Problem with multimeter DT9205A

[Automatics]

The problem is when it is on continuity mode on the display shows reading 393 beeper still works but I cant test leds. On 20kΩ/200kΩ display shows 2.40/02.4. The problems appear when accidentally when it was on continuity mode my dad used it in a 220 AC curcuit. I opened it but didn't saw any obvious damages. Any idea how can I fix it or what is wrong with it. Thanks!

 

[PETERDECO]

Welcome to the forum. Something must be toasted inside but not visibly. For less than $10 you can buy a new one.
https://www.ebay.com/itm/3239586558..._ge9LuPldMPl9AzDe5A6FWF3vWHLiWeRoCjisQAvD_BwE

 

[Automatics]

Yeah I know I can buy new one cheap but I was wondering if someone had an idea what could be

 

[Allen Bong]

Here is the schematic of your digital meter meter...

Since you said that your dad connected the probe to AC on the continuity test mode, I'd check all the components connected to point "J" like ptc1 and ptc2, 900K and 100K resistors etc.. IC2b and IC2c (LM324) are probably also gone as well.

 

[Riyadh1959]

Hi every one

The problem is when it is on continuity mode on the display shows reading 180 beeper still works but I cant test leds. On 20kΩ/200kΩ display shows 2.40/02.4 . Any idea how can I fix it or what is wrong with it. Thanks!

 

[73's de Edd]

Riyadh1959 . . . . . . is you also being . . . . . . Automatics . . . . . . .or has he permanently left the arena . . . . .along with Elvis ?

 

[Riyadh1959]

Riyadh1959 . . . . . . is you also being . . . . . . Automatics . . . . . . .or has he permanently left the arena . . . . .along with Elvis ?

I had same problem with referent number?

 

[73's de Edd]

Try the voltmeter functions and see how accurate they are.

 

[Riyadh1959]

Try the voltmeter functions and see how accurate they are.

Try the voltmeter functions and see how accurate they are.

When I test the led food it must be light but it don't ?

 

[Riyadh1959]

When I test the led diod it must be light but it don't ?

 

[73's de Edd]

We know that . . .that's understandable, BECAUSE the diode test function has BLOWN UP ancillary parts within it and 240mv is borderline of being able to light up even the lowest threshold of LED . . . the RED LED.
Come back with the requested functionality and accuracy test of the voltmeter portion of the unit.