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Instruction Manual
748297-E
June 2003
4-14 Maintenance and Troubleshooting Rosemount Analytical Inc. A Division of Emerson Process Management
Model NGA2000 HFID
Figure 4-12. Electronics Assembly – Exploded View
Printed Circuit Boards
When replacing a circuit board, the follow-
ing procedure is recommended:
1. Per Section 4-2e on page 4-13, re-
move securing hardware from elec-
tronics assembly and lay on bench.
2. Remove securing hardware from
printed circuit board to be replaced,
do not disconnect cable(s).
3. 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