View source for IBM 8512 VGA Monitor, 12"

{{DeviceAlerts}}
{{InfoboxDevice
|Title = IBM 8512 VGA Monitor
|Picture = 
|Release Year = 1987
|Mounting Technology = Through Hole
|Capacitor Types = Aluminum Electrolytic, Tantalum, Ceramic, Polymer
|Leak Risk = Medium
|Batteries = None
|Destructive Entry = No
}}
IBM's first generation VGA display released with the IBM PS/2 computer line.
==Known Issues==
As a first generation VGA monitor, the 8500 series has its shortcomings. A dot pitch of 0.41 makes the display fuzzy and monitor dims noticeably when drawing light-colored screens, though this is considered a design flaw, not a sign of failing components. There are several known maintenance issues which are detailed in the link to the IBM 8512 page on repairfaq.org (see [[#Related Links]])
===Power Supply Failure / Squealing / Clicking===
====Causes====
*Blown filter capacitors (line or transformer side)
====Solutions====
*Replace line filter capacitors in power supply.
*Replace larger capacitors
*Consider complete recap.
*Use low-ESR capacitors at output
=== Monitor Turns Red ===
==== Causes ====
* Neck PCB capacitor failure
*Output / driver transistors on neck PCB (see repairfaq.org link in [[IBM 8512 VGA Monitor, 12"#Related Links|Related Links]])
==== Solutions ====
* Recap Neck PCB
*Test transistors on neck PCB
==Disassembly Notes==
When replacing caps located under the EMF shielding, be careful to note capacitor heights for the taller capacitors (C340, C354, C357) if the EMF shielding is to be retained. Experience suggests EMF shields may not be necessary for reliable operation - YMMV. 
==Original Parts==
===Main (9979800001) and Neck (9979800002) PCBs===
''NOTES:''
#All capacitors listed below are through-hole mounted aluminum electrolytics.
#All capacitances are micro Farads (uF).
#Capacitors C100 - C400 are located under the EMF shielding (near RGB pots)
#Capacitors C400 - C700 are located in the horizontal / vertical control circuitry (middle section of board to flyback)
{| class="wikitable sortable"
|+Main PCB 9979800001 (rev 04 and 08) - Capacitor [[Capacitor Specifications|Specifications]] and [[Part Footprints|Footprint]] Information
!RefDes
!Qty 
!Capacitance
!Voltage
!Diameter/Size
!Temp
!Series
!Notes
|-
|C101, C201, C301
|3
|47 μF
|16 V
|
|
|
|BI-POLAR
|-
|C104, C111, C114, C204, C211, C214, C304, C311, C314
|9
|47 μF
|16 V
|
|
|
|
|-
|C106, C206, C306
|3
|4.7 μF
|25 V
|
|
|
|BI-POLAR
|-
|C108, C208, C308, C352
|4
|4.7 μF
|50 V
|
|
|
|
|-
|C113, C213, C313
|3
|1 μF
|50 V
|
|
|
|
|-
|C115, C215, C315
|2
|0.47 μF
|50 V
|
|
|
|
|-
|C340, C354, C357
| 3
| 470 μF
| 25 V
|
|
|
|
|-
|C350
|1
|100 μF
|16 V
|
|
|
|
|-
|C353
|1
|100 μF
|25 V
|
|
|
|
|-
|C355, C413, C515, C557, C752
|5
|10 μF
|50 V
|
|
|
|C557 not present on rev 04
|-
|C356
|1
|100 μF
|16 V
|
|
|
|
|-
|C401, C516, C556, C601, C602, C751
|6
|4.7 μF
|50 V
|
|
|
|
|-
|C405, C414
|2
|100 μF
|25 V
|
|
|
|
|-
|C408
|1
|33 μF
|16 V
|
|
|
|
|-
|C412
|1
| 2.2 μF
|50 V
|
|
|
|
|-
|C416
|1
|330 μF
|35 V
|
|
|
|
|-
|C425
|1
|100 μF
|35 V
|
|
|
|
|-
|C428
|1
|470 μF
|35 V
|
|
|
|
|-
|C503, C620
|2
|1 μF
|50 V
|
|
|
|C620 not present on rev 08
|-
|C514
|1
|470 μF
|25 V
|
|
|
|
|-
|C534, C609
|2
|220 μF
|16 V
|
|
|
|
|-
|C537
|1
|22 μF
|160 V
|
|
|
|
|-
|C545
|1
|22 μF
|250 V
|
|
|
|
|-
|C550
|1
|1000 μF
|25 V
|
|
|
|
|-
|C552
|1
|220 μF
|25 V
|
|
|
|
|-
|C554
|1
|33 μF
|35 V
|
|
|
|
|-
|C555, C604
|2
|47 μF
|25 V
|
|
|
|
|-
|C622
|1
|33 μF
|25 V
|
|
|
|
|-
|C753
|1
|1 μF
|250 V
|
|
|
|
|}
{| class="wikitable sortable"
|+Neck PCB 9979800002 (rev 05 and 07) - Capacitor [[Capacitor Specifications|Specifications]] and [[Part Footprints|Footprint]] Information
