Manualshelf

Service manual

ManualsBrandsCompaq ManualsComputer equipmentAlphaServer 160
321322323324325326327328329330
GS160/320 Component Removal and Replacement 4-39
Removal (Requires two people
)
1. If the system is not partitioned, shut down the operating system and remove AC by
powering off the system and tripping the main circuit breakers on the AC input
boxes. Skip step 2.
2. If the system is partitioned, shut down instances of the operating system in the
target QBBs in the system box. Remove all AC power by tripping the circuit
breakers on the AC input box that controls the system box to be removed. See
Section 4.4.1 for color-code information.
3. Place an ESD mat, two of which are included with the system box spare, on two
horizontal surfaces, one in front of the machine and one in back.
4. Remove all the modules from both the front and rear QBBs. See Sections 4.5.1
through 4.5.6. Place the modules on the ESD mats.
5. Move the cables (global port and clock) out of the system box. Pay close attention to
clock cable routing since you will want to put the cables back the same way.
6. Disconnect the power cable from the backplane in the system box. Move the cable
out of the box to the rear of the system.
7. Disconnect the ground cable connected to the backplane stiffener and move it out of
the way.
8. Disconnect the power cable from the rear of the system box.
9. Disconnect the signal cables from the front of the system box.
10. At the front of the system, loosen the three Phillips head screws holding the upper
system box locking bracket. Slide the bracket up and tighten the middle screw to
hold it up.
11. Loosen the three Phillips head screws holding the lower system box locking bracket
and the system box to the frame and slide it down.
12. Slide the system box from the front of the system cabinet.
Replacement
Reverse the steps outlined in the removal procedure. Do not put the modules into the
new system box and then try to put the full box back into the system cabinet. Once the
new system box is in place, transfer the modules from the ESD mats to the new system
box.
Verification
Power up the system/QBBs and check that the SCM maps in the QBBs in the target
system box. Execute the SRM set sys_serial_num command.