MK-328 LCR Tester dead?

[vinlove]

Tonight I was trying to test a new electrolyc capacitor, but it must have had some charge still left in the cap.
When connected it to the MK-328, and pressed the test button, but the MK-328 is not powering on.

I checked the DCV from the cap, and it was about 4V, and slowly discharging. But it could have been far higher DCV in there.
I forgot to discharge it before connecting it to the MK-328.

Is the MK-328 totally dead?  Have I just killed it with a DC charged capacitor? 
Is there any parts that can be replaced and repaired?
Or is it for the bin?

 I opened it up, and there is no fuse, and just 9V DC from battery to straight to the PCB, and some tiny dots of SD components and a tiny chip connected to LCD, and that is all there is to it.

Shame because it has been working well for about 5 years without fail.

Buying it again would be pain for the waiting time of delivery from China.

[vinlove]

This is exactly what what happened to my MK-328.
Only difference was mine never came back on even to flicker something on the screen.




Had to order a new one to replace the dead MK-328

[indman]

Is the MK-328 totally dead?  Have I just killed it with a DC charged capacitor? 
Is there any parts that can be replaced and repaired?
Or is it for the bin?

Everything can be repaired if you have sufficient skill and skills to repair such simple devices!
I drew an example circuit diagram of the MK-328 clone. Look at it carefully.
If you connected a capacitor with a charge, then first of all it is necessary to check the serviceability of the protective elements, the diode assembly U3 (SRV-05) and the suppressor D1. Remove them from the board and try poweron on the tester again.

[vinlove]

Thanks for the info and schematic.

Another things that happened with the MK-328 is that when I kept pressing the test button down for a few seconds to see if it will reboot, then it started smoking from the PCB.  I turned it over to see where the smoke was coming from, but it then stopped smoking.  I couldn't tell where it was, but could smell burns.

To be able to repair anything is always great feeling in Electronics. But not sure, if still there is a chance with this kit. Will give a try with the schematic and your info.

[Gyro]

It's probably the Atmel micro that has fried in that case. A lot of these testers, including the original design, do not have protection diodes. Replacing it and programming  should restore operation.