{"id":35740,"date":"2023-10-10T06:52:48","date_gmt":"2023-10-10T06:52:48","guid":{"rendered":"https:\/\/pcbjunkie.net\/?page_id=35740"},"modified":"2024-11-11T14:49:18","modified_gmt":"2024-11-11T14:49:18","slug":"pacman-galaxian-ac-to-dc-conversion","status":"publish","type":"page","link":"https:\/\/pcbjunkie.net\/index.php\/guides\/pacman-galaxian-ac-to-dc-conversion\/","title":{"rendered":"Pacman \/ Galaxian AC to DC conversion"},"content":{"rendered":"\n<p>This is a quick guide on how to convert a Galaxian or Pacman PCB to run on DC. This will allow you to use a DC powersupply or connect the game board to a JAMMA setup. We will focus on a simple and efficient conversion that can be quickly reversed if needed. <\/p>\n\n\n\n<p>Pictures provided are from a Pacman board. The procedure for Galaxian, parts impacted and their approximate position is pretty much the same.<\/p>\n\n\n\n<p>First locate the area that where you need to make changes on the PCB. This is the yellow box in the following picture:<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1571\" height=\"1067\" data-id=\"35741\" src=\"https:\/\/pcbjunkie.net\/wp-content\/uploads\/2023\/10\/pacman_pcb_larged.jpg\" alt=\"\" class=\"wp-image-35741\" srcset=\"https:\/\/pcbjunkie.net\/wp-content\/uploads\/2023\/10\/pacman_pcb_larged.jpg 1571w, https:\/\/pcbjunkie.net\/wp-content\/uploads\/2023\/10\/pacman_pcb_larged-300x204.jpg 300w, https:\/\/pcbjunkie.net\/wp-content\/uploads\/2023\/10\/pacman_pcb_larged-768x522.jpg 768w, https:\/\/pcbjunkie.net\/wp-content\/uploads\/2023\/10\/pacman_pcb_larged-1536x1043.jpg 1536w\" sizes=\"auto, (max-width: 767px) 89vw, (max-width: 1000px) 54vw, (max-width: 1071px) 543px, 580px\" \/><\/figure>\n<\/figure>\n\n\n\n<p>Focusing on the area, locate the +5V and +12V rectification diodes. Image below shows their location.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"377\" height=\"741\" data-id=\"35742\" src=\"https:\/\/pcbjunkie.net\/wp-content\/uploads\/2023\/10\/pacman_pcb_acdc.jpg\" alt=\"\" class=\"wp-image-35742\" srcset=\"https:\/\/pcbjunkie.net\/wp-content\/uploads\/2023\/10\/pacman_pcb_acdc.jpg 377w, https:\/\/pcbjunkie.net\/wp-content\/uploads\/2023\/10\/pacman_pcb_acdc-153x300.jpg 153w\" sizes=\"auto, (max-width: 377px) 100vw, 377px\" \/><\/figure>\n<\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Galaxian<\/h4>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"721\" height=\"726\" src=\"https:\/\/pcbjunkie.net\/wp-content\/uploads\/2024\/11\/galaxpwrschematics.png\" alt=\"\" class=\"wp-image-36371\" srcset=\"https:\/\/pcbjunkie.net\/wp-content\/uploads\/2024\/11\/galaxpwrschematics.png 721w, https:\/\/pcbjunkie.net\/wp-content\/uploads\/2024\/11\/galaxpwrschematics-298x300.png 298w, https:\/\/pcbjunkie.net\/wp-content\/uploads\/2024\/11\/galaxpwrschematics-150x150.png 150w, https:\/\/pcbjunkie.net\/wp-content\/uploads\/2024\/11\/galaxpwrschematics-100x100.png 100w\" sizes=\"auto, (max-width: 721px) 100vw, 721px\" \/><\/figure>\n\n\n\n<p>Put a wire link across or short the diodes: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Diode D4 (A15)&nbsp;<\/li>\n\n\n\n<li>Diode D5 (A15)&nbsp;<\/li>\n\n\n\n<li>Diode D6 (A14)\u00a0<\/li>\n\n\n\n<li>Diode D7 (A14)<\/li>\n<\/ul>\n\n\n\n<p>The pinout of the board now becomes:<\/p>\n\n\n\n<table id=\"tablepress-pngx\" class=\"tablepress tablepress-id-pngx\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">SOLDER SIDE<\/th><th class=\"column-2\">PARTS SIDE<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr class=\"row-2\">\n\t<td class=\"column-1\">GND<\/td><td class=\"column-2\">GND<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">GND<\/td><td