Eiki LC-X71 LC-X71L service manual Circuit Adjustments, Output Voltage adjustment, +16V adjustment

Page 25

Electrical Adjustments

Circuit Adjustments

CAUTION: The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the follow- ing adjustments except requiring the readjustments in servicing otherwise it may cause loss of per- formance and product safety.

WARNING : USE UV RADIATION EYE AND SKIN PROTECTION DURING SERVICING

CAUTION: To prevent suffer of UV radia- tion, those adjustments must be completed within 25 minutes.

[Adjustment Condition]

Input signal

 

 

 

16 steps gray scale pattern

 

Video signal

1.0Vp-p/75terminated, 16 steps gray

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

scale, white 100% and 50% pattern

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Composite video signal)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Computer signal

0.7Vp-p/75terminated, 16 steps gray

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

scale, 1 line dot, 100% and 50% pat-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tern (XGA)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Component Video signal

0.7Vp-p/75terminated, 16 steps gray

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

scale (480i, 480p, 720p and1080i-60)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

format)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Picture control mode

“STANDARD” mode unless otherwise

White 100%

Black 100%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

noted.

Note:

*Please refer to “Service Adjustment Menu Operation” for entering to the service mode and adjusting the service data.

zOutput Voltage adjustment

After replacing the Power Board readjust the Output volt- age adjustment as follows.

1.Connect a digital voltmeter to pin 1 (+) of K6A and chassis ground (-).

2.Adjust the voltage by using VR601 on the power board as following.

AC Input

Reading

230V

370 ±2Vdc

120V

356 ±2Vdc

Caution:

Be sure to connect the lamp when taking this adjust- ment.

x+16V adjustment

1.Receive the 16-step gray scale video signal with Input 3 [Video] mode.

2.Connect a digital voltmeter to pin 3 (+) of CN6A and chassis ground (-).

3.Adjust the voltage to be 15.8 ±0.1Vdc by using VR681 on the power board.

Note:

The Power Board for replacing is already adjusted in the factory, so it is not required to perform readjustment of item1 and 2.

Note:

The Power Board for replacing is already adjusted in the factory, so it is not required to perform readjustment of item1 and 2.

