Re: TDS8200 80E04 TDT/Sampling Module
I¡¯d talk to Skyworks if you can.?? I¡¯ve no idea whether the originals were ¡°zero bias¡± or regular detector Schottky diodes. ? Tek ¡°might¡± tell you¡ ?
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From: [email protected] <[email protected]> On Behalf Of Aaron via groups.io
Sent: 07 December 2022 13:21
To: [email protected]
Subject: Re: [TekScopes2] TDS8200 80E04 TDT/Sampling Module? Oh, ok. So they have beam lead pin diodes too then. I'll do more research to clarify. The Schottky makes more sense due to the lower forward bias.
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Re: TDS8200 80E04 TDT/Sampling Module
Oh, ok. So they have beam lead pin diodes too then. I'll do more research to clarify. The Schottky makes more sense due to the lower forward bias.
?
Thanks for the info!
?
Aaron
?
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Re: TDS8200 80E04 TDT/Sampling Module
Yes, however you've been helpful in stearing me in the right direction.
Regards,Aaron
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Re: TDS8200 80E04 TDT/Sampling Module
On Tue, Dec 6, 2022 at 06:07 PM, Aaron wrote:
Hi Stefan,
Where can the special tools be bought?
I don't know, but I'm quiet sure they are expensive. Stefan
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Re: TDS8200 80E04 TDT/Sampling Module
Hi David,
Should I be looking for a beam or Schottky diode?
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Re: TDS8200 80E04 TDT/Sampling Module
Hi Stefan,
Where can the special tools be bought?
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Re: TDS8200 80E04 TDT/Sampling Module
Hi Aaron,
AFAIK there is no public service manual for it.
You need special tools, that can make tiny movements under the microscope.
Stefan
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Re: Tek2465B power supply troubleshooting
Thank you Chuck and Ozan. I will continue dealing with the 10v circuit. ? I will be a little slow about working on it as my day job and family time seem to take up my spare time. ?I will continue updating so hopefully it will be useful to someone else dealing with this same type of issue.
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On Dec 5, 2022, at 1:23 AM, Ozan <ozan_g@...> wrote:
?If you pull out J208, does +10V recover? As Chuck said +10V is the reference to rest of the blocks. It could be low because of detecting a fault, removing J208 disables fault detection for +10V. If after removing J208, +10V is still low check 2.5V reference. +15V unregulated looks high enough to run the 2.5 reference, you should see the same +15V unregulated voltage at pin1 of U1290, and 2.5V at pin 2. Ozan On Sun, Dec 4, 2022 at 07:06 PM, Craig Cramb wrote:
2465B S/N B077993
Inverter card 670-7282-12
Regulator 670-7281-08
Previous repairs unknown.
Looking into a power supply that is basically non- functional on some voltages. I have removed it from the scope and connected it to power supplies loading assembly that was built by Jerry Massengale. This is perfect for checking power supply and have used it over the years. But now I¡¯m stuck and cannot seem to see what is causing low voltage from supplies to be out of tolerance.
+87= 60vdc
+42= 19.92vdc
-15VU=-17.80vdc
+10=0.113vdc
+5VD=+4.13vdc
+5=3.3vdc
-5=-2.8vdc
-15=-1.47vdc
-8=-2.15vdc
+15=+2.58vdc
I looked into the inverter troubleshooting and built myself a +5VD primary test load and then went back to inverter troubleshooting and decided this isn¡¯t going to help me as it seems to stop at +10vdc.
I went thru and checked the unregulated voltages at
J234b side. 1=-17vdc,2=-6.3vdc,3=gnd,4=+6.3vdc, 5=+17.3 (All a little low by 2vdc)
J233b side. 1=-6.2vdc,2=+17.2,3=+48,4=Gnd,5=+90.8. (These seem close a bit high but 1=6.2vdc is way high as per schematic)
This is where I¡¯m at right now. If anyone would like to make any suggestions it would be greatly appreciated.
Craig Cramb
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Re: TDS8200 80E04 TDT/Sampling Module
Thanks David,
I'm looking into the particulars now. The .pdf has useful bonding information.
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Re: TDS8200 80E04 TDT/Sampling Module
Maybe HSCH-5341 batch matched beam lead diodes if they are still available, or maybe something from Skyworks
https://store.skyworksinc.com/datasheets/skyworks/skyworks_cat501-09a.pdf ?
