News: Stay tuned!
New book from The Calculator Store: HP41 Repair: A Beginner's Guide to Repairing your HP41 Calculator. 14.00€ paperback version, 9.99 Kindle version. Only in Amazon
We have been told that the book is not visible in some of the amazon websites worldwide. Here we offer links to all of them:
amazon.com
amazon.co.uk
amazon.de
amazon.fr
amazon.es
Amazon.it
Nuevo Kit de reparación de postes de HP41cN.º de producto: Lower Post Repair KitConjunto de puiezas para la reparación de los postes de abajo de la serie de calculadoras 41c, 41cv y 41cx full nut, incluyendo conextores cebra, recambio de postes y soporte para apoyar las pinzas y proteger el teclado.
Precio anterior
70,00 €
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Muelle para cargador de HP41cN.º de producto: SpringMuelle en acero inoxidable 304 para reemplazar muelles rotos o oxidados en portabaterías de HP41c |
Pieza para reparación de parte trasera de HP41cN.º de producto: brokenback1 Piece for repairing HP41c back cases. This piece is for repair of HP41c back halves, specifically the support of the upper screw heads that is often damaged, and very difficult to repair in a lasting way. |
Nuevo Pieza para reparar postes inferioresN.º de producto: LowpostrepairPieza para reparar los agujeros para tornillos inferiores de la familia HP41c, del tipo full-nut |
Nuevo Pieza para reparar postes superioresN.º de producto: UpperPostRepairPieza para reparar los agujeros para tornillos superiores de la familia HP41c, para modelos tanto half-nut como full nut |
Soporte teclado para reparacionesN.º de producto: keyboard supportPieza necesaria para la reparación de los postes inferiores de la HP41c |
Trasera de HP41C reparadaN.º de producto: HP41CbackParte trasera de HP41C ya reparada, que se puede aplicar en cualquier calculadora cuya parte trasera tenga los soportes de tornillos rotos. |
Reparación card readerN.º de producto: card reader repairReparación de lector de tarjetas según diagnóstico.
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Pestañas card readerN.º de producto: cardreader sidelocks3D printed HP82104A card reader side-locks - set of left and right locks |
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Instructions to repair the upper back case screw head support.
Upper post repair
Broken Lower Screw Post Repair
Under construction
Under construction
If there are black spots in the LCD, the only solution is to change the screen. These are not produced anymore, so you will need to find a donor HP41c.
When the screen does not allow all segments to be seen, it may be one of several faults:
- Bad connections of the lower zebras
- Bad connections of the lightly soldered screen pins
- Bad connection between the LCD and the screen driver
- One of the two screen driving circuits gone bad
We will discuss all cases in the article.
How to get out of the screen these specs or dirt accumulated over so many years.
After a lot of time, we have just found a good solution to repair your scratched HP41C screen. There is an abrasive product used to repair watches' plastic screens, called Poliwatch. You can easily get it from Amazon and other sources.
The method: just apply a little quantity on the scratch, and then rub firmly with a soft cloth. You will get, once cleaned, a bright surface without scratches. Note: after some tests, we have found that the dremel method can overheat the plastic and lead to internal cracks or material deformation. It has to be manual!
Beware: do not try to use this material on crystal - it is so hard that it would not help at all.