Replacing Af Demodulator A190 (Option R&S Fsp-B3) - Rohde & Schwarz FSP3 Service Manual

R&S FSP
Replacing AF Demodulator A190 (Option R&S FSP-B3)
(See chapter 5, spare parts list, item 1000, and drawing 1164.4391.)
The board is fitted the front part of the instrument.
Opening the Instrument and Removing the Board
Switch off the instrument, pull the mains plug, unscrew the 4 rear-panel feet (450) and push the tube
(410) backwards and take off.
Unscrew the two countersunk screws (260) at the top of the instrument and the three countersunk screws
(250) at the fan side, lift the cover at the top (240) of the instrument to the left side and take off.
Place the instrument on the left side frame and loosen all connecting cables to the board.
Push out board to the top side of the instrument.
Note: The board can be moved up by pressing carefully from the downside through the
connector wholes in the motherboard against the board.
Installing the New Module and Completing the Instrument
Plug the new board into the instrument and reconnect all cables to the board.
Note: Please refer to the cable wiring drawing on the motherboard.
Put the top cover (240) on the instrument and mount it with 3 countersunk screws (260) and 2
screws with washer (250).
Push the tube (410) on the instrument and mount the 4 rear-panel feet (450).
Connect the instrument to the mains, switch on the instrument power switch and switch on the
instrument with the ON/STANDBY key
After starting the instrument check for system messages:
- [ SETUP : SYSTEM INFO : SYSTEM MESSAGES ]
Test the function of headphone connector and volume control.
Create a backup of the EEPROM data (see chapter 2, section "Adjustment of Module Data").
1164.4556.82 3.53
Module Replacement
E-1