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Problem

Solution

No power light

Unit not turned on
Unit not plugged in
Fuse blown
No power at plug

No picture

Video source not selected
No video source connected or operating
Projector/Monitor not turned on
Projector/Monitor not connected correctly
Bad video cable
Unit in freeze mode
Check brightness and contrast levels

Colors bleeding

Check LD100 termination
Check projector/monitor termination
Contrast set too high
Color set too high

Picture not stable

Check interface cables
Sync cables are swapped or not connected
Input source not selected correctly
Check input terminations
Set Sync to STD.
Projector Fast/Slow Horizontal time constant. Should be set to fast.

Incorrect colors

Tint in manual mode
Defective output cable
RGB cables are swapped
Check projector/monitor termination
Input source not selected correctly
No burst on input
RGB or Y,R-Y, B-Y Inputs not terminated.

Picture washed out

Composite input not terminated

NOTE:

To make sure that an input source is not the cause of a problem for a composite source, turn the ter-

mination switch off and connect a composite monitor to the composite input Loop input. For a R,G,B input
source, turn the three termination switches off and connect a R,G,B monitor to the R,G,B input Loop input.

To make sure that a projector is not the cause of a problem, connect a VGA monitor to the 15pin VGA output
connector and check the display to see if it is correct and if the projector is the problem. If the monitor display
shows the same problem as the projector display, then the line doubler has a problem and you should contact
our Technical Support Department.

12

TROUBLESHOOTING

Содержание LD100

Страница 1: ...The Faroudja LD100 LD100U Line Doubler Installation Operation Instructions ...

Страница 2: ...ormation 18 Copyright 1994 by Faroudja Laboratories Inc No part of this document may be copied photocopied reproduced translated or reproduced to any electronic medium or machine readable form without prior consent in writing from Faroudja Laboratories Inc The Faroudja Laboratories LD100 Line Doubler is covered by the following United States patents 4 030 121 4 179 705 4 240 105 4 262 304 4 847 68...

Страница 3: ...eration and benefits Also supplied is an overview of the proprietary tech 2 nologies utilized in this extraordinary device and an explanation of the visual improvements it provides in home video playback systems First before we discuss the LD100 let s take a quick look at the history of the current television standard Today s 525 line TV picture standard was actually developed in the 1940 s when b...

Страница 4: ...panies The following list represents those that have recog nized the value of Faroudja s solutions to imaging problems and pay for the opportunity to incorporate this technology in their advanced video products as of December 1993 Canon Microtime Conrac Mitsubishi General Instrument NAC Grass Valley NEC Hitachi Sanyo Ikegami Sharp JVC Sony Matsushita Panasonic Toshiba Awards and Achievements In ju...

Страница 5: ...lectable 75 Ohm ter minator switch is provided and should be in the ON position if the input loop is not used The Y C input uses a standard 4 pin S VHS connector This input is not available for a looped operation and is termi nated internally The RGB and Component inputs use BNC connectors As with the video input these inputs are loopable to other devices Selectable 75 Ohm terminations are provide...

Страница 6: ... now enters the Luminance Detail and Noise Reduction block where the functions of Noise Reduction and Detail Level are controlled The Luminance signal from the Luminance Detail and Noise Reduction block along with the R Y and B Y signals from the Chroma Line Doubling block feed the output transcoder and are converted to RGB signals These RGB signals are buffered and then sent to the rear panel out...

Страница 7: ...is annoying artifact is caused by imperfect separation of the color chroma and black and white luminance sig nals by the color decoder circuitry Simple techniques used commonly to separate the two signals can be effec tive most of the time but occasionally are fooled by finer pitch detail areas like the referees shirt The decoder in the LD100 has patented digital adaptive comb filter cir cuitry th...

Страница 8: ...en one doubles the scan lines and performs other signal processing The lack of high frequency detail becomes very obvious with almost all sources The resultant picture is free of scan lines but dull with a serious loss of definition The solution is to expand the high frequencies without producing annoying and pic ture degrading artifacts The bandwith expansion circuitry in the LD100 is excep tiona...

