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Preventive Maintenance Tasks; M3046a; M3000a / M3001a; Replacing The Backlight Tube Assembly - Philips M3001A Service Manual

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Preventive Maintenance Tasks


Preventive maintenance for the Monitor comprises the following activities:
• Perform visual inspection (see"Inspecting the Instrument" on page 122)
• Replace the Backlight Tube Assembly (if required).

Replacing the Backlight Tube Assembly

The intensity of the fluorescent tube used for backlight illumination of the LCD Display
gradually decreases over time. As a result, periodic replacement is necessary.
Philips recommends replacement of the Backlight Tube Assembly after 3 years (20 000
hours) of continuous use or if there is noticeable decrease in the display illumination.
(Display illumination decreases by about half after 3 years of continuous use.) The procedure
for replacing the Backlight Tube Assembly is found in "Repairing the Instrument".
After fitting new tubes, go to Service Mode and reset the Backlight-Tube counter to zero.

M3000A / M3001A

NBP Calibration and Performance tests
The preventative maintenance for the Non-invasive blood pressure measurement consists of
the following tests:
• Accuracy Test
• Leakage Test
• Linearity Test
• Valve Test
The tests are described in "Testing the Instrument", see also "NBP Accuracy, Leakage,
Linearity and Valve Test" on page 146.
Maintaining the Instrument
Preventive Maintenance Tasks


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