Sony PVM-14L1 User manual

TRINITRON®COLOR VIDEO MONITOR
PVM-14L1
PVM-14L1MDE
PVM-20L1
SSM-14L1
SSM-20L1
SERVICE MANUAL
1st Edition (Revised 1)

PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
!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 destiné uniquement 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 à moins d’être qualifié pour en effectuer d’autres.
Pour toute réparation faire appel à une personne compétente uniquement.
WARNING!!
AN INSULATED TRANSFORMER SHOULD BE USED DURING
ANY SERVICE TO AVOID POSSIBLE SHOCK HAZARD, BE-
CAUSE OF LIVE CHASSIS.
THE CHASSIS OFTHIS RECEIVER IS DIRECTLY CONNECTED
TOTHE AC POWER LINE.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BYA !!
!!
!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.
FOLLOWTHESE PROCEDURESWHENEVER 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 UTILISÉ LORS
DETOUT 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,LESVUES 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
NUMÉRODEPIÈCEESTINDIQUÉDANSLE PRÉSENT MANUEL
OU DANS DES SUPPLÉMENTS PUBLIÉS PAR SONY. LES
RÉGLAGESDECIRCUIT DONT L’IMPORTANCE EST CRITIQUE
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.
.Equipment energized from an external electrical power source :
Class I Equipment
.Degree of protection against electric shock :
No applied part
.Mode of operation :
Continuous operation

1
PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
Table of Contents
1. Service Overview
1-1. Appearance Figure (14 inch).......................................................................1-1
1-2. Board Locations (14 inch)...........................................................................1-1
1-3. Disassembly (14 inch).................................................................................1-2
1-3-1. Cabinet and Rear Panel (14 inch)...............................................1-2
1-3-2. Q Block Assembly and Q Board (14 inch) ................................1-3
1-3-3. A Board Assembly (14 inch)......................................................1-4
1-3-4. C Board (14 inch).......................................................................1-4
1-3-5. Picture Tube and Bezel Complete Assembly (14 inch) .............1-5
1-3-6. Anode Cap (14 inch) ..................................................................1-6
1-4. Appearance Figure (20 inch).......................................................................1-7
1-5. Board Locations (20 inch)...........................................................................1-7
1-6. Disassembly (20 inch).................................................................................1-8
1-6-1. Cabinet and Rear Panel (20 inch)...............................................1-8
1-6-2. Q Block Assembly and Q Board (20 inch) ................................1-9
1-6-3. A Board (20 inch).....................................................................1-10
1-6-4. C Board (20 inch).....................................................................1-10
1-6-5. Picture Tube and Bezel Complete Assembly (20 inch) ...........1-11
1-6-6. Anode Cap (20 inch) ................................................................1-12
1-7. Warning on Power Connection .................................................................1-12
2. Set-up Adjustment
2-1. Equipment Required....................................................................................2-1
2-2. Preparations (1) ...........................................................................................2-1
2-3. Preparation (2). Initialization .....................................................................2-6
2-4. Writing Model Data ....................................................................................2-6
2-5. Picture Output .............................................................................................2-6
2-6. Landing Adjustment (1) ..............................................................................2-6
2-7. Deflection Yoke Neck Rotation Adjustment ..............................................2-8
2-8. Convergence Adjustment (1) ......................................................................2-9
2-9. Convergence Adjustment (2) ....................................................................2-10
2-10. Landing Adjustment (2) ............................................................................2-10
2-11. Focus Adjustment......................................................................................2-10
2-12. White Balance Adjustment .......................................................................2-11
2-12-1. Sub Bright Adjustment.............................................................2-11
2-12-2. White Balance Adjustment [D65] ............................................2-11
2-12-3. White Balance Adjustment [D93] ............................................2-11
2-13. Deflection Adjustment ..............................................................................2-12
2-13-1. 525 Vertical Deflection Adjustment ........................................2-12
2-13-2. 625 Vertical Deflection Adjustment ........................................2-13
2-14. Horizontal Deflection Adjustment ............................................................2-13
2-14-1. 525 Horizontal Deflection Adjustment ....................................2-13
2-14-2. 625 Horizontal Deflection Adjustment ....................................2-14

2PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
2-15. Sub Contrast Adjustment ..........................................................................2-14
2-16. Adjustment of NTSC Mode ......................................................................2-15
2-16-1. NTSC Composite Input ............................................................2-15
2-16-2. NTSC Y/C Input ......................................................................2-15
2-17. Adjustment of PAL Mode .........................................................................2-15
2-17-1. PAL Composite Input ..............................................................2-15
2-17-2. PAL Y/C Input .........................................................................2-15
3. Safety Related Adjustment
3-1. +B Voltage Check ......................................................................................3-1
3-2. Protection Circuit Confirmation..................................................................3-1
3-2-1. HV Protector Circuit Confirmation............................................3-1
4. Semiconductors................................................................................. 4-1
5. Spare Parts
5-1. Notes on Repair Parts..................................................................................5-1
5-2. Exploded Views ..........................................................................................5-2
5-3. Electrical Parts List ...................................................................................5-10
6. Block Diagrams
Q, A (1/2), C ...........................................................................................................6-1
A (2/2), DY.............................................................................................................6-2
7. Diagrams
7-1. Frame Schematic Diagram ..........................................................................7-2
Frame ........................................................................................................7-2
7-2. Schematic Diagrams and Board Layouts ....................................................7-3
Schematic Diagrams
Q................................................................................................................7-4
A (1/3) .......................................................................................................7-5
A (2/3) .......................................................................................................7-6
A (3/3) .......................................................................................................7-7
C (14 Inch) ..............................................................................................7-12
C (20 Inch) ..............................................................................................7-14
Board Layouts
Q................................................................................................................7-3
A................................................................................................................7-8
C (14 Inch) ..............................................................................................7-11
C (20 Inch) ..............................................................................................7-13

1-1
PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
Section 1
Service Overview
1-1. Appearance Figure (14 inch)
1-2. Board Locations (14 inch)
C
A
Q

1-2 PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
1-3. Disassembly (14 inch)
1-3-1. Cabinet and Rear Panel (14 inch)
A
B
1 Six nylon rivets
2
Two case claw screws
(M 4 x 8)
3
Two case claw screws
(M 4 x 8)
5Four screws
(+BVTP 4 x 16)
6Remove the rear panel
in the direction of the arrow B.
4Remove the cabinet
in the direction of the arrow A.

1-3
PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
1-3-2. Q Block Assembly and Q Board (14 inch)
.Remove the cabinet and rear panel. (Refer to 1-3-1.)
A
A
B
CN204
CN201
CN601
1 Four screws
(+PS 4 x 8)
3
Q block assembly
4
Connector label
5Two screws
(+PSW 3 x 10)
6
Connector panel
7Two screws
(+PSW 3 x 10)
8AC inlet
9Q board
Push the two areas in the bottom of beznet in the direction of arrow A,
and pull the Q block assembly in the direction of the arrow B.

1-4 PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
1-3-3. A Board Assembly (14 inch)
.Remove the cabinet and rear panel. (Refer to 1-3-1.)
1-3-4. C Board (14 inch)
.Remove the cabinet and rear panel. (Refer to 1-3-1.)
CN501
CN602
CN502
CN3502
CN002
A
3 Remove the A board
in the direction of the arrow
A .
4 Power switch button
2 Anode cap
1 Open the lead holder.
CN701
CN730
CN720
CN721
CN722
1 C board

1-5
PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
1-3-5. Picture Tube and Bezel Complete Assembly (14 inch)
.Remove the cabinet and rear panel. (Refer to 1-3-1.)
.Remove the Q block assembly. (Refer to 1-3-2.)
.Remove the A board. (Refer to 1-3-3.)
.Remove the C board. (Refer to 1-3-4.)
B
B
A
Note:
Prepare a work bench that can protect surface
of CRT and can withstand the weight of the CRT.
1Deflection yoke
Cushion
2
Prepare a work bench on the cushion
and place the CRT and bezel assembly
on the work bench.
Cushion
Bench
3Four self tapping screws (M5)
4Remove the CRT shield assembly
in the direction of the arrow A.
6Picture tube
5Remove the bezel complete assembly
in the direction of the arrow B.
Cushion

1-6 PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
(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.
1-3-6. Anode Cap (14 inch)
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-14L1/14L1MDE/20L1
SSM-14L1/20L1
1-4. Appearance Figure (20 inch)
1-5. Board Locations (20 inch)
C
A
Q

1-8 PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
1-6. Disassembly (20 inch)
1-6-1. Cabinet and Rear Panel (20 inch)
1 Six nylon rivets
2
Two case claw screws
(M 4 x 8)
3
Two case claw screws
(M 4 x 8)
5Four screws
(+BVTP 4 x 16)
A
B
6Remove the rear panel
in the direction of the arrow B.
4Remove the cabinet
in the direction of the arrow A.

