Sony Trinitron PVM-14L5 User manual

.............. ......... ....................
SERVICE MANUAL
.............. ......... ....................
MODEL DEST. CHASSIS NO. MODEL DEST. CHASSIS NO.
PVM-14L5 US/CND SCC-G61K-A
PVM-20L5 US/CND SCC-G61L-A
PVM-D14L5A AUS SCC-H03D-A
PVM-D20L5A AUS SCC-H03E-A
TRINITRON®COLOR VIDEO MONITOR
REVISED-1

PVM-14L5/20L5/D14L5A/D20L5A
WARNING!!
AN INSULATEDTRANSFORMER SHOULD BE USED DURING
ANY SERVICE TO AVOID POSSIBLE SHOCK HAZARD, BE-
CAUSE OF LIVE CHASSIS.
THE CHASSIS OFTHIS RECEIVER IS DIRECTLY CONNECTED
TO THE AC POWER LINE.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIEDBY A !!
!!
!MARKONTHESCHEMATIC
DIAGRAMS, EXPLODEDVIEWS AND INTHE PARTS LIST ARE
CRITICAL TO SAFE OPERATION. REPLACE THESE COMPO-
NENTSWITH SONY PARTSWHOSE PART NUMBERS APPEAR
AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY. CIRCUIT ADJUSTMENTSTHAT ARE CRITI-
CALTO SAFE OPERATION ARE IDENTIFIED INTHIS MANUAL.
FOLLOW THESE PROCEDURES WHENEVER CRITICAL COM-
PONENTS ARE REPLACED OR IMPROPER OPERATION IS
SUSPECTED.
ATTENTION!!
AFIN D’ÉVITER TOUT RISQUE D’ÉLECTROCUTION
PROVENANT D’UN CHÂSSIS SOUS TENSION, UN
TRANSFORMATEUR D’ISOLEMENT DOIT ETRE UTILISÉLORS
DE TOUT DÉPANNAGE.
LE CHÂSSIS DE CE RÉCEPTEUR EST DIRECTEMENT
RACCORDÉ Á L’ALIMENTATION SECTEUR.
ATTENTION AUX COMPOSANTS RELATIFS Á LA
SÉCURITÉ!!
LES COMPOSANTS IDENTIFIÉS PAR UNE MAPQUE !!
!!
!SUR
LES SCHÉMAS DE PRINCIPE, LES VUES EXPLOSÉES ET LES
LISTES DE PIECES SONT D’UNE IMPORTANCE CRITIQUE
POUR LA SÉCURITÉ DU FONCTIONNEMENT. NE LES
REMPLACER QUE PAR DES COMPOSANTS SONY DONT LE
NUMÉRO DE PIÈCE EST INDIQUÉ DANS LE PRÉSENT
MANUEL OU DANS DES SUPPLÉMENTS PUBLIÉS PAR SONY.
LES RÉGLAGES DE CIRCUIT DONT L’IMPORTANCE EST CRI-
TIQUE POUR LA SÉCURITÉ DU FONCTIONNEMENT SONT
IDENTIFIÉS DANS LE PRÉSENT MANUEL. SUIVRE CES
PROCÉDURES LORS DE CHAQUE REMPLACEMENT DE
COMPOSANTS CRITIQUES, OU LORSQU’UN MAUVAIS
FONCTIONNEMENT EST SUSPECTÉ.
!WARNING
This manual is intended for qualified service personnel only.
To reduce the risk of electric shock, fire or injury, do not perform any servicing other than that
contained in the operating instructions unless you are qualified to do so. Refer all servicing to
qualified service personnel.
!WARNUNG
Die Anleitung ist nur für qualifiziertes Fachpersonal bestimmt.
Alle Wartungsarbeiten dürfen nur von qualifiziertem Fachpersonal ausgeführt werden. Um die
Gefahr eines elektrischen Schlages, Feuergefahr und Verletzungen zu vermeiden, sind bei
Wartungsarbeiten strikt die Angaben in der Anleitung zu befolgen.Andere als die angegeben
Wartungsarbeiten dürfen nur von Personen ausgeführt werden, die eine spezielle Befähigung
dazu besitzen.
!AVERTISSEMENT
Ce manual est destinéuniquement aux personnes compétentes en charge de l’entretien.Afin
de réduire les risques de décharge électrique, d’incendie ou de blessure n’effectuer que les
réparations indiquées dans le mode d’emploi àmoins d’être qualifiépour en effectuer d’autres.
Pour toute réparation faire appel àune personne compétente uniquement.

