Rohde & Schwarz 1164.4391.03, Service Manual

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R&S FSP Module Replacement
1164.4556.82 3.41 E-1
Replacing 8 GHz YIG Unit A161; R&S FSP7
(See chapter 5, spare parts list, items 2005, 2010, and drawing 1130.2544.)
The board is installed on the 8 GHz converter unit (1130.2544, 1130.2396.
Note: Only the YIG units (with YIG filter, cable, sheet metal part) are replaced. The interface is
thus always the same when using other YIG filters.
Removing 8 GHz YIG Unit on MW Converter 1130.2544
Remove 8 GHz converter unit (130).
Note: See description "Replacing MW Converter Unit A160."
Remove the two module covers by undoing the screws from the bottom of the module.
Disconnect cable W1 from the diplexer (2030) and cable W2 from the 8 GHz converter circuit
(2000).
Depending on the YIG unit used, disconnect cable from YIG filter at X4.
Undo 2 countersunk screws (2025).
Remove the complete YIG unit (2005 or 2010).
Note: YIG Unit 1130.2944.02 (2005) is connected to the PCB via contacts. Remove the YIG unit
towards the top perpendicularly to the PCB.
Installing 8 GHz YIG Unit on MW Converter 1130.2544
Put the new YIG unit (2005 or 2010) onto the PCB.
Note: YIG Unit 1130.2944.02 (2002) is connected to the PCB via contacts. Plug YIG unit into
connector contacts from the top perpendicularly to the PCB.
Fasten YIG unit with 2 countersunk screws (2025).
Screw on cable W1 to the diplexer (2030) and connect cable W2 to 8 GHz converter circuit (2000).
Depending on the YIG unit used, connect cable from YIG filter at X4.
Fit the module cover onto the top of the converter unit (positioning by means of adjusting pins). Turn
8 GHz converter unit upside down, fit module cover to the bottom side and refasten all screws.