IBM 8512 VGA Monitor, 12": Difference between revisions

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IBM's first generation VGA display released with the IBM PS/2 computer line.
IBM's first generation VGA display released with the IBM PS/2 computer line.
==Known Issues==
==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 not generally a sign of failing components. There are several known maintenance issues which are detailed in the link.
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===
===Symptom or Problem Encountered===
====Causes====
====Causes====
*Failed power supply, monitor would intermittently turn pink.
*Blown filter capacitors (line or transformer side)
====Solutions====
====Solutions====
*Replace capacitors throughout power supply, main PCB, and neck board. Inspect carbon film resistors in area of flyback transformer for burn marks / shell damage
*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==
==Disassembly Notes==
When replacing caps located under the EMF shielding, be careful to note capacitor heights for the taller capacitors if the EMF shielding is to be retained. Experience suggests EMF shields may not be necessary for reliable operation - YMMV.  
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==
==Original Parts==
===Basic PCB Name===
===Main (9979800001) and Neck (9979800002) PCBs===
Main PCB: 9979800001 rev. 04 and 08
''NOTES:''
 
#All capacitors listed below are through-hole mounted aluminum electrolytics.
Neck Board: 9979800002 rev 05 and 07
#All capacitances are micro Farads (uF).
 
#Capacitors C100 - C400 are located under the EMF shielding (near RGB pots)
Power Supply:  
#Capacitors C400 - C700 are located in the horizontal / vertical control circuitry (middle section of board to flyback)
 
''NOTE:  All capacitors listed below are through hole mounted aluminum electrolytics. All capacitances are micro Farads (uF).''
 
{| class="wikitable sortable"
{| class="wikitable sortable"
|+Capacitor [[Capacitor Specifications|Specifications]] and [[Part Footprints|Footprint]] Information
|+Main PCB 9979800001 (rev 04 and 08) - Capacitor [[Capacitor Specifications|Specifications]] and [[Part Footprints|Footprint]] Information
!RefDes
!RefDes
!Qty
!Qty  
!Capacitance
!Capacitance
!Voltage
!Voltage
!Diameter/Size
!Diameter/Size
!Temp
!Temp
!Brand
!Series
!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
|C115, C215, C315
|2
|2
|0.47
|0.47 μF
|50
|50 V
|
|
|
|
Line 55: Line 102:
|
|
|-
|-
|C113, C213, C313, C503, C620*
|C340, C354, C357
|5
| 3
|1
| 470 μF
|50
| 25 V
|
|
|
|
Line 64: Line 111:
|
|
|-
|-
|C853
|C350
|1
|1
|1
|100 μF
|100
|16 V
|
|
|
|
Line 73: Line 120:
|
|
|-
|-
|C753, C804, C814, C824
|C353
|4
|1
|1
|250
|100 μF
|25 V
|
|
|
|
|
|-
|C355, C413, C515, C557, C752
|5
|10 μF
|50 V
|
|
|
|
|
|
|C557 not present on rev 04
|-
|-
|C412
|C356
|1
|1
|2.2
|100 μF
|50
|16 V
|
|
|
|
Line 91: Line 147:
|
|
|-
|-
|C806, C816, C826
|C401, C516, C556, C601, C602, C751
|3
|6
|2.2
|4.7 μF
|315
|50 V
|
|
|
|
Line 100: Line 156:
|
|
|-
|-
|C106, C206, C306
|C405, C414
|3
|2
|4.7
|100 μF
|25
|25 V
|
|
|
|
Line 109: Line 165:
|
|
|-
|-
|C108, C208, C308, C352, C401,
|C408
C516, C556, C601, C602, C751
|1
 
