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........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Monday, 25 February 2019

EIKI - PROJECTOR - EIKI - LC-XG110 | LC-XG210 | MJ7-XG11000 | MH7-XG21000 SERVICE HELP

 

EIKI - PROJECTOR - SERVICE HELP



EIKI - LC-XG110 | LC-XG210 | MJ7-XG11000 | MH7-XG21000


     This projector provides the following circuit protections to operate in safety.  If the abnormality occurs inside the projector, it will automatically turned off by operating one of the following protection circuits.


FUSE
     The fuse is located inside the projector.  When either the lamp indicator or the ready indicator is not illuminated, fuse may be opened.  It should be used the specified fuse:
FUSE PART NO: 645 058 8181
TYPE: 8A 250V FUSE.

HOW TO REPLACE THE FUSE.

  • Remove the cabinet top .
  • Remove the fuse from the holder, and install the new fuse.
THERMAL SWITCH 

     There is a thermal switch (SW905) inside the projector to prevent the internal temperature rising abnormally.  When the internal temperature rises near 90 degreeC, turn OFF the AC mains supply automatically.  
     The thermal switch is not reset to normal automatically, even if the internal temperature becomes normal.  Reset the thermal switch following procedure.
Check the resistance between terminals of thermal switch by using a tester.  If it has high impedance thermal switch may be in-operative.

HOW TO RESET THERMAL SWITCH
  1. Remove the cabinet top.
  2. Press the 'Reset' button on the thermal switch.  (Before press the reset button, make sure that the AC cord must be disconnected from the AC outlet.
INTERLOCK SWITCH

     The interlock switch (SW902), cuts of AC mains power supply, when the lamp cover is removed.  After opening the lamp cover for replacing the Lamp Assembly, place the lamp cover correctly otherwise the projector can not turn ON.

WARNING TEMPERATURE AND POWER FAILURE PROTECTION

     The projector will be automatically turned off when the internal temperature of the projector exceeds the normal operating temperature, or cooling fan stops or the power supplies in the projector are failed.

      If Temperature Warning [Red] and ready [Green] indicators are flashing at the same time, it may defect the cooling fans and power supply circuits.  Check fan operation and power supply lines.

Possible Causes.
  • Air filter is clogged with dust particles.  Remove the dust from the air filter.
  • Ventilation slots of the projector are blocked.
  • Ensure proper ventilation, if the projector is used in closed enclosures.

AIR FILTER CARE AND CLEANING
  1. Turn the power Off and unplug the projector from AC mains socket.
  2. Turn the projector upside down and remove air filters by pulling the latches of them upwards.
  3. Clean the air filters by brush or wash out the dust particles.  
  4. Replace each air filter properly.  Make sure that air filters are fully inserted. 
MECHANICAL DISASSEMBLIES
  • Cabinet Top Removal.
  1. Remove two screws to take the cabinet Front Top off and then remove the lens Front Cover.
  2. Remove five screws and then take the cabinet Top Upward off.
  • Main Board & Thermal Switch Removal.
  1. Remove one screw to take the thermal switch.
  2. Remove five screws to take the main board upward.
  • AV Com Board & Rear Panel Removal
  1. Remove one screw and take the Rear Panel Ass'y Upward.
  2. Remove four screws to take AV board from the Rear Panel ass'y off.
  3. Remove five screws to take the Com Board from the Rear Panel ass'y off.
  • Cabinet Front Removal
  1. Remove the lens cover upwards.
  2. Remove two screws and take the Cabinet Front Off.
  3. Remove one screw and take the R/C board off.
  4. Remove three screws and take the Filter Holder off.
  • Audio Board Removal
  1. Remove three screws and pull the Holder ass'y upward off.
  2. Remove four screws to take the Audio Board from the holder.
  • speaker Base Removal.
  1. Remove three screws and then remove the Speaker Base.
  • Optical Unit Removal
  1. Loosen one screw on the lamp cover and two screws on the lamp house and take the lamp house off from the cabinet bottom.
  2. Remove two screws and disconnect the Lamp Socket.
  3. Remove two screws and remove shield plate.
  4. Remove five screws on the optical unit, one screw on the duct ass'y and then pull the optical unit upward off.
  • Fan and Motor removal
  1. Remove four screws the take the fan off.
  2. Remove three screws to take the fan off.
  3. Remove four screws to take the duct ass'y off.
  4. Remove two screws to take the Lens Shift Motor and Sensor SW holder from the base.
  • Lamp Ballast Removal
  1. Remove four screws and then pull the ballast bard ass'y upward off.
  2. Remove three screws to take the fan off.
  3. Unhook four hooks and take the lamp ballast board off.  
  4. Disconnect the power DC board from the power AC board.
  • Power AC Board Removal.
  1. Remove four screws to take the Power Board off.
  2. Remove four screws to take the holder from the cabinet bottom.
  • Line Filter Board & Interlock Switch Removal
  1. Remove three screws to take the Filter Board Ass'y upward.
  2. Remove three screws and an other screw to take the filter board from the holder.
  3. Remove two screws to take the interlock switch from the cabinet bottom.
  • Fans Removal.
  1. Remove one screw and then take the fan off, and remove three screws to take the duct-A off
  2. Remove four screws to take the duct-B off.
  3. Remove three screws to take the duct-C off.
  4. Remove two screws to take the fan off. Remove two screws to take the fan off.
  5. Remove two screws to take the duct cover off, and remove two screws to take the fan off.
  6. Remove five screws to take the duct-D off.