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From: [email protected] <[email protected]> On Behalf Of Aaron via groups.io
Sent: 06 December 2022 00:11
To: [email protected]
Subject: [TekScopes2] TDS8200 80E04 TDT/Sampling Module? Hi everyone,
I have posted pictures in the "80E04" folder. I need assistance in locating the sampler diodes by the red arrow in the picture. Also, need to know how to replace such a small component. Thank you.
Regards,
Aaron
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TDS8200 80E04 TDT/Sampling Module
Hi everyone,
I have posted pictures in the "80E04" folder. I need assistance in locating the sampler diodes by the red arrow in the picture. Also, need to know how to replace such a small component. Thank you.
Regards,
Aaron
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TDS8200 & 80E04 TDR Module
Hi Everyone,
Hopefully, I can find help here or be directed. The Tektronix 80E04 20GHz TDR module needs sampling diodes. I don't know where to start for such a high frequency device and if it can be replaced due its small size. Please see the following photos to help in researching the defective parts. Thank you. The Photos are under "80E04".
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Aaron <abqtv@...> added the album 80E04: 20 GHz TDR/Sampling module for the TDS8200 70 GHz Main Frame
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Re: Tek2465B power supply troubleshooting
If you pull out J208, does +10V recover? As Chuck said +10V is the reference to rest of the blocks. It could be low because of detecting a fault, removing J208 disables fault detection for +10V.
If after removing J208, +10V is still low check 2.5V reference. +15V unregulated looks high enough to run the 2.5 reference, you should see the same +15V unregulated voltage at pin1 of U1290, and 2.5V at pin 2.
Ozan
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On Sun, Dec 4, 2022 at 07:06 PM, Craig Cramb wrote:
2465B S/N B077993
Inverter card 670-7282-12
Regulator 670-7281-08
Previous repairs unknown.
Looking into a power supply that is basically non- functional on some voltages. I have removed it from the scope and connected it to power supplies loading assembly that was built by Jerry Massengale. This is perfect for checking power supply and have used it over the years. But now I¡¯m stuck and cannot seem to see what is causing low voltage from supplies to be out of tolerance.
+87= 60vdc
+42= 19.92vdc
-15VU=-17.80vdc
+10=0.113vdc
+5VD=+4.13vdc
+5=3.3vdc
-5=-2.8vdc
-15=-1.47vdc
-8=-2.15vdc
+15=+2.58vdc
I looked into the inverter troubleshooting and built myself a +5VD primary test load and then went back to inverter troubleshooting and decided this isn¡¯t going to help me as it seems to stop at +10vdc.
I went thru and checked the unregulated voltages at
J234b side. 1=-17vdc,2=-6.3vdc,3=gnd,4=+6.3vdc, 5=+17.3 (All a little low by 2vdc)
J233b side. 1=-6.2vdc,2=+17.2,3=+48,4=Gnd,5=+90.8. (These seem close a bit high but 1=6.2vdc is way high as per schematic)
This is where I¡¯m at right now. If anyone would like to make any suggestions it would be greatly appreciated.
Craig Cramb
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Re: Tek2465B power supply troubleshooting
Hi Craig, I too have one of Jerry's loads. It works very well. I bought it when I got tired of using clip leads and a couple of power resistors. The 10V supply is a very important reference voltage, start there. If it is wrong, nothing else will be right. -Chuck Harris On Sun, 4 Dec 2022 21:06:20 -0600 "Craig Cramb" <electronixtoolbox@...> wrote: 2465B S/N B077993
Inverter card 670-7282-12?
Regulator 670-7281-08
Previous repairs unknown.
?
?Looking into a power supply that is basically non- functional on
some voltages. I have removed it from the scope and connected it to
power supplies loading assembly that was built by Jerry Massengale.
This is perfect for checking power supply and have used it over the
years. But now I¡¯m stuck and cannot seem to see what is causing low
voltage from supplies to be out of tolerance. +87= 60vdc +42=
19.92vdc -15VU=-17.80vdc +10=0.113vdc +5VD=+4.13vdc +5=3.3vdc
-5=-2.8vdc
-15=-1.47vdc
-8=-2.15vdc
+15=+2.58vdc
I looked into the inverter troubleshooting and built myself a +5VD
primary test load and then went back to inverter troubleshooting and
decided this isn¡¯t going to help me as it seems to stop at +10vdc. I
went thru and checked the unregulated voltages at J234b side.
