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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

Kikusui COS 5041 TM, 40 MHz scope, 1986



 
 
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  #1  
Old August 11th 08, 04:44 PM posted to sci.electronics.repair
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Posts: 1,220
Default Kikusui COS 5041 TM, 40 MHz scope, 1986

Absolutely nothing on the display, even in darkened room at switch off.
PDA/EHT of 7.2 KV and voltages at the CRT base of -1100 to -1750
Heater continuity . Extremely good blanking.

Anyone know where to get the pinning of the CRT
Misubishi 150CXB31T ? mitsubishichips no use

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/





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  #2  
Old August 11th 08, 09:03 PM posted to sci.electronics.repair
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Default Kikusui COS 5041 TM, 40 MHz scope, 1986

On Mon, 11 Aug 2008 16:44:58 +0100, "N Cook" put
finger to keyboard and composed:

Absolutely nothing on the display, even in darkened room at switch off.
PDA/EHT of 7.2 KV and voltages at the CRT base of -1100 to -1750
Heater continuity . Extremely good blanking.

Anyone know where to get the pinning of the CRT
Misubishi 150CXB31T ? mitsubishichips no use


The block diagram on page 48 of the user manual ...

http://www.kikusui.co.jp/kiku_manual...0TM_41TM_E.PDF

.... shows an anode voltage of 10kV. The cathode voltage is -1800V.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
  #3  
Old August 11th 08, 10:15 PM posted to sci.electronics.repair
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Posts: 1,220
Default Kikusui COS 5041 TM, 40 MHz scope, 1986

Franc Zabkar wrote in message
...
On Mon, 11 Aug 2008 16:44:58 +0100, "N Cook" put
finger to keyboard and composed:

Absolutely nothing on the display, even in darkened room at switch off.
PDA/EHT of 7.2 KV and voltages at the CRT base of -1100 to -1750
Heater continuity . Extremely good blanking.

Anyone know where to get the pinning of the CRT
Misubishi 150CXB31T ? mitsubishichips no use


The block diagram on page 48 of the user manual ...

http://www.kikusui.co.jp/kiku_manual...0TM_41TM_E.PDF

... shows an anode voltage of 10kV. The cathode voltage is -1800V.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.


I'd looked there but you must be better at translating

«???????»

*
?????????????????????????????????????????????????? ??????????????????????????
?????????????????????????????????????????????????? ??????????????????
*
?????????????????????????????????????????????????? ??????????????????????????
???????????????????????????????????????????
* ?????????????????????????????????????????PDF?????? ?????????
* ??????????????????????????????????
*
?????????????????????????????????????????????????? ??????????????????????????


than I am

I suspect something wrong in the intensity /Z axis control. 7KV etc should
give some sort of display , but with severe distortion.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/







  #4  
Old August 11th 08, 10:30 PM posted to sci.electronics.repair
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Posts: 1,569
Default Kikusui COS 5041 TM, 40 MHz scope, 1986

On Mon, 11 Aug 2008 22:15:12 +0100, "N Cook" put
finger to keyboard and composed:

Franc Zabkar wrote in message
.. .


The block diagram on page 48 of the user manual ...

http://www.kikusui.co.jp/kiku_manual...0TM_41TM_E.PDF

... shows an anode voltage of 10kV. The cathode voltage is -1800V.

- Franc Zabkar


I'd looked there but you must be better at translating

«???????»


than I am

I suspect something wrong in the intensity /Z axis control. 7KV etc should
give some sort of display , but with severe distortion.


My link points to an English language manual.

You must have downloaded the Japanese version:
http://www.kikusui.co.jp/kiku_manual...0TM_41TM_J.PDF

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
  #5  
Old August 11th 08, 10:31 PM posted to sci.electronics.repair
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Posts: 1,569
Default Kikusui COS 5041 TM, 40 MHz scope, 1986

On Mon, 11 Aug 2008 16:44:58 +0100, "N Cook" put
finger to keyboard and composed:

Anyone know where to get the pinning of the CRT
Mitsubishi 150CXB31T ? mitsubishichips no use


Maybe you could find a similar CRT number in the following lists of
CRTs:

http://www.wescomponents.com/datashe...T_ADAPTORS.xls
http://bkprecision.com/download/docu...on/100-CRT.pdf
http://www.promax.es/downloads/docs/...rs-English.pdf

