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Kortek KTN-1401 User Manual

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SERVICE MANUAL
KTN-2001 / KTN-1401
Rev. No. : A
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Kortek KTN-1401 Specifications

General IconGeneral
BrandKortek
ModelKTN-1401
CategoryMonitor
LanguageEnglish

Summary

Safety Precautions

General Safety Procedures

Essential safety guidelines to follow before and during monitor servicing.

Fire and Shock Hazard Prevention

Specific warnings and measures to mitigate fire and electrical shock risks.

X-Radiation Safety Measures

Precautions related to potential X-ray emissions and high voltage circuits.

Additional Servicing Guidelines

Further procedural precautions for component replacement and overall safe servicing practices.

Product Specifications

KTN-2001 Technical Details

Comprehensive specifications for the KTN-2001 model, including electrical and environmental parameters.

KTN-1401 Technical Details

Comprehensive specifications for the KTN-1401 model, including electrical and environmental parameters.

Printed Circuit Board (PCB) Dimensions

Main PCB Layout and Components

Diagram illustrating the physical layout and component placement on the main PCB.

Socket PCB and Signal Cable Connector

Layout of the socket PCB and pinout description for the signal cable connector.

Signal Timing Charts

Horizontal and Vertical Timing Parameters

Diagram and table detailing signal timing parameters for horizontal and vertical synchronization.

Operating Instructions and Adjustments

Control PCB Functionality Overview

Overview of control PCB components and their functions, aiding in operation.

Adjustment Control Procedures

Step-by-step guide for various adjustment controls, including orientation and warm-up time.

Display Control Adjustment Details

Specific instructions for adjusting display parameters like H-SIZE, V-SIZE, H-POSI, and V-POSI.

Block Diagram

Monitor System Functional Blocks

High-level block diagram illustrating the main functional sections of the monitor.

Theory of Operation

Monitor Block Diagram Explanation

Explanation of the overall monitor block diagram and signal flow.

Video Drive Section Circuitry

Detailed schematic and explanation of the video drive section's electronic components.

Video Output Amplifier and Bias Circuit

Description of the video output amplifier and bias circuit, including component functions.

SMPS Circuit Operation and Components

Explanation of the Switched-Mode Power Supply (SMPS) circuit and its operational principles.

Horizontal Processor Circuitry

Details on the horizontal processor circuit, focusing on the TDA2595 IC and its functions.

Vertical Output Circuit Operation

Explanation of the vertical output circuit, TDA1675 IC, and deflection yoke control.

Horizontal Drive and Output Circuit

Description of the horizontal drive and output stages, including FBT and deflection components.

G1 and Brightness Control Circuit

Explanation of the G1 control and brightness adjustment, including blanking and contrast.

Sync Control Circuit Functionality

Details on the sync control circuit and its role in maintaining output stability.

Adjustment Methods

B+ Voltage and Screen Adjustments

Procedures for adjusting B+ voltage and screen voltage using specific terminals and conditions.

High Voltage and Contrast Adjustments

Methods for adjusting high voltage and contrast by controlling brightness and input voltage.

Raster Position and Coordinate Checks

Steps for adjusting horizontal raster position and performing coordinate value checks.

Other VR Adjustments and HV Regulation

Guidance on other VR adjustments and high voltage regulation checks for optimal performance.

Troubleshooting Guide

No Power Troubleshooting

Flowchart to diagnose and resolve power-related issues in the monitor.

No Video Troubleshooting

Flowchart to diagnose and resolve issues when the monitor displays no video.

Sync Signal Troubleshooting

Flowchart to diagnose and resolve problems related to the sync signal.

Vertical Deflection Troubleshooting

Flowchart to diagnose and resolve problems concerning the vertical deflection system.

Horizontal Deflection Troubleshooting

Flowchart to diagnose and resolve problems concerning the horizontal deflection system.

X-Ray Protection Troubleshooting

Flowchart to diagnose and resolve issues with the X-ray protection circuit.

Waveform Analysis for Key Components

Power and Input Signal Waveforms

Oscilloscope waveforms for power output (FE401) and input signals (Horizontal, Vertical).

Drive and Vertical Output Waveforms

Waveforms for horizontal drive (Q605, Q604) and vertical output (IC201).

Collector and Clamp Signal Waveforms

Oscilloscope waveforms for collector signals (Q702, Q501) and clamp input (IC501).

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