REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
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Thursday 1 October 2020

SHARP XV Z90U, SHARP DT 200 DLP THEATRE PROJECTOR CIRCUIT SCHEMATIC DIAGRAM, HOW TO ENTER THE SERVICE MODE, EXPLODED VIEW – HOW TO DISASSEMBLE, HOW TO RESET THE LAMP

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

 The SharpVision XV-Z90U Projector is a SVGA Home Theater Projector. This lamp based projector is capable of displaying 600 Lumens at its brightest setting with a native resolution of 800x600 . The internal DLP technology touts higher contrast, less visible pixels and more portability. The unique projector lens has the ability to be shifted to allow greater flexibility in positioning the projector relative to the screen. This projector was first available for purchase in October 2002 and has been discontinued by SharpVision.


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.



 



 









2 - Sharp XV Z90U, Sharp DT 200 DLP theatre projector FULL circuit diagram, how to enter the service mode, exploded view:


 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.
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.

How to reset the total lamp timer.

• 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.
Entering the adjustment process mode
There are following two methods.
Press the SW2002 on the MAIN PWB.
Press the following keys in this order.
ADJ UP > ADJ UP > ADJ DOWN > ADJ DOWN > ADJ RIGHT > ADJ LEFT > ENTER.
Adjustment mode process menu
Main unit schematic






Formatter schematic





Power unit schematic
Cabinet and mechanical part exploded view
Product type Theatre Projector
Model XV-Z90U/DT-200
Video system PAL/PAL 60/PAL-M/PAL-N/SECAM/NTSC 3.58/NTSC 4.43/DTV 480i/480P/720P/1080i
Display method DLP chip, RGB optical shutter method
DLP panel Panel size: 0.55” (140mm)
Display method: Single Panel Digital Micro mirror Device (DMD™) by Texas Instruments
Drive method: Digital Light Processing (DLP)
No. of dots: 480,000 dots (800 [H] x 600 [V])
Lens 1–1.2 x zoom lens, F1.75–2.04, f=28–33.5 mm (XV-Z90U) F2–2.4, f=16.9–20.2 mm (DT-200)
Projection lamp 150 W SHP lamp
Horizontal resolution 520 TV lines (NTSC 3.58 input)
RGB input signal 15-PIN MINI D-SUB CONNECTOR (INPUT 2):
RGB separate/composite sync/sync on green type analogue input: 0–0.7 Vp-p, positive,75 Ω terminated
HORIZONTAL SYNC. SIGNAL: TTL level (positive/negative) or composite sync (Apple only)
VERTICAL SYNC. SIGNAL: Same as above
Pixel clock 12–110 MHz
Vertical frequency 43–75 Hz
Horizontal frequency 15–70 kHz
Computer control signal 9-pin D-sub connector (RS-232C Port)
Rated voltage AC 100–240 V
Input current 3.6 A
Rated frequency 50/60 Hz
Power consumption 200 W

The SharpVision XV-Z90U Projector is a SVGA Home Theater Projector. This lamp based projector is capable of displaying 600 Lumens at its brightest setting with a native resolution of 800x600 . The internal DLP technology touts higher contrast, less visible pixels and more portability. The unique projector lens has the ability to be shifted to allow greater flexibility in positioning the projector relative to the screen. This projector was first available for purchase in October 2002 and has been discontinued by SharpVision.


Posted By: FRANK at 07:45
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