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| Hioki 3237 5.5 digits meter teardown |
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| fzabkar:
--- Quote from: coromonadalix on October 29, 2023, 01:58:03 am ---Eeprom i think : 8 pins Soic 3771 if someone find a datasheet ??? i could try to read it ? 0026 343 --- End quote --- MB3771 power supply monitor: https://www.mouser.com/datasheet/2/100/002-08511_MB3771_Power_Supply_Monitor-931495.pdf |
| coromonadalix:
could be that one THKS if it is, i dont see on the pcb where the calibrations would be stored, unless it's directly in the mcu ???? :-+ |
| fzabkar:
H8S/2138 Group, H8S/2134 Group, H8S/2138F-ZTAT™, H8S/2134F-ZTAT™, H8S/2132F-ZTAT™ Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series https://www.renesas.com/document/man/h8s2138-group-h8s2134-group-h8s2138f-ztat-h8s2134f-ztat-h8s2132f-ztat-hardware-manual I think I can see a NiCad (?) battery on the PCB. Maybe the settings are stored in RAM??? |
| coromonadalix:
no sorry loll the green one is a capacitor ... or a mov due to its thickness, but an input part you see a line of resistors / voltage divider and the black round thing 5A1 marking is the buzzer, had to put a tape on it, very loud loll |
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