Hickok-220-operation-and-service MANUAL – Service manual (PDF)

Brand: Hickok-220-operation-and-service
Model: MANUAL
Type: service manual
File size: 1.7 MB

Manual Overview

The Hickok Model 220 Semiconductor Analyzer is a solid-state tester designed for in-circuit and out-of-circuit testing of semiconductors. It features a bright LED display for quick GOOD/BAD indication and automatic lead identification, eliminating the need for data sheets. The device can measure the beta of transistors, transconductance of FETs, and leakage of diodes or transistors. Calibration and maintenance are covered in Section 3 of the manual, with specific instructions for beta calibration and parts location diagrams provided for main and Go-No-Go PC board assemblies. Troubleshooting involves using the GOOD/BAD testing operation, where the device automatically determines the condition and type of the semiconductor. The tester cycles through approximately every 2 to 3 seconds, providing results at the end of each cycle. For parameter operation, the beta of a transistor is measured by connecting it to the test socket or banana jacks, with the device type and lead configuration automatically identified. The manual emphasizes ensuring no circuit voltages are present during in-circuit measurements to prevent damage to the equipment.