{"id":633,"date":"2023-01-23T07:57:41","date_gmt":"2023-01-23T03:57:41","guid":{"rendered":"https:\/\/www.jrtwine.com\/blog\/?p=633"},"modified":"2023-01-23T07:57:41","modified_gmt":"2023-01-23T03:57:41","slug":"replacing-bad-customs-sockets-on-galaga","status":"publish","type":"post","link":"https:\/\/jrtwine.com\/blog\/replacing-bad-customs-sockets-on-galaga\/","title":{"rendered":"Replacing Bad Customs&#8217; Sockets on Galaga"},"content":{"rendered":"<p>Had a Galaga that was reporting false ROM errors and had glitching that made me think that the three CPUs were uncoordinated.\u00a0 For example:<\/p>\n<ul>\n<li>Game would sometimes play but would have no sound, would play glitchy sounds, or get stuck on sounds<\/li>\n<li>Game would have odd graphics-related issues during its startup or sometimes during play<\/li>\n<li>Starfield had incorrect behavior &#8211; was moving backwards, was stopped, or moving at the wrong speed<\/li>\n<\/ul>\n<p><!--more--><\/p>\n<p>This led me to the three 08xx customs on the main board.\u00a0 They are responsible for the shared interface between the CPUs and would be the first place I would look if the CPUs are not playing nicely with each other.\u00a0 Since the 06xx is right next to them, I decided to get all 4.<\/p>\n<p><a href=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_2126089812.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-636 size-medium\" src=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_2126089812-300x125.jpg\" alt=\"\" width=\"300\" height=\"125\" srcset=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_2126089812-300x125.jpg 300w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_2126089812-1024x425.jpg 1024w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_2126089812-768x319.jpg 768w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_2126089812-1536x638.jpg 1536w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_2126089812.jpg 1896w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Attempting to carefully remove the chips from their sockets I&#8217;m caused the plastic socket body to stay with the chip and pull away from the contacts\/wipers leaving them on the board.\u00a0 This happened with all four of them.<\/p>\n<p><a href=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_213007478-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-637\" src=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_213007478-300x231.jpg\" alt=\"\" width=\"300\" height=\"231\" srcset=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_213007478-300x231.jpg 300w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_213007478-1024x787.jpg 1024w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_213007478-768x590.jpg 768w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_213007478-1536x1180.jpg 1536w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_213007478-2048x1574.jpg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>This was actually a blessing in disguise, because it made it easy to desolder the wipers and clean the holes\u00a0 from the top of the board.<\/p>\n<p>Was then able to carefully remove the chips from the socket bodies, and <strong><em>carefully<\/em><\/strong> clean the pins using a Bright Boy.<\/p>\n<p><a href=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221626786-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-638\" src=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221626786-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221626786-300x225.jpg 300w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221626786-1024x768.jpg 1024w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221626786-768x576.jpg 768w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221626786-1536x1152.jpg 1536w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221626786-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><a href=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221821118-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-639\" src=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221821118-225x300.jpg\" alt=\"\" width=\"225\" height=\"300\" srcset=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221821118-225x300.jpg 225w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221821118-768x1024.jpg 768w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221821118-1152x1536.jpg 1152w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221821118-1536x2048.jpg 1536w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_221821118-scaled.jpg 1920w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/a><\/p>\n<p>These older boards have one little tricky thing with them &#8211; the spaces in between the pins on ICs does not have any solder mask, so if you have a trace running in between the pins, it is <strong>exposed<\/strong>.\u00a0 So if you are not careful soldering in the replacement sockets, and have too much solder pool up on the other side, you can easily cause a short.<\/p>\n<p><a href=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_2203281552.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-635\" src=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_2203281552-300x76.jpg\" alt=\"\" width=\"300\" height=\"76\" srcset=\"https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_2203281552-300x76.jpg 300w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_2203281552-768x194.jpg 768w, https:\/\/jrtwine.com\/blog\/wp-content\/uploads\/2023\/01\/PXL_20230120_2203281552.jpg 826w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Anyway after replacing the sockets, and reinserting the custom chips, the board worked fine, and successfully burned in for a few days on the test bench.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Had a Galaga that was reporting false ROM errors and had glitching that made me think that the three CPUs were uncoordinated.\u00a0 For example: Game would sometimes play but would have no sound, would play glitchy sounds, or get stuck on sounds Game would have odd graphics-related issues during its startup or sometimes during play [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,10,7],"tags":[],"class_list":["post-633","post","type-post","status-publish","format-standard","hentry","category-repair-logs","category-ballymidway","category-repair-logs-2"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Had a Galaga that was reporting false ROM errors and had glitching that made me think that the three 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