Thermo AC-4000, Руководство по эксплуатации и обслуживанию

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REC 3838 4-4
4.3.3 Communications Board Replacement
To replace the Communications Board, proceed as indicated below.
1. Turn off power at mains.
2. Open electronics controller enclosure door.
3. Locate the Communications Board (directly above the CPU Board) near the
upper, back portion of the enclosure. See Figure 4-2.
4. Gently pull the Communications card handle, extracting the board from the
pin connectors.
5. Place new Communications Board in enclosure. Insure the board is in the
upper slot, properly oriented and fully seated.
6. Set dip switches on new communications board as they were positioned on
old board.
7. Verify all setups. Refer to Chapter 3 for all setup procedures.
4.3.4 CPU Board Replacement
To replace the CPU Board, proceed as indicated below.
NOTE: If your electronics system is operating erratically, try to capture as much
setup data as possible before turning off power.
1. Turn off power at mains.
2. Open electronics controller enclosure door.
3. Locate the CPU Board (directly below the COMM Board) near the upper, back
portion of the enclosure. See Figure 4-2.
4. Remove hardware securing CPU board. Gently pull the CPU card handle,
extracting the board from the pin connectors.
5. Place new CPU Board in enclosure. Insure the board is in the lower slot,
properly oriented and fully seated.
6. Perform a Cold Start Procedure.
7. Verify all setups. Refer to Chapter 3 for all setup procedures.
4.3.5 Analog Board Replacement
To replace the Analog Board, proceed as indicated below.
1. Turn off power at mains.
2. Open electronic controller enclosure door.
3. Disconnect Analog Board cables J3, J4, J5, J6, J9, J10, J11, J26, and J27.
See Figure 4-2.
4. Unscrew loadcell cables at TB3A and TB3B. Also unscrew all wires on TB4.
5. Remove screw and washer securing Analog Board to enclosure.
6. Remove Analog Board from enclosure.
7. Verify DIP Switch SW1-1 through SW1-8 settings on new Analog Board with
old board.