3. ADAPTOR TEST
The adaptor test checks that the adaptor gives 6.5 V + 10% on and off load with 240 V + 10% input. In the following test the adaptor is serviceable if the meter reads GREEN in all of the checks.
CAUTIONS:
DO NOT TOUCH VARIABLE TRANSFORMER OUTPUT WHEN DEVICE IS CONNECTED TO THE MAINS.
DO NOT CONNECT/DISCONNECT ADAPTOR FROM THE FLYING LEAD WHEN VARIABLE TRANSFORMER IS CONNECTED TO THE MAINS.
Procedure
- Connect adaptor jack to the test box.
- Connect the adaptor into the flying mains socket of the variable transformer (Item 12).
- Connect the adaptor jack to the test box (Item 13).
- Set the variable transformer to 90%.
- Plug in the variable transformer to the mains socket.
- Check that the needle on the test box meter is in the GREEN band.
- Press and hold the button on the side of the test box and check that the meter needle remains in the GREEN band. Release the button.
- Set the variable transformer to 110% (maximum) and check that the meter needle is in the GREEN band.
- Press and hold the button on the side of the test box and check that the meter needle is in the GREEN band. Release the button.
- Carry out the following:
- Disconnect the variable transformer from the mains.
- Disconnect the adaptor from the transformer and from the test box.