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Author Topic: My Siemens Multimeter B 1028  (Read 2038 times)

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Offline ac_dcTopic starter

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My Siemens Multimeter B 1028
« on: August 19, 2018, 07:53:28 am »
Hello dear people,

I have a Siemens B1028 which is unfortunately defective ... no display, nothing ...
The first observations have shown that possibly the power supply or the voltage control are out of action.
Unfortunately, I do not have a schematic, so I am currently in the dark.  8)  Does anyone know the device or can possibly help me with documents?

Many Thanks!
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Offline ac_dcTopic starter

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Re: My Siemens Multimeter B 1028
« Reply #1 on: August 19, 2018, 08:04:51 am »
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Offline ac_dcTopic starter

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Re: My Siemens Multimeter B 1028
« Reply #2 on: August 19, 2018, 08:07:10 am »
Sorry, the 2nd Picture...
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Offline ac_dcTopic starter

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Re: My Siemens Multimeter B 1028
« Reply #3 on: August 20, 2018, 04:21:17 pm »
Does anyone know the DMM?
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Offline retiredcaps

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Re: My Siemens Multimeter B 1028
« Reply #4 on: August 21, 2018, 01:30:41 am »
Not familiar at all with this meter, but if you have no display, I would trace out the + battery to the main IC.  Perhaps there is a datasheet for the main IC?

If not, see if the crystal/clock is running.
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Offline ac_dcTopic starter

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Re: My Siemens Multimeter B 1028
« Reply #5 on: August 21, 2018, 10:07:10 pm »
I've looked and the IC is a NORMA MCC2 (more names on the block AMS 9335 WAE ... so I have not found anything on the web). What I still notice is: the current needle of the dispaly on the laboratory power supply fluctuates ... a kind of pumping ( the multimeter is connected to a laboratory power supply ).
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Offline ac_dcTopic starter

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Re: My Siemens Multimeter B 1028
« Reply #6 on: August 22, 2018, 03:23:11 pm »
I now have the actual controller and that is the NEC D75P316GF. I will now check whether the oscillator works, the operating voltage is in order ... for the beginning
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Offline ac_dcTopic starter

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Re: My Siemens Multimeter B 1028
« Reply #7 on: September 12, 2018, 08:08:38 am »
Anyone else with the device maybe?  :scared:  :bullshit:
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