|33 μF
|10
|16 V
|4.7
|50
|
|
|
|
Line 120: Line 174:
|
|
|-
|-
|C412
|1
| 2.2 μF
|50 V
|
|
|
|
|
|
|
|
|-
|C416
|1
|330 μF
|35 V
|
|
|
|
Line 129: Line 192:
|
|
|-
|-
|C425
|1
|100 μF
|35 V
|
|
|
|
|
|
|
|
|-
|C428
|1
|470 μF
|35 V
|
|
|
|
Line 138: Line 210:
|
|
|-
|-
|C503, C620
|2
|1 μF
|50 V
|
|
|
|
|
|
|
|C620 not present on rev 08
|-
|C514
|1
|470 μF
|25 V
|
|
|
|
Line 147: Line 228:
|
|
|-
|-
|C534, C609
|2
|220 μF
|16 V
|
|
|
|
|
|
|
|
|-
|C537
|1
|22 μF
|160 V
|
|
|
|
Line 156: Line 246:
|
|
|-
|-
|C545
|1
|22 μF
|250 V
|
|
|
|
|
|
|
|
|-
|C550
|1
|1000 μF
|25 V
|
|
|
|
Line 165: Line 264:
|
|
|-
|-
|C552
|1
|220 μF
|25 V
|
|
|
|
|
|
|
|
|-
|C554
|1
|33 μF
|35 V
|
|
|
|
Line 174: Line 282:
|
|
|-
|-
|C555, C604
|2
|47 μF
|25 V
|
|
|
|
|
|
|
|
|-
|C622
|1
|33 μF
|25 V
|
|
|
|
Line 183: Line 300:
|
|
|-
|-
|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
|
|
|
|
|
|
|}
|}
<nowiki>*</nowiki> C620 is not present on rev. 08
<nowiki>**</nowiki> C557 is notpresent on rev. 04
==Replacement Parts==
==Replacement Parts==
===Basic PCB Name===
===Main PCB===
Note: Capacitors C100-C400 have not been measured to ensure the replacements fit within the EMF shield
{| class="wikitable sortable"
{| class="wikitable sortable"
|+Capacitors
|+Capacitors
Line 214: Line 369:
!Order Links
!Order Links
|-
|-
|
|C101, C201, C301
|
|3
|
|ECE-A1EN470U / UES1C470MPM
|[https://www.digikey.com/ Digikey]
|[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.''
''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===
===Kits===
*Digikey BOM: https://www.digikey.com/
*Digikey BOM: https://www.digikey.com/
==Related Links==
==Related Links==
*[https://www.repairfaq.org/REPAIR/F_IBMmon.html IBM 8512, 8513, and 8514 maintenance and repair notes on repairfaq.org]
*[https://www.repairfaq.org/REPAIR/F_IBMmon.html IBM 8512, 8513, and 8514 maintenance and repair notes on repairfaq.org]
==References==
==References==
<references />
<references />
Line 233: Line 547:
[[Category:Computer Monitor]]
[[Category:Computer Monitor]]
[[Category:1980s]]
[[Category:1980s]]
[[Category:WorkNeeded:OriginalParts]]
[[Category:IBM]]
[[Category:CRT]]

Latest revision as of 01:56, 21 January 2024

This device is in the WorkNeeded:OriginalParts category because it was flagged as missing information on the original parts. It may have replacement parts listed but those cannot be assumed to be identical to the originals. If you have a list of the original parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables
This device is in the WorkNeeded:ReplacementParts category because it was flagged as missing information on replacement parts. If it has the original parts listed you may be able to search for replacements using the parametric searches available from parts distributors. If you have or make a list of replacement parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables
IBM 8512 VGA Monitor
Preliminary Information
Release Year 1987
Leak Risk Medium
Batteries None
Mounting Technology Through Hole
Capacitor Types Aluminum Electrolytic, Tantalum, Ceramic, Polymer
Destructive Entry No
CRT Guides
General Information · Repair Cautions

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 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:

  1. All capacitors listed below are through-hole mounted aluminum electrolytics.
  2. All capacitances are micro Farads (uF).
  3. Capacitors C100 - C400 are located under the EMF shielding (near RGB pots)
  4. Capacitors C400 - C700 are located in the horizontal / vertical control circuitry (middle section of board to flyback)
Main PCB 9979800001 (rev 04 and 08) - Capacitor Specifications and 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
Neck PCB 9979800002 (rev 05 and 07) - Capacitor Specifications and 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

