Panasonic CT-25G6E Service Manual

Also see for CT27G6DE - 27" COLOR TV: Operating instructions Service manual

Panasonic CT-25G6E 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; various models are coveredin this Manual. Reuse hardware whenreassembling 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 Flyback 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 OutputThe board plugs onto the socket on the CRT neck.To release the Focus wire, use a dull object torelease the tab on the socket (near the wireopening) and carefully pull on the wire. To connectthe Focus wire, press on the tab to lock it theninsert the wire in the opening and press on it until itis fully inserted and locked in place.SpeakersEach speaker is secured to the cabinet’s front with2 screws.Keyboard Push Button AssemblyFastened with screws to the inside of the cabinetfront.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 from the main board.3. Unplug the CRT 2nd anode button from the mainboard.4. Remove the C-Board from the CRT base andunplug the black wire (CRT dag ground) C10.5. Disconnect the A11, A12, and Speakers plugs fromthe A-Board.6. 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: Thedegaussing 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 cornersof the 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.