Removing The Lcd And/Or Dc/Ac Converter; Installing The New Lcd And/Or Dc/Ac Converter And Completing The Instrument; Putting Into Operation - Rohde & Schwarz CRTU-RU Service Manual

Radio Unit R&S
CRTU-RU

Removing the LCD and/or DC/AC Converter

Unscrew the two screws of the DC/AC converter shielding and pull off the plug of the connecting
cable to the DC/AC converter.
If required, unscrew the two screws of the DC/AC converter and loosen the connecting cable to the
FRONT MODULE CONTROLLER.
Remove the DC/AC converter.
Loosen the four screws of the LCD shielding and take off the shielding.
Loosen the connecting cable to the FRONT MODULE CONTROLLER by unscrewing the two screws
and remove.
Unscrew the four screws of the LCD on the mounting plate and remove the LCD.

Installing the new LCD and/or DC/AC converter and completing the instrument

Insert new LCD and/or DC/AC converter in the reverse order, connect all connecting cables in the
correct position and replace all screws.
Carefully plug the cable connectors to the controller board without reversing the polarities and
replace the mounting plate in the reverse order.
Replace the old PCMCIA INTERFACE in the FRONT MODULE in the reverse order.
Note: Make sure to route the cables of the PCMCIA INTERFACE properly, not to catch them and
insert them on the MOTHERBOARD before sliding the FRONT MODULE completely into
the CRTU Radio Unit.
Complete the instrument without causing damage to the cables.

Putting into operation

Connect the instrument to the mains and switch on.
The built-in front-module controller registers on the LCD and starts the operating software.
1140.0050.82 3.29
Module Replacement
E-4