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HP-41 C
Service manual
HP 41C Service Manual
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:
Repair manual
(7 pages)
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Illustrations List
Tables List
General Information
Primary Data Storage Registers
Extended Data Storage Registers
Program Memory
Identification
Specifications
Theory of Operation
Functional Description
Timing Generator
Signal Names
Block Diagram
Address, Status, and Flag Registers
Data Registers
Power Control Logic
Keyboard Interface
Rom
Data Storage
Liquid Crystal Display
Display Driver
Power Supply
System Operation
Input/Output Ports
Initial Condition
Power on Response
Key Entry Response
System Timing
Power off
Disassembly and Reassembly
Case Separation
I/O Assembly Replacement
Display Disassembly and Replacement
Logic PCA Replacement
Case Reassembly
Troubleshooting and Testing
Recommended Tools
Key Assignments for Service Module
Preparation for Troubleshooting
Diagnostic Test
Keyboard Test
Standby Test
Sleep Test
Multiple Summary
Keycode Test
I/O Port Test
ROM Identification
Repair and Test
Test Calculator
Service Clamp
Detailed Diagnostic Test Procedure
CPU Test
Display Test
D/S Test
ROM Test
Character Test
ROM Identification Check
Test Selection/Completion
CPU Test Procedures
Power Supply Troubleshooting Procedure
Auxiliary Tests
Low-Level Detection Test
Battery Test
Contacts on Keyboard PC Board
Contacts at I/O Port
Component Location Diagram for Logic PCA
Schematic Diagram
Logic PCA Replaceable Parts
Service Module
Summary or Service Module Operation
Replaceable Parts
Exploded View
Memory/Application Module Test
Memory Module Identification
Memory Module Diagnostic Test
Module Specifications
Application Module Tests
Memory Module Test
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Table of Contents
Troubleshooting
Troubleshooting and Testing
20
Preparation for troubleshooting
21
Power Supply Troubleshooting Procedure
32
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