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R&S ZVB
Instrument Construction and Function Description
1145.1078.82 3.37
E-4
Replacing a Fan
(See Chapter 5, Spare Parts List, Item 15 and drawings 1145.1010, 1145.1290, 1145.1332)
The fans, three in all, are located behind the right-hand side panel.
Opening the instrument and removing the fan
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 top instrument cover (296) after undoing the 23 (2 ports) or 28 (4 ports) countersunk
screws (298).
Remove the 4 screws in the front handles (410), right and left, and take off the front handles.
Remove 3.5 mm connection cables (only with option R&S ZVBx-B16)
Remove the countersunk screw (390) next to the display and pull off the front cover (300 to 330)
forwards
Remove the 2 countersunk screws (610) in the top of the front frame and the 2 in the bottom.
Remove the countersunk screws (176) (4 ), (177) (6 ), (178) (8)
Pull out the front unit together with the keyboard and display (600, 601, 602, 603) forwards.
Disconnect the fan cable on the motherboard X35, X36 and X37 (FAN).
Undo the 2 screws (19) and the 5 screws (17) and remove fan plate (50) with the 3 fans (15).
Remove fan (15) by undoing the 4 fan screws (18).
Fitting a new fan and reassembling the instrument
Install the fan using the 4 fan screws.
N.B.:
The arrows on the fan show the installation position. The fan blows air into the instrument.
Route the fan cable so that it cannot get caught in the fan.
Reinsert the fan plate with the 3 fans on it into the instrument and secure with 2 screws (19) and 5
screws (17).
Connect the fan cabling on the motherboard X35, X36 and X37 (FAN).
Reinsert the front unit into the instrument and secure to the front frame with 4 countersunk screws
(610).
Refit the countersunk screws (176) (4), (177) (6 ), (178) (8).
CAUTION
Avoid trapping cables and ensure cabling is tidy.
Replace the front cover (300 to 323) and secure with the countersunk screw (390).
Reconnect the 3.5 mm connection cables (only with option R&S ZVBx-B16)
Refit the 2 front handles (410) using 4 screws.
Refit the top instrument cover (296) with 23 (2 ports) or 28 (4 ports) countersunk screws (298).
Connect the mains cable, turn on at the mains switch and press the ON key.
Check that all three fans are operating correctly (fans are blowing air into the instrument).
Turn off the instrument and disconnect the mains cabling again.
Содержание ZVB 14
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