1
PVM-14L5/20L5/D14L5A/D20L5A
Table of Contents
1. Service Informations
1-1. Board Layout (14 inch) ...............................................................................1-1
1-2. Disassembly (14 inch).................................................................................1-1
1-2-1. Top Cover Removal (14 inch)....................................................1-1
1-2-2. Bezel Assy Removal (14 inch)...................................................1-2
1-2-3. H1 Board Removal (14 inch) .....................................................1-2
1-2-4. H2 Board Removal (14 inch) .....................................................1-3
1-2-5. J , D1, D2 and D Boards Removal (14 inch) .............................1-3
1-2-6. C Board Removal (14 inch) .......................................................1-4
1-2-7. B Block Assy Removal (14 inch)...............................................1-4
1-2-8. K, T, B1, M and B Boards Removal (14 inch) ..........................1-5
1-2-9. Q Block Assy Removal (14 inch) ..............................................1-5
1-2-10. Removal of Anode Cap ..............................................................1-6
1-2-11. G Board Removal (14 inch) .......................................................1-6
1-2-12. Picture Tube Removal (14 inch) ................................................1-7
1-2-13. Speaker Removal (14 inch) ........................................................1-8
1-2-14. Service Position (14 inch) ..........................................................1-8
1-3. Board Layout (20 inch) ...............................................................................1-9
1-4. Disassembly (20 inch)...............................................................................1-10
1-4-1. Top Cover Removal (20 inch)..................................................1-10
1-4-2. Bezel Assy Removal (20 inch).................................................1-10
1-4-3. HA Board Removal (20 inch) ..................................................1-11
1-4-4. HB Board Removal (20 inch) ..................................................1-11
1-4-5. J, D1, D2 and D Boards Removal (20 inch) ............................1-12
1-4-6. C Board Removal (20 inch) .....................................................1-12
1-4-8. K, T, B1, M and B Boards Removal (20 inch) ........................1-13
1-4-7. B Block Removal (20 inch)......................................................1-13
1-4-9. Q Block Assy Removal (20 inch) ............................................1-14
1-4-10. Removal of Anode Cap ............................................................1-14
1-4-11. G Board Removal (20 inch) .....................................................1-15
1-4-12. Picture Tube Removal (20 inch) ..............................................1-15
1-4-13. Speaker Removal (20 inch) ......................................................1-16
1-4-14. Service Position (20 inch) ........................................................1-16
2. Set-up Adjustment
2-1. Equipment Required....................................................................................2-1
2-2. Preparations (1) ...........................................................................................2-1
2-3. Preparation (2). Initialization ...................................................................2-16
2-4. Writing Model Data ..................................................................................2-17
2-5. Picture Output ...........................................................................................2-17
2-6. Free-run Frequency Adjustment ...............................................................2-17

