Check the "R1" or "R2" positions near the input.
A 7-segment display driven directly by the main IC. dt830d digital multimeter circuit diagram pdf download
This part uses a high-impedance voltage divider. It scales high voltages down to the 200mV range that the ICL7106 can process. 2. Resistance Measurement Check the "R1" or "R2" positions near the input
Usually an ICL7106 or a "COB" (Chip-on-Board) equivalent. dt830d digital multimeter circuit diagram pdf download