Multimeter Excel DT9205A Calibration

[Zmint]

Hello guys I have this Multimeter Excel DT9205A which needs a little calibration.
There is very slight reading variation in DC Voltage measurement.
1) Checking the actual PCB (1st Picture Below), I notice it has 3 Preset (Trimpot).
2) I found a reference SCHEMATIC (2nd Picture) posted by @73's de Edd in the post https://www.electronics-lab.com/forums/threads/multimeter-dt9205a-problem.269737/post-1785962

Please help me choose the correct VR (Preset/Trimpot) to calibrate DC Voltage.
Thanks.

1) Actual PCB



2) Reference SCHEMATIC

 

[bertus]

Hello,

The potmeter marked with V1 (201) is the genaral scale calibration.
The potmeter marked with 301 is for AC calibraton.
The pormeter marked with 202 is for calibrating the capacitor measurement.

Bertus

 

[Zmint]

Hello,

The potmeter marked with V1 (201) is the genaral scale calibration.
The potmeter marked with 301 is for AC calibraton.
The pormeter marked with 202 is for calibrating the capacitor measurement.

Bertus

Does this mean
Adjusting V1 (201) will effect all the reading of the multimeter ?
Adjusting V3 (301) will only effect the AC DC Reading ?

 

[bertus]

Hello,

Yes, V1 (201) will effect all readings.
V3 (301) has only effect on AC readings and can be adjusted after V1.

Bertus