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Old 16th Oct 2019, 10:17 am   #1
szczepan_def
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Default Polyskop swob 3 Rohde & Schwarz

Ladies and Gentlemen, Does anyone have a service manual in DE / EN? I have such a device, unfortunately it is damaged, I try to fix this device, the diagram will make my work easier.
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Old 22nd Oct 2019, 10:37 am   #2
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Default Re: Polyskop swob 3 Rohde & Schwarz

Hi everyone, the documentation is available here:

http://www.rainer-foertig.de/unterlagen/RS-27_2010.htm

there is a fairly high cost and several parts
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Old 22nd Oct 2019, 8:29 pm   #3
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Default Re: Polyskop swob 3 Rohde & Schwarz

I do not have a manual - sorry, but the company you mention is excellent - professional copies, all provided in a nice folder - I ordered a manual from them for my E724 receiver. Amazed at the quality.
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Old 22nd Feb 2020, 10:53 pm   #4
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Default Re: Polyskop swob 3 Rohde & Schwarz

I have a short circuit which destroys the fuse s2 4a, how do I remove the module lin / log fuse is live, is this module damaged?
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Old 23rd Feb 2020, 8:54 am   #5
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Default Re: Polyskop swob 3 Rohde & Schwarz

Two Red caps 100/20 in lin/log module is ok.
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Old 23rd Feb 2020, 10:21 am   #6
6AL5W-Martin
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Default Re: Polyskop swob 3 Rohde & Schwarz

hello from germany.

SWOB III is not a simply manual, that is a huge box of manuals.
It is the best to explain exactly what is the problem, to specify it.
Is it a common problem or a special and rare problem?
I can give you the scans of coarse, but please don`t ask me to scan them all, it is toooo much and the most of that is for a repair not required.

In your module are red blocks, they are ERO tantalium electrolytic capacitors.
The are almost the problem, you have a shorted PSU there.
At first - remove them, and test again if the shorting is removed, when yes, replace it with a simply 100F/25V

Shorting in a plugin.
Remove the plugin, it is only one screw in the front plate, and turn ON the SWOB to see if the shorting is removed when the plugin is not installed.
If yes, you have a shorting in this plugin. Take care in the LinLog, the demodulator diodes in the dezifix input plug are heated, temperated by a regulated power transistor, if this unit get warm it is not defect, it is working
A warm input plug means, all is ready. Give him time to do that before testing accurate. Sorry, the bad elko is below this plug, if you are to lazy to resold it disconnect it from downside, that is no problem.

The PSU.
it use 723 ICs (the round type), and following power transistors. There is a over-current-protection, so the PSU will not damage when there is a low voltage shorted.

About the service manuals.
They have printed 2 full maps for the frame, and one book for each plugin.
The are more various plugins in the catalog then the SWOB have slots, so each SWOB have only some but never all of them. This means: his papers will not be compatible when your SWOB have another plugin.
Also the oscillator boards: in the description SWOB III have 10 slots for oscillators, and your unit have only the oscillators inside what the pre owner have ordered, oftenly there are only 4 of them. But there was some custom: R+S listed 10 oscillators, call them common oscillators. And they have build custom oscillators following the desires of the client. There is a little book for each oscillator, and for custom oscillators mostly with a hand painted application from the engineer who have solded it. I have a SWOB III, full loaded + extendet, it have 12 oscillators and works up to 1.25GHz. So there are some books for oscillator boards also.

Martin
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Last edited by 6AL5W-Martin; 23rd Feb 2020 at 10:49 am.
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Old 23rd Feb 2020, 11:20 am   #7
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Default Re: Polyskop swob 3 Rohde & Schwarz

PSU:

the 47F on the boards can be replaced by a fresh one.
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Old 23rd Feb 2020, 12:07 pm   #8
szczepan_def
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Default Re: Polyskop swob 3 Rohde & Schwarz

Thanks Martin for your information, i have big respect for you knowledge for this UNIT

95% my problem is in LIN/LOG plug, Shorting in a plugin.

I removed the C11 capacitor (negative power supply) and here I still have a short circuit at the soldering points for the C11 capacitor I think this is a very bad indication... You can send me the schematic of this plugin?

P.S. later I will see the wobulator and describe how many slots it has
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Old 23rd Feb 2020, 12:40 pm   #9
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Default Re: Polyskop swob 3 Rohde & Schwarz

I have one of these and replaced every electrolytic as I had problems with shorted power rails on the main boards.
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Old 23rd Feb 2020, 12:46 pm   #10
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Default Re: Polyskop swob 3 Rohde & Schwarz

Hi,

Manual is available at BAMA Archive for the SWOB in German
Is this one any use?

Kind regards
Dave G0ELJ
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Old 23rd Feb 2020, 1:18 pm   #11
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Default Re: Polyskop swob 3 Rohde & Schwarz

Quote:
Originally Posted by Dave757 View Post
Hi,

Manual is available at BAMA Archive for the SWOB in German
Is this one any use?

Kind regards
Dave G0ELJ
Thanks but Is only swob 1,2,4, and 5 , no for 3

Adam
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Old 23rd Feb 2020, 2:38 pm   #12
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Default Re: Polyskop swob 3 Rohde & Schwarz

it is the LinLog without instrument `? please Bn-number. 424720x (x=4?)

There is nothing except the Electrolytics what can short the plugins power line.
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Last edited by 6AL5W-Martin; 23rd Feb 2020 at 3:00 pm.
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Old 23rd Feb 2020, 3:18 pm   #13
szczepan_def
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Default Re: Polyskop swob 3 Rohde & Schwarz

Hi Martin, I have the whole unit, it's the size of a small car. I have a short circuit in the lin / log plug BN4247204 / 60. If this plug is out of the UNIT then the Si2 T4 fuse is ok.

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Old 23rd Feb 2020, 3:21 pm   #14
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Default Re: Polyskop swob 3 Rohde & Schwarz

probably the short circuit is on the negative power line, pcb 42247204-37 from the lin / log plug (pin 1-3) i have 0 ohm
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Last edited by szczepan_def; 23rd Feb 2020 at 3:27 pm.
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Old 23rd Feb 2020, 5:41 pm   #15
6AL5W-Martin
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Default Re: Polyskop swob 3 Rohde & Schwarz

ok, give me one hour to find the answer
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Old 23rd Feb 2020, 5:53 pm   #16
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Default Re: Polyskop swob 3 Rohde & Schwarz

cut the wire from C116 upside and test if the short is still there.
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Old 23rd Feb 2020, 6:09 pm   #17
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Default Re: Polyskop swob 3 Rohde & Schwarz

C116 10F 20V
C103 + C110 0,1F
C107 (not shure) 39

one of them is the bad boy. I am pretty shure to get a catch by C116
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Old 23rd Feb 2020, 6:10 pm   #18
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Default Re: Polyskop swob 3 Rohde & Schwarz

Quote:
Originally Posted by 6AL5W-Martin View Post
cut the wire from C116 upside and test if the short is still there.
My cap C116 is dead 🧐 IT Has 0.6 ohm, Martin please check capacity of it
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Old 23rd Feb 2020, 6:13 pm   #19
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Default Re: Polyskop swob 3 Rohde & Schwarz

Ok, Post 17, thanks
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Old 23rd Feb 2020, 6:16 pm   #20
6AL5W-Martin
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Default Re: Polyskop swob 3 Rohde & Schwarz

catched, C116
10F , 20V or more. replace please.
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