Rohde & Schwarz SMU200A - Replacing the Motherboard (A100); Installing the New Motherboard; Removing the Motherboard

Module Replacement R&S SMU200A
1007.9845.82 3.62 E-6
Replacing the Motherboard (A100)
(See chapter 5, spare parts list 1141.2057.01, A100, parts list and drawing 1141.2005.01)
The motherboard is fitted at the bottom side and establishes all connections between the modules.
Caution!
The motherboard contains an EEPROM with all the specific data like serial number,
software options and correction data of the instrument. After replacement, the data
and correction tables have to be restored. This can only be done in the factory.
Without this data, the instrument will not operate correctly!
Removing the Motherboard
 Remove all boards.
 Remove the front panel.
 Pull out all air baffles towards the top of the instrument.
 Disconnect all cables from motherboard to components (attenuators, fans, etc).
 Remove all cable fasteners of the rear panel connections.
 Loosen all screws fixing the motherboard (8 x 1148.3059) at the bottom side.
 Take out the motherboard by carefully swaying it to the bottom side.
Installing the New Motherboard
 Install the motherboard into the instrument in the reverse order.
Note: Be careful when installing the motherboard in order not to cause damage to any
components.
Make sure to connect the cables according to their labelling.
 Insert the front module controller, front panel, power supply, boards and cables in the reverse order.
 After replacement, device-specific data and correction tables must be restored. This can only be
done in the factory.