1-9
PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
1-6-2. Q Block Assembly and Q Board (20 inch)
.Remove the cabinet and rear panel. (Refer to 1-6-1.)
Push the two areas in the bottom of beznet in the direction of arrow A,
and pull the Q block assembly in the direction of the arrow B.
3
Q block assembly
4
Connector label
6
Connector panel
1
Four screws
(+PS 4 x 8)
5Two screws
(+PSW 3 x 10)
7Two screws
(+PSW 3 x 10)
8AC inlet
9Q board
A
A
B
CN204
CN201
CN601

1-10 PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
1-6-4. C Board (20 inch)
.Remove the cabinet and rear panel. (Refer to 1-6-1.)
CN701
CN710
CN720
CN721
CN722
1 C board
1-6-3. A Board (20 inch)
.Remove the cabinet and rear panel. (Refer to 1-6-1.)
A4Remove the A board
in the direction of the arrow A.
1PWB holder
2Anode cap
3Focus lead assembly
CN501
CN602
CN502
CN3502
CN002
5 Power switch button

1-11
PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
1-6-5. Picture Tube and Bezel Complete Assembly (20 inch)
.Remove the cabinet and rear panel. (Refer to 1-6-1.)
.Remove the Q block assembly. (Refer to 1-6-2.)
.Remove the A board. (Refer to 1-6-3.)
.Remove the C board. (Refer to 1-6-4.)
1Deflection yoke
Cushion
B
B
A
2
Prepare a work bench on the cushion
and place the CRT and bezel assembly
on the work bench.
Cushion
Bench
Note:
Prepare a work bench that can protect surface
of CRT and can withstand the weight of the CRT.
3Four self tapping screws (M5)
4Remove the CRT shield assembly
in the direction of the arrow A.
5Remove the bezel complete assembly
in the direction of the arrow B.
Cushion
6Picture tube

1-12 PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
(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.
1-6-6. Anode Cap (20 inch)
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. Warning on Power Connection
Use a proper power cord for your local power supply.
United State, Canada Europe Japan
Plug type LP-30B ––a) YP332
Female end LS-13 VM0303B YC-35
Cord type SB-SVT H05VV-F VCTF
Minimum cord set rating 10A/125V 10A/250V 7A/125V
Safety approval UL/CSA SEMKO, NEMKO, DEMKO, SEV, DENAN-HO
KEMA, EI (FIMKO), CEBEC, VDE, BS
a) Note : Use an appropriate rating plug which is applied to local regulations.

2-1
PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
Section 2
Set-up Adjustment
2-1. Equipment Required
.Oscilloscope
Tektronix 2465 or equivalent (with bandwidth of 350
MHz)
.VG (programmable video signal generator)
VG-854 or equivalent
.Digital VOM
Advantest TR6845 or equivalent
.Slide induction transformer
.DC power supply
n
Start the following adjustments 5 minutes after the main
power is turned on.
* In this chapter, [||||||] indicates the control items in the
service mode.
Example : [60|H-FREQ]
2-2. Preparations (1)
Service Mode
This set is provided with a switch for service on the front
panel that can be used to make various adjustments. The
operation method of this switch is explained in detail below.
1. Entering the service mode
Simultaneously press the [ENTER] key and the
[MENU] key shown on the display of the menu 3
seconds or more.
2. Operating the Service Mode
Select the desired service item with the [9], [0] key
and press the [ENTER] key to enter the adjustment
mode.
Press the [+] key to increase the adjustment value.
Press the [_] key to decrease the adjustment value.
Press the [ENTER] key to save the adjustment value.
Press the [MENU] key to cancel the entry.
3. Finishing the service mode
Simultaneously press the [ENTER] key and the
[MENU] key shown on the display of the menu 3
seconds or more.
SIGNAL
SIG
•LEVEL...
•WHITE BALANCE...
DEF
DES
SYS
ENG