2PVM-14L5/20L5/D14L5A/D20L5A
2-7. Landing Adjustment..................................................................................2-18
2-8. H Blanking Adjustment.............................................................................2-19
2-9. Linearity Adjustment ................................................................................2-20
2-10. Convergence Adjustment (1) ....................................................................2-21
2-11. Deflection Yoke Neck Rotation Adjustment ............................................2-22
2-12. Convergence Adjustment (2) ....................................................................2-22
2-13. G2 Adjustment ..........................................................................................2-23
2-14. White Balance Adjustment (15k)..............................................................2-23
2-15. White Balance Adjustment (33k)..............................................................2-24
2-16. SUB BRIGHT, SUB CONTRAST Adjustment (15 K) ............................2-24
2-17. SUB BRIGHT, SUB CONTRAST Adjustment (33 K) ............................2-25
2-18. White Balance Interference Correction Adjustment .................................2-25
2-18-1. NTSC Composite Adjustment..................................................2-25
2-18-2. PAL Composite Adjustment ....................................................2-25
2-18-3. COMPONENT Adjustment .....................................................2-25
2-18-4. SDI Adjustment........................................................................2-25
2-18-5. HD and SDI Adjustments.........................................................2-26
2-19. Focus Adjustment......................................................................................2-26
3. Safety Related Adjustment
3-1. High Tension Regulator Confirmation........................................................3-2
3-2. Protection Circuit Confirmation..................................................................3-2
3-2-1. HV Protector Circuit Confirmation............................................3-2
3-2-2. 1K Protector Circuit Confirmation.............................................3-2
4. Electrical Adjustments
4-1. Equipment Required....................................................................................4-1
4-2. B Board Adjustments ..................................................................................4-2
4-2-1. Preparations................................................................................4-2
4-2-2. 15k YPBPR SMPTE (601) Signal Adjustment..........................4-3
4.2-2-1. Black Level Adjustment.............................................................4-3
4-2-2-2. CHROMA Leak Adjustment......................................................4-4
4-2-2-3. MATRIX Adjustment ................................................................4-4
4-2-3. 15k YPBPR BETACAM SETUP 0 Signal Adjustment ............4-5
4-2-4. 15k YPBPR BETACAM SETUP 7.5 Signal Adjustment .........4-5
4-2-5. 33 k YPBPR SMPTE (709) Signal Adjustment.........................4-6
4-3. B1 Board Adjustments ................................................................................4-8
4-3-1. Preparation .................................................................................4-8
4-3-2. Y OUT Level Adjustment (BYPASS Mode) .............................4-9
4-3-3. Clamp Pulse Width Adjustment (NTSC) ...................................4-9
4-3-4. Burst Gate Pulse Width Adjustment (NTSC) ............................4-9

3
PVM-14L5/20L5/D14L5A/D20L5A
4-3-5. 3.58 f0 Adjustment (NTSC) .......................................................4-9
4-3-6. Phase Adjustment (NTSC) .........................................................4-9
4-3-7. Level Adjustment (NTSC) .......................................................4-10
4-3-8. Burst Gate Pulse Width Adjustment (PAL) .............................4-10
4-3-9. 4.43 f0 Adjustment (PAL)........................................................4-10
4-3-10. PAL B-Y PHASE Adjustment .................................................4-10
4-3-11. PAL PHASE Adjustment (Normal) .........................................4-11
4-3-12. Level Adjustment (PAL)..........................................................4-11
4-3-13. Level Adjustment (NTSC 443) ................................................4-11
4-3-14. Clamp Pulse Width Adjustment (SECAM) .............................4-12
4-3-15. H. Pulse Width Adjustment (SECAM) ....................................4-12
4-3-16. Level Adjustment (SECAM)....................................................4-12
5. Theory of Operation
5-1. B Board .......................................................................................................5-1
5-2. BI Board ......................................................................................................5-3
5-3. C Board .......................................................................................................5-4
5-4. Deflection Circuit and High Tension Circuit ..............................................5-5
5-7. Power Supply Circuit ..................................................................................5-7
6. Semiconductors................................................................................. 6-1
7. Spare Parts
7-1. Notes on Repair Parts..................................................................................7-1
7-2. Exploded Views ..........................................................................................7-2
7-3. Electrical Parts List ...................................................................................7-11
8. Block Diagrams
Overall (1/2) ................................................................................................8-1
Overall (2/2) ................................................................................................8-2
Q (1/2), B (1/5), T (1/2), K..........................................................................8-3
B (2/5) .........................................................................................................8-4
B (3/5) .........................................................................................................8-5
Q (2/2), B (4/5, 5/5), M, T (2/2), H1 (14L)/HA (20L), H2 (14L)/HB (20L) ... 8-6
B1 ................................................................................................................8-7
C, D, D1, D2, DY........................................................................................8-8
G, J ..............................................................................................................8-9

