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Work on the receiver should not be attempted by anyone who is not thoroughly familiar with the precautions necessary when working on high voltage equipment. Do not install, remove or handle the picture tubes in any manner unless shatterproof goggles are worn. People not so equipped should be kept away while the picture tube is being handled. Keep the picture tube away from the body while handling. When service is required, observe the original lead dress. Extra precaution should be taken to assure correct lead dress in the high voltage area.
Where a short-circuit has occurred, replace those components that indicate evidence of overheating. It is recommended that a lead apron be used for shielding while handling the CRT. Use this method if possible. When replacing the CRTs, use only the designated replacement part since it is a critical component with regard to X-Radiation. High voltage must be set as prescribed under the section titled Electrical Adjustments.
Leakage current check Before returning the receiver to the customer, it is recommended that leakage current be measured according to the following methods. Connect one lead of an ohm meter to the AC plug and touch the other lead to each exposed metal part i.
The resistance of the exposed metal parts having a return path to the chassis should be a minimum of 1Mega Ohm. Any resistance below this value indicates an abnormal condition and requires corrective action. Hot Check Use the circuit shown below to perform the hot check test. Keep switch S1 open and connect the receiver to the measuring circuit.
Immediately after connection, and with the switching devices of the receiver in their operating positions, measure the leakage current for both positions of switch S2. Close switch S1, energizing the receiver. Immediately after closing switch S1, and with the switching devices of the receiver in their operating positions, measure the leakage current for both positions of switch S2.
Repeat the current measurements of items 1 and 2 after the receiver has reached thermal stabilization. The leakage current must not exceed 0. Front Cabinet Disassembly 1. Remove the Speaker Grille by pulling forward. Remove the Board Front by removing screws a. Remove the screws b holding the Screen Assembly.
Lift the Screen Assembly up and away from the cabinet. Rear Cabinet Disassembly 1. Remove the Back Board by removing screws a and b.
Remove 4 screws c securing the Board Slide. Remove 4 screws d holding each Board Shelf. Be certain that all cables and connectors between the Light Box Assembly and external items are disconnected e. Remove 3 screws c and screw f. Then slide the Light Box Assembly from the cabinet. Remove the Board Front by removing 4 screws a. Remove the 4 screws b holding the Screen Assembly. Remove the Board Front by removing screws b 3. Remove the Control Panel by removing two screws a.
Remove the four screws c holding the Screen Assembly. Remove the Speaker Grilles and Unit Front by pulling forward. Remove 2 screws a to remove the Control Panel. Remove the Board Front by removing 4 screws b. Remove the 4 screws c holding the Screen Assembly. Remove screws a holding the Back Board.
Remove 4 screws a holding the Board Slide 3. Remove the 4 screws b holding each Board Shelf. Remove screw e and 3 screws c securing the Light Box Assembly. Slide the Light Box out the rear of the Cabinet. Remove 2 screws a securing the Front Panel. Remove 6 screws b to remove the Board Front. Unplug the LF connector. Remove the 4 screws c securing the Screen Assembly. Remove screws a and b holding the Back Board. Remove the 4 screws c holding each Board Slike. Remove the 3 screws c and screw e securing the Light Box Assembly.
Disconnect cabling to the front panel Control Panel, Speakers, Inputs, etc. This prevents cuts and finger prints. Do not place Fresnel Lens in the sun. This may cause fire and heat related injuries. Remove the screen assembly shown in the Cabinet Disassembly procedure. Use a slot type screw drive, and remove the pressure sensitive double sided tape.
Remove the screws a securing the Screen Holder. Remove the Screen Frame top section by removing 4 screws a. High humidity may deform the Lenticular Screen and Fresnel Lens. Refer to the Table below for proper tape length.
Place the Fresnel Lens on top of the Lenticular Screen and apply pressure at the top edge to bond them together as shown below. Use the appropriate disassembly procedure given below. Gently insert a small screwdriver between the 1.
Remove both clips by pulling them toward you. Carefully insert a small screwdriver into the 3. Place your hands at the points shown and Place your hands at the points shown and gently bow the Shield toward you and remove gently bow the Shield toward you and remove from the unit.
Then re-install the two clips. Mitsubishi 65 and 73 inch Projection TVs have been assembled in two pieces. These pieces may be separated for easier delivery and setup. The cabinet separation procedure requires two persons and varies between models. Remove the two Front Cover screws a. Figure 2 4. Remove Screw b from the front board. Disconnect the LF connector.
Figure 3 6. Remove screw c on each side of the cabinet. Figure 1 7. Remove the plastic cover on each side. Figure 5 9. Carefully lift the cabinet top until the interlock tabs clear the cabinet bottom. Figure 6 Carefully place the cabinet top on the floor Figure 2 as shown. WS Cabinet Separation Precedure 1. Remove the 4 screw covers a. Remove 4 screws b securing the top and bottom cabinet sections.
Carefully lift the cabinet top and place it on the floor. Place the cabinet bottom in the desired loca- tion. Reverse the procedure and mount the cabinet top on the cabinet bottom. Remove screw a securing the Main Chassis [and screws b in model WS]. Release the Chassis Locks on each side of the chassis. Slide the Chassis and DM Module out the rear of the unit.
Tilt upward to access the bottom of the main chassis. Perform Step 1 through 3 above. Remove 1 screw c. Slide the chassis only out the rear of the unit. High voltage should be completely discharged prior to CRT removal.
Since The CRTs receive high voltage from the HV Block, discharge by shorting the open end of the respective high voltage cable to chassis ground. Remove the Back Board. Fine Convergence Adjustments Parts Ordering Critical and Warranty Parts Designation Parts Tolerance Codes Quick Reference List Service Parts List Screen Parts List Standby Supplies Regulator Switched Supplies Regulator DM Power Supply Sync Signal Path X-Ray Protect Sound Circuit Control Circuitry Section Schematic Diagrams.
Overall Block Diagram Page 5. The specific. Media Smart Home. Magenium Solutions. EHome Design. Skip to main content. Log in Name Fisrt Name. Active Topics Unanswered Topics. Log in to post comments. Last post. Hello all, I'm not too sure of the history of this set as it was just given to me broken.
I have "some" experience with PCB's. Any ideas on where to start looking for short? Larry Dillon. First thing to check on this. MadTV man. What was your fix? I have the. I have the same promblem with a 65"? I ended up checking the. Larry, I got the identical problem from my WS Thanks, Jason. Larry I posted this perhaps. Can I see a pictures of what.
Can I see a pictures of what problem you are having now please? Here are some specific questions: What was the part number for the Convergence circuit you replaced?
Where did you buy the parts? Thanks for any assisstance you have time for. I'm not looking forward to paying a service tech. All the parts I replaced were. All the parts I replaced were on the same board.
The Conv. As for where I got them I can't remember. Just Google the part numbers. Good luck and keep us updated I hope you have a solder sucker Looking back in my e-mails I.
I hope that IC is an original. They promise "genuine. Below is from the website: STK Back in stock! Ok, cool. Also do not forget. Also do not forget the heat sink compound. I just had my convergence. No you do not need a fan in. Hi Guys,. Hi Guys, My TV ws has the same blinking problem. Hi txp, What error code did the TV give you?
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