{"id":2358,"date":"2018-08-28T08:27:00","date_gmt":"2018-08-28T07:27:00","guid":{"rendered":"https:\/\/www.domesday86.com\/?page_id=2358"},"modified":"2018-08-28T09:15:35","modified_gmt":"2018-08-28T08:15:35","slug":"l-drop-out-correction-module-calibration","status":"publish","type":"page","link":"https:\/\/www.domesday86.com\/?page_id=2358","title":{"rendered":"L &#8211; Drop-out correction Module calibration"},"content":{"rendered":"<h1>13.5Mhz Clock generation calibration<\/h1>\n<p>This calibration sets the clock generator on the drop-out correction module to 13.5Mhz.\u00a0 Note: This is a partial calibration, please see the service manual for more details.<\/p>\n<h2>Setting up the oscilloscope<\/h2>\n<p>Connect the scope channel 1 to pin 15 of 7203 (TL8704P) and ground the probe on 10L2.\u00a0 Set up channel 1 to AC coupled, 500mV vertical divisions and 100ms horizontal divisions and measure frequency.<\/p>\n<figure id=\"attachment_2359\" aria-describedby=\"caption-attachment-2359\" style=\"width: 800px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/www.domesday86.com\/wp-content\/uploads\/2018\/08\/Module-L-Layout.png\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2359\" src=\"https:\/\/www.domesday86.com\/wp-content\/uploads\/2018\/08\/Module-L-Layout.png\" alt=\"\" width=\"800\" height=\"190\" \/><\/a><figcaption id=\"caption-attachment-2359\" class=\"wp-caption-text\">Module L - Adjustment points<\/figcaption><\/figure>\n<h2>Adjustment points<\/h2>\n<p>Adjust coil 5007 until the clock generator outputs 13.5MHz to pin 15 of 7203 (anticlockwise increases clock speed) as shown in the following trace (note that it is not necessary to play a disc when performing this test):<\/p>\n<figure id=\"attachment_2360\" aria-describedby=\"caption-attachment-2360\" style=\"width: 800px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/www.domesday86.com\/wp-content\/uploads\/2018\/08\/Module-L-IC-7203-pin-15.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2360\" src=\"https:\/\/www.domesday86.com\/wp-content\/uploads\/2018\/08\/Module-L-IC-7203-pin-15.png\" alt=\"\" width=\"800\" height=\"503\" \/><\/a><figcaption id=\"caption-attachment-2360\" class=\"wp-caption-text\">Module L - IC 7203 pin 15<\/figcaption><\/figure>\n<h1>Input to CCD delay calibration<\/h1>\n<p>TBA<\/p>\n<h1>MTF Calibration<\/h1>\n<p>TBA<\/p>\n","protected":false},"excerpt":{"rendered":"<p>13.5Mhz Clock generation calibration This calibration sets the clock generator on the drop-out correction module to 13.5Mhz.\u00a0 Note: This is a partial calibration, please see the service manual for more details. Setting up the oscilloscope Connect the scope channel 1 to pin 15 of 7203 (TL8704P) and ground the probe on 10L2.\u00a0 Set up channel 1 to AC coupled, 500mV <a class=\"more-link\" href=\"https:\/\/www.domesday86.com\/?page_id=2358\">Continue reading <span class=\"screen-reader-text\">  L &#8211; Drop-out correction Module calibration<\/span><span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2358","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.domesday86.com\/index.php?rest_route=\/wp\/v2\/pages\/2358","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.domesday86.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.domesday86.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.domesday86.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.domesday86.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2358"}],"version-history":[{"count":3,"href":"https:\/\/www.domesday86.com\/index.php?rest_route=\/wp\/v2\/pages\/2358\/revisions"}],"predecessor-version":[{"id":2369,"href":"https:\/\/www.domesday86.com\/index.php?rest_route=\/wp\/v2\/pages\/2358\/revisions\/2369"}],"wp:attachment":[{"href":"https:\/\/www.domesday86.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2358"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}