Страница 9: ...uce the reliability of the unit and lead to the possibility of overheating When the LD100 LD100U is rack mounted a mini mum of 1 25 1 rack unit height of free space is to be provided for both the top and bottom of the unit to allow for proper cooling It is also recommended that the rack be forced air cooled Rear Panel I O 11 Video Termination Switch Select ON when not looping the Video signal to o...

Страница 10: ...on of the LD100 using inputs from 1 A composite source such as a Laser Disk Player VCR or TV Receiver 2 A Y C input such as a S VHS VCR 3 An RGB input with sync on green or a Component input such as a Camera or Beta SP recorder with sync on Y If sync on green or sync on Y is not available then Sync can be interfaced using the Composite sync input All input with the exception of the Y C input have ...

Страница 11: ... 5 Component Input Component Inputs are more commonly used in the broadcast studio or post production environment The video signal in its component form Y R Y B Y is carried in a 3 wire cable with BNC type connectors e g MII D1 Betacam Betacam SP etc Press to select the Component video input PICTURE CONTROLS 4 The four rotary style picture controls BRIGHT NESS CONTRAST COLOR and TINT are factory p...

Страница 12: ...ork together to sharpen edge transitions for a punchi er picture The proprietary bandwith expansion cir cuitry contained in the LD100 is critical to its spec tacular performance Typical line doublers produce a flat soft picture The LD100 s Image Sharpness cir cuitry improves the sharp line and edge transitions making for clearer more vivid video images This is accomplished with the two controls wo...

Страница 13: ...ve output cable RGB cables are swapped Check projector monitor termination Input source not selected correctly No burst on input RGB or Y R Y B Y Inputs not terminated Picture washed out Composite input not terminated NOTE To make sure that an input source is not the cause of a problem for a composite source turn the ter mination switch off and connect a composite monitor to the composite input Lo...

Страница 14: ...cover of the LD100 Line Doubler A 4 switch Dip switch is located on the front panel Set the switch es from the table shown below If the BAUD rate is changed the LD100 MUST be powered off and then on for the new BAUD rate to take effect DIP Switch Settings Rate 1 2 3 4 1200 ON ON ON ON 2400 OFF ON ON ON 4800 ON OFF ON ON 9600 OFF OFF ON ON Factory Preset INSTALLATION Interface to the LD100 Line Dou...

Страница 15: ...R or r Select RGB Input Mode This command is a single character command X or x Select Component YUV Mode This command is a single character command Variable Adjustment Commands B or b Adjust Brightness Level This command is follow by an integer between 0 minimum and 255 maximum Example B1 or B12 or B123 ect C or c Adjust Contrast Level This command is follow by an integer between 0 minimum and 255...

Страница 16: ...ions are placed in the remote mode If a pot function is set via the remote it can be returned back to local mode by adjusting that function on the front panel This is accomplished by creating a win dow around that function when in remote mode If that function is turned beyond the window setpoint that function is returned to local mode and becomes active again Command String Examples Commands can b...

Страница 17: ...BNC connectors on each end as well as 15 pin VGA cable when using the VGA output Cable Type Maximum Length Mini BNC cables 75 ohm 100 Feet 1 15nS Foot propagation RG 59 U type cable 75 ohm 150 Feet 75 ohm precision video cable 200 Feet Belden 8281 15 pin high resolution VGA cables 25 Feet utilizing individual high resolution mini coax cables for each signal from LD100 to monitor VGA Connector Pino...

Страница 18: ...Y C Y C 3 58 Non Composite 700m Vp p Y 286mVp p C Burst RGB 700mVp p Non Composite 1Vp p Composite YUV Y 1V w Sync R Y 714mV B Y 714mV Composite Sync Negative 4Vp p Composite INPUT SIGNALS PAL 625 Line 2 1 Interlace Video 1Vp p Negative Sync 700mV Luminance Y C Y C 4 43 Non Composite 700m Vp p Y 286mVp p C Burst RGB 700mVp p Non Composite 1Vp p Composite YUV Y 1V w Sync U 700mV V 700mV Composite S...

Страница 19: ...e sell ing distributor to repair or replace at its option those products which the selling distrib utor determines to have breached this warranty within the specified period Any claims under this warranty should be made by telephone or in writing to the selling distributor or FAROUDJA Laboratories No products should be returned to the selling distributor or to FAROUDJA Laboratories without its pri...

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