2.4; Aec Board (5-Field Ion Chambers) - CPI CMP 200 Series Service Manual

CPI Canada Inc.
3D.2.4 AEC Board (5-Field Ion Chambers)
The AEC board shown below is designed for use with various three-of-five-field ion chambers as per AEC
compatibility matrix SUP73938900.
This board is fitted with 15 pin D connectors J1 and J2.
Figure 3D-4: Three-of-five-field ion chamber AEC board (assembly 739389)
AEC board input assignment:
• Ch 1 = J1.
• Ch 2 = J2.
The following potentiometers are used for AEC gain adjustment:
•
R11 is used for channel 1 gain adjustment.
•
R12 is used for channel 2 gain adjustment.
Use and disclosure is subject to the restrictions on the title page of this CPI document.
®
CMP 200 Service Manual
J1
Ch # 901476-05 Rev. A
AEC Calibration
J2
3D
Page 3D-9