Sony Trinitron KV-25XBR User Manual

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SERVICE MANUAL
US Model
Chassis No. SCC-595B-A
December, 1984
P2BcHAss1s
Television system
SPEC! Fl CATIONS
Outputs
TV OUT (AV jack)
American TV standards
Channel coverage
Picture tube
Antenna
Inputs
'I/IICROFILM
VHF: 2-13
UHF: 14-69
Cable TV: 1-125
Microblack Trinitron
25-inch picture measured
diagonally
114-degree deflection
75-ohm external antenna terminal
for VHF/UHF/CATV
VIDEO 1, 3 INPUT (phono jacks)
Video: 1 V p-p, 75 ohms
unbalanced, sync negative
Audio: 408mVrms (100% modula-
tion, 47 kilohms)
VIDEO 2 IN AV (AV jack)
Video: 1 Vp-p, 75 ohms unbalanc-
ed, sync negative
Audio: 408mVrms (100% modula-
tion, 47 kilohms)
RGB MULTI INPUT (See next page.)
CONTROL IN (minijack)
5V p-p
75-ohm external antenna terminal
for VHF/UHF/CATV
AUX 75-ohm auxiliary antenna
terminal
FROM TV STAND connector tor the
optional SU-171 TY stand
Video: 1 Vp-p, 75 ohms unbalanc-
ed, sync negative
Audio: 408mVrms (100%
modulation, 5 kilohms)
MONITOR OUTPUT (phono jack)
Video: 1 Vp-p, 75 ohms
unbalanced, sync negative
Audio: 408mVrms (100%
modulation, 5 kilohms)
CONTROL OUT (minijack)
5V p-p
PHONES (stereo minijack)
Accepts 8-ohm headphones
SPEAKER
Accepts speakers of 8 ohms
TO CONVERTER terminal
Power requirements
120V AC, 60 Hz
Power consumption
185 W (max.)
1.5 W (in standby condition)
Dimensions 635 x 547 x 478 mm (25 x 215/s x
187/s inches) without speakers
700 x 547 x 478 mm (275/s x 215/s
x 187/s inches) including speakers
Weight 45 kg (991b 4oz)
(without speakers)
- Continued on page 2 -
TRINITRON® COLOR TV
SONY:

Sony Trinitron KV-25XBR Specifications

General

Screen Size	25 inches
Display Technology	CRT
Aspect Ratio	4:3
Video Interface	Composite, S-Video
Audio Outputs	Stereo RCA
Speakers	Stereo

Summary

SAFETY-RELATED COMPONENT WARNING

Confirming of Hold Down Circuit

Checks for HV hold down circuit operation and voltage confirmations.

V. SIZE CONFIRMATION

H. SIZE CONFIRMATION

PROTECTOR CONFIRMATION

Tests to confirm the protector circuit activation and raster disappearance.

MAXIMUM +B VOLTAGE CONFIRMATION

SAFETY CHECK-OUT

LEAKAGE TEST

Procedure for checking AC leakage current from exposed metal parts to ground.

HOW TO FIND A GOOD EARTH GROUND

SECTION 1 OUTLINE

OPERATION

ADDITIONAL PICTURE AND SOUND ADJUSTMENTS

Guide to fine-tuning picture and sound settings using front panel controls.

SECTION 2 DISASSEMBLY

2-2. PICTURE TUBE REMOVAL

SECTION 3 SET-UP ADJUSTMENTS

3-1. BEAM LANDING

Procedure for adjusting beam landing for proper color purity and convergence.

3-2. CONVERGENCE

Instructions for static and dynamic convergence adjustments to align color beams.

3-3. WHITE BALANCE

SECTION 4 CIRCUIT ADJUSTMENTS

4-1. A BOARD ADJUSTMENT

Specific adjustments for the A board, including black level and position settings.

4-2. X BOARD ADJUSTMENTS

Adjustments for the X board related to signal setup and noise reduction.

4-3. D BOARD ADJUSTMENT

Adjustments for D board distortions and horizontal synchronization.

SECTION 5 DIAGRAMS

5-3. SCHEMATIC DIAGRAM

Detailed electrical schematics showing component connections and circuit functions.

6-2. CRT

SECTION 7 ELECTRICAL PARTS LIST

SUPPLEMENT

SUBJECT: CIRCUIT MODIFICATIONS

Details on specific circuit changes and updates to the original service manual.