Replacing The Crystal - Philips CARDIOMD Service Manual

Detector Repairs
Procedure
the LED aperture should be changed.
Note. To change the LED aperture, turn the
slot on the back of the PMT. The slot can be
accessed with a screwdriver through a hole in
the PMT strip board.
18. Remount the rest of the detector and run a
complete PMT update calibration.
19. Run a QC check to determine if further
calibrations are required. See the
CardioMD Operator's Manual Chapter 5
Maintenance for instructions.
6.3.6

Replacing the Crystal

Procedure
1. Disassemble the detector and remove all
24 PMT's. Follow instructions provided in
the previous sections.
2. Unscrew the mu-metal support plates
mounted on the two short edges of the
detector.
3. Lift out the mu-metal support plates.
4. Disconnect the internal HV cable from the
mu-metal assembly.
5. Loosen the two set screws in the support
brackets in each side.
To remove the brackets:
6. Unscrew the 3 screws going through the
detector casting from the outside and the 3
screws going through the detector casting
from the power supply compartment.
7. Disconnect the internal HV cable from the
crystal and lift up the crystal.
8. Remove the gasket – or remainders of the
gasket – from the crystal seating inside
detector casting.
6-10 CardioMD Service Manual
Details
Details
mu-metal plate
1MAN0158-H11 04-2005 CSIP Level 1