EIKI - LC-XG110 | LC-XG210 | MJ7-XG11000 | MH7-XG21000 
ELECTRICAL ADJUSTMENTS

  • Circuit Adjustments.
Each circuit has been made by the fine adjustment at the Factory.  Do not attempt to adjust the following adjustments except requiring re-adjustments in servicing otherwise it may cause loss of performance and product safety.

Refer Service Adjustment Menu Operation discussed earlier post here to enter into service mode, where ever necessary.

  • Fan Voltage Adjustment.
  1. Set the Lamp Mode to "ECO" with Menu function.
  2. Enter the Service Mode and select group number [11] and item number [5].  Set data value to "1".
  3. Connect a digital volt meter to test point 'TPFAN1'(+) and Chassis ground (-Ve).
  4. Select Group number [11]  and item number [86] and adjust the voltage to be [4.5+|-o.1Vdc, by changing the data value.  Select item number [87], and adjust the voltage to be 13.8+/- 0.1Vdc by changing the data value.
  5. Connect a digital volt meter to test point 'TPFAN2'(+)  and Chassis ground.
  6. Select item number [88] and adjust the voltage to be 4.5Vdc by changing the data value.  Select item number [89], and adjust the voltage to be 13.8Vdc, by adjusting the data value.
  7. Connect the digital volt meter to test point 'TPFAN3' and Chassis ground.  
  8. Select item number [90] and adjust the voltage to be 4.5Vdc, by changing the data value.  Select item number [91] and adjust the voltage to be 13.8Vdc, by changing the data value.
  9. Select Group number [11] and item number [5].  Set data value to [0], and set the lamp mode to 'Normal' with the Menu function. 
  • Video Center Adjustment
  1. Receive a 16 step gray scale computer signal with Computer1[Analog RGB Mode].
  2. Enter the service menu.
  3. Connect digital voltmeter  to test point TP531+ve and chassis ground.
  4. Select Group number [5], item number [0], and adjust the voltage to be 7.50Vdc by changing the data value.  
  5. Connect the digital voltmeter to test point TP501+ve and Chassis ground.
  6. Select item number [1], and adjust the voltage to be 7.5Vdc by changing the data value.  
  7. Connect the digital voltmeter to test point TP561+ve and Chassis ground.
  8. Select item number [2] and adjust the voltage to be 7.5Vdc by changing the data value.
There are so many circuit adjustments more, which cannot be done without proper testing equipments,like video signal generator and oscilloscope.  Never touch to any of these adjustments, or adjust the data values there, if you find some.  it will be very difficult to set right, if any of these data values are changed.
Posted By: FRANK at 02:09
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