Sony TRINITRON KV-J14M1J User manual

MODEL COMMANDER DEST. CHASSIS NO.
KV-J14M1J RM-869 ME SCC-U07P-A
MODEL COMMANDER DEST. CHASSIS NO.
CHASSIS
BG-2S
SERVICE MANUAL
TRINITRON ® COLOR TV

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KV-J14M1J Note
Power requirements 110-240 V AC, 50/60 Hz
Power consumption (W) Indicated on the rear of the TV
Television system B/G, I, D/K, M
Color system PAL, PAL 60, SECAM, NTSC4.43, NTSC3.58
Channel coverage
B/G VHF: E2 to E12/UHF: E21 to E69/CATV: S01 to S03, S1 to S41
IUHF: B21 to B68/CATV: S01 to S03, S1 to S41
D/K VHF: C1 to C12, R1 to R12/
UHF: C13 to C57, R21 to R60/
CATV: Z1 to Z39, S01 to S03, S1 to S41
MVHF: A2 to A13/ UHF: A14 toA79/
CATV: A-8 to A-2,A to W+4, W+6 to W+84
Audio output (speaker) 3W+3W
Inputs ˘(antenna): 75 ohms external terminal
…(video input) jacks: phono jacks
D(video): 1 Vp-p, 75 ohms
≥(audio): 500 mVrms, high impedance
Outputs A(earphone) jack: mini jack
Ú(monitor output) jacks: phono jacks
D(video): 1 Vp-p, 75 ohms
≥(audio): 500 mVrms
Picture tube 14 in.
Tube size (cm) 37 Measured diagonally
Screen size (cm) 34 Measured diagonally
Dimensions (w/h/d, mm) 456 ×343 ×416
Mass (kg) 12
Design and specifications are subject to change without notice.
SPECIFICATIONS
SAFETY-RELATED COMPONENTWARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK ¡¡
¡¡
¡
ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLIMENTS
PUBLISHED BY SONY.
CAUTION
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE
AND THE ANODE CAP TO THE METAL CHASSIS, CRT
SHIELD, OR CARBON PAINTED ON THE CRT, AFTER
REMOVINGTHE ANODE.

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TABLE OF CONTENTS
1. GENERAL....................................................................... 4
2. DISASSEMBLY
2-1. Rear Cover Removal .............................................. 8
2-2. A Board Removal ................................................... 8
2-3. Service Position ...................................................... 8
2-4. Replacement of Parts .............................................. 8
2-5. Demagnetization Coil and Picture Tube Removal. 9
3. SET-UP ADJUSTMENTS
3-1. Beam Landing......................................................... 10
3-2. Convergence ........................................................... 11
3-3. Focus Adjustment ................................................... 13
3-4. G2 (Screen) and White Balance Adjustments........ 13
4. SELF DIAGNOSIS FUNCTION............................... 14
5. CIRCUIT ADJUSTMENTS
5-1. Adjustments with Commander ............................... 15
5-2. Adjustment Method ................................................ 16
5-3. A Board Adjustment after IC003 (Memory)
Replacement............................................................ 20
5-4. Picture Distortion Adjustment ................................ 20
Section Title Page Section Title Page
6. DIAGRAMS
6-1. Block Diagram ........................................................ 21
6-2. Circuit Boards Location ......................................... 24
6-3. Schematic Diagrams and Printed Wiring Boards .. 24
(1) Schematic Diagram of A Board.............................. 29
(2) Schematic Diagram of C Board.............................. 32
6-4. Semiconductors....................................................... 33
7. EXPLODED VIEWS
7-1. Chassis .................................................................... 35
8. ELECTRICAL PARTS LIST...................................... 36

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SECTION 1
GENERAL The operating instructions mentioned here are partial abstracts from the
Operating Instructions Manual. The page numbers of the Operating
Instruction Manual remain as in this manual.

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SECTION 2
DISASSEMBLY
2-1. REAR COVER REMOVAL 2-2. A BOARD REMOVAL
2-3. SERVICE POSITION
2-4. REPLACEMENT OF PARTS
For replacement of the Control Button, cut the welded portions from them, exchange with the new parts, and fix them with screws (+BVTP)
respectively.
2-4-1. REPLACEMENT OF CONTROL BUTTON
2 Remove the rear cover.
1 Five screws (BVTP4×16)
Lever
Lever
A board
A board
Two screws
(BVTP 3x12)
Cut Multi button
Multi button

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1Turn up one side of the rubber cap in
the direction indicated by the arrowa.
2Using a thumb, pull up the rubber
cap firmly in the direction indicated
by the arrow b.
1Don’t hurt the surface of anode-caps with
sharp shaped objects!
2Don’t press the rubber too hard so as not to
damage the inside of anode-caps!
A material fitting called the shatter-hook
terminal is built into the rubber.
3Don’t turn the foot of rubber over too hard!
The shatter-hook terminal will stick out or
damage the rubber.
•HOWTO HANDLEAN ANODE-CAP
3When one side of the rubber cap is
separated from the anode button,
the anode-cap can be removed by
turning up the rubber cap and
pulling it up in the direction of the
arrow c.
•REMOVAL OF ANODE-CAP
NOTE : Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or carbon paint on the
CRT, after removing the anode.
•REMOVING PROCEDURES
2-5. DEMAGNETIZATION COIL AND PICTURE TUBE REMOVAL
a
b
b
c
aAnode button
2A board
3C board
4Deflection yoke
Cushion
5Four screws
(Tapping screws)
1Anode cap
8Picture tube
7
Spring
6Demagnetization
coil

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•The following adjustments should be made when a complete
realignment is required or a new picture tube is installed.
•These adjustments should be performed with rated power
supply voltage unless otherwise noted.
Controls and switch should be set as follows unless otherwise noted:
PICTURE control........................................................... normal
BRIGHTNESS control................................................... normal
SECTION 3
SET-UP ADJUSTMENTS
Fig. 3-1
Preparations :
•In order to reduce the influence of geomagnetism on the set's
picture tube, face it east or west.
•Switch on the set's power and degauss with the degausser.
3-1. BEAM LANDING
1. Input the white raster signal with the pattern generator.
Contrast
Brightness
2. Set the pattern generator raster signal to green.
3. Move the deflection yoke to the rear and adjust with the purity
control so that the green is at the center and the blue and the red
take up equally sized areas on each side.
(See Figures 3-1 through 3-3.)
4. Move the deflection yoke forward and adjust so that the entire
screen is green. (See Figure 3-1.)
5. Switch the raster signal to blue, then to red and verify the
condition.
6. When the position of the deflection yoke has been decided,
fasten the deflection yoke with the screws.
7. If the beam does not land correctly in all the corners, use a
magnet to adjust it.
(See Figure 3-4.)
Perform the adjustments in order as follows :
1. Beam Landing
2. Convergence
3. Focus
4. White Balance
Note : Test Equipment Required.
1. Color-bar/Pattern Generator
2. Degausser
3. Oscilloscope
Fig. 3-2
Fig. 3-4
}normal
.................................................................................................................................................................................................................................
Fig. 3-3
Purity control
GREEN
BLUE RED
Deflection yoke positioning
corrects these areas.
Purity control corrects
this area. Disk magnets or rotatable
disk magnets correct
these areas (a-d).
b
c
a
d