PHILIPS DPTV-305 DPTV-310 60PP9202 PICTURE TUBE REPLACEMENT
CRT Replacement: Disassembly Procedures
Upon completion of CRT | Optical assembly repair, the centering, convergence, gray scale, mechanical & electrical focus adjustments are required. If more than one assembly requires repair it should complete one assembly at a a time, using the existing assemblies as reference for the alignment of the centering and convergence. Procedures
Upon completion of CRT | Optical assembly repair, the centering, convergence, gray scale, mechanical & electrical focus adjustments are required. If more than one assembly requires repair it should complete one assembly at a a time, using the existing assemblies as reference for the alignment of the centering and convergence. Procedures
- Remove AC power.
- Remove the upper and lower back covers.
- Remove the barrier board and the shield cover from around the lens assemblies.
- Remove CRT socket board from the CRT of the CRT | Optical assembly being serviced.
- Remove the yoke and convergence plugs, of the CRT | Optical assembly being serviced, from the Large Signal Module.
- Remove the high-voltage anode lead from HV splitter block on the Large Signal Module of the CRT | Optical assembly being serviced. Remove Ground lug connectors from the coupler frame.
- Remove the 4 1/4" screws that secure the CRT | Lens assembly to light rack. These four screws are located in each corner, on the top of the coupler assembly. DO NOT the bolts with pressure springs or the inverted torx screws of the CRT | Lens assembly. The removal of these components could result in fluid spillage into the PVC cabinet.
- Carefully remove the CRT | Lens assembly from the PTV cabinet.
REMOVING THE PTV COUPLING FLUID.
Coupling fluid is poisonous solution containing high concentration of
ethylene glycol. Prevent children or pets from coming into contact
with fluid
- Lay the CRT assembly on its side with the plug pointing up.
- Remove Plug {8X}.
- 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 is 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 the bottle, allowing the fluid to be pulled up into the bottle. Save the fluid.
- Re-install the plug {8X}
- Stand the CRT assembly up with the neck of the CRT pointing up.
- With ad owl or marking pen, outline the edges of the CRT into the coupler.
- Remove the 4 CRT mounting bolts.
- Remove the 4 CRT mounting ear screws.
- Remove any metal shavings from around the screw holes.
- Note the position of the Hi-Voltage anode cap with respect to the coupler.
- Remove the CRT from the coupler, wipe any excessive fluid from the face plate of the CRT. Set the CRT aside.
- Use an empty coupling fluid bottle to extract the reminder of the fluid from the coupler.
- Clean any remaining fluid from the coupler and CRT gasket channel using absorbent tissue
- Make all necessary repairs.
REPLACEMENT OF CRT
- Remove CRT coupling fluid as described above.
- Remove the plastic protective coating , if present, from the face plate of the replacement CRT.
