Kortek KTN-2001 User Manual

1
SERVICE MANUAL
KTN-2001 / KTN-1401
Rev. No. : “A”

Kortek KTN-2001 Specifications

General

Brand	Kortek
Model	KTN-2001
Category	Monitor
Language	English

Summary

1. PRECAUTIONS

1-1 SAFETY PRECAUTIONS

General safety precautions for servicing the monitor, including avoiding modifications and disconnecting power.

1-1-1 FIRE & SHOCK HAZARD

Details on fire and shock hazards, wire inspection, and replacement part characteristics.

1-1-2 X-RADIATION

Information on X-radiation sources and precautions, focusing on high voltage levels.

1-2 SERVICING PRECAUTION

Further servicing precautions, including reading safety sections and handling components.

2. PRODUCT SPECIFICATIONS

2-1 SPECIFICATIONS

Detailed technical specifications for the KTN-2001 model, covering voltage, power, and operating parameters.

2) KTN-1401 SPECIFICATIONS

Technical specifications specific to the KTN-1401 model, detailing its operational parameters.

2-2 PCB DIMENSIONS

1) MAIN PCB LAYOUT

Diagram and layout for the main printed circuit board (PCB) of the monitor.

2) SOCKET PCB LAYOUT

Diagram and layout for the socket printed circuit board (PCB).

2-2-1 6-PIN SIGNAL CABLE CONNECTOR

Pinout description for the 6-pin signal cable connector.

2-2-2 PIN DESCRIPTION

Detailed description of the pin assignments for a connector.

2-3 TIMING CHART

3. OPERATING INSTRUCTIONS

3-1 CONTROL PCB FUNCTION

Identifies the location and function of controls on the main PCB assembly.

4. ADJUSTMENT PROCEDURES

4-1 ADJUSTMENT CONTROL

Details on controls and procedures for monitor adjustments, including warm-up time.

4-2 DISPLAY CONTROL ADJUSTMENTS

Specific adjustments for display controls like H-SIZE, V-SIZE, H-POSI, V-POSI, and focus.

5. BLOCK DIAGRAM OVERVIEW

6. GENERAL THEORY OF OPERATION

6-1 MONITOR BLOCK DIAGRAM

Explanation of the overall monitor block diagram and its sections.

6-2 VIDEO DRIVE SECTION

Detailed circuit diagram and explanation of the video drive section.

6-3 VIDEO OUTPUT AMP & BIAS SECTION

Description and circuit of the video output amplifier and bias section.

6-4 SMPS CIRCUIT SECTION

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

6-5 HORIZONTAL PROCESSOR SECTION

Details on the horizontal processor section, including IC301 (TDA2595) functions.

6-6 VERTICAL OUTPUT CIRCUIT SECTION

Explanation and circuit diagram of the vertical output circuit section.

6-7 HORIZONTAL DRIVE & OUTPUT CIRCUIT SECTION

Circuit diagram and explanation for the horizontal drive and output circuit section.

6-8 G1 & BRIGHTNESS CONTROL CIRCUIT

Details on the G1 control and brightness adjustment circuit.

6-9 SYNC CONTROL CIRCUIT

Explanation and circuit diagram of the sync control circuit.

6-10 ADJUSTMENT METHODS KTN-2001 (1401)

1. B+ Voltage Adjustment

Procedure for adjusting the B+ voltage, including measuring terminals and conditions.

2. Screen Voltage Adjustment

Method for adjusting screen voltage, specifying measurement and adjustment points.

3. High Voltage Adjustment

Steps for high voltage adjustment, specifying terminals, voltage, and conditions.

4. Contrast Adjustment

Procedure for adjusting contrast, including measuring terminals, voltage, and brightness.

5. Horizontal Raster Position Adjustment

Instructions for adjusting the horizontal raster position.

6. Coordinate Value Check

Procedure for checking coordinate values after adjustments.

7. Other V/R Adjustments

Methods for adjusting other variable resistors (V/R) like H-size and V-size.

8. High Voltage Regulation Check

Method for checking high voltage regulation under various conditions.

7. TROUBLESHOOTING GUIDE

7-1 NO-POWER ISSUES

Troubleshooting flowchart for issues related to the monitor not powering on.

7-2 NO-VIDEO ISSUES

Troubleshooting flowchart for cases where the monitor displays no video signal.

7-3 NO-SYNC PROBLEM

Troubleshooting flowchart for problems related to the absence of sync signals.

7-4 VERTICAL DEFLECTION PROBLEM

Troubleshooting flowchart for vertical deflection issues.

7-5 HORIZONTAL DEFLECTION PROBLEM

Troubleshooting flowchart for horizontal deflection issues.

7-6 X-RAY PROTECTION PROBLEM

Troubleshooting flowchart for issues related to X-ray protection.

8. WAVEFORMS FOR MAJOR COMPONENTS

1) FE401 DRAIN OUTPUT WAVEFORM

Waveform characteristics of the FE401 drain output.

2) HORIZONTAL INPUT WAVEFORM

Waveform characteristics of the horizontal input signal.

3) VERTICAL INPUT WAVEFORM

Waveform characteristics of the vertical input signal.

4) Q605 HORIZONTAL DRIVE WAVEFORM

Waveform characteristics of the Q605 horizontal drive signal.

5) Q604 HORIZON OUTPUT WAVEFORM

Waveform characteristics of the Q604 horizon output signal.

6) IC201 PIN 1 VERTICAL OUTPUT WAVEFORM

Waveform characteristics of the IC201 PIN 1 vertical output.

7) CLAMP (IC501 PIN 14) WAVEFORM

Waveform characteristics at IC501 PIN 14 (Clamp).

8) Q702 COLLECTOR PULSE WAVEFORM

Waveform characteristics of the Q702 collector pulse.

9) IC501 (1203) PIN 25 INPUT WAVEFORM

Waveform characteristics at IC501 PIN 25 input.

10) Q501 COLLECTOR WAVEFORM

Waveform characteristics of the Q501 collector.