JVC AV-P720U 15 pg instruction manual on the AV-P720U Visual Presenter (250KB, - Page 13

ENGLISH TROUBLE SHOOTING IPlease check the following list of possible problems and their solutions first. If you cannot solve the problem(s) after consulting the list, stop using the product at once and contact your retailer or the nearest JVC customer service. Problem No images Check points • Check the power cord is properly plugged in. • Is the power switch ON? • Are all the cables correctly connected? • Is the camera head set at the correct position? • Is the setting value of IRIS LEVEL suitable? • Is the correct signal chosen by the INPUT SELECT button? Images are out of focus. • Is the close-up lens correctly attached? • Isn't the text material too close to the lens; is it placed more than 90mm above the stage? • Is the slide in the slide film holder over-magnified? • Auto focusing may at times cause difficulty in focusing. (See page 9) Images are hazy. Dust is visible • Check the close-up lens or camera lens for dirt. If so, clean them using commercially available lens cleaning products. Dark images • Is the lighting device turned on? • Is the setting value for IRIS suitable? Stripe patterns appear on images of printed text. • The halftone dot of printed text and the pixel of the microelectronics devices of the filmed images by the camera may interfere with each other to cause coloured stripes. In such a case, change the image size slightly using the ZOOM button. Abnormal tone • If AUTO WHITE BALANCE is used: in the case of single color materials it may be difficult to obtain correct white balance. If so, use the AUTO WHITE SET button to correct the tone. • If MANUAL WHITE BALANCE is used: correct the tone by increasing the setting values of 'RED LEVEL' and 'BLUE LEVEL' on the ON SCREEN ADJUSTMENT screen. Gritty images • If the surrounding area is dark, images may become gritty as the image signals are amplified electronically by AGC. Use the lighting device. Beats appear in images • If the equipment is used near any appliance that emits strong radio waves, beats may appear in the images. In that case, move the equipment away from the offending appliance. Pressing buttons will not operate the equipment • If two buttons are pressed at the same time or a button is tapped on continuously, they may not operate correctly. Press buttons one at a time. Tinting around letter edges • Depending on the materials you want to present, using the ZOOM function at its maximum or near maximum capacity may cause coloring around the edges of letters and lines in the mate- rials. In that case the problem can be minimized by reducing the image size using the ZOOM WIDE button or changing the image to B/W. Use the ON SCREEN Adjustment function to change the image to B/W (See pages 11 & 12). 13