Finally it is here!! 133 pages of our repair experiences and methods. Thanks also to the help and advices of Ignacio Sánchez, who suggested many of the repair methods and helped testing them.
You can click on the link below:
HP Repair book in amazon
It is also available on all amazon country sites.
Here is the chapter list:
1. The HP41C family of calculators
Serial number and places of production
The HP-IL loop
2. Identify your HP41
C, CV and CX
Full nut and half nut
Tall keys and normal keys
3. Tools and Parts
Tools - Required
Tools – nice to have but not required
Spare Parts – replacement parts
4. Modes of Failure (or typical problems in HP41c Calculators)
Types of failures
5. Opening and Closing the calculator
6. Battery and ports module replacement
7. Zebra replacement
8. Broken lower post repair
Use longer screws.
Cyanoacrylate over the inner part of the post.
Broken post repair
9. Upper Post repair
10. Broken screw head supports
Instructions: first method: back repair piece.
Alternative Method: integral piece.
10. Corroded Circuit Traces
11. Screen Problems
Damaged Screen Protection
12. Damaged Keyboard
13. Calculator Testing
Test with a Service Module (C or CV/CX)
Test without Service module
14. New: CL module installation
15. Peripheral repairs and other items.
Hp 82104A Card Reader
Missing port covers
Appendix 1: The Calculator Store Spare Parts
Appendix 2:HP41C List of parts
Appendix 3: Full-nut circuits
Appendix 4: list of software modules
References and interesting websites.