R&S CMU MODULE Replacement
1100.4903.82 3.33 E-5
Replacing the Hard Disk in the FRONT MODULE
(see chapter 5, spare part list, Current No. 260 and explosion drawing 1090.9244.01 D sheet 3)
The hard disk is incorporated in the FRONT MODULE (MODULE 04) or outside on the back of the
aluminum panel of the FRONT MODULE (MODEL 12/22/23/24). For replacement proceed as follows:
Opening the instrument and removing the FRONT MODULE
Switch off the instrument, pull the mains plug and unscrew the rear-panel feet.
Place the instrument onto the front carrying handles, push the tube upwards and take off.
Removing the hard disk from the FRONT MODULE
MODEL 12, 22, 23, 24:
After unscrewing the two countersunk screws at the top left instrument frame, slightly lift the cover at
the top of the instrument, slightly shift towards the right and lift off.
Remove the ribbon cable from the hard disk to the FRONT MODULE CONTROLLER, unscrew the
two screws on the back of the aluminum panel of the FRONT MODULE and pull out the harddisk.
Unscrew the hard disk from the disk holder.
Installing the new hard disk
MODEL 12, 22, 23, 24:
Carefully fit the new hard disk, fasten with the four screws to the disk holder. Insert the hard disk
with the disk holder on the back of the aluminum case of the FRONT MODULE. Be careful with the
lower cover plate locking in the concerning opening.
Connect the ribbon cable to the FRONT MODULE CONTROLLER. Fit the disk holder with two
screws to the aluminum panel of the FRONT MODULE.
Note: The hard disk is an IDE hard disk which can be obtained under R&S spare part list, Current
No. 260. It is already formatted for the R&S CMU and contains the operating system.
Complete the instrument without causing damage to the cables.
Putting into operation
Connect the instrument to the mains and switch on: The built-in FRONT MODULE CONTROLLER
registers on the LCD. The BIOS is factory-set to the R&S CMU, the new hard disk is automatically
detected.
Install the new software (see chapter 4, Firmware update).
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