Capacitors
RefDes Qty Compatible Part Number Order Links
C101, C201, C301 3 ECE-A1EN470U / UES1C470MPM DigiKey Mouser LCSC
C104, C111, C114, C204, C211, C214, C304, C311, C314 9 860020372004 / 25PK47MEFC5*11 DigiKey Mouser LCSC
C106, C206, C306 3 UVP1V4R7MDD DigiKey Mouser
C108, C208, C308, C352 4 860020672008 / 50PK4R7MEFC5*11 DigiKey Mouser LCSC
C113, C213, C313 3 860020672005 / 50YXJ1M5X11 DigiKey Mouser LCSC
C115, C215, C315 2 860020672004 / 50MH50R47MEFCT54X5 DigiKey Mouser LCSC
C350, C356 2 860010372006 / 25PX100MEFC5X11 DigiKey Mouser LCSC
C353 1 860020473008 / 25PX100MEFC5X11 DigiKey Mouser LCSC
C355, C413, C515, C557, C752 5 860020672010 / 50PK10MEFC5X11 DigiKey Mouser LCSC
C401, C516, C556, C601, C602, C751 6 860020672008 / 50PK4R7MEFC5*11 Digikey Mouser LCSC
C405, C414 2 860020473008 / 25PX100MEFC5X11 DigiKey Mouser LCSC
C408 1 860020372003 / 35YXF33MEFC5X11 DigiKey Mouser LCSC
C412 1 860020672006 / 50YXF2R2MEFC5X11 DigiKey Mouser LCSC
C416 1 860020575013 / 35ZLH330MEFCT810X12.5 DigiKey Mouser LCSC
C425 1 860020573008 / 35PK100MEFC6.3*11 DigiKey Mouser LCSC
C428 1 860020575014 / 35PX470MEFC10X12.5 DigiKey Mouser LCSC
C503, C620 2 860020672005 / 50YXJ1M5X11 DigiKeyMouser LCSC
C514 1 860020474014 / 25PX470MEFC8X11.5 DigiKey Mouser LCSC
C534, C609 2 860020373010 / 16PX220MEFC6.3*11 DigiKey Mouser LCSC
C537 1 UVR2C220MPD / 250BXC22MEFC10X16 DigiKey Mouser LCSC
C545 1 UVY2E220MPD1TD / 250BXC22MEFC10X16 DigiKey Mouser LCSC
C550 1 860020475018 / 25PK1000MEFC10*16 DigiKey Mouser LCSC
C552 1 860020474012 / 25PX220MEFC6.3X11 DigiKey Mouser LCSC
C554 1 860020572005 / 35YXF33MEFC5X11 DigiKey Mouser LCSC
C555, C604 2 860020472006 / 25PK47MEFC5*11 DigiKey Mouser LCSC
C622 1 860020472005 / 35YXF33MEFC5X11 DigiKey Mouser LCSC
C753 1 UVZ2E010MED / ESK105M250AE3AA / 400LLE1MEFC6.3X11 DigiKey Mouser LCSC

Neck PCB

Capacitors
RefDes Qty Compatible Part Number Order Links
C804, C814, C824 3 UVZ2E010MED / ECA-2EHG010 / 400LLE1MEFC6.3X11 Digikey Mouser LCSC
C806, C816, C826 3 860021373003 / 400CGX2R2MEFC6.3X11 DigiKey Mouser LCSC
C842, C844, C850 3 ESH106M100AE3AA / 100YXJ10M5X11 DigiKey Mouser LCSC
C843 1 860020372004 / 6MS747MEFC5X7 DigiKey Mouser LCSC
C853 1 ESE105M100AC3EA / 400YXA1MEFC6.3X11 DigiKey Mouser LCSC

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

Related Links

References

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