Removing The Circuit Board Assembly - GE DigitalFlo XGM868i Service Manual

Chapter 4. Parts Replacement

4.2 Removing the Circuit Board Assembly

All parts replacement procedures for the Model XGM868i require the removal of the circuit board assembly from the
electronics enclosure. Therefore, complete the instructions in this section before attempting any other service tasks.
The Model XGM868i circuit board assembly consists of circular front and rear circuit boards with several rectangular
circuit boards sandwiched between the circular end boards and oriented perpendicular to them. Specifically, some or all
of the following circuit boards may be included in the assembly:
FRONT BOARDS:
•
LCD Display/Interconnect Board Subassembly
REAR BOARD:
•
Terminal Board
MIDDLE BOARDS:
•
Main Board
•
Receiver Board
•
Power Supply Board
•
Slot 1 Input/Output Card (optional)
•
Slot 2 Logging/RS485 Card (optional)
To disassemble the circuit board assembly, refer to Figure 6 on page 33 and complete the following steps:
1. Disconnect the power to the XGM868i and move the electronics enclosure to a safe area.
Note: If the electronics enclosure cannot be moved to a safe area, be sure the surrounding area is free of ignitable
gases before proceeding to step 2.
WARNING! The main power to the Model XGM868i must be disconnected before proceeding.
2. Refer to Illustration 1 in Figure 6 on page 33. Loosen the set screw on the rear cover. Place a rod or long
screwdriver across the cover in the slots provided, and rotate the cover counterclockwise until it comes free from
the enclosure.
3. Repeat Step 2 to remove the front cover.
24 DigitalFlow™ XGM868i Service Manual