VT240 Series

This "VT 240 Series Pocket Service Guide" from Digital Equipment Corporation, published in January 1984, is a technical manual designed for service personnel.

It provides comprehensive information for maintaining and repairing the VT 240 series video terminals. Key topics covered include:

• Testing and Troubleshooting: Procedures for self-tests, interpreting error codes, and addressing general problems.
• Removing and Replacing FRUs (Field Replaceable Units): Detailed instructions for replacing components such as the top cover, power supply chassis, terminal controller boards, keyboard, VT240 series monitor, and integral modem.
• Monitor Alignment and Servicing: Specific guidance for aligning and servicing both the monochrome VR201 monitor and the color VR241-A monitor, including adjustments for brightness, contrast, focus, linearity, centering, aspect ratio, and color purity.
• Using Set-Up: Instructions on how to configure the terminal's operating features.

The document also includes appendices with documentation references, exploded view drawings of FRUs, cable information, and physical/functional diagrams of the terminal components.