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Citizen JCTV3242 User Manual

Citizen JCTV3242
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SERVICE MANUAL
JCTV3242
Design and specifications are subject to change without notice.
COLOR TELEVISION RECEIVER
ORIGINAL
MFR'S VERSION A
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Citizen JCTV3242 Specifications

General IconGeneral
BrandCitizen
ModelJCTV3242
CategoryTV
LanguageEnglish

Summary

SERVICING NOTICES ON CHECKING

AVOID AN ELECTRIC SHOCK

Warning about high voltage parts and the danger of electric shock when current is flowing.

PERFORM A SAFETY CHECK AFTER SERVICING

Procedure to confirm all parts and wiring are in place and to perform insulation checks after repair.

HOW TO ORDER PARTS

IMPORTANT

GENERAL SPECIFICATIONS

TV System (G-1)

Details specifications for the TV system, including CRT size, type, deflection, color system, and speaker.

Tuning System (G-2)

Covers specifications related to the tuning system, broadcasting system, tuner, and intermediate frequency.

Power (G-3)

Outlines power source, consumption, and protector specifications for the unit.

On Screen Display (G-7)

Details the available settings and features within the On-Screen Display menu for picture and audio.

GENERAL SPECIFICATIONS

Remote Control (G-10)

Lists all functions and keys available on the remote control unit for operating the TV.

GENERAL SPECIFICATIONS

Features (G-11)

Enumerates various features of the TV, including Auto Degauss, Auto Shut Off, CATV, and V-Chip.

Accessories (G-12)

Lists the included accessories such as owner's manual, remote control, rod antenna, and various cords.

GENERAL SPECIFICATIONS

Interface (G-13)

Describes the input/output interfaces and terminals, including front and rear connections like Video, Audio, and Antenna input.

Cabinet Material (G-17)

Identifies the material used for the cabinet front and rear, specifying PS 94V0 DECABROM.

DISASSEMBLY INSTRUCTIONS

REMOVAL OF ANODE CAP

Step-by-step guide on safely removing the anode cap, including discharging high voltage and proper handling.

DISASSEMBLY INSTRUCTIONS

REMOVAL AND INSTALLATION OF FLAT PACKAGE IC

Detailed procedure for removing and installing flat package ICs using a desoldering machine and tweezers.

DISASSEMBLY INSTRUCTIONS

INSTALLATION OF FLAT PACKAGE IC

Steps for installing a new IC, including polarity, soldering techniques, and final inspection.

SERVICE MODE LIST

CONFIRMATION OF HOURS USED

WHEN REPLACING EEPROM (MEMORY) IC

ELECTRICAL ADJUSTMENTS

BEFORE MAKING ELECTRICAL ADJUSTMENTS

Precautions and required tools before performing any electrical adjustments or repairs.

BASIC ADJUSTMENTS

RF AGC (2-1)

Procedure to adjust RF AGC to a specific voltage level using a monoscope pattern.

CUT OFF (2-2)

Method for adjusting the CUT OFF level by setting the screen volume to achieve a dim raster.

WHITE BALANCE (2-4)

Procedure to adjust white balance (R.BIAS, R.DRIVE, etc.) after CUT OFF adjustment.

BASIC ADJUSTMENTS

SUB TINT/SUB COLOR (2-6)

Procedure to adjust tint and color centering using color bar patterns and oscilloscope.

HORIZONTAL PHASE (2-7)

Method to adjust horizontal phase by minimizing over scan on the right and left sides.

VERTICAL SIZE (2-8)

How to adjust vertical size to achieve a specific over scan percentage on the picture.

OSD HORIZONTAL (2-10)

Adjusts the horizontal position of the On-Screen Display elements.

BASIC ADJUSTMENTS

SEPARATION 1, 2 (2-12)

Adjusts audio separation for stereo signals using an oscilloscope and signal generator.

FM LEVEL (2-13)

Procedure to adjust FM level to a specific AC voltage using a monoscope pattern.

PURITY AND CONVERGENCE ADJUSTMENTS

STATIC CONVERGENCE (ROUGH ADJUSTMENT) (3-1)

Initial static convergence adjustments using magnets and purity rings to align colors.

PURITY (3-2)

Adjusts purity magnets and deflection yoke to ensure uniform color across the screen.

STATIC CONVERGENCE (3-3)

Fine-tuning static convergence by adjusting 4 and 6 pole magnets to align color patterns.

DYNAMIC CONVERGENCE (3-4)

Adjusts dynamic convergence by moving the deflection yoke and inserting wedges to fix alignment.

ELECTRICAL ADJUSTMENTS

PARTS LOCATION GUIDE (WIRING CONNECTION)

Diagram showing the location of key components and wiring connections for electrical adjustments.

BLOCK DIAGRAM

PRINTED CIRCUIT BOARDS

MAIN/CRT/AUDIO (INSERTED PARTS)

Shows the component layout on the solder side of the main, CRT, and audio printed circuit boards.

PRINTED CIRCUIT BOARDS

MAIN/CRT (CHIP MOUNTED PARTS)

Illustrates the placement of chip-mounted components on the solder side of the main and CRT printed circuit boards.

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