4PVM-14L5/20L5/D14L5A/D20L5A
9. Diagrams
9-1. Frame Schematic Diagram ..........................................................................9-3
Frame...........................................................................................................9-3
9-2. Schematic Diagrams and Printed Wiring Boards........................................9-4
Schematic Diagrams
Q (1/2) .........................................................................................................9-5
Q (2/2) .........................................................................................................9-6
T ..................................................................................................................9-8
B (1/5) .......................................................................................................9-11
B (2/5) .......................................................................................................9-12
B (3/5) .......................................................................................................9-13
B (4/5) .......................................................................................................9-14
B (5/5) .......................................................................................................9-15
B1 (1/2) .....................................................................................................9-21
B1 (2/2) .....................................................................................................9-22
M ...............................................................................................................9-24
H1 ..............................................................................................................9-25
H2 ..............................................................................................................9-27
HA .............................................................................................................9-29
HB .............................................................................................................9-30
K ................................................................................................................9-31
C ................................................................................................................9-33
X ................................................................................................................9-34
J .................................................................................................................9-35
D ................................................................................................................9-37
D2 ..............................................................................................................9-37
D1 ..............................................................................................................9-39
G (1/2) .......................................................................................................9-42
G (2/2) .......................................................................................................9-43
Printed Wiring Boards
Q ..................................................................................................................9-4
T ..................................................................................................................9-7
B ................................................................................................................9-16
B1 ..............................................................................................................9-20
M ...............................................................................................................9-23
H1 ..............................................................................................................9-23
H2 ..............................................................................................................9-26
HA .............................................................................................................9-28
HB .............................................................................................................9-28
K ................................................................................................................9-31
C ................................................................................................................9-32
X ................................................................................................................9-34
J .................................................................................................................9-35
D2 ..............................................................................................................9-35
D ................................................................................................................9-36
D1 ..............................................................................................................9-38
G ................................................................................................................9-40

1-1
PVM-14L5/20L5/D14L5A/D20L5A
Section 1
Service Informations
1-1. Board Layout (14 inch)
M
X
D1
B1
B
D
C
Q
G
H1
H2
J
K
D2
T
1-2. Disassembly (14 inch)
1-2-1. Top Cover Removal (14 inch)
1Three screws
(claw case screw (OS))
2Three screws
(claw case screw (OS))
Top cover
Rear cover
4
3Two screws
(+BVTT 4 x8)

1-2 PVM-14L5/20L5/D14L5A/D20L5A
1-2-2. Bezel Assy Removal (14 inch)
3Two screws (+B 3 x8)
6Two claws
5Shaft switch
4
2Two screws
(+B 3 x8)
10 pin
X board
9 pin
7 pin
9 pin
5 pin
CN105
CN900
Bezel assy
1Power button
1-2-3. H1 Board Removal (14 inch)
4Four claws
5Three
claws
6Four claws
1Two screws
(+BVTP 3 x12)
3Screw (+BVTP 3 x12)
2Two wire holders
CN2903
CN2902
CN2901
H1 board

1-3
PVM-14L5/20L5/D14L5A/D20L5A
1-2-4. H2 Board Removal (14 inch)
3Four claws
4Four claws
5Four
claws
1Screw (+BVTP 3 x12)
CN5005
CN5002
CN5001
CN5004
H2 board
2Wire holder
1-2-5. J , D1, D2 and D Boards Removal (14 inch)
CN1501
CN706
CN1508
CN1506
CN1507 CN1502
CN1503
6Four screws
(+BVTP 3 x12) D board
5Screw (+BVTT 4 x8)
CN2502 (board to board)
4D1 board
CN2501 (board to board)
1Two screws
(+PSW 3 x8)
2Insulator (J PWB)
3J board
CN951
9Bracket D
8D2 board
7Four card edge
spacers

