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Revision C 250cx Series Maternal/Fetal Monitor 6-27

2036947-001

Parts List, Drawings, and Replacement: Assembly/Disassembly of FRUs

27. Connect 10-conductor UI Keypad-to-Volume ribbon cable to Volume board

connector.

28. Tilt the front bezel back onto chassis. Refasten screws to each side of chassis.

29. Connect 10-conductor DSP-to-Keypad ribbon cable to DSP board connector J5.

30. Connect 20-conductor DSP-to-LCD Decoder ribbon cable to DSP board

connector J2.

31. Connect 8-conductor Inverter cable to DSP board connector J1.

32. Place DSP board onto Main board. Use two screws to fasten DSP board to

chassis.

33. Connect external display cable from J9 on the DSP/Display PWA.

2025177-026 Trim Knob and Encoder

1. Remove top cover. Keep screws aside.

2. Remove two screws fastening DSP board to chassis.

3. Remove DSP board from Main board.

4. Disconnect 8-conductor Inverter cable from DSP board connector J1.

5. Disconnect 20-conductor DSP-to-LCD Decoder ribbon cable from DSP board

connector J2.

6. Disconnect 10-conductor DSP-to-Keypad ribbon cable from DSP board

connector J5.

7. Disconnect external display cable from J9 on DSP/Display PWA.

8. Tilt the front bezel forward, away from the chassis.

9. Disconnect 10-conductor Keypad-to-Volume ribbon cable from Volume board

connector.

10. Disconnect Encoder cable from Keypad board.

11. Remove Trim Knob, Encoder washer and Encoder.

12. Insert new Encoder, Encoder washer, and Trim Knob.

13. Connect Encoder cable to Keypad board.

14. Fasten Keypad bracket to front bezel with two screws.

15. Insert new Volume board and side keyboard pad into front bezel.

16. Fasten Volume board and side keyboard pad to front bezel with four screws.

17. Fasten bracket to Display assembly with screw.

18. Fasten bracket to front bezel with screw.

19. Connect 10-conductor Keypad-to-Volume ribbon cable to Volume board

connector.

20. Tilt the front bezel back onto chassis. Refasten screws to each side of chassis.

21. Connect 10-conductor DSP-to-Keypad ribbon cable to DSP board connector J5.

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