!RefDes
!Qty
!Capacitance
!Voltage
!Diameter / Size
!Temp
!Notes
|-
|C804, C814, C824
|3
|1 μF
|250 V
|
|
|
|-
|C806, C816, C826
|3
|2.2 μF
|315 V
|
|
|
|-
|C842, C844, C850
|3
|10 μF
|100 V
|
|
|
|-
|C843
|1
|47 μF
|16 V
|
|
|
|-
|C853
|1
|1 μF
|100 V
|
|
|
|}
==Replacement Parts==
===Main PCB===
Note: Capacitors C100-C400 have not been measured to ensure the replacements fit within the EMF shield
{| class="wikitable sortable"
|+Capacitors
!RefDes
!Qty
!Compatible Part Number
!Order Links
|-
|C101, C201, C301
|3
|ECE-A1EN470U / UES1C470MPM
|[https://www.digikey.com/en/products/detail/panasonic-electronic-components/ECE-A1EN470U/227620 DigiKey] [https://www.mouser.com/ProductDetail/Panasonic/ECE-A1EN470U?qs=xerK1%2Fx51jhVv%2FMlT1wPmg%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Nichicon-UES1C470MPM_C1669286.html LCSC]
|-
|C104, C111, C114, C204, C211, C214, C304, C311, C314
|9
|860020372004 / 25PK47MEFC5*11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020372004/5727028 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020372004?qs=0KOYDY2FL28if5xRhEUGgw%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-25PK47MEFC5-11_C109370.html LCSC]
|-
|C106, C206, C306
|3
|UVP1V4R7MDD
|[https://www.digikey.com/en/products/detail/nichicon/UVP1V4R7MDD/2539601 DigiKey] [https://www.mouser.com/ProductDetail/Nichicon/UVP1V4R7MDD?qs=8PivYkE13dlC0AWLPnYJXw%3D%3D Mouser]
|-
|C108, C208, C308, C352
|4
|860020672008 / 50PK4R7MEFC5*11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020672008/5727091 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020672008?qs=0KOYDY2FL29ss4NKHUPOsQ%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-50PK4R7MEFC5-11_C110148.html LCSC]
|-
|C113, C213, C313
|3
|860020672005 / 50YXJ1M5X11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020672005/5727088 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020672005?qs=0KOYDY2FL29w5cS8aahRvQ%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-50YXJ1M5X11_C88782.html LCSC]
|-
|C115, C215, C315
|2
|860020672004 / 50MH50R47MEFCT54X5
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020672004/5727087 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020672004?qs=0KOYDY2FL2%252B5oYLRTn768Q%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-50MH50R47MEFCT54X5_C473215.html LCSC]
|-
|C350, C356
|2
|860010372006 / 25PX100MEFC5X11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860010372006/5726847 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860010372006?qs=0KOYDY2FL29Ggp2VaG847w%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-25PX100MEFC5X11_C88745.html LCSC]
|-
|C353
|1
|860020473008 / 25PX100MEFC5X11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020473008/5727062 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020473008?qs=0KOYDY2FL29hXRmIX2%252BovQ%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-25PX100MEFC5X11_C88745.html LCSC]
|-
|C355, C413, C515, C557, C752
|5
|860020672010 / 50PK10MEFC5X11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020672010/5727093 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020672010?qs=0KOYDY2FL2%252BaHkqkc1q4lw%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-50PK10MEFC5X11_C109368.html LCSC]
|-
|C401, C516, C556, C601, C602, C751
|6
|860020672008 / 50PK4R7MEFC5*11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020672008/5727091 Digikey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020672008?qs=0KOYDY2FL29ss4NKHUPOsQ%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-50PK4R7MEFC5-11_C110148.html LCSC]
|-
|C405, C414
|2
