Nellcor OxiMax N 5500, Руководство по обслуживанию, Страница: 47 / 101

Troubleshooting
40 N5500 Service Manual
Default Settings and
Troubleshooting
5.5.2 Display
Table 15 lists symptoms of problems relating to non-functioning displays, and
recommended actions. If the action requires replacement of a PCB assembly or module,
refer to Disassembly Guide.
Table 15. Display
Symptom
Recommended Action
1. LCD screen is totally
black after system
powers-up. 1. Ensure backlight wire is connected to backlight inverter.
2. Ensure backlight inverter wire is connected to Main PCB
assembly.
3. Ensure Booting Mode Selector is set to ’NORMAL’.
4. If the problem persists, replace LCD cable.
5. If the problem persists, replace backlight inverter.
6. If the problem persists, replace Main PCB assembly.
7. If the problem persists, replace LCD panel.
2. LCD screen is
illuminated, but no data
is visible after system
powers-up. 1. Ensure backlight wire is connected to Main PCB assembly
and backlight inverter.
2. Ensure LCD cable is connected to Main PCB assembly and
LCD panel.
3. If the problem persists, replace LCD cable.
4. If the problem persists, replace Main PCB assembly.
5. If the problem persists, replace backlight inverter.
6. If the problem persists, replace LCD panel.
3. LCD screen has data,
but is not illuminated
after system powers-
up. 1. Ensure backlight wire is connected to Main PCB assembly
and backlight inverter.
2. Ensure LCD cable is connected to Main PCB assembly and
LCD panel.
3. If the problem persists, replace Main PCB assembly.
4. If the problem persists, replace backlight inverter.
5. If the problem persists, replace LCD panel.
4. Display values are
missing or erratic 1. If the measurement cables are connected, ensure that the
cables are properly connected.
2. If the problem persists, replace the measurement cables.
3. If the problem persists, replace LCD cable.
4. If the problem still persists, replace Main PCB assembly.
5. If the problem still persists, replace ECG PCB assembly.
6. If the problem still persists, replace SpO
2
PCB assembly.
5. Display pixels do not
light. 1. Check the connection of Main PCB assembly.
2. If the problem persists, replace LCD cable.
3. If the problem still persists, replace Main PCB assembly.
4. If the problem still persists, replace LCD panel.