Sony KV-27EXR25 PHOTOFACT User Manual

PHOTOFACT,
Technical Service Data
INDEX
Adjustment and Alignment Tools .... 1
Convergence Adjustments .......... 6
GridTrace Location Guide
ABoard .................... .8
..9
GBoard .................... .9
.8
PBoard-TopBoard ........... 8
UlBoard .9
................... .9
Important Parts Information ........ 10
Miscellaneous Adjustments ......... 6
PartsList ................. 9,10,11
Photos
ABoard .................. .7,8
CBoard .................... .9
Cabinet - Rear View ........... 1
CRT Neck Assembly .......... 6
GBoard .................... .9
HBoard .................... .8
PBoard-BottomBoard ..... .7,8
PBoard-TopBoard ........ .7,8
Ul Board ................. .4,9
U2Board ................. .8,9
! Troubleshooting Quick-Checks
ABoard .................... .7
CBoard .................... .9
PIP Adjustments .................. 6
Placement Chart ................. .5
Safety Precautions ............... 1
Safety Related Adjustments ......... 6
Schematics
CRT ....................... .2
Control ...................... .
D/A Converter ................ 2
MTS Decoder ............... .3
PIP
.......................... 4
Power Supply ................ .4
Television ................... .2
Terminal Guides and Notes ........ .7
Test Equipment ................... 1
Troubleshooting ................... 1
Tuner Terminal Guide ............. 6
Tuner Voltage Chart ............... 6
For Supplier Address,
See PHOTOFACT Annual Index
SONY
Model W-27EXR25 (Chassis SCC-D50F-A)
Complete coverage
for servicing a television receiver...
l Schematics
l Component
locations
l Parts lists
l Troubleshooting
guide
Coverage includes this additional model and chassis:
MODEL
CHASSIS
KV-27EXR20
SCC-DSOE-A
HOWARD W. SAMS & COMPANY
DECEMBER 1991 SET 2910

Sony KV-27EXR25 PHOTOFACT Specifications

General

Brand	Sony
Model	KV-27EXR25 PHOTOFACT
Category	TV
Language	English

Summary

Troubleshooting

Power Supply Troubleshooting

Steps for diagnosing and resolving power supply related issues.

Horizontal Circuit Troubleshooting

Steps for troubleshooting horizontal deflection and oscillator problems.

Vertical Circuit Troubleshooting

Steps for troubleshooting vertical deflection and linearity issues.

IF-AGC and Video Signal Troubleshooting

Diagnosing video signal path issues related to IF and AGC circuits.

Sync Signal Troubleshooting

Troubleshooting vertical and horizontal sync signal integrity.

Video and Chroma Signal Path Troubleshooting

Troubleshooting video and chroma signal processing and output.

Raster and Display Issue Troubleshooting

Diagnosing CRT display problems including shape and color purity.

Audio Signal Path Troubleshooting

Troubleshooting audio signal processing and output.

PIP (Picture-in-Picture) Troubleshooting

Troubleshooting PIP horizontal, vertical, video, and chroma signals.

Miscellaneous Adjustments

Digital Adjustment Procedures

Procedures for entering service mode and performing digital adjustments like DISP and HFRE.

Horizontal Control Adjustments

Adjustments for horizontal size, center, and pincushion correction.

Vertical Control Adjustments

Adjustments for vertical frequency, size, position, and linearity.

Color and Purity Adjustments

Adjustments for chroma trap, sub brightness, contrast, hue, color, and color purity.

Convergence and Color Temperature

Adjusting CRT convergence and color temperature settings.

PIP Adjustments

PIP Picture and Color Settings

Adjusting PIP brightness, contrast, sub color, sub tint, RGB, B-Y, and R-Y.

PIP Window Position and Size

Adjusting PIP window placement and overall size.

Safety Related Adjustments

R559 Confirmation and Readjustment

Procedure for confirming and readjusting R559 hold-down circuit.

R570 Confirmation and Readjustment

Procedure for confirming and readjusting R570 hold-down circuit.

B+ Voltage Confirmation

Procedure for confirming B+ voltage levels after component replacement.