Madrigal Imaging MP-8, MP-9, Instruction Manual

Page: 5 / 8

MP8 CRT Installation
Page 3
Procedure
TO BE PERFORMED BY QUALIFIED SERVICE PERSONNEL ONLY!
Unpacking New
CRT Assembly
1. Carefully unpack the CRT Service Assembly and inspect for shipping damage.
2. Compare the defective component with the replacement part to ensure the correct
part was ordered. Carefully check the following.
•
Check the label of the CRT to make sure the color of the phosphor is correct.
• If your projector has an electronic Stigmator control, check that the focus coil
has two sets of connectors (one for the Focus Module and the other for the
Stigmator Amplifier Module).
Removing the
CRT Assembly
1. Remove all necessary covers and panels on the projector (Front and Rear Top
Covers, Rear panel, Upper Left and Right Side panels, Left and Right Side Shield
panels).
2. Remove the enclosure (rear cover) from the Video Neck Board (VNB) and
disconnect all electrical connections to the VNB. NOTE ALL CONNECTOR
LOCATIONS AND IDENTIFY MATCHING CONNECTIONS in preparation for re-
assembly once the CRT has been replaced.
3. Disconnect all remaining electrical connections to the CRT assembly again noting
connector locations, lead dressing and identifying matching connections. (If
removing the Green CRT, unscrew the High Voltage Splitter box and save the
screws).
4. Remove the top plate by removing the four long Hex headed bolts, six allen bolts
and other supporting parts. This will free up the CRT assembly for removal. (AT
THIS POINT, ALL THREE CRTs ARE FREE). It is recommended that you perform
this service while projector is off the ceiling and upright. See Diagram 1 for Top
Plate bolt locations. These bolts are labeled A – B – C – D in the diagram.
Diagram 1 – CRT Securing Bolt Locations