R&S SMB Troubleshooting
1407.0806.82 3.23 E-6
blown after two minutes and the display is not working the display is defective. If the RF Board is equipped
with the Reference Oscillator B1 remove this unit first (see page 3.57). Now repeat the fuse test by first
adding the connection to the RF Board and then adding the Reference Oscillator B1. The module causing
the blown fuse is defective.
Fuse Type R&S Part Number Manufacturer Part Number
F3 T5A 1090.4442.00 Littlefuse R452.005 NRL (MRL)
F4 FF10A6104.9199.00 Littlefuse R452.010 NRL (MRL)
F5 T5A 1090.4442.00 Littlefuse R452.005 NRL (MRL)
F6 T5A 1090.4442.00 Littlefuse R452.005 NRL (MRL)
F7 FF10A6104.9199.00 Littlefuse R452.010 NRL (MRL)
F9 T5A 1090.4442.00 Littlefuse R452.005 NRL (MRL)
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