class=\"column-2\">GND<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">+12V<\/td><td class=\"column-2\">+12V<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">+12V<\/td><td class=\"column-2\">+12V<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\">SPK+<\/td><td class=\"column-2\">SPK-<\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-1\">VSYNC *<\/td><td class=\"column-2\">VBLUE *<\/td>\n<\/tr>\n<tr class=\"row-8\">\n\t<td class=\"column-1\">VGREEN *<\/td><td class=\"column-2\">VRED *<\/td>\n<\/tr>\n<tr class=\"row-9\">\n\t<td class=\"column-1\">GND<\/td><td class=\"column-2\">VGND<\/td>\n<\/tr>\n<tr class=\"row-10\">\n\t<td class=\"column-1\">NC<\/td><td class=\"column-2\">TABLE<\/td>\n<\/tr>\n<tr class=\"row-11\">\n\t<td class=\"column-1\">P2RIGHT<\/td><td class=\"column-2\">P2LEFT<\/td>\n<\/tr>\n<tr class=\"row-12\">\n\t<td class=\"column-1\">P2B1<\/td><td class=\"column-2\">P1B1<\/td>\n<\/tr>\n<tr class=\"row-13\">\n\t<td class=\"column-1\">P1RIGHT<\/td><td class=\"column-2\">P1LEFT<\/td>\n<\/tr>\n<tr class=\"row-14\">\n\t<td class=\"column-1\">P2START<\/td><td class=\"column-2\">P1START<\/td>\n<\/tr>\n<tr class=\"row-15\">\n\t<td class=\"column-1\">SVC<\/td><td class=\"column-2\">TEST<\/td>\n<\/tr>\n<tr class=\"row-16\">\n\t<td class=\"column-1\">COIN2<\/td><td class=\"column-2\">COIN1<\/td>\n<\/tr>\n<tr class=\"row-17\">\n\t<td class=\"column-1\">COUNT1<\/td><td class=\"column-2\">NC<\/td>\n<\/tr>\n<tr class=\"row-18\">\n\t<td class=\"column-1\">NC<\/td><td class=\"column-2\">NC<\/td>\n<\/tr>\n<tr class=\"row-19\">\n\t<td class=\"column-1\">COINRET<\/td><td class=\"column-2\">NC<\/td>\n<\/tr>\n<tr class=\"row-20\">\n\t<td class=\"column-1\">+5V<\/td><td class=\"column-2\">+5V<\/td>\n<\/tr>\n<tr class=\"row-21\">\n\t<td class=\"column-1\">+5V<\/td><td class=\"column-2\">+5V<\/td>\n<\/tr>\n<tr class=\"row-22\">\n\t<td class=\"column-1\">GND<\/td><td class=\"column-2\">GND<\/td>\n<\/tr>\n<tr class=\"row-23\">\n\t<td class=\"column-1\">GND<\/td><td class=\"column-2\">GND<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-pngx from cache -->\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Pacman<\/h4>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"708\" height=\"715\" src=\"https:\/\/pcbjunkie.net\/wp-content\/uploads\/2024\/11\/pacpwrschematics.png\" alt=\"\" class=\"wp-image-36372\" srcset=\"https:\/\/pcbjunkie.net\/wp-content\/uploads\/2024\/11\/pacpwrschematics.png 708w, https:\/\/pcbjunkie.net\/wp-content\/uploads\/2024\/11\/pacpwrschematics-297x300.png 297w, https:\/\/pcbjunkie.net\/wp-content\/uploads\/2024\/11\/pacpwrschematics-150x150.png 150w, https:\/\/pcbjunkie.net\/wp-content\/uploads\/2024\/11\/pacpwrschematics-100x100.png 100w\" sizes=\"auto, (max-width: 708px) 100vw, 708px\" \/><\/figure>\n\n\n\n<p>Put a wire link across or short the diodes: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Diode D8 (A15)&nbsp;<\/li>\n\n\n\n<li>Diode D7 (A15)&nbsp;<\/li>\n\n\n\n<li>Diode D3 (1N40004)&nbsp;<\/li>\n\n\n\n<li>Diode D4 (1N40004)<\/li>\n<\/ul>\n\n\n\n<p>The pinout of the board now becomes:<\/p>\n\n\n\n<table id=\"tablepress-pnpc\" class=\"tablepress tablepress-id-pnpc\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">SOLDER SIDE<\/th><th class=\"column-2\">PARTS SIDE<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr class=\"row-2\">\n\t<td class=\"column-1\">GND<\/td><td class=\"column-2\">GND<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">GND<\/td><td class=\"column-2\">GND<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">+12V<\/td><td class=\"column-2\">+12V<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">+12V<\/td><td