Panasonic CT-27D10B Service Manual

Also see for CT27D10DB - 27" COLOR TV: User guide

Panasonic CT-27D10B Service Manual Manual pdf 9 page image

- 9 -Disassembly for ServiceBack CoverRemove all the screws marked with an arrow( )from the back of the Receiver.Note: Screw configuration, type, and number ofscrews vary depending on the model of theReceiver serviced and the application; variousmodels are covered in this Manual. Use samehardware when reassembling the receiver.• 3 screws at the top edge of the Receiver.• 1 screw at each lower corner of the Receiver.• 1 screw by the AC cord assembly.• 1 screw by the A/V jacks.• 1 screw by the Fly-back assembly.A-Board - Main Chassis1. Slide the chassis completely out of the guide rails.2. Stand the Receiver on its edge. The underside ofthe board is completely accessible for componentreplacement.Note: Some tie-wraps that secure the wire dressingsmay need to be unfastened for chassisremoval.C-Board - CRT OutputPlugs into the socket on the CRT neck.SpeakersSpeaker is secured to the cabinet’s front with 4screws.Keyboard Push Button AssemblyFastened to the inside of the cabinet front with upto 3 screws.Disassembly for CRT Replacement1. Discharge the CRT as instructed in the SafetyPrecautions (see page 2).2. Disconnect the yoke (DY) plug, degaussing coil(DEG) plug and the CRT 2nd anode button fromthe main board.3. Remove the C-Board from the CRT base andunplug the black wire (CRT dag ground) C10.4. Disconnect the A11, A12, and Speakers plugs fromthe A-Board.5. Lift the Main Chassis (A-Board) and all mountedboards completely out with the CRT Board attached.CRT Replacement1. Perform Disassembly for CRT Replacementprocedure.2. Insure that the CRT H.V. Anode button isdischarged before handling the CRT. Read theSafety Precautions (see page 2) on handling thepicture tube.3. Remove the components from the CRT neck andplace the cabinet face down on a soft pad.4. Note the original order for the CRT mountinghardware as they are remove from the CRTmounting brackets at each corner of the CRT.5. Remove the CRT with the degaussing coil and thedag ground braid attached.6. Note the original locations and mounting of thedegaussing coil and the dag ground assembly toinsure proper reinstallation on the replacementCRT.To remove and re-mount the degaussing coil:The degaussing coil is held in place by clampersfastened to the CRT corner ears. These clampersmust be installed onto the replacement CRT priorto mounting the degaussing coil.To remove and re-mount the dag ground braid:a.Unhook the coil spring from the bottom cornersof the CRT ears.b.Release the braid loop from the upper corners ofthe CRT ears.7. Mount the dag ground braid on the replacementCRT. Position the degaussing coil with new ties.Dress coil as was on the original CRT.8. Replace the components on CRT neck andreinstall into cabinet. Verify that all ground wiresand circuit board plugs get connected.