HP TM 11-6625-2779-14&P manual Circuit Diagrams, Functional Block Diagram, Schematic Diagrams

Model 3555B	Section VII
	SECTION VII
	CIRCUIT DIAGRAMS
7-1. INTRODUCTION.	should be used in conjunction with the troubleshooting
	procedure described in Section V.

7-2. This section of the Manual contains circuit diagrams for the Model 3555B Transmission and Noise Measuring Set. The functional block diagram (Figure 7-

1)contains signal levels to assist in troubleshooting. The schematic diagrams (Figures 7-2through 7-5)show dc voltage levels which should also aid in locating faulty components.

7-3. FUNCTIONAL BLOCK DIAGRAM.

7-4. The functional block diagram (Figure 7-1) of the 3555B serves the dual purpose of showing how various circuits are arranged to form the set and at the same time gives voltages and adjustments for use in troubleshooting the set. This functional block diagram

7-5. SCHEMATIC DIAGRAMS.

7-6. The schematic diagrams (Figures 7-2through 7-

5)contained in this section show the detailed circuits in the Model 3555B. Components marked with an asterisk are those that are critical in value. The value of these components may vary slightly from one set to another due to variations in transistor Beta etc, and the values shown on the schematic are average.

7-7. Voltage levels have been included on the schematics which should greatly assist in

troubleshooting the set. When measuring these voltages a high input impedance voltmeter (1 megohm or greater) should be used to prevent circuit loading.

REFERENCE DESIGNATIONS

7-1