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rw:comp:amiga:2000 [2022/03/09 11:13]
super 		rw:comp:amiga:2000 [2023/09/12 18:59] (current)
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 ====Specifications==== ====Specifications====
  
 +  * A2000 Motherboard [[rw:comp:A2000:Revisions]]
  
 **Chips** **Chips**
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     * the name Paula is contrived contraction of Ports, Audio, UART and Logic, and coincidentally the chip designer's girlfriend     * the name Paula is contrived contraction of Ports, Audio, UART and Logic, and coincidentally the chip designer's girlfriend
  
-**Recap**+====Case====
  
-The best thing you can do for your 30+ yr old retro computer is to recap it. The electrolytic capacitors just loose their juice (actual fluid) over time. Keep in mind, it doesn't matter if the voltage rating on the capacitor is higher than the original rating. +**Size**
  
-The  Rev 4 motherboard needs 29 capacitors +While not exact, these should be close enough for most .
-  * (3) Radial 4.7 uF +
-  * (7) Radial 22 µF +
-  * (4) Radial 47 µF +
-  * (5) Radial 47 µF (other diameter) +
-  * (1) Radial 100 µF +
-  * (5) Radial 220 µF +
-  * (4) Radial 470 µF+
  
-The Rev 6 motherboard needs 32 capacitors +  * motherboard 
-  * (3) Radial 4.7 uF +      * 360mm deep x 414mm wide x 25mm high, overall or 
-  * (7) Radial 22 µF +      * 14 3/8" deep x 16 1/2" wide x 1" high, overall 
-  * (13) Radial 47 µF +       * depth is from the front db9 shroud to the back of the db23 shroud(s) 
-  * (1) Radial 220 µF +       * the highest component is the keyboard connector 
-  * (4) Axial 220 µF +       * the bottom mobo RF shielding flexes so the height is close but not always exact 
-  * (4) Radial 470 µF+       * slot cut-out, by the rear slots 
 +         * 15mm deep x 150mm wide or  
 +         * 5/8" deep x 5 15/16" wide
  
-The motherboard is plenty safe to do yourself. Keep in mind the capacitors by the Zorro slots can be either radial (can sitting on top) or axial (lying on its side like a log).+Next we have some odd collected data. To me, the important info is Part Number. The Rough Date is literally that. I look at most of the custom chips and pull the date code off of them. I then add a month or two (production of chips + shipping + build time) to get the Rough Date.
  
-Check out this link for some power supply recapping information. Remember, those big caps have enough stored electricity to give a serious shock or kill you. Follow proper safety procedures for discharging them before you go poking fingers or metal objects in there.  See ---   [[http://blog.worldofjani.com/?p=6375]]+^Rough Date^Mobo Ver^Part^Part Number^Reference Machine^ 
 +|1987 end|4.3|FDD tray|15A060-001|RN2303014| 
 +|1987 end|4.3|drive and power supply tray|15A059-001|RN2303014| 
 + 
 + 
 + 
 +====Storage==== 
 + 
 +  * Floppy Disk Drives ([[rw:comp:A2000:FDD]]) 
 +  * Hard Disk Drives([[rw:comp:A2000:HDD]]) 
 + 
 + 
 +====Servicing==== 
 + 
 +  * [[rw:comp:A2000:Recap]] 
 +  * [[rw:comp:amiga:Power]] notes for all Amigas
  
-     
  
 ====Troubles==== ====Troubles====
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   * C64's 6526 and Amiga 8250 are basically compatible and swappable - one difference is 4 byte BCD time of day counter being replaced with (much more useful) 3 byte binary counter   * C64's 6526 and Amiga 8250 are basically compatible and swappable - one difference is 4 byte BCD time of day counter being replaced with (much more useful) 3 byte binary counter
  
 +Real Time Clock not working
 +      * you set the DATE then try to SAVE it only to have a 'Can't find battery-backed up clock' 
 +          * 1> DATE 07-May-2023
 +          * 1> SETCLOCK SAVE
  
 ====Hacks==== ====Hacks====
Last modified: le 2022/03/09 11:13

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