MODULE Replacement CMU
1100.4903.82 3.28 E-4
Replacing the Memory Modules in the FRONT MODULE
(see chapter 5, spare part list, Current No. 470 or 480 (MODEL 04)
Current No. 475 or 485 (MODEL 12) and explosion drawing 1090.9244.01 D sheet 2/3)
The memory modules are incorporated in the FRONT MODULE. The FRONT MODULE CONTROLLER
features two SIMM-72 slots, in each of which up to 32 MB memory can be fitted (MODEL 04) or two
SODIMM-144 slots, in each of which up to 64 MB memory can be fitted (MODEL 12). The BIOS
automatically detects the size of the memory modules. For replacement proceed as follows:
Opening the instrument and removing the FRONT MODULE
½ Switch off the instrument, pull the power plug, unscrew the rear-panel feet.
½ Place the instrument onto the front carrying handles, push the tube upwards and take off.
½ Unscrew the four screws of the front handles from the instrument frame on both sides and take off
the front handles.
½ Unscrew a countersunk screw (if present) at the front on the labeling panel next to the spinwheel and
pull off the labeling panel towards the front.
½ Unscrew two countersunk screws in the front frame at the top and at the bottom as well as two
countersunk screws at the front above the AUX1/2 BNC connectors.
½ Unscrew a combi screw at the top of the module support for support of the Option FLOPPY DISK
DRIVE CMU–U61 or PCMCIA INTERFACE.
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 Slightly push the FRONT MODULE from the rear to the front using little pressure.
Note: Note the connecting cables for the Option FLOPPY DISK DRIVE CMU–U61 or PCMCIA
INTERFACE that are still connected to the MOTHERBOARD1.
½ After sliding out the FRONT MODULE disconnect the respective connecting cable for the option from
the MOTHERBOARD as follows:
• Option FLOPPY DISK DRIVE CMU–U61: The connecting cable is a film cable.
½ Lift the locking bracket of the connector on the MOTHERBOARD1 and remove the film
cable.
• PCMCIA INTERFACE: The connecting cable consists of three ribbon cables.
½ Disconnect the three ribbon cables from the MOTHERBOARD1 connector.
½ Take the FRONT MODULE completely out of the CMU.
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