1-4 PVM-14L5/20L5/D14L5A/D20L5A
1-2-6. C Board Removal (14 inch)
CN705 CN704
CN702
CN701
CN703
C board
1-2-7. B Block Assy Removal (14 inch)
CN101
CN1906
CN1908
B block assy
CN2401
CN1905
CN1904
CN1903
CN1907
CN102
CN103
CN104
3Screw (+PSW 4 x8)
2Three screws (+BVTP 3 x12)
1Screw (+BVTP 3 x8)

1-5
PVM-14L5/20L5/D14L5A/D20L5A
1-2-8. K, T, B1, M and B Boards Removal (14 inch)
CN801
CN113
CN107 (board to board)
CN108 (board to board)
CN201
CN3802
CN3801
9Four screws (+BVTT 3 x8)
T board
1Three PWB
holders
2K board
7Four screws
(+BVTP 3 x12)
4Two PWB
holders
3Two PWB holders
5B1 board
6M board
8B board
CN1901 (board to board)
CN3504
CN3505
CN3503
CN3502
CN3501
1-2-9. Q Block Assy Removal (14 inch)
CN2704
CN601
CN2706
CN2705
CN2707
CN2710
4Two screws
(+PSW 3 x12)
2Four claws
1Screw (+PSW 4 x8)
3Screw (+PSW 4 x8)
6Connector label
5Plug holder (A)
7AC inlet 3p (with noise filter)
8Q block assy

1-6 PVM-14L5/20L5/D14L5A/D20L5A
1-2-11.G Board Removal (14 inch)
4Two screws (+PSW 4 x8)
6G shield
5G board
CN602
CN603
CN610
CN609
CN604
CN608
CN608
CN607
CN503
CN606
CN607
CN508
CN505
1Anode cap
2Open the lead holder in the
direction of the arrow.
3Screw (+BVTP 3 x16)
(1) Turn up one side of the rubber cap in the
direction indicated by arrow a.(2) Using a thumb, pull up the rubber cap firmly in the direction indicated by
arrow b.
(3) When 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 up it in
the direction of the arrow c.
1-2-10.Removal of Anode Cap
n
Short-circuit the anode of the picture tube and the anode cap to the metal chassis, picture tube shield or carbon painted on
the picture tube, after removing the anode.
..
..
.Removal Procedure
..
..
.Handling Precautions
(1) Do not scratch the surface of anode cap with a sharp object.
(2) Do not press the rubber so hard that it damages the inside of
anode caps. A shatter-hook terminal is built into the rubber.
(3) Do not turn the foot of the rubber over.
The shatter-hook terminal will stick out or damage the rubber.
a
a
b
b
c
Anode button

1-7
PVM-14L5/20L5/D14L5A/D20L5A
1-2-12. Picture Tube Removal (14 inch)
4Two nuts (flange nut (B) M5)
6Two nuts (flange nut (B) M5)
5Two washers
(CRT position washer)
1Fastening band assy
2DY shield
7Picture tube
3Deflection yoke

1-8 PVM-14L5/20L5/D14L5A/D20L5A
1-2-13.Speaker Removal (14 inch)
2Four speaker cushions
3Speaker
1Four screws (step screw M3 x4)
1-2-14.Service Position (14 inch)
CN603
G board
J board
Q board
*Because there exist the portions that have the high tension voltage,
be careful that the printed boards must not touch each other
nor must not touch with the chassis.

