Service manual

ELI 250/210__________________________________________________________________________
6-2
Unit turns on, no waveform is displayed but function key options are displayed.
Press any key on the keyboard, if no response there is a possible communications problem between front end board
and motherboard.
1) Replace cable between front end and motherboard.
2) Replace front end board
3) Replace motherboard
No keyboard functions and LCD is frozen
Note: It is possible that the LCD may be active but not receiving new data
There is a software problem.
1) Remove AC power from the unit.
2) Press and hold the On/Off key for 10 seconds. Unit should turn off.
3) Wait 10 seconds then turn the unit on again. Unit should start to respond correctly.
Or
1) Remove AC power.
2) Remove battery fuse from unit and leave out for 10 seconds.
3) Install battery fuse.
RS-232 Transmit/Receive Problems
Make sure that the baud rate set in the configuration matches that of the system that is being transmitted to or
received from. If the baud rate is set correct there is a problem with either the transmission cable or the RS232
portion of the motherboard and the motherboard should be replaced.