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Sony Trinitron KV-21FT250 User Manual

Sony Trinitron KV-21FT250
67 pages
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TRINITRON
®
COLOR TELEVISION
SERVICE MANUAL
BX-1S
CHASSIS
MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO.
9-883-762-02
KV-21FT250
RM-YA005 LATIN NORTH SCC-S85A-A
HISTORY INFORMATION FOR THE FOLLOWING MANUAL:
ORIGINAL MANUAL ISSUE DATE: 8/2007
:UPDATED ITEM
REVISION DATE SUBJECT
8/2007 No revisions or updates are applicable at this time.
5/2008 Added new PN for IC IC001. New PN includes software data. Replaced pg. 60.

Table of Contents

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Sony Trinitron KV-21FT250 Specifications

General IconGeneral
Screen Size21 inches
Display TechnologyCRT
Aspect Ratio4:3
Remote ControlIncluded
Input PortsComposite, RF
TunerAnalog
Power Consumption90W
Weight24 kg
Audio Output2 x 5W speakers

Summary

Specifications and Trademarks

General Product Specifications

Key technical details about the TV, including power, dimensions, and inputs.

Sony Brand Trademarks

Lists registered trademarks associated with Sony products.

Warnings and Cautions

Safety-Related Component Warnings

Highlights critical components essential for safe operation and proper replacement.

Safety Check-Out Procedures

Post-Repair Safety Checks

Ensures proper repair execution, including connection checks and AC leakage testing.

Self-Diagnostic Function

Diagnostic Test Indicators

Explains STANDBY LED flash codes for identifying error sources and symptoms.

Using the Self-Diagnostic Screen

Guides on accessing, interpreting, and clearing diagnostic results for troubleshooting.

Section 1: Disassembly Procedures

Removing External Covers and Speakers

Step-by-step instructions for accessing internal components by removing the rear cover and speakers.

Chassis Assembly and Picture Tube Removal

Procedures for safely removing the main chassis assembly and the CRT picture tube.

Anode Cap Removal and Handling

Detailed instructions and warnings for safely discharging and removing the picture tube anode cap.

Section 2: Wire Dressing Procedures

H3 Board and Connector Wiring

Specific guidance on connecting and dressing wires on the H3 board and associated connectors.

A and C Board Wire Management

Instructions for routing wires on the A and C boards, ensuring proper placement and preventing damage.

AC Power Cord and Speaker Wire Routing

Procedures for dressing AC power cords and speaker wires, focusing on heat and physical protection.

Internal Wire Dressing Techniques

Covers dressing procedures for DY, FBT, HV Cap, and AC power cords for optimal internal layout.

Section 3: Set-Up Adjustments

Beam Landing and Convergence Adjustment

Steps for aligning electron beams and color convergence on the screen for picture clarity.

Focus and Screen (G2) Adjustment

Procedures for fine-tuning picture focus and screen brightness levels.

Section 4: Circuit Adjustments

Remote Control Service Functions

Identifies remote buttons for service access and lists required test equipment.

Accessing and Using the Service Menu

Detailed guide on entering the service menu and navigating through adjustment categories.

White Balance and Picture Quality Tuning

Steps for adjusting white balance, color temperature, and other picture quality parameters.

Geometry and System-Specific Adjustments

Adjustments for screen geometry and settings specific to PAL/NTSC color systems.

Section 5: Diagrams and Schematics

Circuit Board Layout and Information

Shows locations of main boards and explains schematic symbols and notations.

System Block Diagram

Provides a high-level overview of the TV's signal flow and functional blocks.

Detailed Schematics and Waveforms

Contains schematics for specific boards (A, C, H3) and associated waveform references.

Semiconductor Component Identification

Lists common semiconductor devices with package types for easy identification.

Section 6: Exploded Views

Chassis, CRT, and Speaker Assembly Breakdown

Illustrates the mechanical structure of the TV for component replacement and identification.

Section 7: Electrical Parts List

Capacitor and Resistor Parts

Detailed list of capacitors and resistors with part numbers, values, and specifications.

Diodes, ICs, and Other Components

Comprehensive list of diodes, integrated circuits, connectors, and other electronic parts with part numbers.

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