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| SIEMENS B1023 (NORMAMETER MP14) from 1987 - Pictures, Teardown, Impressions |
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| reheld:
The schematic is freely available at the internet, even on this board: https://www.eevblog.com/forum/testgear/anyone-ever-used-an-old-siemens-b1022-rms-multimeter/msg531868/#msg531868 I have attached the MP13/MP14 schematic from Cymaphores MP14 manual, dumping the EEPROM from the connector should be possible and i assume it is the way the calibration was done at the factory. Pay attention when trying to repair one of those devices, there were multiple revisions of the main PCB, which can differ in detail from your actual board. For example you can see two fuses at the schematic (SI1 and SI3) there are early revisions which also have a third fuse (SI2 = 4A HRC). If you do not own the manual which was delivered with your device, try to validate which one it is matching, you can also find an other version of the schematic for the old revision which has SI2 fuse. The connector is also used for connecting the interface module (rare piece of hardware, never seen one in real, only an blurry image on the web). The connector itself is a obsolete part from MOLEX and the pin pattern is rather unusual, the simplest way to dump the EEPROM would be using an IC clip. |
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