|860020473008 / 25PX100MEFC5X11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020473008/5727062?s=N4IgTCBcDaIBwDYAMSxICwHYDMK4gF0BfIA DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020473008?qs=0KOYDY2FL29hXRmIX2%252BovQ%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-25PX100MEFC5X11_C88745.html LCSC]
|-
|C408
|1
|860020372003 / 35YXF33MEFC5X11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020372003/5727027 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020372003?qs=0KOYDY2FL29eBCJtdW%252BRzQ%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-35YXF33MEFC5X11_C88830.html LCSC]
|-
|C412
|1
|860020672006 / 50YXF2R2MEFC5X11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020672006/5727089 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020672006?qs=0KOYDY2FL28W7SLhCnyRPw%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-50YXF2R2MEFC5X11_C88785.html LCSC]
|-
|C416
|1
|860020575013 / 35ZLH330MEFCT810X12.5
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020575013/5727182 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020575013?qs=0KOYDY2FL29Rz4pZR9rUiw%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-35ZLH330MEFCT810X12-5_C2927585.html LCSC]
|-
|C425
|1
|860020573008 / 35PK100MEFC6.3*11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020573008/5727177 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020573008?qs=0KOYDY2FL2%2FoGR9eInsheg%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-35PK100MEFC6-3-11_C109367.html LCSC]
|-
|C428
|1
|860020575014 / 35PX470MEFC10X12.5
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020575014/5727183 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020575014?qs=0KOYDY2FL2%252B6asg5xDCJKQ%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-35PX470MEFCT810X12-5_C424230.html LCSC]
|-
|C503, C620
|2
|860020672005 / 50YXJ1M5X11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020672005/5727088 DigiKey][https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020672005?qs=0KOYDY2FL29w5cS8aahRvQ%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-50YXJ1M5X11_C88782.html LCSC]
|-
|C514
|1
|860020474014 / 25PX470MEFC8X11.5
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020474014/5727068 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020474014?qs=0KOYDY2FL2%252BfCDf5E%252Bq6Tw%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-25PX470MEFC8X11-5_C88730.html LCSC]
|-
|C534, C609
|2
|860020373010 / 16PX220MEFC6.3*11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020373010/5727034 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020373010?qs=0KOYDY2FL28D3VoSvrCvYA%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-16PX220MEFC6-3-11_C129236.html LCSC]
|-
|C537
|1
|UVR2C220MPD / 250BXC22MEFC10X16
|[https://www.digikey.com/en/products/detail/nichicon/UVR2C220MPD/588903 DigiKey] [https://www.mouser.com/ProductDetail/Nichicon/UVR2C220MPD?qs=3PWENkzFzi66ZIZ0ODIU8w%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-250BXC22MEFC10X16_C338179.html LCSC]
|-
|C545
|1
|UVY2E220MPD1TD / 250BXC22MEFC10X16
|[https://www.digikey.com/en/products/detail/nichicon/UVY2E220MPD1TD/4329182 DigiKey] [https://www.mouser.com/ProductDetail/Rubycon/250BXC22MEFC10X16?qs=T3oQrply3y8DV8AK9fli5A%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-250BXC22MEFC10X16_C338179.html LCSC]
|-
|C550
|1
|860020475018 / 25PK1000MEFC10*16
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020475018/5727072 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020475018?qs=0KOYDY2FL29%2F2GIHZNCdMQ%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-25PK1000MEFC10-16_C109451.html LCSC]
|-
|C552
|1
