Power Supply; Testing The Battery; Replacing The Battery (Model 4620) - AEMC 4620 User Manual

Ground testers

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■ To access the two connectors (9) linking the power supply and display boards

together, lift up the cover of the internal unit. Once these connectors are free,

it is possible to completely pull away the bottom part from the cover.

■ The display board (7) is connected to the front plate.

■ The power supply board (8) is connected to the bottom of the body.

To free the display board from the cover:

■ Remove the 3 Phillips screws and unsolder all the wires connecting to the

terminals and to the fuse.

To free the power supply board from the bottom of the body:

■ Remove the 6 Phillips screws at the back of the body and disconnect the

connector coming from the battery.

6.3 POWER SUPPLY

■ Short-circuit the X and Z terminals.

■ Press the "TEST" button.

■ If the low battery or charge indicator lights up on the display, you will need to

replace or recharge the batteries.

■ Detach the four screws on the bottom of the yellow case.

■ Remove the shell and front panel assembly.

■ Unscrew the two fastening screws on the battery compartment.

■ Remove the cover.

■ Remove the 8 batteries and replace them.

To replace the batteries with rechargeable cells (1.2V - 2 Ah or above, NiCd or

NiMH of the same size):

■ Remove the plug under the batteries.

■ Set the switch to the position: NiCd/NiMH.

■ Replace the plug.

■ Insert the 8 rechargeable cells.

Digital Ground Resistance Tester Models 4620 & 4630

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4630