Difficulty

Moderate

Steps

5

Time Required

                          10 - 15 minutes

Sections

1

  • Velleman DVM850BL Digital Multimeter Teardown
  • 5 steps

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Introduction

What you need

Step 1

              Removing Leads
  • Remove lead connectors from front panel.

Remove lead connectors from front panel.

1024

Step 2

              Remove Back Casing Screws
  • Turn over the DVM and unscrew the two screws using a J1 bit.

Turn over the DVM and unscrew the two screws using a J1 bit.

Step 3

              Battery and PCB Screw Removal
  • Remove battery by gently disconnecting it from connector.
  • Remove three screws using J1 bit.

Remove battery by gently disconnecting it from connector.

Remove three screws using J1 bit.

Step 4

              PCB Removal
  • Remove PCB by gently pulling it away from the back encasing.
  • Microprocessor
  • Continuity Check Speaker
  • Fuse
  • 9 V Battery Connector

Remove PCB by gently pulling it away from the back encasing.

Microprocessor

Continuity Check Speaker

Fuse

9 V Battery Connector

Step 5

              Complete The Teardown
  • Remove the knob and buttons from the front grey casing.
  • The measurement knob uses two ball bearings that allows the knob to rotate. These bearings are small and easy to lose.
  • Backlight Toggle Button
  • Measurement Hold Button
  • LCD Plastic Cover
  • Measurement Select Knob
  • Measurement Select Knob Ball Bearings
  • Success! You have finished tearing down the multimeter.

Remove the knob and buttons from the front grey casing.

The measurement knob uses two ball bearings that allows the knob to rotate. These bearings are small and easy to lose.

Backlight Toggle Button

Measurement Hold Button

LCD Plastic Cover

Measurement Select Knob

Measurement Select Knob Ball Bearings

Success! You have finished tearing down the multimeter.

Cancel: I did not complete this guide.

Author

                                      with 2 other contributors 


                    Michael

Member since: 01/23/2014

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Team

                       Cal Poly, Team 10-32, Maness Winter 2014                        

                                                  Member of Cal Poly, Team 10-32, Maness Winter 2014 



                    CPSU-MANESS-W14S10G32                     


                                            4 Members                     


                                            6 Guides authored

Oliver Watson - Dec 14, 2016

Reply

Don’t take the contacts out of the rotary dial. It’s very easy to forget where they go

jaystuarthenderson - Jun 20, 2022

Reply

This web page seems very helpful. However is it necessary to remove the micro processor or front knobs and buttons if all is working fine? What meter do you use to check the fuse? This one when the battery is changed? LOL And why does the print and photos change size when I try to scroll down the page after I reset it to 100 % ? Am I using Windows 10 wrong? Thanks