Goldstar OS-7020 - Service Manual

G o l d S t a r
M O D E L O S - 7 0 2 0
O S C I L L O S C O P E
S E R V I C E M A N UA L
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Summary

Oscilloscope Specifications

Deflection and Triggering Systems

Specs for vertical/horizontal deflection, sweep rates, and triggering functions.

Preventive Maintenance Procedures

Cleaning Guidelines

Recommended agents and procedures for cleaning the instrument.

Inspection and Calibration Schedule

Measuring Instructions

Probe Setup and Voltage Measurement

Steps for probe phase adjustment and measuring DC/AC voltages.

Frequency and Phase Measurement Methods

Circuit Description

Vertical, Trigger, and Sweep Circuitry

Horizontal, Power, and CRT Drive Circuits

Calibration

Preliminary Control Settings

Specifies initial control settings required before starting calibration.

Electrical Parts List

Input and Vertical Stage Components

Signal Generation and Amplification Parts

Schematic Diagrams

Input and Vertical Circuit Diagrams

Signal Generation and Amplification Diagrams

Power Supply and Wiring Diagrams

Goldstar OS-7020 Specifications

General

Model	OS-7020
Category	Test Equipment
Type	Oscilloscope
Bandwidth	20 MHz
Number of Channels	2
Vertical Sensitivity	5mV/div to 5V/div
Display	CRT
Trigger Modes	Auto
Input Impedance	1 MΩ || 25 pF
Power Supply	50/60 Hz