Replacing RISC PSUs with ATX - Revision history

Daghdha: Formatting

2023-11-04T01:42:26Z

Formatting

← Older revision		Revision as of 01:42, 4 November 2023
Line 37:		Line 37:

	The ATX PWK_OK line should be used for when the motherboard need a "Power Sense" line		The ATX PWK_OK line should be used for when the motherboard need a "Power Sense" line
	The ATX PSU_ON line should be connected to ground. I joined a spare ground(COM) line to the PS_ON line. Some people will normally wire the PSU_ON and its associated ground through a switch so that they can turn the PSU on and off. Some PSUs have their own power switch on the PSU, which eliminates the need for that other switch.
			The ATX PSU_ON line should be connected to ground. I joined a spare ground(COM) line to the PS_ON line.

			Some people will normally wire the PSU_ON and its associated ground through a switch so that they can turn the PSU on and off.

			Some PSUs have their own power switch on the PSU, which eliminates the need for that other switch.

	Consult the schematics and service manuals for the machine in question for power pin layouts.		Consult the schematics and service manuals for the machine in question for power pin layouts.

Daghdha: 43P-150 link

2023-11-04T01:41:12Z

43P-150 link

← Older revision		Revision as of 01:41, 4 November 2023
Line 50:		Line 50:

	Example: PS for [https://forums.sgi.sh/index.php?threads/o2-power-supply-basics.117/ SGI O2s]		Example: PS for [https://forums.sgi.sh/index.php?threads/o2-power-supply-basics.117/ SGI O2s]

			Example PS for the [https://forum.vcfed.org/index.php?threads/ibm-7043-43p-150-power-supply.73490/ IBM RS/6000 Model 43P-150]

Daghdha: Formatting

2023-11-04T01:33:50Z

Formatting

← Older revision		Revision as of 01:33, 4 November 2023
Line 48:		Line 48:

	Example: PS for [https://dogemicrosystems.ca/pub/Sun/System_Handbook/Sun_syshbk_V4.1/Systems/Sun4c/DCPOWER_Sony_1038_85W.html sun4c pizzaboxes]		Example: PS for [https://dogemicrosystems.ca/pub/Sun/System_Handbook/Sun_syshbk_V4.1/Systems/Sun4c/DCPOWER_Sony_1038_85W.html sun4c pizzaboxes]

	Example: PS for [https://forums.sgi.sh/index.php?threads/o2-power-supply-basics.117/ SGI O2s]		Example: PS for [https://forums.sgi.sh/index.php?threads/o2-power-supply-basics.117/ SGI O2s]

Daghdha: Formatting

2023-11-04T01:33:17Z

Formatting

← Older revision		Revision as of 01:33, 4 November 2023
Line 3:		Line 3:

	For those who are not comfortable doing that or if the PSU is beyond repair, it is possible to replace the PSU with a modern PC power supply like an ATX, ITX, or STX power supply.		For those who are not comfortable doing that or if the PSU is beyond repair, it is possible to replace the PSU with a modern PC power supply like an ATX, ITX, or STX power supply.

	[http://See%20https://en.wikipedia.org/wiki/ATX Wikipedia - ATX] for a more detailed list of voltages and Molex connector parts.		[http://See%20https://en.wikipedia.org/wiki/ATX Wikipedia - ATX] for a more detailed list of voltages and Molex connector parts.

	For this work, it highly recommended that you use an ATX Molex 24pin extender cable to make these changes. This allows you cheaply fix any mistakes and not damage the original supply.		For this work, it highly recommended that you use an ATX Molex 24pin extender cable to make these changes. This allows you cheaply fix any mistakes and not damage the original supply.

Line 13:		Line 15:

	There are two alternatives to replacing the pre-existing power supply connection		There are two alternatives to replacing the pre-existing power supply connection

	1. Cut the require wires from the ATX extender cable and original PSU cable and soldering them together.		1. Cut the require wires from the ATX extender cable and original PSU cable and soldering them together.

	2. Creating a new adapter by using either crimping new Molex wires or using pre-crimped ones. This option is good if the connector on the motherboard is a Molex connector.,		2. Creating a new adapter by using either crimping new Molex wires or using pre-crimped ones. This option is good if the connector on the motherboard is a Molex connector.,


	The connectors themselves will have the pin numbers written on the plug to make it easier to determine which one is which		The connectors themselves will have the pin numbers written on the plug to make it easier to determine which one is which

	The connector pin numbering should be as follows.		The connector pin numbering should be as follows.
	With the latch facing up it goes		With the latch facing up it goes
	------\|---\|----		------
	12 11 10 9 8 7
	6 5 4 3 2 1
			\|--------\|----\|-----\|

			12 11 10 9 8 7

			6 5 4 3 2 1

			\|------------------\|

	The ATX PWK_OK line should be used for when the motherboard need a "Power Sense" line		The ATX PWK_OK line should be used for when the motherboard need a "Power Sense" line
Line 28:		Line 41:
	Consult the schematics and service manuals for the machine in question for power pin layouts.		Consult the schematics and service manuals for the machine in question for power pin layouts.

