Atari SC1224

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Atari SC1224
Preliminary Information
Release Year 1986
Leak Risk Medium
Batteries None
Mounting Technology Through Hole
Capacitor Types Aluminum Electrolytic, Tantalum, Ceramic
Destructive Entry Cutting silicone on neck socket
CRT Guides
General Information · Repair Cautions

The SC1224 is a lower resolution color monitor for the Atari ST line of computers. "SC1224" was more of a feature set designation than an actual model though because there were multiple versions of the display made by different manufactures. So be sure that the one you may be working on is the same as what may be listed here.

Known Issues

Black Screen

Causes

  • Suspected cap failures on neck board

Solutions

  • recap

Disassembly Notes

CRT neck is glued with silicone to the socket. Cutting it and pulling it out will let you remove it but there are still wires soldered directly to the board. - More info

Original Parts

Gold Star CRT Neck Board

Gold Star, P/N 111-705A, 94V-0, GSEP-2112

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Temp Type Brand Series
C514, C513, C512 3 1uF 160V Through Hole Radial 6.3mm 85C Aluminum Electrolytic Korea Chemi-con SM ?
C504, C506 2 10uF 16V Through Hole Radial 5mm 85C Aluminum Electrolytic Korea Chemi-con SM ?
C511 1 10uF 160V Through Hole Radial 10mm 85C Aluminum Electrolytic Korea Chemi-con SM ?
C501 1 10uF 16V Through Hole Radial 5mm 85C Aluminum Electrolytic Samwha SA

Gold Star Power Supply

Gold Star, P/N 111-694A, 94V-0, GSEP-2112

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
C904 1 330uF 250V Through Hole Radial 30mm 40mm 10mm 105C Aluminum Electrolytic Panasonic TS-NH
C942, C943 2 1000uF 25V Through Hole Radial 16mm 85C Aluminum Electrolytic Samyoung SM
C906, C931 2 100uF 50V Through Hole Radial 10mm 85C Aluminum Electrolytic Samyoung SM
C941 1 47uF 160V Through Hole Radial 16mm 85C Aluminum Electrolytic Samwha HR ?
C923 1 47uF 10V Through Hole Radial 5mm 85C Aluminum Electrolytic Samyoung SM
C912 1 10uF 50V Through Hole Radial 5mm 85C Aluminum Electrolytic Samyoung SM
C913 1 100uF 10V Through Hole Radial 6.3mm 85C Aluminum Electrolytic Samyoung SM

Replacement Parts

Gold Star CRT Neck Board

The parts picked here are all higher temp capacitors which are highly recommended when replacing neck board caps due to the proximity to the cathode heater.

Capacitors
RefDes Qty Compatible Part Number Order Links
C514, C513, C512 3 UPS2C010MED1TD Digikey 🔎
C504, C506, C501 3 UPS1C100MDD Digikey 🔎
C511 1 UCA2C100MPD1TD Digikey 🔎
Full BOM Digikey

Gold Star Power Supply

Capacitors
RefDes Qty Compatible Part Number Order Links
C904 1 EKMQ401VSN331MR35S Digikey 🔎
C942, C943 2 UBT1V102MHD1TN Digikey 🔎
C906, C931 2 UPJ1H101MPD6 Digikey 🔎
C941 1 UPJ2C470MHD Digikey 🔎
C923 1 UVZ1A470MDD Digikey 🔎
C912 1 50YXJ10M5X11 Digikey 🔎
C913 1 UPJ1A101MED Digikey 🔎
Full BOM Digikey

References