MODULE Replacement CMU
1100.4903.82 3.30 E-4
Replacing the LCD and/or DC/AC Converter in the FRONT MODULE
(see chapter 5, spare part list, LCD: Current No. 360/365, DC/AC Converter: Current No. 410/415 and
explosion drawing 1090.9244.01 D sheet 2/3)
The LCD is accommodated on the mounting plate of the FRONT MODULE together with the associated
DC/AC converter. It is connected to the FRONT MODULE CONTROLLER via cables, which can also be
replaced individually. For replacement proceed as follows:
Opening the instrument and removing the FRONT MODULE
½ Switch off the instrument, pull the mains plug and 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 at 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 MOTHERBOARD1 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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