Reviving Vintage NCR Computers: Testing, Assembly, and More!
Table of Contents:
- Introduction
- Cleaning and Preparation
- Cleaning the Computers
- testing the CPU Cards
- Testing the Backplane Boards
- Power Supply Testing
- Checking the Power Rails
- Troubleshooting the Power Supply
- Building the Computers
- Assembling the Cabinets
- Installing the CPU Cards
- Connecting the Keyboard and Postcard
- Testing the Computers
- Final Thoughts and Next Steps
Introduction
In this episode, we continue our exploration of two vintage computers from NCR and DDE. If you haven't already, make sure to check out episode one for a detailed overview of these computers and the cleaning process. In this episode, we will focus on testing the CPU cards and backplane boards, as well as checking the power supply. Our goal is to bring both computers back to life and ensure their components are functioning properly.
Cleaning and Preparation
Before we dive into testing the various components, let's review the cleaning process we conducted in episode one. We thoroughly cleaned both computers, ensuring that they were free from Dust and debris. This step is crucial to prevent any potential damage caused by dirt or corrosion. Additionally, we explained the importance of using the correct PLU keyboard for testing, which has since arrived.
Testing the CPU Cards
With the CPUs now cleaned, it's time to test their functionality. We will be using a bootable CPU card and a VGA card to see if all three of the CPU cards and backplane boards are working. It's important to note that the person who gave us these computers claimed that none of them were functioning. However, we see this as a challenge and an opportunity to troubleshoot and potentially fix any issues that arise.
Testing the Backplane Boards
In addition to testing the CPU cards, we will also test the backplane boards. These boards play a crucial role in connecting the various components of the computer, so it's essential to ensure their proper functioning. By testing both the CPU cards and backplane boards, we can narrow down any potential issues and determine the best Course of action for further troubleshooting.
Power Supply Testing
Next, we turn our attention to the power supply. We need to check the power rails to ensure they are providing the necessary voltage for the computer's components to function correctly. We will use a voltmeter to measure the voltage of each rail, including the +5V, -12V, and +12V rails. Any abnormalities or inconsistencies in these readings will give us valuable insight into the power supply's condition.
Checking the Power Rails
We start by measuring the voltage of each power rail using a voltmeter. The +5V, -12V, and +12V rails are crucial for the computer's operation, so it's essential to ensure they are providing the correct voltage. By comparing our readings to the expected values, we can identify any potential issues with the power supply.
Troubleshooting the Power Supply
If we encounter any abnormalities during the power supply testing, we will need to troubleshoot the potential causes. This may involve opening up the power supply, inspecting its components, and looking for any signs of damage or malfunction. By doing so, we can pinpoint the source of the problem and determine the necessary repairs or replacements.
Building the Computers
Assuming everything checks out during the testing phase, we can now proceed to build the computers. This involves assembling the cabinets, installing the CPU cards, connecting the keyboard and postcard, and ensuring all components are properly integrated. We want to create a functional and operational computer system that matches the original specifications and design.
Assembling the Cabinets
First, we will carefully assemble the cabinets, ensuring all components fit snugly and securely. This step requires attention to detail and may involve tightening screws, aligning panels, and connecting any necessary cables or connectors. By following a careful and systematic approach, we can ensure the cabinets are sturdy and ready for the internal components.
Installing the CPU Cards
Once the cabinets are assembled, we can install the CPU cards into their respective slots. An essential aspect of this process is matching the correct CPU card version with each computer. By doing so, we ensure compatibility and optimize the performance of the system. We will also pay close attention to the connections and make sure everything is properly seated.
Connecting the Keyboard and Postcard
To interact with the computers, we need to connect the keyboard and postcard. The keyboard provides input for commands and navigation, while the postcard allows us to monitor the system's performance and voltage levels. We will double-check all connections to ensure they are secure and aligned correctly. It's crucial to have these components properly connected for a successful testing phase.
Testing the Computers
With all the components in place, it's time to power on the computers and observe their performance. We will carefully monitor the startup process, checking for any error codes or abnormal behavior. The postcard will provide valuable information about voltage levels and potential issues. Our goal is to see the computers boot up successfully and reach a stable and operational state.
Final Thoughts and Next Steps
In conclusion, this episode showcased the progress we made in testing and preparing the vintage computers for operation. We successfully tested the CPU cards, backplane boards, and power supply, ensuring that all crucial components are functioning correctly. Our next steps involve building the computers in their respective cabinets, continuing with further testing, and exploring additional functionalities such as floppy disk drives.
Overall, this project has been a challenging yet rewarding journey. We are excited to see these vintage computers come back to life and contribute to the preservation of computing history. Stay tuned for episode three, where we will delve deeper into the power supply and continue our exploration of these fascinating machines.
Resources:
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Highlights:
- Successfully tested the CPU cards and backplane boards
- Checked the power supply and measured power rail voltages
- Assembled the computer cabinets and installed the components
- Connected the keyboard and postcard for system interaction
- Monitored the startup process for any errors or abnormal behavior
- Prepared for further testing and explored additional functionalities
FAQ
Q: How did you clean the computers?
A: We thoroughly cleaned the computers to remove dust and debris, ensuring optimal performance and longevity.
Q: What were the issues with the power supply?
A: The power supply had shorted -12V and +12V rails, which were identified and resolved during the testing phase.
Q: How did you ensure compatibility between the CPU cards and computers?
A: We matched the correct CPU card version with each computer to ensure compatibility and optimal performance.
Q: What are the next steps in the project?
A: The next steps involve building the computers in their cabinets, continuing with further testing, and exploring additional functionalities such as floppy disk drives.
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