HP 7475A Plotter: Difference between revisions

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

Revision as of 13:52, 19 August 2023

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

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.

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.

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)

Capacitors
RefDes	Qty	Compatible Part Number	Order Links
C1	1	EEU-FR1V680B	Digikey
C2	1	UPM1H222MHD	Digikey
C20, C25	2	500D226M025BA2A	Digikey
C31, C32	2	860160674016	Digikey

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

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 ==Replacement Parts==
-===Basic PCB Name===
+===Main Logic Board===
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 |+Capacitors