class=\"column-2\">+12V<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\">COINMUL*<\/td><td class=\"column-2\">P2DOWN<\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-1\">VSYNC<\/td><td class=\"column-2\">VBLUE<\/td>\n<\/tr>\n<tr class=\"row-8\">\n\t<td class=\"column-1\">VGREEN<\/td><td class=\"column-2\">VRED<\/td>\n<\/tr>\n<tr class=\"row-9\">\n\t<td class=\"column-1\">GND<\/td><td class=\"column-2\">VGND<\/td>\n<\/tr>\n<tr class=\"row-10\">\n\t<td class=\"column-1\">P1DOWN<\/td><td class=\"column-2\">TABLE<\/td>\n<\/tr>\n<tr class=\"row-11\">\n\t<td class=\"column-1\">P2RIGHT<\/td><td class=\"column-2\">P2LEFT<\/td>\n<\/tr>\n<tr class=\"row-12\">\n\t<td class=\"column-1\">P2UP<\/td><td class=\"column-2\">P1UP<\/td>\n<\/tr>\n<tr class=\"row-13\">\n\t<td class=\"column-1\">P1RIGHT<\/td><td class=\"column-2\">P1LEFT<\/td>\n<\/tr>\n<tr class=\"row-14\">\n\t<td class=\"column-1\">P2START<\/td><td class=\"column-2\">P1START<\/td>\n<\/tr>\n<tr class=\"row-15\">\n\t<td class=\"column-1\">SVC<\/td><td class=\"column-2\">TEST<\/td>\n<\/tr>\n<tr class=\"row-16\">\n\t<td class=\"column-1\">COIN2<\/td><td class=\"column-2\">COIN1<\/td>\n<\/tr>\n<tr class=\"row-17\">\n\t<td class=\"column-1\">COUNT1<\/td><td class=\"column-2\">SPK-*<\/td>\n<\/tr>\n<tr class=\"row-18\">\n\t<td class=\"column-1\">RSTCRD<\/td><td class=\"column-2\">SPK+*<\/td>\n<\/tr>\n<tr class=\"row-19\">\n\t<td class=\"column-1\">COINRET<\/td><td class=\"column-2\">NC<\/td>\n<\/tr>\n<tr class=\"row-20\">\n\t<td class=\"column-1\">+5V<\/td><td class=\"column-2\">+5V<\/td>\n<\/tr>\n<tr class=\"row-21\">\n\t<td class=\"column-1\">+5V<\/td><td class=\"column-2\">+5V<\/td>\n<\/tr>\n<tr class=\"row-22\">\n\t<td class=\"column-1\">GND<\/td><td class=\"column-2\">GND<\/td>\n<\/tr>\n<tr class=\"row-23\">\n\t<td class=\"column-1\">GND<\/td><td class=\"column-2\">GND<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-pnpc from cache -->\n\n\n\n<p><\/p>\n\n\n\n<p>These steps are optional and are the same for both boards. These parts used for regulation which if using DC should now be handled by the external power supply. <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Remove or clip 2 legs from IR1, leaving ground intact (78GU I.C.)<\/li>\n\n\n\n<li>Remove (D44VM4 transistor)<\/li>\n\n\n\n<li>Remove R52 (50Ohm 5W resistor)<\/li>\n\n\n\n<li>Remove R53 (4Ohm 10W resistor)<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>This is a quick guide on how to convert a Galaxian or Pacman PCB to run on DC. This will allow you to use a DC powersupply or connect the game board to a JAMMA setup. We will focus on a simple and efficient conversion that can be quickly reversed if needed. Pictures provided are &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/pcbjunkie.net\/index.php\/guides\/pacman-galaxian-ac-to-dc-conversion\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Pacman \/ Galaxian AC to DC conversion&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":360,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-35740","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/pages\/35740","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/comments?post=35740"}],"version-history":[{"count":4,"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/pages\/35740\/revisions"}],"predecessor-version":[{"id":36376,"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/pages\/35740\/revisions\/36376"}],"up":[{"embeddable":true,"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/pages\/360"}],"wp:attachment":[{"href":"https:\/\/pcbjunkie.net\/index.php\/wp-json\/wp\/v2\/media?parent=35740"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}