|860020474012 / 25PX220MEFC6.3X11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020474012/5727066 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020474012?qs=0KOYDY2FL2%2FsQ%252B3pl9Drfg%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-25PX220MEFC6-3X11_C88855.html LCSC]
|-
|C554
|1
|860020572005 / 35YXF33MEFC5X11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020572005/5727174 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020572005?qs=0KOYDY2FL29zne3wOZxuHw%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-35YXF33MEFC5X11_C88830.html LCSC]
|-
|C555, C604
|2
|860020472006 / 25PK47MEFC5*11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020472006/5727060 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020472006?qs=0KOYDY2FL297CiYdK70wDg%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-25PK47MEFC5-11_C109370.html LCSC]
|-
|C622
|1
|860020472005 / 35YXF33MEFC5X11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020472005/5727059 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020472005?qs=0KOYDY2FL2%252BaTrqGlTUmIw%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-35YXF33MEFC5X11_C88830.html LCSC]
|-
|C753
|1
|UVZ2E010MED / ESK105M250AE3AA / 400LLE1MEFC6.3X11
|[https://www.digikey.com/en/products/detail/nichicon/UVZ2E010MED/589152 DigiKey] [https://www.mouser.com/ProductDetail/KEMET/ESK105M250AE3AA?qs=9RUIYXQlAdCbzuxqLHd%2Fwg%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-400LLE1MEFC6-3X11_C338204.html LCSC]
|}
=== Neck PCB ===
{| class="wikitable sortable"
|+Capacitors
!RefDes
!Qty
!Compatible Part Number
!Order Links
|-
|C804, C814, C824
|3
|UVZ2E010MED / ECA-2EHG010 / 400LLE1MEFC6.3X11
|[https://www.digikey.com/en/products/detail/nichicon/UVZ2E010MED/589152 Digikey] [https://www.mouser.com/ProductDetail/Panasonic/ECA-2EHG010?qs=0V5HdeXXgg26tIhOXzm84Q%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-400LLE1MEFC6-3X11_C338204.html LCSC]
|-
|C806, C816, C826
|3
|860021373003 / 400CGX2R2MEFC6.3X11
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860021373003/5727118 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860021373003?qs=0KOYDY2FL29DzCND6Y6fNA%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-400CGX2R2MEFC6-3X11_C338202.html LCSC]
|-
|C842, C844, C850
|3
|ESH106M100AE3AA / 100YXJ10M5X11
|[https://www.digikey.com/en/products/detail/kemet/ESH106M100AE3AA/2712520 DigiKey] [https://www.mouser.com/ProductDetail/KEMET/ESH106M100AE3AA?qs=Z46kSA%2FmtFgYg2wMhEjeSg%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-100YXJ10M5X11_C338165.html LCSC]
|-
|C843
|1
|860020372004 / 6MS747MEFC5X7
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860020372004/5727028 DigiKey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860020372004?qs=0KOYDY2FL28if5xRhEUGgw%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-16MS747MEFC5X7_C108854.html LCSC]
|-
|C853
|1
|ESE105M100AC3EA / 400YXA1MEFC6.3X11 
|[https://www.digikey.com/en/products/detail/kemet/ESE105M100AC3EA/13176420 DigiKey] [https://www.mouser.com/ProductDetail/KEMET/ESE105M100AC3EA?qs=9RUIYXQlAdClzKJAOQ1XXg%3D%3D Mouser] [https://www.lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-Leaded_Rubycon-400YXA1MEFC6-3X11_C338206.html LCSC]
|}
''If parts are not available or different selection is preferred, you can use the values in the [[#Original_Parts|Original Parts]] section to perform a parametric search.''
===Kits===
*Digikey BOM: https://www.digikey.com/
==Related Links==
*[https://www.repairfaq.org/REPAIR/F_IBMmon.html IBM 8512, 8513, and 8514 maintenance and repair notes on repairfaq.org]
==References==
<references />
[[Category:WorkNeeded:ReplacementParts]]
[[Category:Computer Monitor]]
[[Category:1980s]]
[[Category:WorkNeeded:OriginalParts]]