependent on T/B and flickering unless you toggle the onscreen display)." and "unless CH1 input is overdriven"
Am I correct to assume you are looking diferentialy at the 2 signal pairs (Pin 2/15 and 12/13) with another scope on add invert.
David
toggle quoted message
Show quoted text
--- In TekScopes@..., "chipbee40" <chipbee40@...> wrote:
Have you checked the position of all the jumpers on the storage board?, a lot of Ebay scopes come with them in diagnostic position.
My U2101 is pt no 234-0408-20 (Later version)
Pin 6/11 of U2101 -1.6V
Settings 1 Khz 1 Volt sinewave, CH1 0.5V Timebase 0.1mS
Pin 2/15 2v DC shifted 2V p/p square wave 4mS period (Dependent on T/B and flickering unless you toggle the onscreen display).
Pin 12/13 5.8VDC, no visible superimposed signal even at 2mV/cm on monitor scope unless CH1 input is overdriven.
I just happen to be working on a 2230, it will be back together shortly so if you need more info make it quick.
JC
--- In TekScopes@..., "david_s5y" <david_s5@> wrote:
I am trying to trouble shoot the missing storage traces. Does anyone have the DC voltage levels for Pin 6 and 11 of a working U2101 (MO36E). I am seeing +5.6 Volts which seems intuitively wrong give the 511 Ohm to -5 Volts.
For that matter with a 1Khz 1V sin wave applied to chan 1 set to .5 V per. What should I see on 2 and 15 and 12 and 13?
Thanks for your help!
David
|
Re: Tek 2230 - Storage does not work.
Have you checked the position of all the jumpers on the storage board?, a lot of Ebay scopes come with them in diagnostic position.
My U2101 is pt no 234-0408-20 (Later version)
Pin 6/11 of U2101 -1.6V
Settings 1 Khz 1 Volt sinewave, CH1 0.5V Timebase 0.1mS
Pin 2/15 2v DC shifted 2V p/p square wave 4mS period (Dependent on T/B and flickering unless you toggle the onscreen display).
Pin 12/13 5.8VDC, no visible superimposed signal even at 2mV/cm on monitor scope unless CH1 input is overdriven.
I just happen to be working on a 2230, it will be back together shortly so if you need more info make it quick.
JC
toggle quoted message
Show quoted text
--- In TekScopes@..., "david_s5y" <david_s5@...> wrote:
I am trying to trouble shoot the missing storage traces. Does anyone have the DC voltage levels for Pin 6 and 11 of a working U2101 (MO36E). I am seeing +5.6 Volts which seems intuitively wrong give the 511 Ohm to -5 Volts.
For that matter with a 1Khz 1V sin wave applied to chan 1 set to .5 V per. What should I see on 2 and 15 and 12 and 13?
Thanks for your help!
David
|
Re: 155-0242-01: Hybrid decapsulated
Very nice work, Jose. Any idea what the chips are?
?
Keep up the great work.
?
?
Tom
?
?
toggle quoted message
Show quoted text
----- Original Message -----
Sent: Wednesday, January 25, 2012 9:37
AM
Subject: [TekScopes] Re: 155-0242-01:
Hybrid decapsulated
?
I published two photos from the those 3 silicon chips inside. One
driver, two similar power amps. Will try to get bigger magnification, localize
the failure...
Cheers! CT1DGN
The LINK:
---
In TekScopes@...,
Jerry Massengale >
>
>
Jose,
>
> Great pics. Thank you.
>
> jerry
>
>
>
>
>
>
> Jerry Massengale
>
jmassen418a@...
>
>
>
>
> -----Original
Message-----
> From: viagioz
> To: TekScopes
<TekScopes@...>
>
Sent: Fri, Dec 16, 2011 9:08 am
> Subject: [TekScopes] 155-0242-01:
Hybrid X-Ray Photos
>
>
>
>
> HI
frinds,
>
> I share with you the inside from TEK24xx Z Axis
Hybrid:
>
>
>
> At this level investigation everything seems to be OK inside (the 3
die attach, bounding...)
