This service manual contains information to maintain the LeCroy 7242 Series Plugin for the 7200 series Modular Digital Oscilloscope The manual is divided into eight sections as follows: 1. General Information Contains the 7242 description, specifications, and characteristics. 2. Performance Verification Contains the performance tests necessary to verify instrument specifications, including recommended test equipment and test record form. 3. Adjustments / Calibration Contains the necessary procedures to adjust the instrument after servicing. 4. Basic Operation / Block Diagrams Contains operation descriptions and block diagrams for the instrument. 5. Disassembly Contains the disassembly and assembly procedures. 6. Troubleshooting Contains troubleshooting flowcharts to assist in the repair of the instrument. 7. Schematics I Reference Diagrams Contains schematics and component location diagrams. 8. Parts List Contains Replaceable and Full parts lists.