Motus M990T, Service Manual

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3.10 How to Replace the CHR (Contact Heart Rate) Board or Combo Board
3.10.1 Old Version CHR Board
Note: Old version CHR Board is mounted on MPU Board as Piggy Back Board.
Do the steps below while referring to the following Exploded Views in Appendix and Section
4
ELECTRONIC PCB, CONNECTOR AND CABLE OVERVIEW.
D.1 OVERLAY BEZEL ASSEMBLY
E.1 CONSOLE ASSEMBLY
1) Turn off the unit power at the switch and then unplug the line cord at wall outlet.
2) Remove eleven screws (B23) from the Console Bottom (C2).
3) Lift off the Console Bottom from the Console Case (C1) while disconnecting the Download
Cable (C41) from the MPU PCB (L9 or D4).
4) From the underside of the Console Case (C1), remove three screws (B26) securing the
Overlay Bezel Assembly (LCD TYPE/DOT TYPE) to the Console Case.
5) Remove green Earth Cables (J3) connected between MPU PCB (L9 or D4) and Handle
Frame (C3) by removing two screws (B21) from Handle Frame.
6) Disconnect all of electrical connectors from MPU PCB (L9 or D4).
If the Model is M990TL or M995TL with LCD Screen, disconnect the Co-axial Cable(TU1),
Stereo Cable (CN12), RCA Cable(CN5, 8, 9), S-VIDEO Cable(CN2) and DC12V Cable(CN3)
from the A/D Board (L13).
7) Lift out the Overlay Bezel Assembly (LCDTYPE/DOT TYPE) from the front of Console Case
(C1) and then put it down on the flat and clean surface so that the Display faces downward.
8) Cut Cable Tie Strap securing CHR Board to MPU Board and remove the Cable Tie Strap.
9) Lift off the CHR Board from the MPU Board (L9 or D4).
10) Install new CHR Board(old-version) in reverse order.