Hughes JVC 335 Supplement To Service Manual Download Page 3 | Manualshive

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Model 335 Supplement

3

Table of Contents

General Information ................................................................................4

1.0

Safety Precautions...........................................................................4

2.0

External Arc Lamp Power Supply ....................................................6

3.0

Brightness Level Checks..................................................................7

4.0

Electronics Module Removal and Replacement ..............................11

5.0

Lamphouse/Ignitor Removal and Replacement ...............................13

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Summary of Contents for 335

Page 1: ...Hughes JVC Technology Corporation 2310 Camino Vida Roble Carlsbad CA 92009 1416 ...

Page 2: ...rights reserved No part of this manual may be reproduced in any form without the express written permission of Hughes JVC Technology Corporation The contents of this Supplement may be revised without prior notice ILA is a trademark of Hughes JVC Technology Corporation This Supplement was produced by Hughes JVC Technology Corporation The Series 300 Projector Warranty provisions are provided in a se...

Page 3: ...le of Contents General Information 4 1 0 Safety Precautions 4 2 0 External Arc Lamp Power Supply 6 3 0 Brightness Level Checks 7 4 0 Electronics Module Removal and Replacement 11 5 0 Lamphouse Ignitor Removal and Replacement 13 ...

Page 4: ...larger 2500 watt Xenon Arc Lamp NOTE Model 335 Projectors with serial numbers 351100 or higher will not require an external power supply The additional current required by the larger arc lamp is supplied by the system power supply itself Refer to the Series 300 Service Manual 3 0 Brightness Level Checks Additional procedures required for adjustments that may be necessary on the arc lamp and extern...

Page 5: ...er to be off with power on WARNING High voltage exists on the Ignitor Board Assembly at the front left of the projector Be careful when reaching over this area when the Arc Lamp is operating Wear proper safety clothing to avoid shock hazard Also wear safety goggles to protect your eyes from Ultraviolet and Infrared exposure CAUTION To avoid possible overheating be sure to allow at least six inches...

Page 6: ...next to a 16 amp 600 volt fuse that protects the power supply Another circuit breaker on another side of the power supply applies power to the Xenon Arc Lamp in the projector Two access openings covered by plastic caps about an inch in diameter are located on the top of the power supply near the nameplate The cap furthest from the nameplate can be removed to access the Current Adjust Pot whenever ...

Page 7: ...ps keep the unit cool Be sure to allow at least six inches of clearance on both sides to prevent overheating of the unit 3 0 Brightness Level Checks If the projector has a low brightness level the items below should be checked and adjusted if necessary WARNING The following procedures require the removal of the projector covers and should be performed by Hughes JVC Certified Maintenance Technician...

Page 8: ...inside the light circle is a uniform oval that is no more than 1 2 inch or no less than 1 4 inch in diameter If the oval looks non uniform or has a flare coming from one side adjust the X Y plates on the back of the lamphouse see Figure 1 Use a standard Phillips screwdriver and loosen the two top screws on the pivot holes and slide the plates on their pivots until the shadow looks uniform While vi...

Page 9: ...the lens closer to the blue dichroic mirror This will increase the center brightness but the roll off may not be acceptable if the barrel is moved too far forward Roll off is the gradual difference in brightness on the screen from the center to the edges NOTE ON ROLL OFF In these illumination optics arc lamp and condensing lens adjustments be careful to maintain proper roll off It is possible to g...

Page 10: ...sitive wire will provide a more accurate reading If this value is low increase it see CAUTION below with the current adjust pot on the External Arc Lamp Power Supply or the System Power Supply refer to the NOTES in Section 4 4 B and 4 5 and Figure 4 4 in the Series 300 Service Manual This adjustment screw is located under a plastic protective cover about an inch in diameter on the top of the Exter...

Page 11: ...rightness level in lumens equals 300 x 11 3300 lumens 4 0 Electronics Module Removal and Replacement The Electronics Module is the entire assembly to the rear of the Arc Lamp and optics assemblies It consists of the System Power Supply High Voltage Power Supply Main PCB Card Cage and CRT Housing Assembly Refer to Figure 2 2 in the Series 300 Operator s Manual the CRT Housing Assembly is next to th...

Page 12: ...e card cage back 10 Remove the two hex screws in the base of the electronics module under the card cage 11 Tilt the card cage forward 12 Remove the electronics module two people by grasping the handles at the rear and the lip under the system power supply in the front When removing be careful not to bump the CRT cooling bellows see Figure 4 8 in the Service Manual The bellows will not be covered u...

Page 13: ... the System Power Supply and unplugging the projector from the AC wall outlet 2 Disconnect the high voltage leads from the Ignitor the two wires shown at the right in Figure 1 NOTE DO NOT REMOVE THE CABLES FROM THE ARC LAMP LEAVE BOTH CABLES ATTACHED TO PREVENT MISALIGNING THE ARC LAMP INTERIOR COMPONENTS 3 Disconnect the fan connector on the left side of the Lamphouse 4 Disconnect the squirrel ca...

Page 14: ...e associated wiring To remove the Ignitor Assembly 1 Turn power off and unplug the projector 2 Remove the front and rear covers 3 Clearly label and remove the four 4 cables connected to the Ignitor Assembly 4 Remove the three 3 hex screws that attach the Ignitor Mounting Board to the projector NOTE The larger washer must be replaced to the hex screw at the left front of the Ignitor Mounting Board ...

Page 15: ...ary by placing a small amount of super glue under them prior to replacing the Ignitor Mounting Board Replace the Ignitor Assembly in reverse order When replacing the cables make sure the negative cables go on first and that the positive cable to the front of the Ignitor Assembly is placed over them otherwise the point where they cross over each other will get in the way of the fan when the front c...

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