Emerson Process Management 7951 14.3 Switch Panel , 14.4 Processor Board

Chapter 14 Removal and replacement of parts
Page 14.2
14.3 Switch Panel
1. Remove the Front Panel Assembly as explained in Section 14.1
2. Undo the four screws and washers which attach the display to the bezel. Remove the display.
3. Un-solder the flexi cable from the key switch. Remove the spring clip from the switch then withdraw the
switch from the case.
4. Undo and remove the four nuts and washers which attach the Switch Panel to the bezel. Lift the Switch
Panel away.
5. Replace all items by reversing this procedure.
Bezel
Display
and cable
Displayfixing screws
and washers
(
4off
)
Switch
Panel
SwitchPanel
fixing nuts and
washers(4 off)
Spring
clip
Key
switch
Switch
cable
Figure 14.2: Removing the Switch Panel Assembly
14.4 Processor Board
1. Remove the Front Panel Assembly as explained in Section 14.1
2. Pull the Processor Board forwards so that it disengages from the connector at the back of the case.
Withdraw the board from the case.
3. Replace all items by reversing this procedure. Take great care to ensure that the cables are not pinched on
re-assembly.
SwitchPanel
andBezel
Display
cable
PL1 PL2
Switch panel
cable
Power Supply
B
o
a
r
d
Processor
Board
Mother
Board
Figure 14.3: Removing the Processor Board and Power Supply Board