>
> It is related with the subject
"2465B no trace".
>
> I try now to borrow an hybrid to be sure
it is the source of the problem.
>
> Then I will remove the
ceramic attached underneath and I will share with you microscope
pictures.
>
> Nice weekend, maybe Merry Christmas! I will not get
the new hybrid before next year, I guess!
>
> 73'
>
> Jose
> CT1DGN
>
|
Re: Tek 2230 - Storage does not work.
I am trying to trouble shoot the missing storage traces. Does anyone have the DC voltage levels for Pin 6 and 11 of a working U2101 (MO36E). I am seeing +5.6 Volts which seems intuitively wrong give the 511 Ohm to -5 Volts.
For that matter with a 1Khz 1V sin wave applied to chan 1 set to .5 V per. What should I see on 2 and 15 and 12 and 13?
Thanks for your help!
David
toggle quoted message
Show quoted text
--- In TekScopes@..., David <davidwhess@...> wrote:
The "storage channel switch" is a multiplexor and amplifier IC just
before the digitizer. It is not the storage mode button on the front
of the oscilloscope. I doubt the storage channel switch is the
problem but the vertical signal chain that goes through it should be
checked if the vertical position controls are not the problem.
There are two 4 pin flat cables which carry the channel 1 and channel
2 analog signals to the storage channel switch and if one falls off it
can cause the problem you describe but that would also cause the
readout to be displaced vertically so I do not think that is the
problem.
I never found a 2230 service manual to download. I ended up buying
the Artek Media PDF on CD and it was definately worth the price.
The 2230 that I repaired is pretty much my main oscilloscope.
On Thu, 19 Jan 2012 16:01:46 -0000, "david_s5y" <david_s5@...>
wrote:
The trace if off screen in a vertical direction. But it is a flat line and will disappear when moved.
I think you may be onto something with the switch. The scope sat for a long time in high humidity and dust. The traces disappear when I begin to press the switch.
Do you know where I can download the service manual?
David
--- In TekScopes@..., David <davidwhess@> wrote:
I asked about this some time ago and as far as I know, the battery
only backs up the waveform storage which is part of either optional
interface board. None of the various settings persist across power
cycles. You might expect that with the optional battery backed up
memory, the oscilloscope would store its settings there but it does
not.
Is it possible that the trace if off screen in a vertical direction?
That could be a problem with the vertical signal chain through the
storage channel switch or the analog and digital registration
calibration. The vertical position controls are a little weird in
this design since they work in both the analog and digital domains
simultaneously. The oscilloscope reads them to adjust the digital
display to match up with future samples.
If the service manual procedure "Adjust Acquisition Position Offset"
on page 5-11 checks out, then I think the problem will be in the
vertical signal chain leading up to the digitizer.
On Thu, 19 Jan 2012 03:30:04 -0000, "david_s5y" <david_s5@>
wrote:
Sorry to be unclear: By the Acc table I ment the ACQ_MODE_SETUP_TABLE/SELECT_MODE table.
So it is not supposed to persist across power cycles?
The big issues is the missing traces once I press Store. Some times I can move the V positions for the channel and see the trace, but it is a flat line, that soon disappear again.
--- In TekScopes@..., David <davidwhess@> wrote:
Acc Table?
As far as I know, none of the settings are retained when powered down.
There is no calibration data to save either.
You changed the battery on the option card, right? I believe that
only backs up the waveform storage.
On Thu, 19 Jan 2012 03:13:08 -0000, "david_s5y" <david_s5@>
wrote:
I have an Tektronix 2230 Storage scope. Everything appears to work except for the storage.
The unit passes diagnostics. I replaced the NV battery, but it does not remember the Acc Table setting and when switched to Store the traces all disappear (but the display Delta V, time base etc are all there).
Anyone had a similar problem? Any guidance would be appreciated.
