Service manual

Service Manual Functional Verification 15
4. Turn on the power adapter’s power switch.
5. Check that the green LED on the power adapter turns on and that the green LED
charging indicator on the monitor’s right side panel turns on.
6. Disconnect the power adapter from the monitor. Check that the monitor’s green LED
charging indicator on the right side panel turns off.
7. Set the dc power supply meter to Volts and turn the power switch on; set it for
15.0V ± 0.1V.
8. Turn off the dc power supply.
9. Using the Welch Allyn dc power supply adapter cable, refer to the figure below for
polarity and connect the dc power supply to the monitor's dc input connector on the
right side panel.
10. Turn on the dc power supply.
11. Check that the green LED indicator lights up.
12. Switch the dc power supply meter to current and check that the current draw from
the supply is less than 1.8 A.
Caution In the next steps, carefully check for the proper polarity of the
connection between the power supply and the monitor. If voltage is applied with
the wrong polarity, it will open the right side panel fuse (F1). Refer to the figure
below to verify proper polarity.
Note
Initial charge current for a low battery is higher than for a charged battery. As the
battery charges, the current will decrease. The current draw may slowly drop the
longer the dc supply is connected to the monitor.
0696-02
RIBBED (+) SMOOTH (-)