Only C31 Burn
I power up and tested all function
V, Ohm, Hz, Diode, ºC, ... don't see any errors
Zero, Hold, Select.
Ruy...
neuron
Senior Member
Last Activity: 12-29-2020, 05:25 PM
Joined: 02-19-2013
Location: Imagina
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Re: Koban - Current Clamp Meter - DMM
Only C31 Burn
I power up and tested all function
V, Ohm, Hz, Diode, ºC, ... don't see any errors
Zero, Hold, Select.
Ruy... -
Re: Koban - Current Clamp Meter - DMM
stj - the only info is MASTECH MS8250B (sigrok.org)
It's in japan. and no info about the cap ......Leave a comment:
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Re: Koban - Current Clamp Meter - DMM
UT61E is ES51922 !!!
IC11 I can't find ...
DMM use Semico CS7721CN - Semico CS7721CN: UT60C, UT60A
Diode mode?
2TY - I don't need remove from the board.
All my DMM can test Transistors in Boards.
And where I can find that schematics?
In your attach XC61xx.PNG the cap between Vin and ground ... value?
Ruy...Last edited by neuron; 12-25-2020, 07:16 PM.Leave a comment:
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Re: Koban - Current Clamp Meter - DMM
Thank you stj, megaraider
2TY 2 - Emitter -> down -> 2 Layer, through hole.
2 - Emitter -> up , Left -> C letter ->
U3 pin 2 VSS -> C31
U3 - pin 1 (down) -> 2 Layer, through hole -> the other C31 pin
Testing U3 (Diode Mode) I get +- 0,56V
Other procedure to test this IC?
Regard,
Ruy...Last edited by neuron; 12-24-2020, 05:01 PM.Leave a comment:
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Re: Koban - Current Clamp Meter - DMM
Boa tarde megaraider,
And the procedure to test ?
The last letter ... is necessary?
C31 no info?
I can follow the tracks in the board and
tested 2TY and all resistors around the C31.
C31 in the board ...?
Thank you
Ruy...Leave a comment:
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Re: Koban - Current Clamp Meter - DMM
Thank you,
CHX ... one more letter or number in Koban_1.JPG
I can't find PDF with that reference.
Thank
Ruy...Leave a comment:
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Koban - Current Clamp Meter - DMM
The factory / reseller ... don't know anything about the device (Schematic, Service manual, etc) and I need to repair this DMM - Clamp Meter.
2TY - Transistor - Q5 (Diode mode ok)
CHX ??? 5 Pins - U3
C31 ??? Burn,
Tested - V, Ohm, Diode, ºC ... don't see any errors
Thanks in advance for all info
Ruy... -
Re: Grundig CUC120 CRT TV
Thank you.
Please your comments:
Brightness and Colour Pot.: OK
But Contrast Pot.: I can' rise
no FOCUS and
washed out -> I only see a Blank RASTER.
Best Regards,
RuyLast edited by neuron; 11-29-2019, 06:20 AM.Leave a comment:
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Re: Grundig CUC120 CRT TV
Thank you for your comments, info.
Works
Brightness and Colour Pot.: Min -> Max OK
Contrast Pot.: Min -> middle ok
But I can' rise
If I push this Pot. the image:
large ...
no FOCUS and
washed out -> I only see a Blank RASTER.
Note: This Model and CUC220, CUC720 almost identical
Best Regards,
RuyLast edited by neuron; 09-25-2019, 10:26 AM.Leave a comment:
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Re: Grundig CUC120 CRT TV
Thank you for your comments, info.
In Sch. is 24V ... ? But in C2762 is 26V?
OK
And the rest ... points ...
In X = 108 V
1) T2566, T2567, T2568 -> T2566, T2576, T2586
Ok I will check.
2) My Mult. have Max, Min, and Crest.
The Var. is 1, 2V in +C, +A ... mV in +M, +B, +G
3) Tested R392, R393, R394, R396.
4) Yes several, but no Isolation Transformer in this House/Lab
Best Regards,
R...Leave a comment:
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Re: Grundig CUC120 CRT TV
NOTE: I would like to edit the msg but it's not possible.
In Pag. 1, I try test point R, A, D ... with multimeter
but as you can see in pic 35 and 36, large spikes.
So the RMS is different from the values.
What is the Procedure?
Thank you,
RuyLeave a comment:
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Re: Grundig CUC120 CRT TV
Thank you for your comments, info.
In Pag. 6 ?
T256X, T257X, T258X - Amplif.
+C +200V,
T2597, C259X, R259X, D2599? or
Contrast - T2533, SSB and SB and all this part ... what is function, purpose?
In manual I can't see the procedure to setup this Pots.
Best Regards,
Ruy...Leave a comment:
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Re: Grundig CUC120 CRT TV
This is a Super Color A 7100
The other sub-models in pag.1 - pdf
right bottomLeave a comment:
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Grundig CUC120 CRT TV
Hi,
I have CUC120 CRT TV to repair:
elektrotanya.com/grundig_cuc120.pdf/download.html
The screen is black ... and we notice from time to time (when
the image is very brig.) some small part of image.
Very few dots.
I tested the G1 2X V , G2 5XX V , Heather, Power Suply ...
Thank you,
Ruy -
Re: Oscilloscope UNAOHM G4020 = BECKMAN 9020
It's working and calib.
Thank you for all info and support,
RuyLeave a comment:
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Re: Oscilloscope UNAOHM G4020 = BECKMAN 9020
Thank you
In local stores:
MOTIP
[url]https://www.motip.com/products/motip/industry/professional-technical-solutions/contact-cleaner/[/url]
[url]https://www.wd40specialist.com/products/contact-cleaner[/url]
[url]http://cyclo.com/cyclo_product/break-thru-electronics-cleaner/[/url] 87
[url]http://cyclo.com/cyclo_product/break-thru-energized-circuit-contact-cleaner/[/url] 85
Any use in your equip.?Re: Oscilloscope UNAOHM...Last edited by neuron; 08-17-2018, 06:34 AM.Leave a comment:
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Re: Oscilloscope UNAOHM G4020 = BECKMAN 9020
What you use? brand model
And eccerr0r in 2465 ... Tek 2440?...Leave a comment:
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Re: Oscilloscope UNAOHM G4020 = BECKMAN 9020
bad/dirty contacts,
Inside ... pot, potentiometer ... switch contacts,
carbon pelic.
Thank you eccerr0r...Leave a comment:
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Re: Oscilloscope UNAOHM G4020 = BECKMAN 9020
Clean the front panel - Knobs, Handles, Pulls and Switches what you suggest?
And you have videos ?
Or text explan the process ?...Leave a comment:
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Re: Oscilloscope UNAOHM G4020 = BECKMAN 9020
Amazing DataBase !!!
And Tek is Up and Running?
Thank you
With Acetone, Benzine, Konkat ...?...Leave a comment:
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