Philips V24CT, V26CT manual Maintenance

Perform a

Start-up

Sequence

Test of the

System

Verify the

Integrity of

the Display

Monitor Maintenance

The System automatically starts every time the system is switched ON.

TEST - Turn the System On by pressing the power switch in the lower left- hand corner of the display.

RESULT - The system will click and light-up the LEDs on the control panel. After several seconds, the LEDs will go off and the display will start showing waveforms and numerics. If the system fails to boot, notify your biomedical department or the Philips representative.

Note the position of the contrast control on the V24 (or the brightness control on the V24C/V24CT/V26C/V26CT) before starting tests so that they are returned to their previous positions (assuming they are correct) at the end of the testing procedure.

1.	Set up an ECG signal from a fixed rate simulator on the screen.
2.	Check the ECG complexes. They should be regularly spaced.	Maintenance
	Uneven spacing indicates missing pixels. All portions of a simulated
	ECG waveform should be clear and visible, including the P wave
	and QRS.
3.	Adjust the contrast control on the V24 (or the brightness control on
	the V24C/V24CT/V26C/V26CT) so it is at the maximum setting and
	then adjust to the minimum setting.
4.	Check to see if any noise (interference) is superimposed on the
	baseline with the ECG simulator attached. Baseline interference
	may be apparent as a thick baseline at high gain settings.
5.	Apply an external 1 mV pulse. The trace should exhibit a leading
	edge with minimal rounding and a spike (or overshoot) of less than
	10%. After 1 second, the pulse should have decayed no more than
	half of its original amplitude.
6.	Return the contrast control on the V24 (or the brightness control on
	the V24C/V24CT/V26C/V26CT) to its previous position (assuming it
	was correct). If any problems are identified, notify your biomedical
	department or the Philips representative.

Maintenance 13-9