David
|
Re: Aluminum panels wanted
Thanks Guys. I have panels coming on a trade deal.
Jerry Massengale
jmassen418a@...
toggle quoted message
Show quoted text
-----Original Message-----
From: Chris Moore
To: TekScopes
Sent: Wed, Jan 25, 2012 5:34 am
Subject: Re: [TekScopes] Re: Aluminum panels wanted
?
Hi Jerry,
Why couldn't you use a blank electrical box cover from lowes hardware? Cut to size of course.
Chris
--- On Wed, 1/25/12, Jerry Massengale <jmassen418a@...> wrote:
From: Jerry Massengale <jmassen418a@...>
Subject: Re: [TekScopes] Re: Aluminum panels wanted
To: TekScopes@...
Date: Wednesday, January 25, 2012, 4:03 PM
?
Hi,
I know what you are talking about. I have a couple but want something cheaper for resale. Thanks.
jerry
-----Original Message-----
From: Heinz-Peter Deutsch < hpdeutsch@...>
To: TekScopes < TekScopes@...>
Sent: Wed, Jan 25, 2012 4:39 am
Subject: [TekScopes] Re: Aluminum panels wanted
?
Tek No 016-0155-00
----------------------------------------------
What are blind panels? Where do you get them?
Jerry Massengale
jmassen418a@...
--
Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
belohnen Sie mit bis zu 50,- Euro!
|
|
Re: Aluminum panels wanted
Hi Jerry,
Why couldn't you use a blank electrical box cover from lowes hardware? Cut to size of course.
Chris
|
--- On Wed, 1/25/12, Jerry Massengale wrote:
From: Jerry Massengale
Subject: Re: [TekScopes] Re: Aluminum panels wanted
To: TekScopes@...
Date: Wednesday, January 25, 2012, 4:03 PM
?
Hi,
I know what you are talking about. I have a couple but want something cheaper for resale. Thanks.
jerry
Jerry Massengale
jmassen418a@...
-----Original Message-----
From: Heinz-Peter Deutsch
To: TekScopes
Sent: Wed, Jan 25, 2012 4:39 am
Subject: [TekScopes] Re: Aluminum panels wanted
?
Tek No 016-0155-00
----------------------------------------------
What are blind panels? Where do you get them?
Jerry Massengale
jmassen418a@...
--
Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
belohnen Sie mit bis zu 50,- Euro!
|
Re: Power supply problem with Tek 2220
Tektronix 2230, identical to 2220, less a few switch options, working, voltage across R907 0.23Volts
JC
toggle quoted message
Show quoted text
--- In TekScopes@..., "Tan Chor Ming" <jonray03@...> wrote:
Hi Tom,
Thank you for the detail of the problem which is similar to my tek 2220.
I am still unable to nail down the problem. I believe the scope is working
normally, because when it fires up it works normally.
My feeling is that it poorly designed thermally for 230V operation
Do you have voltage measurement for tek 2235 on R907?
I am getting 0.198V (with the +5V to the storage board disconnected,
effectively turning off the storage function).
This means that without the storage function connection, the current on +43V
is slightly below 1A.
I am not sure if this is a normal condition but it should be similar to the
tek 2235.
Under this condition, the scope could operate for quite a while without
problem
Once the +5V is connected to the storage board, voltage at R907 goes up to
2.3V~2.5V or about 1.15 to 1.25A on +43 and the power supply will shut down.
Following done with little effect or improvement
- Change 3 filter caps (only those that are feels hot) - C960, C962, C964
(for -5V for 2220 only)
- Change NMOS P9070. When changing P9070, I used a separate heatsink for
P9070 and still such down happens which means it is unlikely to be caused by
the thermal shutdown board.
- Shutdown is more likely cause by spurious overload in R907
- Change C907
- Change CR907 (two diode in parallel)
- Added C919 with 1000pf in parallel. Lowered switching freq but still
having a heated P9070 which shuts down. Not sure what freq but it is
definitely audible.