	Example: PS for [https://dogemicrosystems.ca/pub/Sun/System_Handbook/Sun_syshbk_V4.1/Systems/SUNERGY/DCPOWER_Fuji_1101_70W.html sun4m lunchboxes]		Example: PS for [https://dogemicrosystems.ca/pub/Sun/System_Handbook/Sun_syshbk_V4.1/Systems/SUNERGY/DCPOWER_Fuji_1101_70W.html sun4m lunchboxes]

	Example: PS for [https://dogemicrosystems.ca/pub/Sun/System%20Handbook/Sun%20syshbk%20V4.1/Systems/Sun4c/DCPOWER%20Mitsubishi%201055%2065W.html sun4c lunchboxes]		Example: PS for [https://dogemicrosystems.ca/pub/Sun/System%20Handbook/Sun%20syshbk%20V4.1/Systems/Sun4c/DCPOWER%20Mitsubishi%201055%2065W.html sun4c lunchboxes]

	Example: PS for [https://dogemicrosystems.ca/pub/Sun/System%20Handbook/Sun%20syshbk%20V4.1/Systems/Sun4c/DCPOWER%20Mitsubishi%201055%2065W.html sun4c lunchboxes]		Example: PS for [https://dogemicrosystems.ca/pub/Sun/System%20Handbook/Sun%20syshbk%20V4.1/Systems/Sun4c/DCPOWER%20Mitsubishi%201055%2065W.html sun4c lunchboxes]

	Example: PS for [https://dogemicrosystems.ca/pub/Sun/System_Handbook/Sun_syshbk_V4.1/Systems/Sun4c/DCPOWER_Sony_1038_85W.html sun4c pizzaboxes]		Example: PS for [https://dogemicrosystems.ca/pub/Sun/System_Handbook/Sun_syshbk_V4.1/Systems/Sun4c/DCPOWER_Sony_1038_85W.html sun4c pizzaboxes]
	Example: PS for [https://forums.sgi.sh/index.php?threads/o2-power-supply-basics.117/ SGI O2s]		Example: PS for [https://forums.sgi.sh/index.php?threads/o2-power-supply-basics.117/ SGI O2s]

Daghdha: Created page with "== Overview == Power Supplies for RISC systems like the RS/6000, SPARC, Alpha, etc have an increasing risk of failure due to leaking capacitors. The most common fix is to replace the capacitors in the PSU before they leak and destroy the logic board. This does require good re-soldering skills and being comfortable working with high(110V or 220V) voltage components. For those who are not comfortable doing that or if the PSU is beyond repair, it is possible to replace the..."

2023-11-04T01:30:16Z

Created page with "== Overview == Power Supplies for RISC systems like the RS/6000, SPARC, Alpha, etc have an increasing risk of failure due to leaking capacitors. The most common fix is to replace the capacitors in the PSU before they leak and destroy the logic board. This does require good re-soldering skills and being comfortable working with high(110V or 220V) voltage components. For those who are not comfortable doing that or if the PSU is beyond repair, it is possible to replace the..."

New page

== Overview ==
Power Supplies for RISC systems like the RS/6000, SPARC, Alpha, etc have an increasing risk of failure due to leaking capacitors. The most common fix is to replace the capacitors in the PSU before they leak and destroy the logic board. This does require good re-soldering skills and being comfortable working with high(110V or 220V) voltage components.

For those who are not comfortable doing that or if the PSU is beyond repair, it is possible to replace the PSU with a modern PC power supply like an ATX, ITX, or STX power supply.
[http://See%20https://en.wikipedia.org/wiki/ATX Wikipedia - ATX] for a more detailed list of voltages and Molex connector parts.
For this work, it highly recommended that you use an ATX Molex 24pin extender cable to make these changes. This allows you cheaply fix any mistakes and not damage the original supply.

== Findings ==
Each make and model will have its own unique connectors. For example, the RS/6000 Model 43P-150 uses most of the AT and ATX connectors, but needs specific voltages on various pin.
Using a electrical pin extractor tool is when you are not splicing and soldering wires together.

Removing wires from a pre-exiting Molex connector is difficult and it is likely that the barbs at the end of the connector will be crushed. This prevents the wire from being re-used because it will come loose from the socket. If possible, it is best to purchase a new 24pin female receptacle and male plug as well the appropriate male plugs for the motherboard if you cannot remove the wires cleanly.

There are two alternatives to replacing the pre-existing power supply connection
1. Cut the require wires from the ATX extender cable and original PSU cable and soldering them together.
2. Creating a new adapter by using either crimping new Molex wires or using pre-crimped ones. This option is good if the connector on the motherboard is a Molex connector.,

The connectors themselves will have the pin numbers written on the plug to make it easier to determine which one is which
The connector pin numbering should be as follows.
With the latch facing up it goes
------|---|----
12 11 10 9 8 7
6 5 4 3 2 1

The ATX PWK_OK line should be used for when the motherboard need a "Power Sense" line
The ATX PSU_ON line should be connected to ground. I joined a spare ground(COM) line to the PS_ON line. Some people will normally wire the PSU_ON and its associated ground through a switch so that they can turn the PSU on and off. Some PSUs have their own power switch on the PSU, which eliminates the need for that other switch.

Consult the schematics and service manuals for the machine in question for power pin layouts.

Example: PS for [https://dogemicrosystems.ca/pub/Sun/System_Handbook/Sun_syshbk_V4.1/Systems/SUNERGY/DCPOWER_Fuji_1101_70W.html sun4m lunchboxes]
Example: PS for [https://dogemicrosystems.ca/pub/Sun/System%20Handbook/Sun%20syshbk%20V4.1/Systems/Sun4c/DCPOWER%20Mitsubishi%201055%2065W.html sun4c lunchboxes]
Example: PS for [https://dogemicrosystems.ca/pub/Sun/System%20Handbook/Sun%20syshbk%20V4.1/Systems/Sun4c/DCPOWER%20Mitsubishi%201055%2065W.html sun4c lunchboxes]
Example: PS for [https://dogemicrosystems.ca/pub/Sun/System_Handbook/Sun_syshbk_V4.1/Systems/Sun4c/DCPOWER_Sony_1038_85W.html sun4c pizzaboxes]
Example: PS for [https://forums.sgi.sh/index.php?threads/o2-power-supply-basics.117/ SGI O2s]