Rohde & Schwarz 1164.4391.03, Service Manual

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Module Replacement R&S FSP
1164.4556.82 3.36 E-1
Replacing the RF Frontend A100
(See chapter 5, spare parts list, item 100, and explosion drawing 1164.4391.)
The RF Frontend is installed in the middle 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 RF Frontend 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 two countersunk screws (260) and three
countersunk screws (250).
Push the tube (410) on the instrument and mount the 4 rear-panel feet (450).
A cold boot is necessary after replacing the frontend.
See section "Performing a Cold Boot" in this chapter.
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 ]
Start selftest and check results:
- [ SETUP : SERVICE : SELFTEST ], then [SELFTEST RESULT]
Start a total calibration and check the result:
- [ CAL : CAL TOTAL ] , then [ CAL RESULTS ]
Check frequency response with chapter 1 and make a correction if necessary, using the correction
software.
Create a backup of the EEPROM data (see chapter 2, section "Adjustment of Module Data").