User manual HITACHI CM2073A

[. . . ] If the display does not operate properly, unplug the display and call your dealer. This colour display is equipped vith a three-vire type plug. This plug will only fit into a grounding-type power outlet. This is a safety feature, do not defeat the safety purpose of the grounding-type plug. [. . . ] This document lists the ad. iustmcnt fcat, rlrrs of thr 20738 available to the dealer. Other ad. justment. s exist which are not readily accessible and should not be attempted by untrained personnel. The CM2073A comes in various configurations including displays for line rates of nominal 50kHz and 60kHz operations, line synchronisation on the green video drive9 separate line synchronisation, with or without D. D. C. (Dig:ital Dynamic Convergence) and models with internal timing to preferred video driving boards. Before any of the adjustments below are attempted, please ensure that the model has been chosen appropriately from the options listed on page 16 of the operating guide. The adjustments listed in this note permit some deviations from this table, but it is important that the most appropriate model be chosen. , ' 1 ADJUSTMENTS Before attempting any of the following adjustments, the display should be powered up for a period of 15 minutes prior to the ad-justment. the green power indicator adjacent to the power switch comes on, If it does not; a> Check power source and connections b) Check fuse c) Call a service engineer I . :. 10 2. Advance the contrast and brightness controls fully clockwise. If no picture appears check the video drive and source connections particularly green for sync on green models or composite sync if there is a separate line. No picture will appear without the sync signal. When a display appears note the stability of the displayed image. If it is not stable or it is displayed from centre, switch off the mains supply and remove outer plastic case only by removing four screws from the rear panel and two screws from the centre portion. It may be convenient to remove and replace signal and power cables at this stage, since they pass through the rear cover. See Fig. 10. SCREW i COVER BACK COVER BOTTOM COVER " SC ii E L"J 1 Fig. Power up and adjust (if necessary) the horizontal hold control with plastic trimmer (Fig. ll). Note that it is important that a plastic trimmer is used. Otherwise the adjustment could result in a short circuit and breakdown of display. Adjust vertical hold control (if necessary) with plastic trimmer. Either of the two previous controls should stabilize the picture. With a stable picture, note the size and its position of the picture. Any adjustment shoud be made in the following sequence. [. . . ] Die Zeitraume hierfur werden gesondert bestimmt. 14 Die Zulassungsbehorde ist berechtigt, einzelne Gerate nach eigener Auswahl anzufordern, urn das Vorliegen der fur den Strahlenschutz wesentlichen Merkmale zu uberprufen oder uberprufen zu lassen. Die Gerate sind auf Verlangen im Originalzustand anzuliefern und angemessene Zeit zur Verfugung zu stellen. Die Herstellung und die Stuckprufung sind durch einen von der Zulassungsbehorde bestimmten Sachverstandigen uberwachen zu lassen. HH 22/86 Ro zu versehen sowie mit einem Hinweis folgenden Mindestinhalts : "Die in diesem Gerat entstehende Rontgenstrahlung ist ausreichend abgeschirmt. [. . . ]