1-9
PVM-14L5/20L5/D14L5A/D20L5A
1-3. Board Layout (20 inch)
MX
D1
B1
B
D
C
Q
G
T
HA
HB
K
J
D2

1-10 PVM-14L5/20L5/D14L5A/D20L5A
1-4. Disassembly (20 inch)
1-4-1. Top Cover Removal (20 inch)
4
1Three screws
(claw case screw (OS))
2Three screws
(claw case screw (OS))
3Four screws
(+BVTT 4 x8)
Top cover
Rear cover
1-4-2. Bezel Assy Removal (20 inch)
10 pin
10 pin
5 pin
9 pin
7 pin
2Two screws
(+B 3 x8)
3Two screws (+B 3 x8)
5Shaft switch
1Power button
6Two claws
4
CN900
CN105
X board
Bezel assy

1-11
PVM-14L5/20L5/D14L5A/D20L5A
1-4-3. HA Board Removal (20 inch)
1Three screws
(+BVTP 3 x12)
2Two wire holders
CN2902
CN2901
3Four claws
4Three
claws
5Four claws
HA board
1-4-4. HB Board Removal (20 inch)
3Control label (L) CN5005
CN5002
CN5001
CN5004
4Four claws
5Four
claws
6Four
claws 1Four screws
(+BVTP 3 x12)
HB board
2Three wire holders

1-12 PVM-14L5/20L5/D14L5A/D20L5A
1-4-6. C Board Removal (20 inch)
CN702
CN701
CN704 C board
1-4-5. J, D1, D2 and D Boards Removal (20 inch)
CN1501
CN1508
CN1506
CN1507
CN1502
CN1503
CN2502 (board to board)
CN2501 (board to board)
CN951
6Four screws
(+BVTP 3 x12) D board
5Screw
(+BVTT 4 x8)
4D1 board
1Two screws
(+PSW 3 x8)
2Insulator (J PWB)
3J board
9 pin
9Bracket D
8D2 board
7Four card edge
spacers

1-13
PVM-14L5/20L5/D14L5A/D20L5A
1-4-7. B Block Assy Removal (20 inch)
CN101
CN1906
CN1908 CN2401
CN1905
CN1904
CN1903
CN1907
CN102
CN103
CN104
3Screw (+PSW 4 x8)
2Three screws
(+BVTP 3 x12)
B block assy
1Screw (+BVTT 4 x8)
CN801
CN113
CN107 (board to board)
CN108 (board to board)
CN201
CN3802
CN3801
9Four screws (+BVTT 3 x8)
T board
1Three PWB
holders
2K board
7Four screws
(+BVTP 3 x12)
4Two PWB
holders
3Two PWB holders
5B1 board
6M board
8B board
CN1901 (board to board)
CN3504
CN3505
CN3503
CN3502 CN3501
1-4-8. K, T, B1, M and B Boards Removal (20 inch)

1-14 PVM-14L5/20L5/D14L5A/D20L5A
(1) Turn up one side of the rubber cap in the
direction indicated by arrow a.(2) Using a thumb, pull up the rubber cap firmly in the direction indicated by
arrow b.
(3) When 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 up it in
the direction of the arrow c.
1-4-10.Removal of Anode Cap
n
Short-circuit the anode of the picture tube and the anode cap to the metal chassis, picture tube shield or carbon painted on
the picture tube, after removing the anode.
..
..
.Removal Procedure
..
..
.Handling Precautions
(1) Do not scratch the surface of anode cap with a sharp object.
(2) Do not press the rubber so hard that it damages the inside of
anode caps. A shatter-hook terminal is built into the rubber.
(3) Do not turn the foot of the rubber over.
The shatter-hook terminal will stick out or damage the rubber.
a
a
b
b
c
Anode button
1-4-9. Q Block Assy Removal (20 inch)
CN2704
CN601
CN2706
CN2705
CN2707
CN2710
4Two screws
(+PSW 3 x12)
2Four claws
1Screw (+PSW 4 x8) 3Screw (+PSW 4 x8)
6Connector label
5Plug holder (A)
7AC inlet 3p (with noise filter)
8Q block assy