Discovery QDR Series Technical Manual
5-4
13. Restore the cable shield and ground strap terminations.
14. Restore power, boot the computer and login as Service.
15. Perform the procedure in “MOTOR$AY” on page 3-35.
5.2.3 C-Arm Y Encoder
To remove and replace the Encoder, refer to Figure 5-1 and follow the procedure below:
1. Before removing power from the Discovery, remove both cable covers, unhook
the center cable hold-down clip and free the encoder cable without unplugging it.
2. Move the C-arm towards the center of the Scanner (so the encoder is accessible).
3. Shut down the computer and then turn off the main circuit breaker on the foot end
pedestal.
4. Unplug the encoder from the Motor Controller Board and pull out the cable.
5. Remove the coupling hardware holding the encoder to the belt drive.
6. Remove the encoder from the bracket assembly.
7. Replace the encoder on the bracket, install the coupling but do not tighten the
screws.
8. Restore power, boot the computer and login as Service.
9. Perform the procedure in “MOTOR$AY” on page 3-35.
Note: When starting this procedure, make sure the encoder coupling setscrew is
not tightened.
5.3 Table Y FRUs (A, W and Wi Only)
This section describes how to remove and replace the FRUs associated with the Table Y
motion of the Discovery (see Figure 5-2).
1. Before removing power from the Discovery, move the table to the far left using
the Motor Control Pad. The Motor Control Pad can be accessed from the Discov-
ery Main Menu screen by choosing
Utilities|Emergency Motion.
2. Shut down the computer and then turn off the main circuit breaker on the foot end
pedestal.
3. Remove 2 screws from the right table rail end cover, and slide the cover off from
the end.
Summary of Contents for DISCOVERY A
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Page 56: ...Discovery QDR Series Technical Manual 3 4 Figure 3 3 System Dimensions for Discovery SL...
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