Sony TRINITRON KV-20FS12 User Manual

SERVICE MANUAL BA-5 CHASSIS
MODEL COMMANDER DEST CHASSIS NO.
KV-20FS12 RM-Y173 US SCC-S40A-A
KV-20FS12 RM-Y173 CND SCC-S41A-A
KV-20FV12 RM-Y168 US SCC-S40B-A
KV-20FV12 RM-Y168 CND SCC-S41B-A
KV-21FE12 RM-Y173 E SCC-S38A-A
KV-21FE12A RM-Y173 E SCC-S38F-A
KV-21FE12C RM-Y173 E SCC-S38B-A
KV-21FM12 RM-Y172 MX SCC-S39A-A
KV-21FV12 RM-Y168 E SCC-S38C-A
KV-21FV12C RM-Y168 E SCC-S38D-A
TRINITRON
®
COLOR TV
RM-Y168KV-21FV12
879 Front.p65 01/31/00, 3:10 PM1

Sony TRINITRON KV-20FS12 Specifications

General

Screen Size	20 inches
Display Type	CRT
Resolution	480i
Aspect Ratio	4:3
Comb Filter	3D Digital Comb Filter
Speakers	2
Inputs	Composite, S-Video

Summary

Specifications

Section 2 Disassembly

2-1. Rear Cover Removal

Procedure for removing the rear cover of the TV chassis.

2-2. Chassis Assembly Removal

Steps to remove the main chassis assembly from the TV.

2-3. Service Position

How to position the chassis for service.

2-4. Picture Tube Removal

Steps for safely removing the picture tube.

Section 3 Set-Up Adjustments

3-1. Beam Landing

Adjusting the convergence of electron beams for picture clarity.

3-2. Convergence

Aligning red, green, and blue electron beams for a sharp image.

3-3. Focus

Adjusting the picture focus for sharpness.

3-4. Screen (G2)

Adjusting screen grid voltage for optimal picture brightness.

3-5. Method of Setting the Service Adjustment Mode

Procedure to access and use the TV's service adjustment mode.

3-6. White Balance Adjustments

Calibrating color balance for accurate white reproduction.

Vertical Static Convergence

Adjusting static convergence for vertical alignment.

Horizontal Static Convergence

Adjusting static convergence for horizontal alignment.

Dynamic Convergence Adjustment

Performing dynamic convergence adjustments for optimal picture geometry.

Screen-Corner Convergence

Adjusting convergence at the screen corners using permalloy.

Section 4 Safety Related Adjustments

4-1. R562 Confirmation Method (HV Hold-Down Confirmation and Readjustments)

Verifying and adjusting HV hold-down circuit using R562.

4-2. B+ Voltage Confirmation and Adjustment

Confirming and adjusting the B+ voltage supply line.

Self-Diagnostic Function

Diagnostic Test Indicators

Explains the meaning of STANDBY/TIMER LED flash codes for diagnostics.

Display of Standby/Timer LED Flash Count

Stopping the Standby/Timer LED Flash

Method to stop the flashing STANDBY/TIMER LED.

Handling of Self-Diagnostic Screen Display

Clearing the Result Display

Steps to clear diagnostic results to "0".

Safety Check-Out

Leakage Test

Procedure for measuring AC leakage current from metal parts to ground.

Connecting Your TV

Basic Connections

How to connect the TV to an antenna or CATV cable.

Connecting Additional Equipment

TV and VCR

Connecting a TV to a VCR for playback and viewing.

Using the Remote Control and Basic Functions

Using the Remote Control

Explains the function of each button on the remote control.

Other Information

Troubleshooting

Common TV problems and their suggested solutions for users.

Section 5 Circuit Adjustments

5-1. Setting the Service Adjustment Mode

Procedure to enter the TV's service adjustment mode.

Service Adjustment Mode On

What the screen displays upon entering service mode.

Service Adjustment Mode Memory

How to save settings in service mode.

5-2. Memory Write Confirmation Method

How to verify that adjustments were saved correctly.

5-3. Adjustment Buttons and Indicators

Identification of remote control buttons used for service adjustments.

H. Size Adjustment (HSIZ)

Adjusting the horizontal size of the displayed image.

V. Size Adjustment (VSIZ)

Adjusting the vertical size of the displayed image.

V. Center Adjustment (VPOS)

Adjusting the vertical position of the displayed image.

H. Center Adjustment (HPOS)

Adjusting the horizontal position of the displayed image.

V. Linearity (VLIN), V. Correction (VSCO), Pin Amp (PAMP), and Horizontal Trapezoid (TRAP) Adjustments

Adjusting various picture geometry parameters.

V. Angle (VANG), V. Bow (VBOW), Upper pin (UPIN) and Low Pin (LPIN) Adjustments

Adjusting vertical angle, bowing, and pin distortion.

5-4. MB Board Adjustments

H. Frequency (Free Run) Check

Checking the horizontal frequency in free run mode.

V. Frequency (Free Run) Check

Checking the vertical frequency in free run mode.

Drive (RDRV) Adjustments

Adjusting the RDRV signal for color and picture quality.

Sub Bright Adjustment (SBRT)

Adjusting the sub-brightness for optimal picture contrast.

Sub Hue, Sub Color Adjustment (SHUE, SCOL)

Adjusting sub-hue and sub-color for accurate color representation.

Section 6 Diagrams

6.1 Block Diagram

Overall block diagram of the TV's electronic circuits.

6.2 Circuit Board Locations

Identifying the physical location of major circuit boards within the TV.

6-3. Printed Wiring Boards and Schematic Diagrams

Schematics and wiring diagrams for various circuit boards.

6-4. Semiconductors

Section 7 Exploded View

7-1. Chassis (KV-21FE12/21FE12C ONLY)

Exploded view and parts list for the chassis of specific models.

7-2. Chassis (KV-21FE12A ONLY)

Exploded view and parts list for the chassis of the KV-21FE12A model.

7-3. Chassis (KV-20FV12/21FV12/21FV12C ONLY)

Exploded view and parts list for the chassis of specific models.

7-4. Chassis (KV-20FS12/21FM12 ONLY)

Exploded view and parts list for the chassis of specific models.

Section 8 Electrical Parts List

Correction - 2

SUBJECT: IC1001 AND IC1301 P/N CORRECTION

Corrects part numbers for IC1001 and IC1301 as per the service manual.