Philips M3921A, Service Manual

Page: 23 / 150

Performance Tests
Performance Verification 11
Performance Tests
The battery charge and battery performance test should be performed before
monitor repairs whenever the battery is suspected as being a source of the
problems. All other tests can be used following repairs or during routine
maintenance (if required by your local institution). Before performing the
battery performance test, ensure that the battery is fully charged. (See
“Battery Charge”
below).
This section is written using factory-set power-up defaults. If your institution
has pre configured custom defaults, those values display.
Battery Charge
To fully charge the battery:
1. Connect the monitor to an AC power source using the proper power cord. For
the A1, use the PS-120V or PS-240V external power supply and power cord.
2. • For the A1, verify that the
EXTERNAL POWER
indicator is
lit.
• For the A3, verify that the
BATTERY CHARGING/AC SOURCE
indicator is lit.
3. Charge the battery for at least 8 hours.
The battery can require a complete discharge/charge cycle to restore its normal
capacity, depending on its previous usage.
4. To check for a full charge, perform the procedure described in “Battery
Performance Test” on page 12.