background image

 

 
 

 

Kramer Electronics Ltd. 

11 

12 

TROUBLESHOOTING   

If the recommended actions still do not result in satisfactory operation, please consult your Kramer Dealer.  
Before seeking technical assistance, if the problem is image related, please try to find out the screen resolution 
and refresh rate being used from the computer and if the problem only affects one particular resolution. 

 

Problem Remedy 

 

 The picture on the video 
display is black and 
white. 

1.  Check the condition of the cables being used.  In particular, a 

faulty S-Video able will cause this problem. 

2.  Make sure that the version of the Video Scaler (NTSC or PAL) 

matches the video standard of the equipment you are using: 
NTSC or PAL.  

3.  Ensure that the color controls on your computer monitor or video 

projector are all set correctly. 

4.  Ensure that the Color adjustment on the Video Scaler is not 

adjusted completely down.  It may be necessary to reset the video 
levels by pressing the + and – Buttons simultaneously. 

There is no picture on 
the video monitor. 

1.  If no LED’s on the Video Scaler are illuminated, ensure that the 

proper AC Power is being supplied to the unit and check the fuse 
(The procedure located elsewhere in this manual). 

2.  If the LED’s are illuminated: a) Check that the output switch on 

the rear panel of the Video Scaler is set to the proper position, 
either BNC or HD15, depending upon which method is used to 
connect to the display, b) Check that the output you are using 
from the Video Scaler is also connected at the unit and the 
display, and c) Check that your display is switched on and set to 
the correct input and that its Brightness and Contrast are set 
correctly. 

Some colors come out 
wrong on the video 
monitor. 

1.  Try altering the color (saturation), hue (tint) contrast and 

brightness settings on your display. These are usually set up for 
viewing computer images, which may be somewhat different 
from viewing images that have been up-converted from video.   

2.  Make sure your output cable assembly is not faulty.  Perhaps the 

Red, Green or Blue signal is not being passed through the cable. 

How can I reduce 
smearing? 

1.  Smearing usually occurs when a Composite Video input is used 

and is generally unavoidable, unless you can switch to using S-
Video.  It occurs because the luminance and color information is 
combined as one signal and the two parts have to be 'bandwidth-
limited' to avoid them interfering with each other. 

2.  Using good quality video cable will help towards reducing this 

affect. 

 

Summary of Contents for VP-721DS

Page 1: ...KRAMER ELECTRONICS LTD KRAMER ELECTRONICS Ltd USER MANUAL VIDEO SCALERS Models VP 721DS VP 722DS IMPORTANT Before proceeding please read paragraph entitled Unpacking and Contents...

Page 2: ...3 Connecting the Video Output 6 5 4 Connecting the Serial Cable 6 5 5 Connecting the AC Power 6 5 6 Connecting the Audio Control 6 5 7 Turning the Video Scaler On 6 6 ABOUT THE VIDEO SCALER 7 7 INPUT...

Page 3: ...lacing video from 24 frames per second film It offers significant enhancements when viewing movies on a large screen VT Vertical Temporal Filter can remove jagged edges and other de interlacing artifa...

Page 4: ...0x600 XGA 1024x768 VGA 640x480 SVGA 800x600 XGA 1024x768 Scaled Output Vertical Refresh Rates NTSC Version 59 94Hz PAL Version 50Hz NTSC Version 59 94Hz PAL Version 50Hz Scaled Output Horizontal Scan...

Page 5: ...are available from Kramer can enhance implementation of your Video Scaler For information regarding these accessories contact your Kramer dealer RGBHV Output Cable Assemblies 5 BNC to 5 BNC VGA style...

Page 6: ...n made by an external control device This is accomplished by connecting the unit s RS 232 port to an external control system See the section on RS 232 Control later in this manual on how to use this c...

Page 7: ...re allows input selection to be done by switching power on or off to the source video devices Manual Input Select Mode allows manual selection of which input video signal is chosen Repeatedly pressing...

Page 8: ...is pressed repeatedly until this parameter is available for adjustment This is for horizontally centering the image When this LED is illuminated pressing the Button moves the position of the image to...

Page 9: ...between VP 722SC and RS 232 remote controller with modem cable RS 232 transmission format Baud Rate 9600bps Data Bit 8 bits Parity None Stop Bit 1 bit Command Response codes of RS 232 transmission Th...

Page 10: ...TECHNICAL DATA 11 1 HD15 Connector Information Pin Use Pin Use 1 Red 0 7v max 75 Ohms 9 Passed to PC monitor pin 9 2 Green 0 7v max 75 Ohms 10 Ground 3 Blue 0 7v max 75 Ohms 11 Ground 4 ID 2 passed to...

Page 11: ...he fuse The procedure located elsewhere in this manual 2 If the LED s are illuminated a Check that the output switch on the rear panel of the Video Scaler is set to the proper position either BNC or H...

Page 12: ...including adjustment of user controls or programming These costs are the responsibility of the Kramer dealer from whom the product was purchased 3 Shipping charges HOW YOU CAN GET WARRANTY SERVICE 1...

Page 13: ...have prior approval This may be obtained from your dealer 14 COMPLIANCE NOTICE This equipment has been tested to determine compliance with the requirements of EN 55022 CE emissions standards Class B...

Page 14: ...l 972 2 654 4000 Fax 972 2 653 5369 e mail kramerel netvision net il The list of Kramer distributors appears on our web site www kramerelectronics com From the web site it is also possible to e mail f...

Reviews: