Siemens Nixdorf MX300 Series, Operating Manual

Page: 136 / 178

System unit controls
’PS1’ LED
Power supply (1). This LED lights when the system unit is on.
’PS2’ LED
Power supply (2). This LED lights when the system unit is on (not all models).
’DIAG’ button
Used for diagnostic purposes. If a system dump is required, press first the ’DIAG’
and then the ’RESET' button.
’RESET’ button
Press only in the event of faults (see "Troubleshooting" page 47); otherwise data
may be lost.
’ERROR’ LED
This LED lights up if, for example, a hardware fault occurs during power-up.
Two-digit display
Operating status. When the yellow ERROR LED comes on, the error is indicated here
in coded form. While the operating system is running, a cyclic count is performed.
The count rate depends on the system load. The display is static when the system
load is high.
Floppy disk drive
The floppy disk drive is described in detail in the section entitled "External data
media" on page 59.
Floppy disk access LED
This LED comes on when the system accesses the floppy disk.
Tape cartridge drive
The tape cartridge drive is described in detail in the section entitled "External data
media” on page 59.
Tape cartridge drive access LED
This LED comes on when the system accesses the tape cartridge.
42 U6389-J-Z146-4-7400