Sony TRINITRON KV-J25MF8J User manual

MODEL COMMANDER DEST. CHASSIS NO.
KV-J25MF8J RM-873 ME SCC-K57P-A
MODEL COMMANDER DEST. CHASSIS NO.
KV-J29MF8J RM-873 ME SCC-K57N-A
CHASSIS
TRINITRON ® COLOR TV
BG-1L
SERVICE MANUAL

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Note
Power requirements 110-240 VAC, 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
Antenna 75-ohm external terminal
Audio output (speaker) 6W + 6W
Number of terminal
Video Input: 3 Output:1 Phono jacks; 1 Vp-p, 75 ohms
Audio Input: 3 Output: 1 Phono jacks; 500 mVrms
S Video Input: 1 Y : 1 Vp-p, 75 ohms,
unbalanced, sync negative
C : 0.286 Vp-p, 75 ohms
Headphone Output: 1 Minijack
Picture tube Super Trinitron Super Trinitron Plus
(25 in.) (29 in.)
Tube size (cm) 64 72 Measured diagonally
Screen size (cm) 60 68 Measured diagonally
Dimension (w/h/d, mm) 712 ×521 ×520 780 ×577 ×542
Mass (kg) 33 43
Accessory (optional) TV stand (SU-25H) TV stand (SU-29H)
SPECIFICATIONS
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
REMOVING THE ANODE.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK !
ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND
IN THE PARTS LISTARE CRITICALTO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
KV-J25MF8J KV-J29MF8J
Design and specifications are subject to change without notice.

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TABLE OF CONTENTS
Section Title Page
1. GENERAL........................................................................ 4
2. DISASSEMBLY
2-1. Rear Cover Removal................................................ 11
2-2. Speaker Removal ..................................................... 11
2-3. ChassisAssy Removal ............................................. 11
2-4. Service Position ....................................................... 12
2-5. S1 Board Removal ................................................... 12
2-6. A and D Boards Removal ........................................ 12
2-7. F1 and H3 Boards Removal..................................... 13
2-8. Picture Tube Removal.............................................. 13
3. SET-UP ADJUSTMENTS
3-1. Beam Landing.......................................................... 15
3-2. Convergence............................................................. 16
3-3. FocusAdjustment .................................................... 19
3-4. G2 (Screen) and White BalanceAdjustments......... 20
4. SELF DIAGNOSIS FUNCTION................................ 21
5. CIRCUIT ADJUSTMENT
5-1. Adjustments with Commander ................................ 22
5-2. Adjustment Method ................................................. 23
5-3. Picture Quality Adjustment ..................................... 27
5-4. A Board Adjustment ................................................ 27
5-5. ABoardAdjustyment After IC003 (Memory)
Replacement............................................................. 28
5-6. Picture Distortion Adjustment ................................. 28
Section Title Page
6. DIAGRAMS
6-1. Block Diagram ......................................................... 29
6-2. Frame Schematic Diagram ...................................... 31
6-3 Circuit Boards Location .......................................... 34
6-4. Schematic Diagrams and Printed Wiring Boards.... 34
(1) Schematic Diagrams of D, F1 and H3 Boards ........ 35
(2) Schematic Diagram of A Board............................... 43
(3) Schematic Diagram of S1 Board ............................. 50
(4) Schematic Diagram of C2 Board ............................ 53
(5) Schematic Diagrams of VM Board ......................... 55
6-5. Semiconductors........................................................ 57
7. EXPLODED VIEWS
7-1. Picture Tube ............................................................. 59
7-2. Chassis ..................................................................... 60
8. ELECTRICAL PARTS LIST....................................... 61

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

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