B31 appears to a phosphor type, so maybe the "B31" part of the number
isn't significant.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
  #6  
Old August 12th 08, 07:56 AM posted to sci.electronics.repair
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Posts: 1,220
Default Kikusui COS 5041 TM, 40 MHz scope, 1986

Franc Zabkar wrote in message
...
On Mon, 11 Aug 2008 16:44:58 +0100, "N Cook" put
finger to keyboard and composed:

Anyone know where to get the pinning of the CRT
Mitsubishi 150CXB31T ? mitsubishichips no use


Maybe you could find a similar CRT number in the following lists of
CRTs:

http://www.wescomponents.com/datashe...T_ADAPTORS.xls
http://bkprecision.com/download/docu...on/100-CRT.pdf
http://www.promax.es/downloads/docs/...rs-English.pdf

B31 appears to a phosphor type, so maybe the "B31" part of the number
isn't significant.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.


I'll have to suck it and see. Y leads are obvious as are heater.
4 thin insulation wires , 2 would be X and then astigmatism & geometry
probably.
Then a matter of knob twiddling while monitoring on the thick sleeved wires
for the G1,G2,A1,A2 leads for focus and intensity

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/


  #7  
Old August 12th 08, 09:36 AM posted to sci.electronics.repair
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Posts: 6,494
Default Kikusui COS 5041 TM, 40 MHz scope, 1986


"N Cook" wrote in message
...
Absolutely nothing on the display, even in darkened room at switch off.
PDA/EHT of 7.2 KV and voltages at the CRT base of -1100 to -1750
Heater continuity . Extremely good blanking.

Anyone know where to get the pinning of the CRT
Misubishi 150CXB31T ? mitsubishichips no use

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/


Have you tried contacting Kikusui themselves ? They have an English language
website, and as it's a 'legacy' item, they might be prepared to help.

Arfa


  #8  
Old August 12th 08, 10:15 AM posted to sci.electronics.repair
external usenet poster
 
Posts: 1,220
Default Kikusui COS 5041 TM, 40 MHz scope, 1986

Franc Zabkar wrote in message
...
On Mon, 11 Aug 2008 16:44:58 +0100, "N Cook" put
finger to keyboard and composed:

Absolutely nothing on the display, even in darkened room at switch off.
PDA/EHT of 7.2 KV and voltages at the CRT base of -1100 to -1750
Heater continuity . Extremely good blanking.

Anyone know where to get the pinning of the CRT
Misubishi 150CXB31T ? mitsubishichips no use


The block diagram on page 48 of the user manual ...

http://www.kikusui.co.jp/kiku_manual...0TM_41TM_E.PDF

... shows an anode voltage of 10kV. The cathode voltage is -1800V.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.


I never know how much a 300 meg,30KV, 1000:1 divider would pull down EHT. If
it measured more than 10K then I would be concerned.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/



  #9  
Old August 12th 08, 06:26 PM posted to sci.electronics.repair
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Posts: 7
Default Kikusui COS 5041 TM, 40 MHz scope, 1986


On 12 Aug 08 at group /sci/electronics/repair in article
(Arfa Daily) wrote:


Have you tried contacting Kikusui themselves ? They have an English
language website, and as it's a 'legacy' item, they might be prepared
to help.


THX for the link. So I downloaded an updated manual for my COS6100M
oscilloscope (2x100MHz). I had only a COS6100 manual with the used osci.
However it's a great equipment.

They have also a manual for the COS5041TM (without spaces!)

Saludos Wolfgang

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  #10  
Old August 18th 08, 03:21 PM posted to sci.electronics.repair
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Posts: 1,220
Default Kikusui COS 5041 TM, 40 MHz scope, 1986

Something wrong with wiring/connectors to the CRT heater, the orange glow is
visible under the shielding now attended to and the scope is working.

Scale illumination lamps blown, unloaded supply, at maximum of pot control
is 19.5V to paired up bulbs. Anyone ever tried droppered blue or white LEDs
for such purposes. Would require a reflector on the LED axis to throw light
off radially. Otherwise it will probably have to be 24V bulbs going in
there.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/


 




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