Kikusui COS5020 / COS5021 Oscilloscope Instruction & Service Manual (1998) PDF

Description

Kikusui COS5020 / COS5021 Oscilloscope Instruction & Service Manual (1998) PDF DOWNLOAD

📘 Kikusui COS5020 / COS5021 Oscilloscope – Instruction & Service Manual (PDF)

This manual is a handy factory reference for operating, testing, and servicing the Kikusui COS5020 / COS5021 oscilloscopes. It includes the practical “how to use it” section (controls, triggering, sweep, X-Y mode), plus real technician content like circuit descriptions, calibration/adjustment steps, and supporting diagrams/schematics—perfect for repair benches, labs, and electronics troubleshooting.

⭐ Quick Highlights

• Dual-channel, 20 MHz (-3 dB) scope with up to 1 mV/div sensitivity (×5 MAG)

• Fast timebase down to 20 ns/div

• COS5021 adds delayed sweep / B-sweep features

• Built-in calibrator output (square wave) for probe compensation and checks

📑 Table of Contents

1) General

• Description

• Features

2) Specifications

3) Precautions Before Operating the Oscilloscope

• Unpacking the oscilloscope

• Checking the line voltage (selector plug + fuse)

• Operating environments

• CRT intensity precautions

• Withstanding voltages of input terminals

4) Operation Method

• Explanation of front panel

• Explanation of rear panel

• Basic operation

• Dual-channel operation

• ADD operation (CH1+CH2)

• X-Y operation & EXT HOR operation

• Triggering

• Single-sweep operation

• Sweep magnification

• Waveform magnification with delayed sweep (COS5021 only)

• Calibration of probe

5) Circuit Description

• Preamplifiers

• Vertical switching circuit

• Vertical output amplifier

• Trigger generator

• A & B sweep generator

• Horizontal switching circuit

• Horizontal output amplifier

• Z-axis amplifier

• CRT control circuit

• High-voltage regulator (HV generator)

• Power supply circuit

• Calibrator circuit

6) Calibration / Adjustment

• Removing the case

• DC supply voltage checks & adjustments

• CRT circuit adjustments

• Vertical axis adjustments

• Trigger circuit adjustments

• Time base adjustments

• Horizontal axis (X-axis) adjustments

Appendix / Drawings / Parts

• Block diagram

• Circuit schematics (Vertical amplifier / Trigger & sweep / CRT & power supply)

• Parts locations (boards/modules)

• Semiconductor lead configuration

• Replaceable parts list (COS5020 + COS5021)

• Mechanical assembly drawings

🔧 Key Specs Customers Care About (great for SEO)

Vertical System

• Sensitivity: 5 mV/div to 5 V/div (NORM), 1 mV/div to 1 V/div (×5 MAG)

• Bandwidth: DC–20 MHz (NORM), DC–15 MHz (×5 MAG)

• Input impedance: 1 MΩ / ~25 pF

• Max input (CH1/CH2): 400 V (DC + AC peak)

Triggering / Sweep / Display

• Trigger sources: CH1 / CH2 / LINE / EXT

• Trigger modes: AUTO / NORM / SINGLE / LEVEL LOCK

• Timebase: 0.2 µs/div to 0.5 s/div (A sweep), down to 20 ns/div via magnification

• COS5021: delayed sweep / B-sweep functions

Calibrator (Probe Compensation)

• Square wave: ~1 kHz, ~2 Vp-p output (built-in)

Power / Physical

• Power: 100/115/215/230V, 50/60 Hz, ~35 VA

• Weight: ~7.0 kg

• Includes probe accessories (2 probes listed)

📌 File Details

Get the exact factory specs, operating instructions, calibration steps, and schematics you need to keep your COS5020/COS5021 running right. Buy now and download instantly—perfect for bench troubleshooting and repairs.