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Instrument Construction and Function Description
R&S ZVB
1145.1078.82 3.50
E-4
Replacing Network Controller Board A130, A140
(See Chapter 5, Spare Parts List, Items 100, 105 and drawing1145.1010)
The board is in the upper section of the instrument.
Opening the instrument and removing the board
Turn off the instrument and disconnect from the mains, screw off the 4 rear-panel feet (460) and
pull off the enclosure (400) backwards.
Lift off the instrument top cover (296) after undoing the 23 (2 ports) or 28 (4 ports) countersunk
screws (298).
Extract the network controller using the ejector lever
Fitting the board and reassembling the instrument
Fit the new board in the instrument.
Refit the top instrument cover (296) with 23 (2 ports) or 28 (4 ports) countersunk screws (298).
Slide the enclosure (400) back on and screw the 4 rear-panel feet (460) into position.
Connect the mains cable and turn on at the mains switch. The instrument is now in the standby
mode
Select Service Level 2 (see Service Functions).
When the instrument has been started, check the protocol file for errors:
[ INFO : Error Log ]
Record the receiver correction data (see
Recording Correction Values
).
Perform factory system error calibration (see
Factory System Error Calibration
).
Align the DC inputs (see
Aligning the DC Inputs
).
Содержание ZVB 14
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