M2540-92000-01 A M2540 Ultrasound System Field Service Manual Page 151
Service Procedures: E-box
E-box
You can perform most e-box service without removing the e-box from the system. To perform
service that does require removing the e-box, you must also remove the power supply (See
“Removing the Power Supply and the E-box” on page154).
➤Replacing E-box Circuit Boards
CAUTION Always observe proper ESD procedures when servicing the inside of the e-box. Wear a
grounded wrist band, and work on a static-dissipating mat if possible. See “ESD Safeguards” on
page 139.
To replace a circuit board in the e-box, see Figure 13-2 on page 183 to locate parts and
assemblies, and complete the following procedure:
1. Disconnect the system power cord from the main AC supply.
2. Open the door at the right rear of the lower enclosure by turning its latch
counter-clockwise.
3. Disconnect the token ring cable from the rear of the e-box.
CAUTION The token ring cable connectors are easily damaged. Be gentle when connecting and
disconnecting the cable.
4. Lift the handles of the two latches on the e-box rear cover, and rotate them a quarter turn.
Remove the cover.
5. If the faulty board is the BPAP board, disconnect the two cables from its face before
removing it.
6. Remove the faulty board.