Transcript
Streak shower NO 北 Analog bus dependent? YES Defective detector or FPA/ADC Acquire data in DCA/DAS TEST mode 司 公 限 cn 有 m. 展 co 发 a. 54 术 ti 4/ 技 en /4 捷 ig 34 安 il 40 勤 .d 00 天 ww -65 w 0 京 Isolate the error channel by DCA and sinogram Channel dependent? NO Data error present? NO YES YES 01 Four consecutive error channels? Reference channel (Channel R)? NO NO Move the faulty INTEG PWB to another position. Fanbeam-like streak? YES Defective cables connecting units YES (SS/ADI2, KGTS, GCIF2, OPCONT2) or their connectors NO Bit dependent? NO Defective YES Defective TIMING I/O PWB or I/O cable or OPCONT2 PWB YES YES Channels moving? Defective INTEG PWB Defective main detector NO OK Check the offset data with the gantry stopped. Exchange the INTEG PWB in the first slot with a PWB in another slot and perform check. DAS supply voltage OK? Offset data abnormal? YES NG Adjust supply voltages. Check the I/O and GND cables. NO Defective main detector Defective FPA/ADC PWB or TIMING I/O PWB Did the YES defective channel move? NO Defective REF detector (or its output cable) Defective INTEG PWB in slot 1 Figure 2.5-2 Streak shower troubleshooting flow No. 2D201-103EN*E 111 OPCONT2 or SS/ADI2