Rgds,
Chor Ming
_____
From: TekScopes@... [mailto:TekScopes@...] On Behalf
Of tom jobe
Sent: Monday, January 23, 2012 11:17 PM
To: TekScopes@...
Subject: Re: [TekScopes] Re: Power supply problem with Tek 2220
|
Re: Aluminum panels wanted
On 01/25/2012 10:03 AM, Jerry Massengale wrote: Tek No 016-0155-00 Hi,
I know what you are talking about. I have a couple but want something cheaper for resale. Thanks. You mentioned polycarbonate could do. What about specifying a laser cutting pattern to make them instead of buying them?
|
Re: Aluminum panels wanted
Hi,
I know what you are talking about. I have a couple but want something cheaper for resale. Thanks.
jerry
Jerry Massengale
jmassen418a@...
toggle quoted message
Show quoted text
-----Original Message-----
From: Heinz-Peter Deutsch
To: TekScopes
Sent: Wed, Jan 25, 2012 4:39 am
Subject: [TekScopes] Re: Aluminum panels wanted
?
Tek No 016-0155-00
----------------------------------------------
What are blind panels? Where do you get them?
Jerry Massengale
jmassen418a@...
--
Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
belohnen Sie mit bis zu 50,- Euro!
|
Re: Aluminum panels wanted
Tek No 016-0155-00
----------------------------------------------
What are blind panels? Where do you get them?
Jerry Massengale
jmassen418a@...
--
Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
belohnen Sie mit bis zu 50,- Euro!
|
OT: Wavetek 5809A bandwidth
Anybody knows what is the bandwidth for Wavetek 5809A spectrum analyzer?
|
Re: Aluminum panels wanted
to fill/close empty plugin front space
maybe i will find the tek part number again
got where, i got mine from ebay
Peter
=====================================
Hi,
What are blind panels? Where do you get them?
Jerry Massengale
jmassen418a@...
toggle quoted message
Show quoted text
-----Original Message-----
From: Heinz-Peter Deutsch <hpdeutsch@...>
To: TekScopes <TekScopes@...>
Sent: Tue, Jan 24, 2012 1:06 pm
Subject: [TekScopes] Re: Aluminum panels wanted
mmh, the second time a text vanished ?
In my own (yahoo) return copy, the text was there.
After i tried to send the text again - gone ???
strange behavior ...
-------------------------------
Ok, here it come again:
i said, why you don't use empty (blind) panels
Peter
--
Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
belohnen Sie mit bis zu 50,- Euro!
--
Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
belohnen Sie mit bis zu 50,- Euro!
|
Re: Aluminum panels wanted
Hi,
What are blind panels? Where do you get them?
Jerry Massengale
jmassen418a@...
toggle quoted message
Show quoted text
-----Original Message-----
From: Heinz-Peter Deutsch
To: TekScopes
Sent: Tue, Jan 24, 2012 1:06 pm
Subject: [TekScopes] Re: Aluminum panels wanted
?
mmh, the second time a text vanished ?
In my own (yahoo) return copy, the text was there.
After i tried to send the text again? - gone ???
strange behavior ...
-------------------------------
Ok, here it come again:
i said, why you don't use empty (blind) panels
Peter
--
Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
belohnen Sie mit bis zu 50,- Euro!
|
Re: 155-0242-01: Hybrid decapsulated
I published two photos from the those 3 silicon chips inside. One driver, two similar power amps. Will try to get bigger magnification, localize the failure...
Cheers! CT1DGN
The LINK:
toggle quoted message
Show quoted text
--- In TekScopes@..., Jerry Massengale <jmassen418a@...> wrote:
Jose,
Great pics. Thank you.
jerry
Jerry Massengale
jmassen418a@...
-----Original Message-----
From: viagioz <viagioz@...>
To: TekScopes <TekScopes@...>
Sent: Fri, Dec 16, 2011 9:08 am
Subject: [TekScopes] 155-0242-01: Hybrid X-Ray Photos
HI frinds,
I share with you the inside from TEK24xx Z Axis Hybrid:
At this level investigation everything seems to be OK inside (the 3 die attach, bounding...)
