Sharp XV Z90U. Sharp DT 200 DMD Projector – how to disassemble, how to reset the lamp

 

This SHARP projector uses a DMD chip. This very sophisticated chip contains 480,000 pixels. As with any high technology electronic equipment such as large screen TVs, video systems and video cameras, there are certain acceptable tolerances that the equipment must conform to.

This unit has some inactive pixels within acceptable tolerances which may result in inactive dots on the picture screen. This will not affect the picture quality or the life expectancy of the unit.

Service work should be performed only by qualified service technicians who are thoroughly familiar with all safety checks and servicing guidelines.

Be sure to wear sun-glasses when servicing the projector with the lamp turned “on” and the top enclosure removed.

Lamp Replacement

Note:

Since the lamp reaches a very high temperature during units operation replacement of the lamp should be done at least one hour after the power has been turned off. (to allow the lamp to cool off.)

Installing the new lamp, make sure not to touch the lamp (bulb) replace the lamp by holding its reflector.

[Never turn the power on without the lamp to avoid electric-shock or damage of the devices since the stabilizer generates high voltages at its start.]

Connection Pin Assignments

REMOVING OF MAJOR PARTS

Removing the swivel stand and the lamp box.

1-1. Remove lock lever, and remove the swivel stand.

1-2. Loosen 1 scrwew, and remove the lamp door .

1-3. Loosen 3 screws, and take out a lamp box.

Removing the side covers and the top body.

2-1. Push front end of the side cover from bottom, and remove a hook.

2-2. Pull the side cover in the direction of the arrow, and remove it.

2-3. Remove 6 screws and 1connector, and remove a top body.

Removing the main PWB.

3-1. Remove 6 screws.

3-2. Remove each connector on the main PWB.

Removing the power unit.

4-1. Remove each connector on the power PWB.

4-2. Remove 2 screws, and remove the power unit fan.

4-3. Remove 3 screws, and take out the power unit assembly.

4-4. Remove 4 screws, and remove power shield.

Removing the Ballast unit.

5-1. Remove lens shift knob.

5-2. Remove 2 screws, and remove the ballast socket.

5-3. Remove 3 screws, and remove the ballast unit.

5-4. Remove shielding plate, and remove 2 connectors on the ballast PWB.

5-5. Remove 2 screws, and remove ballast PWB.

Removing the optic mechanism unit.

6-1. Remove a connector.

6-2. Remove 6 screws, and remove the optic mechanism Unit

Removing the each other PWBs.

7-1. Remove 1 screw, and remove front R/C receiver PWB unit .

7-2. Remove 1 screw, and remove LED PWB unit.

7-3. Remove 1 screw, and remove a terminal-2 PWB unit.

7-4. Remove 2 screws, and remove an AC socket.

7-5. Remove 1 screw, and remove rear R/C receiver PWB unit.

7-6. Remove 1 screw, and remove DVI-TAN1 PWB unit.

Removing the formatter PWB.  Removing the formatter PWB.

Precautions in replacing the DMD chip

Note: Be careful not to allow dust and fingerprint on the cover glass of DMD chip and prism surface of optical engine.

1. When you fix 4screws of backer plate assembly, press backer plate to formatter PWB and fix by cross multiply step by step.

2. If something shade appears on the projection screen like Fig1, release 2 screws on mirror adjusting plate and move that plate to adjust illumination area of DMD chip.

Precautions in setting up the DMD (Digital Micro mirror Device) unit

Before connecting the formatter PWB to the optical engine, take the following steps. Look at the voltage rank marking that is on the DMD itself. Referring to this marking, set the DIP switches on the formatter PWB. And connect this PWB to the optical engine. Wrong settings will adversely affect the system performance.

Outline of the optical unit

Distinction between long and short focal length lens

• Long focal length lens: focus ring width: about 18 mm > XV-Z90U

• Short focal length lens: focus ring width: about 27 mm > DT-200

Caution when repairing without top cabinet

To repair this set without top cabinet, attach the left side body beforehand. (Since the exhaust heat gets in around the set and the temperature sensor detects it giving the TEMP error and the lamp goes off.)

RESETTING THE TOTAL LAMP TIMER

You need to reset the lamp timer every time you replace the lamp and confirm it is reset on the “Lamp Timer” menu.

• The warning lights on the projector indicate problems inside the projector.

• There are two types of warning lights: a TEMPERATURE WARNING indicator that warns you when the projector is too hot, and a LAMP REPLACEMENT indicator that warns you when to change the lamp.

• If a problem occurs, either the TEMPERATURE WARNING indicator or the LAMP REPLACEMENT indicator will illuminate in red. After turning off the power, follow the procedures given below.

• If the TEMPERATURE WARNING indicator lights up, follow the above possible solutions and then wait until the projector has cooled down completely before turning the power back on. (At least 5 minutes.)

• If the power is turned off and then turned on again, for example during a brief rest, the may be triggered, preventing the power from going on. Should this occur, unplug the power cord from the wall outlet and plug it back in again.