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Instruction Manual
760004-A
February 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Maintenance and Service 4-15
Model NGA 2000 HFID
Figure 4-12. Electronics Assembly – Exploded View
a. Printed Circuit Boards
When replacing a circuit board, the fol-
lowing procedure is recommended:
Per Section 4-6, remove securing hard-
ware from electronics assembly and lay
on bench.
Remove securing hardware from printed
circuit board to be replaced, do not dis-
connect cable(s).
One at a time, remove the wiring con-
nectors and attach to replacement board.
Mount replacement board to electronics
assembly.
Safety Board
657499
Sensor Board
657060
Computer Analysis Board
659149
Preamp Assembly
656945
Case Pressure Purge
Switch 903690
Power Supply Board
655764
Case Temperature Sensor
656026