Rohde & Schwarz FSP7 - Replacing the LCD and DC;AC Converter in the Front Module

Module Replacement R&S FSP
1164.4556.82 3.22 E-1
Replacing the LCD and DC/AC Converter in the Front Module
(See chapter 5, spare parts list, items 600 and 870, and explosion drawings 1164.4391, 1164.4404,
1093.4708.)
The LCD is accommodated on the mounting plate together with the associated DC/AC converter. It is
connected to the front module controller via cables, which can also be replaced individually. For
replacement proceed as follows:
Opening the Instrument and Removing the Front Module
 Switch off the instrument and pull the mains plug.
 Unscrew the four screws (430) of the front handles on both sides and take off the front handles.
 Remove the volume control knob (Option R&S FSP-B3), if present, by pulling it off.
 Pull off the labelling panel (270) towards the front.
 Unscrew two countersunk screws (610) in the front frame each at the top and at the bottom.
 Remove the front panel with keyboard and display (600, 620, 630, 640, 650, 660) to the front and
rotate it to the top of the instrument.
CAUTION
Note the connecting cables are still connected to the controller
 Pull off the connecting cables to the adapter board (LCD, DC/AC illumination converter), keyboard
membrane and spinwheel.
Note: When pulling off the connecting cables be careful with the cable connecting to the
keyboard. It is a film cable which can only be disconnected after sliding up the lock of the
film cable plug.
 Place the Front Module onto a clean surface.
Removing the DC/AC Converter
 Pull off the plug of the connecting cable to the DC/AC converter (870).
 Unplug the display cable (947) leading from the adapter board to the DC/AC converter (870) on the
converter.
 Unscrew the two screws (890) and remove the DC/AC converter (870) with the spacing pieces (900).
Removing the LCD
 Unscrew two screws with washers (950) and plug off the display cable (947)
 Unscrew the four screws at the display (930) and remove the display.