- 25 -

Image 25
Contents Original Version Contents Safety Precautions Safety InstructionsSpecifications Interlock switch Thermal switchCircuit Protections FuseRecommendation Cabinet Top removal Mechanical DisassembliesCabinet Front removal AV, I/F Board & Rear Panel removal Main Board removalFN905 Optical Unit removal Lamp Ballast Unit removalFN906 Power Board Power Board removalPrism Base removal Filter Board & Interlock SW & Thermal SW removal Interlock SwitchFans FN901, FN902 removal SW902Optical Parts Disassemblies Relay Lens disassemblyProjection Lens removal Relay LensOptical filter HCP Polarized Glass-In removalLCD Panel/Prism Ass’y Polarized Glass-Out and Wide view Glass removalOut Optical Unit Top removal Condenser Lens disassemblyDescription Locations and DirectionsImportant Notice on LCD Panel/Prism Assy Replacement LCD Panel/Prism Ass’y ReplacementMounting Procedure LCD Panel/Prism Ass’y removalLCD Panel/Prism Assy Type-R How to reset Lamp Replace Counter Lamp ReplacementProcedure Reset the Lamp Replace Counter, see below explanationOptical Adjustments Electrical Adjustments Adjustments after Parts ReplacementContrast adjustment Optical AdjustmentsBefore Adjustment Main BoardWhite b Slot B Moving of slot B Slot D Moving of Slot D Condenser Lens adjustmentWhite b Relay lens-Out adjustmentMoving of slot B White Cyan Screw D Moving of slot D Service Adjustment Menu Operation Electrical AdjustmentsIC802 is not defective Output Voltage adjustment Circuit Adjustments+16V adjustment Adjustment ConditionPsig adjustment Fan Voltage adjustmentVideo Center adjustment PC Black Level adjustmentInput adjustment PC Input adjustmentCommon Center adjustment ⁄0PC Gamma-shift adjustment⁄3AV White Balance adjustment ⁄2AV Gamma-shift adjustmentMain Board Test Points and LocationsService Adjustment Data Table Temp. warning setting RC KEY DisableFactory use Factory default setting Not used DDC SettingPanel L/R setting Adjustment for AV input210 290 300 301 302 303 CXD3807311 M62393FP 310 AD9882400 Composite Ntsc Composite PAL 401 410 411 420 421 422 423 424 425Scart YCbCrRGB Video 426 427 428 430 431 432 433 434 435RGB Video 480P RGB Video 575PHdcp 575P 440 Hdcp 480PHdcp 720P-60 443 Hdcp 720P-50RGB-Video 1080-25psf 451 452 453 454 455 600 620RGB-Video 1080-24psf RGB-Video 1080P-60De-interlacer setting Auto PC Adjustment680 681 690 700 701 711 713 715 Auto Calibration721 23pull down setting 720 22pull down setting975 Ghost Drift Color shading correctionChassis Description Chassis block diagramsChassis over view IC3012 Video signal processing stageK00D Audio signal processing stageK20H K20G K20FFAN location FAN control stageFN904 FN903 FN901 FN905Motor control stage Lamp control stageYellow Serial bus control stageRed GreenIC8702 3V2 Power supply lines & power failure detectionLED indication and projector condition Indicators Projector ConditionError information table Power failure detection systemPin Signal Name Connection Error Information Failure area Power failure detection treeK10R Diagnosis procedure Diagnosis of power failure with RS-232C portError Error Code Error Information Error history logSystem Control & I/O Port Table IC801, HD6417727F Control Port FunctionsWE0 Pwreset Netsw Parallel I/O Expander IC4801, TIC81592GP M62393 IIC Bus D/A ConverterWaveforms Cleaning with air spray CleaningAD8183ARU/AD8185ARU IC Block DiagramsCXD3531R Digital Signal Driver & Timing Generator , IC401 IC Block Diagrams IC Block Diagrams IC Block Diagrams IC Block Diagrams Divide TDA1517ATW Audio Output, IC1681, IC1682 Read Description in the parts list Electrical Parts ListFilter Board F601 OUT of Circuit BoardAssemblied Boards TERMINAL1 Board 147 TR 2SA1037AK-S-T146 405 0417 TR 2SA1037K IC IDT70V24S15PFG 7316 C2591 C365 C568 NP-ELECT Carbon R2213 R329 R4477 R5212 R6791 Network 0X4 1/32W Network 10KX4 1/32W FILTER,LP 34MHZ Zener Diode 02DZ6.2YTPH3 IC AD8185ARUZ-REEL7 C2007 R1111 Zener Diode UDZS-TE-1712B ZD UDZS-TE-176.2B Resister Diode RF101L2S POS-SOLID Filter Board Mechanical Parts List 23-b 100 Optical Parts List65 Red 71R/L 71-a R 71-b G 71-c B 71-e G = no use 103 Key to better communications Schematic Diagrams Printed Wiring Board Drawings Diagrams & DrawingsIC IC Pin description of diode, transistor and ICDiagrams & Drawings LC-X71, LC-X71L

LC-X71 LC-X71L specifications

The Eiki LC-X71 and LC-X71L are advanced multimedia projectors designed for a range of applications, from education to corporate environments. Known for their outstanding image quality and impressive clarity, these projectors combine technological innovation with user-friendly features, making them ideal for presentations, lectures, and various visual displays.

One of the defining characteristics of the LC-X71 series is its high brightness output. With 6000 ANSI lumens, these projectors ensure clear and vibrant images, even in well-lit rooms. This level of brightness is complemented by a native XGA resolution (1024 x 768), providing sharp details and vivid colors. The LC-X71L model features a slightly enhanced brightness, making it suitable for larger venues or where ambient light cannot be controlled.

The Eiki LC-X71 and LC-X71L utilize a DLP (Digital Light Processing) technology that enhances color accuracy and contrast. This technology minimizes the visibility of pixels, ensuring smooth images that remain sharp at various viewing distances. Moreover, the projectors incorporate a high contrast ratio, which contributes to deep blacks and bright whites, making them perfect for presentations with complex graphics.

Another noteworthy feature is the flexible connectivity options. The LC-X71 series offers multiple input terminals, including HDMI, VGA, and USB, allowing for seamless integration with various devices, from laptops to video players. This versatility enables users to easily switch between different content sources. Additionally, the projectors support wireless presentation capability, enhancing user convenience and reducing the clutter of cables.

User convenience doesn’t stop at connectivity. The LC-X71 and LC-X71L are designed for easy installation and maintenance. Their lightweight design and compact dimensions facilitate portability, making them easy to move between locations. They also feature a filter-free design, reducing maintenance efforts and ensuring long-term reliability.

In terms of energy efficiency, both models are equipped with Eco Mode, which extends lamp life and reduces power consumption. The lamp life can reach up to 4000 hours, depending on usage, making it a cost-effective solution for prolonged use.

In conclusion, the Eiki LC-X71 and LC-X71L projectors deliver exceptional performance, combining high brightness, versatile connectivity, and user-friendly features. Their technological advancements cater to various needs, ensuring that they stand out in the competitive market of multimedia projectors.