PHILIPS MAGNAVOX - 51 MP6100 _ 51 PP9100 _ 60 PP9100 - REAR PROJECTION TV
REMOVAL OF A SINGLE CRT/LENS ASSEMBLY FROM THE LIGHT RACK
- Remove AC power from PTV.
- Remove upper and lower back covers. [1/4"] screws.
- Remove the barrier board and the shield cover from around the lens assemblies.
- Carefully remove CRT socket board for CRT of the CRT/optical assembly being services.
- Remove yoke and convergence plus, of the CRT/Optical assembly being serviced, from large signal module.
- Remove the high-voltage anode lead from the HV splitter block on the large signal module of the CRT/optical assembly being serviced. Remove ground leg connectors from the coupler frame.
- Remove the 4 (1/4") screws that secure the the CRT/lens assembly to the right rack. These four screws are located in each corner on the top of the coupler assembly. (Do not remote the bolts with pressure springs or inverted Torx screws of the CRT/lens assembly. The removal of these components could result in fluid spillage into the PTV cabinet.
- Carefully remove the CRT/lens assembly from the PTV cabinet.
SERVICING THE CRT/LENS ASSEMBLY
All repairs made to CRT/optical block assembly require the removal of the coupling fluid.
How to remove the PTV Coupling Fluid
- Lay the CRT assembly on its side with the plug pointing up.
- remove the plug [X8].
- Remove some of the fluid from the coupler to prevent spillage when the CRT is removed. An empty coupling fluid bottle with a cone top recommended to lower the fluid level within the coupler. Squeeze and hold the bottle and insert the tip of the cap into the drain hole of the coupler. Loosen the grip on bottle, allowing the fluid to be pulled up into the bottle. Save the fluid.
- Reinstall the plug [X8].
- Stand the CRT assembly up with the neck of the CRT pointing up.
- With an awl or marking pen, outline the edges of CRT onto the coupler. (The correct positioning of CRT to the coupler is critical to optimum performance of the optical system.
- Remove the four CRT mounting bolts, with springs and spacers, and remove the mounting bracket.
- Remove the four CRT mounting ear screws. [The mount ear screws are not use in some assemblies.]
- Gently remove any metal shavings from around the screw holes. Do not allow the metal shavings to get into the fluid. Note the position of the high voltage anode cap with respect to the coupler.
- Carefully remove the CRT from the coupler. Wipe any excess fluid from the face plate of CRT. Set CRT aside.
- Use an empty coupling fluid bottle to extract the reminder of the fluid from the coupler. Complete removal of the coupling fluid is not necessary when only replacing the CRT.
- Clean any remaining fluid from the coupler and CRT gasket channel using absorbant tissue.
- Make all necessary repairs.
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