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 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]])
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===
===Power Supply Failure / Squealing / Clicking===
====Causes====
====Causes====
Line 23: Line 21:
*Consider complete recap.
*Consider complete recap.
*Use low-ESR capacitors at output
*Use low-ESR capacitors at output
=== Monitor Turns Red ===
=== Monitor Turns Red ===
==== Causes ====
==== Causes ====
* Neck PCB capacitor failure
* Neck PCB capacitor failure
*Output / driver transistors on neck PCB (see repairfaq.org link in [[IBM 8512 VGA Monitor, 12"#Related Links|Related Links]])
*Output / driver transistors on neck PCB (see repairfaq.org link in [[IBM 8512 VGA Monitor, 12"#Related Links|Related Links]])
==== Solutions ====
==== Solutions ====
* Recap Neck PCB
* Recap Neck PCB
*Test transistors on 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 (C340, C354, C357) 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==
===Main (9979800001) and Neck (9979800002) PCBs===
===Main (9979800001) and Neck (9979800002) PCBs===
''NOTES:''  
''NOTES:''
 
#All capacitors listed below are through-hole mounted aluminum electrolytics.
#All capacitors listed below are through-hole mounted aluminum electrolytics.
#All capacitances are micro Farads (uF).
#All capacitances are micro Farads (uF).
#Capacitors C100 - C400 are located under the EMF shielding (near RGB pots)
#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)
#Capacitors C400 - C700 are located in the horizontal / vertical control circuitry (middle section of board to flyback)
{| class="wikitable sortable"
{| class="wikitable sortable"
|+Main PCB 9979800001 (rev 04 and 08) - 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  
Line 59: Line 48:
!Notes
!Notes
|-
|-
|C115, C215, C315
|C101, C201, C301
|2
|3
|0.47
|47
|50
|16
|
|
|
|
|
|
|
|BI-POLAR
|-
|-
|C113, C213, C313
|C104, C111, C114, C204, C211, C214, C304, C311, C314
|3
|9
|1
|47
|50
|16
|
|
|
|
Line 95: Line 84:
|
|
|-
|-
|C101, C201, C301
|C113, C213, C313
|3
|3
|47
|1
|16
|50
|
|
|
|
|
|
|
|BI-POLAR
|-
|-
|C104, C111, C114, C204, C211, C214, C304, C311, C314
|C115, C215, C315
|9
|2
|47
|0.47
|16
|50
|
|
|
|
Line 113: Line 102:
|
|
|-
|-
|C350
|C340, C354, C357
|1
| 3
|100
| 470
|16
| 25
|
|
|
|
Line 122: Line 111:
|
|
|-
|-
|C356
|C350
|1
|1
|100
|100
Line 140: Line 129:
|
|
|-
|-
|C340, C354, C357
|C355, C413, C515, C557, C752
| 3
|5
| 470
|10
| 25
|50
|
|
|
|
|
|
|
|C557 not present on rev 04
|-
|-
|C503, C620
|C356
|2
|1
|1
|50
|100
|16
|
|
|
|
|
|
|
|C620 not present on rev 08
|-
|-
|C753
|C401, C516, C556, C601, C602, C751
|1
|6
|1
|4.7
|250
|50
|
|
|
|
Line 167: Line 156:
|
|
|-
|-
|C412
|C405, C414
|1
|2
| 2.2
|100
|50
|25
|
|
|
|
Line 176: Line 165:
|
|
|-
|-
|C401, C516, C556, C601, C602, C751
|C408
 
