Products > Test Equipment
TC1 lcr-meter transistor-tester fix
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gobi2000:

--- Quote from: madires ---Yes. that's an LGT8F328. Pin 21 is SWD which is also part of the SWD programming interface (Gnd, Vcc, SWD, SWC, Reset). Pin 21 of a genuine 32-TQFP ATmega328 would be Gnd.

--- End quote ---

Have you found the pin out of this PCB?
madires:
No, neither do I have that clone nor its schematic.
gobi2000:
I measured a capacitor, which was discharged behind the multi meter and is now dead, so I wanted to know if it had any protection.
Kim Christensen:

--- Quote from: gobi2000 on June 15, 2024, 03:29:38 pm ---I measured a capacitor, which was discharged behind the multi meter and is now dead, so I wanted to know if it had any protection.
--- End quote ---

If you have the same device as slash14 posted then the protection device is probably D2 on that PCB which is similar to the SRV05-4 by ON-semi. D1 also looks to be part of the protection circuitry.
SA:

--- Quote from: madires on May 29, 2024, 07:48:56 pm ---Have you already tried with U2 and D1 (weak input protection) removed?

--- End quote ---

Yes, I replaced the U2 and D1 is fine.After replacing it came to life but showing cell from 1-2 pin. The mcu also heating. So I have to replace the atmega328p. But I need the compiled code and Fuse bits. I will be greatful if you please help me. :)
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