Instruction manual

Instruction Manual
760006-A
September 2001
7-2 Maintenance and Service Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA 2000 Platform
4. If the current fuses have blown, replace
them with ones of the same type and
value (see Section 9 Replacement
Parts). Note that both fuses are required
for protection, and both should be re-
placed.
5. If the operator, during initial installation, is
switching to 230 VAC, and the Platform
module is an earlier unit with individual
fuses for the two voltage ratings, use the
appropriate fuses and fuse holders found
in the shipping kit. Note that two fuses are
required for protection, and both should
be replaced. If the fuses are already
marked as 230V AC, they do not need to
be replaced.
6. Secure the fuse holder door.
7-3 CONTROLLER BOARD REPLACEMENT
To replace the Controller Board, refer to
Figure 1-10 and do the following:
1. Remove the six screws securing the Front
Panel, and swing it completely open into
the locked position. (Dual Platforms have
no hinge - simply remove the appropriate
side's front panel.)
WARNING.
HAND INJURY HAZARD
Do not place hands or fingers in
Platform front handles when the
Front Panel is open. Dropping Front
Panel while hand or fingers are in-
side either handle can cause serious
injury.
2. Disconnect the display ribbon cable from
the controller board by unhooking the
black hold down clips on top and bottom
of the connector. Pushing the clip back
will aid in extracting the connector.
3. Remove the board by pushing down on
the PCB Extractor (the red lever at the
bottom of the board)
Replace by reversing Steps 1 and 3.
NOTE
The battery on the Controller board
is a Lithium type. The battery is a
permanently attached component
and should only be replaced by
qualified service personnel. If re-
placed, use appropriate hazardous
material disposal procedures.
7-4 POWER INPUT MODULE REPLACEMENT
To replace the Power Input Module, do the
following:
1 Remove power cable from its socket on the
Power Input Module.
2 Remove the four securing screws near the
corners of the Power Input Module face
plate.
3 Using the extraction handle, gently pull the
Power Input Module from the Platform.
4 Replace the unit by reversing steps 1
through 3, ensuring that Backplane con-
nections are seated properly.
7-5 POWER SUPPLY REPLACEMENT
To replace the Power Supply, do the follow-
ing:
1 Remove power cable from its socket on the
Power Input Module.
2 Loosen the six securing screws on the front
panel of the Platform module.
3 Locate the Power Supply on the extreme
right of the Backplane inside the front of the
Platform module. It is a black metal box
mounted on a circuit card.
4 Press down on the red tab and gently pull
the Power Supply from the Platform.