|1
|6
|33
|4.7
|16
|50
|
|
|
|
Line 186: Line 174:
|
|
|-
|-
|C355, C413, C515, C557, C752
|C412
|5
|1
|10
| 2.2
|50
|50
|
|
|
|
|
|
|C557 not present on rev 04
|
|-
|-
|C537
|C416
|1
|1
|22
|330
|160
|35
|
|
|
|
Line 204: Line 192:
|
|
|-
|-
|C545
|C425
|1
|1
|22
|100
|250
|35
|
|
|
|
Line 213: Line 201:
|
|
|-
|-
|C408
|C428
|1
|1
|33
|470
|16
|35
|
|
|
|
Line 222: Line 210:
|
|
|-
|-
|C622
|C503, C620
|2
|1
|1
|33
|50
|25
|
|
|
|
|
|
|
|C620 not present on rev 08
|-
|-
|C554
|C514
|1
|1
|33
|470
|35
|25
|
|
|
|
Line 240: Line 228:
|
|
|-
|-
|C555, C604
|C534, C609
|2
|2
|47
|220
|25
|16
|
|
|
|
Line 249: Line 237:
|
|
|-
|-
|C405, C414
|C537
|2
|1
|100
|22
|25
|160
|
|
|
|
Line 258: Line 246:
|
|
|-
|-
|C425
|C545
|1
|1
|100
|22
|35
|250
|
|
|
|
Line 267: Line 255:
|
|
|-
|-
|C534, C609
|C550
|2
|1
|220
|1000
|16
|25
|
|
|
|
Line 285: Line 273:
|
|
|-
|-
|C416
|C554
|1
|1
|330
|33
|35
|35
|
|
Line 294: Line 282:
|
|
|-
|-
|C514
|C555, C604
|1
|2
|470
|47
|25
|25
|
|
Line 303: Line 291:
|
|
|-
|-
|C428
|C622
|1
|1
|470
|33
|35
|25
|
|
|
|
Line 312: Line 300:
|
|
|-
|-
|C550
|C753
|1
|1
|1
|1000
|250
|25
|
|
|
|
Line 322: Line 310:
|}
|}
{| class="wikitable sortable"
{| class="wikitable sortable"
|+Neck PCB 9979800002 (rev 05 and 07) - Capacitor [[Capacitor Specifications|Specifications]] and [[Part Footprints|Footprint]] Information
|+Neck PCB 9979800002 (rev 05 and 07) - Capacitor [[Capacitor Specifications|Specifications]] and [[Part Footprints|Footprint]] Information
!RefDes
!RefDes
!Qty
!Qty
Line 330: Line 318:
!Temp
!Temp
!Notes
!Notes
|-
|C853
|1
|1
|100
|
|
|
|-
|-
|C804, C814, C824
|C804, C814, C824
Line 370: Line 350:
|
|
|
|
|-
|C853
|1
|1
|100
|
|
|
|}
==Replacement Parts==
===Main PCB===
{| class="wikitable sortable"
|+Capacitors
!RefDes
!Qty
!Compatible Part Number
!Order Links
|-
|C401, C516, C556, C601, C602, C751
|6
|860020672008
|[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]
|-
|C405, C414
|2
|860020473008
|[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]
|-
|C408
|1
|860020372003
|[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]
|-
|C412
|1
|860020672006
|[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]
|-
|C416
|1
|860020575013
|[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]
|-
|C425
|1
|860020573008
|[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]
|-
|C428
|1
|860020575014
|[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]
|-
|C503, C620
|2
|860020672005
|[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]
|-
|C514
|1
|860020474014
|[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]
|-
|C534, C609
|2
|860020373010
|[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]
|-
|C537
|1
|UVR2C220MPD
|[https://www.digikey.com/en/products/detail/nichicon/UVR2C220MPD/588903 DigiKey] [https://www.mouser.com/ProductDetail/Nichicon/UVR2C220MPD?qs=3PWENkzFzi66ZIZ0ODIU8w%3D%3D Mouser]
|-
|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]
|-
|C550
|1
|860020475018
|[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]
|-
|C552
|1
|860020474012
|[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]
|-
|C554
|1
|860020572005
|[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]
|-
|C555, C604
|2
|860020472006
|[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]
|-
|C622
|1
|860020472005
|[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]
|-
|C753
|1
|UVZ2E010MED / ESK105M250AE3AA
|[https://www.digikey.com/en/products/detail/nichicon/UVZ2E010MED/589152 DigiKey] [https://www.mouser.com/ProductDetail/KEMET/ESK105M250AE3AA?qs=9RUIYXQlAdCbzuxqLHd%2Fwg%3D%3D Mouser]
|}
|}


