Tektronix RTX100A Service Manual page 104

Removal and Installation Procedures
A20 PCI Backplane Board
5-24
3. Remove the CPU board: See Figure 5-10 on page 5-22.
a. Disconnect these cables:
H The cable from the hard disk drive at CN1.
H The cable from the Printer connector at CN3.
H The cable from the A50 Disk I/F Board at CN4.
H The cable from the A20 PCI Backplane board at CN5, CN6, CN9,
and CN14.
H The cable from the A35 Power Switch board at CN7.
b. Use a screwdriver with a T-10 Torx tip to remove the two screws
securing the board bracket to the chassis. See Figure 5-10 on page 5-22.
c. Grasp the board and slide it out.
4. Reinstallation: Do step 3 in reverse order to reinstall the CPU board.
NOTE. After you replace the CPU board, you must set the BIOS configuration.
Refer to Setting BIOS Configuration on page 5-35.
1. Assemble equipment and locate module to be removed:
a. You need a screwdriver with a T-10 Torx tip.
b. Locate the A20 PCI Backplane board in the locator diagram Board
modules, Figure 5-3, on page 5-12.
2. Orient the instrument: Set the RTX100A so its bottom is down on the work
surface and its right side is facing you.
3. Remove the A20 PCI Backplane board: See Figure 5-10 on page 5-22.
a. Remove the interface module as described on page 5-23 (if needed).
b. Remove the A12 Main board as described on page 5-23.
c. Remove the CPU board as described on page 5-23.
d. Disconnect these cables:
H The cable from the A40 AC Distributer board at J220.
H The cable from the 12 V main power supply at J160 and J170.
H The cable from the external fan at J190.
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