Quadra 700 Delta SMP-120EB

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Macintosh Quadra 700 Delta SMP-120EB Power Supply

Preliminary Information
Release Year	1991
Leak Risk	High
Batteries	None
Mounting Technology	Through Hole
Capacitor Types	Aluminum Electrolytic
Destructive Entry	No

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Known Issues

Symptom or Problem Encountered

Causes

• No power, intermittent power, preventative maintenance

Solutions

• Replace capacitors

Disassembly Notes

There are five external screw you need to remove. To release the power connector, squeeze the retaining clip and pull it out, then squeeze the clips holding in the connector through the holes. Once opened remove the 3 connectors to the boards. There are five more screws to free the boards from the casing.

Original Parts

Delta SMP-120EB-1

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Diameter/Size	Height	Lead Spacing	Type	Brand
C1, C2 (Shouldn't need replacement)	2	470µF	200v	26mm	31mm	10mm	Radial	Rubycon
C103	1	2200 µF	10v	13mm	21mm	5mm	Radial	Rubycon
C104, C15x? (right beside 104), C150? (beside C103)	3	1000µF	16v	10mm	28mm	5mm	Radial
C252	1	470µF	25v	10mm	20mm	5mm	Radial
C253	1	470µF	16v	8mm	20mm	5mm	Radial
C612 (Daughter board), C522, C302	3	10µF	50v	5mm	11mm	5mm	Radial
C505	1	2.2µF	50v	5mm	12mm	5mm	Radial	Taicon
C551	1	1000µF	35v	13mm	26mm	5mm	Radial
C807	1	470µF	35v	10mm	20mm	5mm	Radial

Replacement Parts

Basic PCB Name

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
			Digikey

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.

Kits

• Digikey BOM: https://www.digikey.com/

Related Links

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