November 25, 2024 @ 9:05 PM UTCDragonMinded added a repair tip to Konami RTC-RAM
Original Tip Contents
Replacing with SOIC Version
The PDIP version of the RTC RAM is long discontinued meaning all of the existing stock is new old stock with aging batteries. So, if you can't find a working chip and you do not want to dremel out the battery and replace it yourself, you can instead use the SOIC version. It has an identical pinout but needs an adapter to allow it to plug into the socket that you've installed.
Get any SOIC-28 to DIP-28 SMT Adapter (1.27 mm pitch, 600 mil body), such as Chip Quik's [https://www.mouser.com/ProductDetail/Chip-Quik/PA0011C?qs=t7xnP681wgXx7CtO3%2FWBsQ%3D%3D&countryCode=US¤cyCode=USD PA0011C], and then get the SOIC version of the chip which has part number [https://www.mouser.com/ProductDetail/STMicroelectronics/M48T58Y-70MH1F?qs=ikySz0zo80%252BwJYaFRFaDjw%3D%3D&countryCode=US¤cyCode=USD M48T58Y-70MH1F]. This is paired with a Snap-Hat battery (meaning the battery is changeable without replacing the whole chip) which has the part number [https://www.mouser.com/ProductDetail/STMicroelectronics/M4T32-BR12SH1?qs=7b1TReoOb8c6VJLzljl2GA%3D%3D&countryCode=US¤cyCode=USD M4T32-BR12SH1].
August 2, 2014 @ 4:57 AM UTCDragonMinded updated a repair tip on Konami RTC-RAM
New Tip Contents
Make your life easier, get a socket
When changing out the RTC-RAM on a board, don't solder the new one in place. Solder a socket and plug the new chip in place so it may be changed again ([http://www.mouser.com/Search/Refine.aspx?Keyword=517-4828-6004-CP http://www.mouser.com/Search/Refine.aspx?Keyword=517-4828-6004-CP])