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Philips M3001A Service Manual Page 183

M3/m4 monitors,measurement server,measurement server extensions.
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Checks with the Instrument Switched On, AC connected, without Battery
• AC Power LED is on (green).
• After pressing the On-Off/Standby switch, the following sequence occurs:
Checks with the Instrument Switched On, AC connected, with Battery
The LEDs behave the same as described in the Checks with the Instrument Switched on, AC
Connected, without Battery (above) except that the Battery LED does the following:
Checks with the Instrument Switched On, AC not Connected, with Battery
The LEDs behave the same as described in Checks with the Instrument Switched on, AC
Connected, without Battery (above) except that the AC Power LED is permanently off.
Troubleshooting the Instrument
The On/Off LED switches on immediately.
The Alarm LED and the Suspend LED both switch on (red) and the Battery LED switches
on (yellow).
After 1 second, the Alarm LED switches to yellow then, after 1 second more, all three
LEDs (Alarm, Suspend & Battery) switch off.
As the LEDs switch off, the speaker test occurs with an audible tone.
Shortly after the LEDs switch off, the display backlight switches on and the M3 logo dis-
plays.
The Battery LED is initially on then switches first to yellow and then off for several sec-
onds.
Finally, the Battery LED switches to its current status-color.
Part 1 Troubleshooting Checklists
167

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