Differences

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--- rw:comp:a2000:power [2022/06/27 14:43]
super created
+++ rw:comp:a2000:power [2022/10/26 17:29] (current)
super
@@ Line 1: / Line 1: @@
 =====Amiga 2000 Power Notes=====
-**Power Supply**
+====Power Supply====
   * Molex 2139 KK 3.96MM 14pin
@@ Line 7: / Line 7: @@
   * the standard rating is a 200W  power supply
-^Pin^Name^Wire Color^
+^Pin^Name^Wire Color^Notes^
-|1|+5V|yellow|
+|1|+5V|yellow|total +5V load is 20.5A|
-|2|+5V|yellow|
+|2|+5V|yellow||
-|3|+5V|yellow|
+|3|+5V|yellow||
-|4|+5V|yellow|
+|4|+5V|yellow||
-|5|GND1|blue|
+|5|GND1|blue||
-|6|GND2|blue|
+|6|GND2|blue||
-|7|GND3|blue|
+|7|GND3|blue||
-|8|GND4|blue|
+|8|GND4|blue||
-|9|+12V|orange|
+|9|+12V|orange|total +12V load is 8A|
-|10|KEY|none|
+|10|KEY|none||
-|11|-12V|red|
+|11|-12V|red|total -12V load is .3A|
-|12|+5V USER|green|
+|12|+5V USER|green||
-|13|-5V|white|
+|13|-5V|white|total -5V load is .3A|
-|14|TICK|
+|14|TICK||
@@ Line 36: / Line 36: @@
     * is this just their hardware adapter or all atx adapters?
-**ATX PC Power Supply**
+====Replacement Power Supplies====
+Sadly, you can't just substitute any ATX in for the A2000, see below.  There is a small after market for replacement power supplies. See the A500 Power page for an easy Cisco swap.
+**Meanwell**
+Meanwell has become a standard for replacing power supplies for the 8 and 16 bit lines.
+  * MPQ-200B
+    * medical rated, high quality + high cost
+    * rated for 200W
+    *  output
+      * +5V at 15A (vs 20.5A)
+      * +12V at 7A (vs 8A)
+      * -5V at 2A (vs .3A)
+      * -12V at 2A (vs .3A)
+  * RQ-125B
+    * only 125W!
+    *  output
+      * +5V at 11A (vs 20.5A)
+      * +12V at 4.5A (vs 8A)
+      * -5V at 1A (vs .3A)
+      * -12V at .5A (vs .3A)
+----
+====ATX PC Power Supply====
+Here's the standard PC power supply to compare to Amiga's needs.  Nowadays, there is seldom a -5V power line. If you can find an old AT power supply you're almost guaranteed a -5V. Keep an eye out at yard sales and thrift stores. A quick and easy indicator is if a 5.25" or 3.5" drive is in the PC. This //usually// means it is an old power supply so the -5V may be there.
 ^Pin^Name^Color^Description^
@@ Line 64: / Line 91: @@
 |23|+5V|Red|+5 VDC|
 |24|COM|Black|Ground|
   * /PSON activated by pressing and releasing the power button while the power supply is in standby mode. Activating /PSON connects the power supply's /PSON input to ground, thereby switching the power supply to full-on condition.

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