It is related with the subject "2465B no trace".
I try now to borrow an hybrid to be sure it is the source of the problem.
Then I will remove the ceramic attached underneath and I will share with you microscope pictures.
Nice weekend, maybe Merry Christmas! I will not get the new hybrid before next year, I guess!
73'
Jose
CT1DGN
|
Re: Back to soldering ceramic terminal strips
Nice work reclaiming those ceramic strips. What a simple solution. I imagine that it would be best to clean the ceramic very well prior to gluing.
|
Paging ArtekMedia -Update requests OFF LIST PLEASE
If you emailed in the last two weeks and did not receive? a reply ,
please email me direct today.
DO NOT PLACE REQUESTS THROUGH TEKSCOPES !!!!! :-)
I will be chained to the computer all day today and tomorrow trying
to get caught up
Dave
ARTEKMEDIA
On 1/25/2012 6:45 AM, Heinz-Peter Deutsch wrote:
?
Dave,
did you received my mails, too ??
Or are they gone to nirwana .....
Peter
===========================================
Dave et all
We at Artekmedia alive and well...but buried in a host of
issues.
I would suggest if you made a request in the last two
weeks and have
received no reply that you resend ..Dave Casey in
particualr I do not
see anything recent from you ..please resend
Sorry all for the inconvenience
Dave
--
Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
belohnen Sie mit bis zu 50,- Euro!
--
Dave & Lynn Henderson
Manuals@...
PO Box 175
Welch,MN 55089
|
Heinz
...please resend
Dave
On 1/25/2012 6:45 AM, Heinz-Peter Deutsch wrote:
?
Dave,
did you received my mails, too ??
Or are they gone to nirwana .....
Peter
===========================================
Dave et all
We at Artekmedia alive and well...but buried in a host of
issues.
I would suggest if you made a request in the last two
weeks and have
received no reply that you resend ..Dave Casey in
particualr I do not
see anything recent from you ..please resend
Sorry all for the inconvenience
Dave
--
Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
belohnen Sie mit bis zu 50,- Euro!
--
Dave & Lynn Henderson
Manuals@...
PO Box 175
Welch,MN 55089
|
Dave,
did you received my mails, too ??
Or are they gone to nirwana .....
Peter
===========================================
Dave et all
We at Artekmedia alive and well...but buried in a host of issues.
I would suggest if you made a request in the last two weeks and have
received no reply that you resend ..Dave Casey in particualr I do not
see anything recent from you ..please resend
Sorry all for the inconvenience
Dave
--
Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
belohnen Sie mit bis zu 50,- Euro!
|
Dave et all
We at Artekmedia alive and well...but buried in a host of issues.
?Been flying back and forth to Florida twice a week trying to get my
mother in-law placed in an assisted living facility ( Alzheimer's).
I have a couple of consulting clients as well that I spend two days
a week with here in MN ergo the need to fly back and forth .? I
think I will likely be back in the office here in MN now for at
least two weeks. To add insult to injury I appear to be having ISP
problems as I am sporadically missing whole "blocks" of email. I got
back yesterday and will start digging out today ..there seems to be
about 700 emails to sort through so the volume is beyond anything I
can reasonably sort through with a smart phone on road. :-P
I would suggest if you made a request in the last two weeks? and
have received no reply that you resend ..Dave Casey in particualr I
do not see anything recent from you ..please resend
Sorry all for the inconvenience
Dave
On 1/24/2012 11:55 PM, Dave Casey wrote:
?
Speaking of Artek, has
anyone heard from Dave lately? His last post was on the
7th. I'm trying to spend my money with him and as yet
I've not heard back.
?
Dave Casey
--
Dave & Lynn Henderson
Manuals@...
PO Box 175
Welch,MN 55089
|
David Hess
mescalero