LORAD AFFINITY Series, Service Manual

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P/N 9-500-0255 1-3
Service Manual
Chapter 1: General Information
Safety
Emergency OFF switches are provided in compliance with IEC 601-2-32. Each of these
switches
disables power to the entire system.
WARNING! LETHAL voltages are present within the interior of the unit.
Use extreme caution to avoid contacting, directly or indirectly
(through tools), any connector pins, terminals, or test points.
Remove all jewelry before working on the unit, and avoid
wearing loose fitting clothing.
Warnings:
Only qualified electronic technicians who are certified and experi-
enced in the maintenance and repair of high voltage x-ray equipment
should attempt to service this equipment.
Never perform service alone. Only service this equipment in the com-
pany of someone who is capable of rendering aid should an accident
occur.
2.2 Interlocks
In addition to the Emergency OFF switches, the Affinity Series contains several safety
interlocks. These interlocks are as follows:
• C-arm Movement Interlock - When the C-arm encounters an obstruction during
travel, this interlock engages to immediately stop vertical travel and disable all C-
arm vertical movements (except C-arm UP) until the obstruction is cleared. C-arm
movement is also prohibited when compression force exceeds 50 N (12 lb).
• Automatic Compression Release Interlock - Installing a Localization Paddle disables
the compression release function, including automatic compression release (if
enabled).
• Early Release Interlock - When the x-ray exposure switch is released prior to the end
of the exposure, this interlock causes immediate termination of the exposure.
• Cassette Sense Interlock - When the system does not detect a cassette in the Bucky,
or if the cassette is not ejected after an exposure, this interlock prevents x-ray expo-
sure.
• Aperture Interlock - This function detects the aperture and image receptor that is
installed and prevents x-ray exposure if an incompatible aperture/image receptor
combination is detected.
• Mirror/Filter Interlock - This interlock prevents x-ray exposure when the Light Field
Mirror and/or the Filter is not positioned correctly.
• Relay Interlock - This interlock prevents x-ray exposure when there is a failure of the
Power ON indicator or the X-ray Exposure indicator.
2.3 Mechanical Safety
The equipment is designed to comply with the requirements of IEC 601-1, UL 2601, and
IEC 601-2-32, in that the following conditions exist:
• The C-arm rotation brake remains locked upon loss of electrical power (fail safe).