27-3V07 PSU: Difference between revisions

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|Mounting Technology = Through Hole
|Mounting Technology = Through Hole
|Capacitor Types = Aluminum Electrolytic, Ceramic
|Capacitor Types = Aluminum Electrolytic, Ceramic
|Leak Risk = Medium
|Leak Risk = High
|Batteries = None
|Batteries = None
|Destructive Entry = No
|Destructive Entry = No
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|Electrolytic
|Electrolytic
|Nichicon
|Nichicon
|PL(M)
|PL(M)*
|-
|-
|C11
|C11
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|Electrolytic
|Electrolytic
|Nichicon
|Nichicon
|PL(M)
|PL(M)*
|-
|-
|C12, C13
|C12, C13
Line 170: Line 170:
|LK
|LK
|}
|}
<nowiki>*</nowiki>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 ===
=== Sub-Board ===
''31-1022''
''31-1022''
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|C35, C36
|C35, C36
|2
|2
|LGW2D681MELA35 / LGU2D681MELA
|LGW2D681MELA35 / LGU2D681MELA / 250USC680MEFCSN30X30
|[https://www.digikey.com/en/products/detail/nichicon/LGW2D681MELA35/1966746 DigiKey] [https://www.mouser.com/ProductDetail/Nichicon/LGU2D681MELA?qs=sGAEpiMZZMvwFf0viD3Y3dQpaEORnJu0%2FhJsJUWhZa8%3D Mouser] LCSC
|[https://www.digikey.com/en/products/detail/nichicon/LGW2D681MELA35/1966746 DigiKey] [https://www.mouser.com/ProductDetail/Nichicon/LGU2D681MELA?qs=sGAEpiMZZMvwFf0viD3Y3dQpaEORnJu0%2FhJsJUWhZa8%3D Mouser] [https://www.lcsc.com/product-detail/Horn-Type-Electrolytic-Capacitors_Rubycon-250USC680MEFCSN30X30_C2843241.html LCSC]
|}
|}
=== Sub-Board ===
=== Sub-Board ===

Latest revision as of 22:25, 1 February 2024

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

    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 / 250USC680MEFCSN30X30 DigiKey Mouser LCSC

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 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

    DC output side of the power supply

  • Mains input side of the power supply

    Mains input side of the power supply

References

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