==Replacement Parts==
=== Neck PCB ===
===Basic PCB Name===
{| class="wikitable sortable"
{| class="wikitable sortable"
|+Capacitors
|+Capacitors
Line 381: Line 467:
!Order Links
!Order Links
|-
|-
|
|C804, C814, C824
|
|3
|
|UVZ2E010MED / ECA-2EHG010
|[https://www.digikey.com/ Digikey]
|[https://www.digikey.com/en/products/detail/nichicon/UVZ2E010MED/589152 Digikey] [https://www.mouser.com/ProductDetail/Panasonic/ECA-2EHG010?qs=0V5HdeXXgg26tIhOXzm84Q%3D%3D Mouser]
|-
|C806, C816, C826
|3
|860021373003
|[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]
|-
|C842, C844, C850
|3
|ESH106M100AE3AA
|[https://www.digikey.com/en/products/detail/kemet/ESH106M100AE3AA/2712520 DigiKey] [https://www.mouser.com/ProductDetail/KEMET/ESH106M100AE3AA?qs=Z46kSA%2FmtFgYg2wMhEjeSg%3D%3D Mouser]
|-
|C843
|1
|860020372004
|[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]
|-
|C853
|1
|ESE105M100AC3EA
|[https://www.digikey.com/en/products/detail/kemet/ESE105M100AC3EA/13176420 DigiKey] [https://www.mouser.com/ProductDetail/KEMET/ESE105M100AC3EA?qs=9RUIYXQlAdClzKJAOQ1XXg%3D%3D Mouser]
|}
|}
''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 />

Revision as of 17:20, 28 January 2023

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 16 BI-POLAR
C104, C111, C114, C204, C211, C214, C304, C311, C314 9 47 16
C106, C206, C306 3 4.7 25 BI-POLAR
C108, C208, C308, C352 4 4.7 50
C113, C213, C313 3 1 50
C115, C215, C315 2 0.47 50
C340, C354, C357 3 470 25
C350 1 100 16
C353 1 100 25
C355, C413, C515, C557, C752 5 10 50 C557 not present on rev 04
C356 1 100 16
C401, C516, C556, C601, C602, C751 6 4.7 50
C405, C414 2 100 25
C408 1 33 16
C412 1 2.2 50
C416 1 330 35
C425 1 100 35
C428 1 470 35
C503, C620 2 1 50 C620 not present on rev 08
C514 1 470 25
C534, C609 2 220 16
C537 1 22 160
C545 1 22 250
C550 1 1000 25
C552 1 220 25
C554 1 33 35
C555, C604 2 47 25
C622 1 33 25
C753 1 1 250
Neck PCB 9979800002 (rev 05 and 07) - Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Diameter / Size Temp Notes
C804, C814, C824 3 1 250
C806, C816, C826 3 2.2 315
C842, C844, C850 3 10 100
C843 1 47 16
C853 1 1 100

Replacement Parts

Main PCB

Capacitors
RefDes Qty Compatible Part Number Order Links
C401, C516, C556, C601, C602, C751 6 860020672008 Digikey Mouser
C405, C414 2 860020473008 DigiKey Mouser
C408 1 860020372003 DigiKey Mouser
C412 1 860020672006 DigiKey Mouser
C416 1 860020575013 DigiKey Mouser
C425 1 860020573008 DigiKey Mouser
C428 1 860020575014 DigiKey Mouser
C503, C620 2 860020672005 DigiKeyMouser
C514 1 860020474014 DigiKey Mouser
C534, C609 2 860020373010 DigiKey Mouser
C537 1 UVR2C220MPD DigiKey Mouser
C545 1 UVY2E220MPD1TD / 250BXC22MEFC10X16 DigiKey Mouser
C550 1 860020475018 DigiKey Mouser
C552 1 860020474012 DigiKey Mouser
C554 1 860020572005 DigiKey Mouser
C555, C604 2 860020472006 DigiKey Mouser
C622 1 860020472005 DigiKey Mouser
C753 1 UVZ2E010MED / ESK105M250AE3AA DigiKey Mouser

Neck PCB

Capacitors
RefDes Qty Compatible Part Number Order Links
C804, C814, C824 3 UVZ2E010MED / ECA-2EHG010 Digikey Mouser
C806, C816, C826 3 860021373003 DigiKey Mouser
C842, C844, C850 3 ESH106M100AE3AA DigiKey Mouser
C843 1 860020372004 DigiKey Mouser
C853 1 ESE105M100AC3EA DigiKey Mouser

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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