MODULE Replacement CMU
1100.4903.82 3.26 E-4
Removing the hard disk from the FRONT MODULE
MODEL 04:
½ Unscrew the two countersunk screws on the cover of the Option FLOPPY DISK DRIVE CMU–U61
or PCMCIA INTERFACE and carefully pull out the option from the FRONT MODULE towards the
front.
½ Place the FRONT MODULE onto a clean surface with the aluminum panel pointing downwards.
½ Unscrew the four screws on the mounting plate at the top, bottom and right and carefully swing away
the mounting plate towards the rear.
½ Pull off the connecting cables to the LCD, DC/AC illumination converter, keyboard membrane and
spinwheel.
Note: When pulling off the connecting cables be careful with the cable connecting to the
keyboard. It is a film cable which can only be disconnected after sliding up the lock of the
film cable plug. Besides, be careful with the ribbon cable connecting to the spinwheel. First
loosen the locking brackets of the plug.
½ Remove the ribbon cable from the hard disk to the FRONT MODULE CONTROLLER, unscrew the
four screws of the bracket through the rear of the aluminum panel and take out the hard disk.
MODEL 12:
½ 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.
½ 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 04:
½ Carefully insert the new hard disk, fasten with the four screws of the bracket through the rear of the
aluminum panel and connect the ribbon cable to the FRONT MODULE CONTROLLER.
Note: The hard disk is an IDE hard disk which can be obtained under R&S spare part list, Current
No. 490. It is already formatted for the CMU and contains the operating system.
½ Carefully plug the cable connectors to the controller board without reversing the polarities and
replace the mounting plate in the reverse order.
Only MODEL 04: Installing the option again and completing the instrument
½ Install the old Option FLOPPY DISK DRIVE CMU–U61 or PCMCIA INTERFACE in the FRONT
MODULE in the reverse order.
½ Then install the FRONT MODULE in the CMU in the reverse order.
Note: Make sure to route the cables of the Option FLOPPY DISK DRIVE CMU–U61 or PCMCIA
INTERFACE properly, not to catch them and insert them on the MOTHERBOARD1 before
sliding the FRONT MODULE completely into the CMU.
½ Complete the instrument without causing damage to the cables.
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