1=-17vdc,2=-6.3vdc,3=gnd,4=+6.3vdc, 5=+17.3 (All a little low by
2vdc) J233b side. 1=-6.2vdc,2=+17.2,3=+48,4=Gnd,5=+90.8. (These
seem close a bit high but 1=6.2vdc is way high as per schematic)
This is where I¡¯m at right now. If anyone would like to make any
suggestions it would be greatly appreciated.
Craig Cramb
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Tek2465B power supply troubleshooting
2465B S/N B077993
Inverter card 670-7282-12?
Regulator 670-7281-08
Previous repairs unknown.
?
?Looking into a power supply that is basically non- functional on some voltages. I have removed it from the scope and connected it to power supplies loading assembly that was built by Jerry Massengale. This is perfect for checking power supply and have used it over the years. But now I¡¯m stuck and cannot seem to see what is causing low voltage from supplies to be out of tolerance.
+87= 60vdc
+42= 19.92vdc
-15VU=-17.80vdc
+10=0.113vdc
+5VD=+4.13vdc
+5=3.3vdc
-5=-2.8vdc
-15=-1.47vdc
-8=-2.15vdc
+15=+2.58vdc
I looked into the inverter troubleshooting and built myself a +5VD primary test load and then went back to inverter troubleshooting and decided this isn¡¯t going to help me as it seems to stop at +10vdc.
I went thru and checked the unregulated voltages at
J234b side. 1=-17vdc,2=-6.3vdc,3=gnd,4=+6.3vdc, 5=+17.3 (All a little low by 2vdc)
J233b side. 1=-6.2vdc,2=+17.2,3=+48,4=Gnd,5=+90.8. (These seem close a bit high but 1=6.2vdc is way high as per schematic)
This is where I¡¯m at right now. If anyone would like to make any suggestions it would be greatly appreciated.
Craig Cramb
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Heads on possible "fake" 2465B on ebay
This is a FYI that this 2465B on ebay is possibly a converted 2445B:
The badge above CRT is fake and the blue filter appears to be a blue plastic film placed behind the implosion shield.
Scopes with these modifications, especially the fake badge, have been shown to be converted 2445Bs.
--Victor
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Re: Manual for 1240/1240 ROM Decoder packs needed. 12RM21 is at the top of the list
Hi everyone , this is slightly off topic but it is a very similar problem . I have a DAS9100 and part of the system is the PMA100 . The DAS recognizes the PMA100 and seems to organize the pods sensibly -- but the manual says the PMA needs certain tapes for use , it seems there are 2 tapes needed for each possible CPU to be part of the tested system . Does anyone know of the whereabouts of any of these tapes and does anyone know if the PMA actually works properly without use of any of the tapes as the manual does not suggest usage for anything with a user configuration . I have the general-purpose pod and the Z80 pod . Any help will be much appreciated .
Brian (UK).
On Monday, 28 November 2022 at 20:02:52 GMT, bownes <bownes@...> wrote:
Folks,
A number of folks are looking to use the microprocessor disassembly ROM packs for their 1240/1241 analyzers. Unfortunately, while the ROM packs are readily available, the documentation, which specifies which pin of the micro goes to which pod/channel all appear to be MIA.
I've been puzzling out some of these over on the w140.com wiki, but the actual docs would be much less error prone, even if you can only mail me a photo of the page with the micro to pod connection listing.
Many thanks!
Bob
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Manual for 1240/1240 ROM Decoder packs needed. 12RM21 is at the top of the list
Folks,
A number of folks are looking to use the microprocessor disassembly ROM packs for their 1240/1241 analyzers. Unfortunately, while the ROM packs are readily available, the documentation, which specifies which pin of the micro goes to which pod/channel all appear to be MIA.
I've been puzzling out some of these over on the w140.com wiki, but the actual docs would be much less error prone, even if you can only mail me a photo of the page with the micro to pod connection listing.
Many thanks!
Bob
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David C. Partridge
Stefan
Craig Cramb
Brian
bownes