HP 7475A Plotter: Difference between revisions

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(Created page with "{{WikipediaInfoAlt|Device}} {{DeviceAlerts}} {{InfoboxDevice |Title = New Device |Picture =HP-7475-plotter.jpg |Mounting Technology = Through Hole |Capacitor Types = Aluminum Electrolytic, Tantalum, Ceramic |Leak Risk = Medium |Batteries = None |Destructive Entry = No }} HP plotter with HP-IB (GP-IB) interface. Hold 6 pens in carousel. ==Known Issues== ===Fish Smell=== ====Causes==== *Leaking capacitor <gallery> File:Hp-7475-logicboard-c2-leak.jpg|Leaking cap visible on...")
 
 
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{{WikipediaInfoAlt|Device}}
{{DeviceAlerts}}
{{DeviceAlerts}}
{{InfoboxDevice
{{InfoboxDevice
|Title = New Device
|Picture =HP-7475-plotter.jpg  
|Picture =HP-7475-plotter.jpg  
|Mounting Technology = Through Hole
|Mounting Technology = Through Hole
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File:Sprague-capacitor-corossion.jpg|Sprague brand capacitor that has leaked and formed a powder moving up into the jacket of the capacitor.
File:Sprague-capacitor-corossion.jpg|Sprague brand capacitor that has leaked and formed a powder moving up into the jacket of the capacitor.
</gallery>
</gallery>
====Solutions====
====Solutions====
*Clean PCB and replace cap
*Clean PCB and replace cap
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|C2
|C2
|1
|1
|22,000 µF
|2,200 µF
|40V
|40V
|Through Hole (3 pin)
|Through Hole (3 pin)
Line 73: Line 70:
|C24
|C24
|1
|1
|6800 µF
|6,800 µF
|25V
|25V
|Through Hole (3 pin)
|Through Hole (3 pin)
Line 111: Line 108:
|}
|}
==Replacement Parts==
==Replacement Parts==
===Basic PCB Name===
===Main Logic Board===
{| class="wikitable sortable"
{| class="wikitable sortable"
|+Capacitors
|+Capacitors
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!Order Links
!Order Links
|-
|-
|
|C1
|
|1
|
|EEU-FR1V680B
|[https://www.digikey.com/ Digikey]
|[https://www.digikey.com/en/products/detail/panasonic-electronic-components/EEU-FR1V680B/2504123?s=N4IgjCBcoKwAwA4qgMZQGYEMA2BnApgDQgD2UA2uAMwDsALBALrEAOALlCAMpsBOAlgDsA5iAC%2BxAExw6ATmQh2nAKqD%2BbAPLoAsvky4Arr3whiBzgFaAYqZABbTAA9OANiTE7Q10gkhpNeWgQNEgsPCJSChAqGAACADUQZkUOSBBVdS1dfSMTXwBaSQUQvgMIskhKGCSxWqA Digikey] [https://www.mouser.com/ProductDetail/Panasonic/EEU-FR1V680B?qs=n1SRcuzDZT1Q1sxcL%2FQkuw%3D%3D Mouser]
|-
|C2
|1
|UPM1H222MHD
|[https://www.digikey.com/en/products/detail/nichicon/UPM1H222MHD/2599633 Digikey] [https://www.mouser.com/ProductDetail/Nichicon/UPM1H222MHD?qs=t%252B%252BEoj6fgcd2bKlIB3XjYw%3D%3D Mouser]
|-
|C20, C25
|2
|500D226M025BA2A
|[https://www.digikey.com/en/products/detail/vishay-sprague/500D226M025BA2A/5610405 Digikey] [https://www.mouser.com/ProductDetail/Vishay-Sprague/500D226M025BA2A?qs=RfZoDPslYDRUw%252B3KxoHLyQ%3D%3D Mouser]
|-
|C24
|1
|25PK6800MEFC16X31.5
|[https://www.digikey.com/en/products/detail/rubycon/25PK6800MEFC16X31-5/3134177 DigiKey] [https://www.mouser.com/ProductDetail/Rubycon/25PK6800MEFC16X31.5?qs=T3oQrply3y8rd0sIOTQqeQ%3D%3D Mouser]
|-
|C31, C32
|2
|860160674016
|[https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/860160674016/5727824 Digikey] [https://www.mouser.com/ProductDetail/Wurth-Elektronik/860160674016?qs=0KOYDY2FL2%252BLy32GPJkj0A%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===
*Digikey BOM: https://www.digikey.com/
==Related Links==
*[https://www.youtube.com Videos or other things that might be helpful to check out]
==References==
==References==
<references />
<references />
[[Category:WorkNeeded:General]]
[[Category:Computer Plotter]]
[[Category:WorkNeeded:OriginalParts]]
[[Category:1980s]]
[[Category:WorkNeeded:ReplacementParts]]

Latest revision as of 20:20, 19 February 2024

HP 7475A Plotter
Preliminary Information
Leak Risk Medium
Batteries None
Mounting Technology Through Hole
Capacitor Types Aluminum Electrolytic, Tantalum, Ceramic
Destructive Entry No

HP plotter with HP-IB (GP-IB) interface. Hold 6 pens in carousel.

Known Issues

Fish Smell

Causes

  • Leaking capacitor
  • Leaking cap visible on logic board with electrolyte seeping up the jacket

    Leaking cap visible on logic board with electrolyte seeping up the jacket

  • Sprague brand capacitor that has leaked and formed a powder moving up into the jacket of the capacitor.

    Sprague brand capacitor that has leaked and formed a powder moving up into the jacket of the capacitor.

Solutions

  • Clean PCB and replace cap

Disassembly Notes

Screws in rear from top removes plastic shell.

Two screws going through plot mechanism and PCB hold both in. HP-IB port screws must also be removed to remove PCB.

Original Parts

Main logic board

07475-60102

Capacitor Specifications and Footprint Information
RefDes Qty Capacitance Voltage Mount Diameter/Size Height Lead Spacing Temp Type Brand Series
C1 1 68 µF 35V Through Hole 10mm 20mm 5mm -55-105 °C Aluminum Electrolytic Nippon Chemi-Con CERX
C2 1 2,200 µF 40V Through Hole (3 pin) 25mm 67mm 9.5mm Aluminum Electrolytic Sprague 674D
C24 1 6,800 µF 25V Through Hole (3 pin) 25mm 39mm 12mm 85°C Aluminum Electrolytic Nippon Chemi-Con SM
C20, C25 2 22 µF 25V Through Hole Axial 6mm 13mm 20mm 85°C Aluminum Electrolytic Nichicon H8333 ?
C31, C32 2 47 µF 50V Through Hole 8mm 12mm 3.5mm 85°C Aluminum Electrolytic Nichicon SE (M)

Replacement Parts

Main Logic Board

Capacitors
RefDes Qty Compatible Part Number Order Links
C1 1 EEU-FR1V680B Digikey Mouser
C2 1 UPM1H222MHD Digikey Mouser
C20, C25 2 500D226M025BA2A Digikey Mouser
C24 1 25PK6800MEFC16X31.5 DigiKey Mouser
C31, C32 2 860160674016 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

References

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