27-3V07 PSU

27-3V07 PSU

Preliminary Information
Leak Risk	High
Batteries	None
Mounting Technology	Through Hole
Capacitor Types	Aluminum Electrolytic, Ceramic
Destructive Entry	No

This power supply is from a generic portable PC chassis that had branding from a computer shop but no visible manufacturer information. The system had a late SMD style AMD 386 motherboard installed in it.

Known Issues

Sparking Sound and Fish Smell

• Leaking cap(possibly from C8) fluid boiling from shorted traces

• 

  Leak from capacitor mounted above caused a short on two traces on the bottom causing charring and audible sounds

Solutions

• Clean & recap

Disassembly Notes

PSU is attached with ISA style card edge connector

Original Parts

Main PSU Board

31-1032

Fuse: 250V 6.3A

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Pitch	Temp	Type	Brand	Series
C4, C31, C32	3	470uF	16V	Through Hole	10mm		85C	Electrolytic	Panasonic	SU
C5, C9	2	47uF	50V	Through Hole	6.5mm		85C	Electrolytic	Panasonic	SU
C6	1	2200uF	6,3V	Through Hole	12mm		85C	Electrolytic	Panasonic	SU
C7	1	220uF	25V	Through Hole	8mm		85C	Electrolytic	Panasonic	SU
C8	1	6800uF	10V	Through Hole	16mm		105C	Electrolytic	Nichicon	PL(M)*
C11	1	1000uF	16V	Through Hole	10mm		105C	Electrolytic	Nichicon	PL(M)*
C12, C13	2	4.7uF	50V	Through Hole	5mm		85C	Electrolytic	Panasonic	SU
C15, C16, C20	3	1uF	50V	Through Hole	5mm		85C	Electrolytic	Panasonic	SU
C18, C21	2	100uF	160V	Through Hole	16mm		85C	Electrolytic	Panasonic	SU
C24, C28	2	470uF	35V	Through Hole	10mm		85C	Electrolytic	Panasonic	SU
C35, C36	2	680uF	200V	Through Hole	30mm	10mm	85C	Electrolytic	Nichicon	LK

*Nichicon PL capacitors will likely leak from the rubber bung (on the bottom) eventually, sometimes making it onto the capacitor leads. Replace as soon as possible.

Sub-Board

31-1022

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Pitch	Temp	Type	Brand	Series
C19	1	2.2uF	50V	Through Hole	5mm		85C	Electrolytic	Panasonic	SU
C33	1	10uF	6.3V	Through Hole	5mm		85C	Electrolytic	Panasonic	SU

Sub-Board

31-1033

Capacitor Specifications and Footprint Information

RefDes	Qty	Capacitance	Voltage	Mount	Diameter/Size	Pitch	Temp	Type	Brand	Series
C43	1	220uF	25V	Through Hole	8mm		85C	Electrolytic	Panasonic	SU

Replacement Parts

Main PSU Board

31-1032

Fuse: 250V 6.3A

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
C4, C31, C32	3	860020374012 / 16PX470MEFC8X11.5	DigiKey Mouser LCSC
C5, C9	2	860010673012 / 50PX47MEFC6.3X11	DigiKey Mouser LCSC
C6	1	860020275020 / 10YXA2200MEFC10X20	DigiKey Mouser LCSC
C7	1	860010473011 / 25PX220MEFC6.3X11	DigiKey Mouser LCSC
C8	1	10ZLQ6800MEFC12.5X30 / EKYA100ELL682ML25S / EEUFR1A682L	DigiKey Mouser LCSC
C11	1	ESC108M016AH4AA / UHD1C102MPD / 16YXJ1000M10X16	DigiKey Mouser LCSC
C12, C13	2	860010672008 / 50PX4R7MEFC5X11	DigiKey Mouser LCSC
C15, C16, C20	3	ESK105M050AC3AA / 50YXJ1M5X11	DigiKey Mouser LCSC
C18, C21	2	UVZ2C101MHD(1TO) / UVR2C101MHD	DigiKey Mouser LCSC
C24, C28	2	860010575013 / 35PX470MEFCT810X12.5	DigiKey Mouser LCSC
C35, C36	2	LGW2D681MELA35 / LGU2D681MELA	DigiKey Mouser

Sub-Board

31-1022

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
C19	1	860020672006 / 50YXF2R2MEFCT15X11	DigiKey Mouser LCSC
C33	1	860010372001 / 50PK10MEFC5X11	DigiKey Mouser LCSC

Sub-Board

31-1033

Capacitors

RefDes	Qty	Compatible Part Number	Order Links
C43	1	860010473011 / 25PX220MEFC6.3X11	DigiKey Mouser LCSC

Additional Images

• 

  DC Output ratings label. This power supply also provides some voltages used for the CRT driving electronics in the computer.

• 

  DC output side of the power supply

• 

  Mains input side of the power supply