6-14 P/N 9-500-0255
Service Manual
Chapter 6: Maintenance—Remove and Replace Procedures
Gantry Components—Remove and Replace
Affinity Serial Numbers 0019 and Above
Remove and replace the HV Generator Assembly as follows (refer to Figure 6-8):
1. Remove power to unit and access the HV Generator Assembly by removing the left side
Gantry cover as per Section 2.1.1.
2. On top of the HV Multiplier, disconnect the high voltage cable from the receptacle.
3. On the HV Inverter board, disconnect GJ1. Wait approximately 5 minutes before pro-
ceeding (see WARNING below).
WARNING! To reduce the risk of hazardous electrical shock, do not
attempt service until the LEDs D2 (Inverter Rail) and D35
(Brake Rail) on the HV Inverter Board are extinguished and an
additional 1 minute has elapsed.
4. On the HV Inverter board, disconnect GJ3 and GJ5. Remove any installed cable ties.
5. On the HV Control Filament board, disconnect MJ4, MJ5, MJ6, MJ7 and MJ8.
6. Loosen the uppermost mounting screws securing the HV Generator Assembly mounting
plate to the Gantry.
7. While maintaining a secure hold on the HV Generator Assembly, remove the remaining
screws securing the assembly to the Gantry frame. Slide the assembly up and out of the
Gantry.
8. Reverse these procedures to replace the HV Generator Assembly.
9. Perform the following procedures before returning unit to service:
• Chapter 4, Section 4.1, Tube Voltage Calibration
• Chapter 4, Section 4.3, Filament Current (mA) Calibration
• Chapter 4, Section 9.1,kV Control Offset Calibration, p. 59
To Next Page
Loading...