2-2 PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
4. Executing FACTORY LOAD
If the adjustment data is damaged or lost by some
reasons, you can restore the default factory adjustment
data by executing FACTORY LOAD as described
below.
Select the following sub menus from the Service Menu
in the order of : [SYSTEM] →[FACTORY...] →
[LOAD...] to read the default factory data. If the
default factory data is damaged or the ROM is re-
placed without executing FACTORY SAVE as
described in the following paragraph, you cannot
execute FACTORY LOAD.
5. Executing FACTORY SAVE
This operation is to write the FACTORY LOAD data
into the factory data area in the memory.
Select the following sub menus from the Service Menu
in the order of : [SYSTEM] →[MAINTENANCE ID]
and type 111. Then select the following sub menus
from the Service Menu in the order of : [ENGINEER]
→[FACTORY SAVE] to write the factory data in the
memory. FACTORY SAVE is protected from miss
operation so that FACTORY SAVE cannot be execut-
ed unless MAINTENANCE ID is set.
FACTORY SET
If the following circuit board is replaced or the following
IC on the respective board is replaced, perform the follow-
ing settings.
A board, IC001, IC003
1. Select the following sub menus from the Service Menu
in the order of : [SYSTEM]-[MAINTENANCE ID]
and type 111.
2. If the IC003 is replaced, select the following sub
menus from the Service Menu : [ENGINEER]-
[CLEAR NVM ON A] and write data.
3. Select the following sub menus from the Service
Menu in the order of : [SYSTEM]-[MODEL INCH],
[SYSTEM]-[MODEL TYPE] and write the model data
of each model in the [MODEL TYPE] referring to
table 2-2.
4. Perform all adjustment items of the [SIGNAL] menu
and of the [DEFLECTION] menu.
5. Upon completion of adjustment, select the menus
[ENGINEER]-[FACTORY SAVE] to save the
adjustment data.

2-3
PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
Service Mode screen display
SIGNAL
SIG
•LEVEL...
•WHITE BALANCE...
DEF
DES
SYS
ENG
LEVEL
SIG •SUB BRIGHT
•LUMI DELAY
•SUB CHROMA
•SUB PHASE
•PEAK FREQ
•SCO
•WHITE PEAK
•SUB SHARP
DEF
DES
SYS
ENG
4
11
3
6
0
0
0
15
WHITE BALANCE
•SUB CONTRAST
•CDL
•SUB BRIGHT
•COLOR TEMP
•ADJUST
•ADJUST GAIN...
•ADJUST BIAS...
9
4
4
D65
SIG
DEF
DES
SYS
ENG
DEFLECTION
SIG
•RASTER H...
•RASTER V...
•GEOMETRY...
DEF
DES
SYS
ENG
DEFLECTION
SIG •H SIZE
•LEFT H BLK
•RIGHT H BLK
•H POSITION
47
0
0
46
DEF
DES
SYS
ENG
RASTER H
DEFLECTION
SIG •V LINEARITY
•S CORRECTION
•PIN AMP
•PIN PHASE
•U CORNER PIN
•L CORNER PIN
•V ANGLE
•V BOW
30
11
57
0
19
37
32
29
DEF
DES
SYS
ENG
GEOMETRY
DEFLECTION
SIG •V SIZE
•V CENTER
•V SCROLL
•V SLOPE
•V ZOOM
45
45
13
31
31
DEF
DES
SYS
ENG
RASTER V

2-4 PVM-14L1/14L1MDE/20L1
SSM-14L1/20L1
DESIGN 1/2
SIG •COLOR DECODER 0...
•COLOR DECODER 1...
•AV SWITCH 0...
•AV SWITCH 1...
•SYNCHRONIZATION 0...
•SYNCHRONIZATION 1...
•DEFLECTION...
•SOUND 0...
DEF
DES
SYS
ENG
4
11
3
6
0
0
0
15
SYNCHRONIZATION 0
SIG •VID
•VIM
•STB
•POC
•F0AB
•HP2
•SDC
DEF
DES
SYS
ENG
0
0
1
0
3
0
0
SYNCHRONIZATION 1
SIG •NCIN
•DL
•FORFS
•OSO
•FSL
•STM
DEF
DES
SYS
ENG
0
0
2
1
0
0
DEFLECTION
SIG •HCO
•EVG
•AVG
•SBL
•XDT
•DFL
DEF
DES
SYS
ENG
0
1
0
0
1
1
•OSVE 0
SOUND 0
SIG •AVL
•SM
DEF
DES
SYS
ENG
0
0
COLOR DECODER 0
SIG •CB...
•ALC...
•MUS
•MAT
•CM 3210
DEF
DES
SYS
ENG
0
1
0
1
8
AV SWITCH 0
SIG •INABC
•CMB10
•STR
DEF
DES
SYS
ENG
3
1
0
AV SWITCH 1
SIG •CS2ABC
•CS1ABC
•FB0
DEF
DES
SYS
ENG
0
7
0
COLOR DECODER 1
SIG •FC0
•BPS
DEF
DES
SYS
ENG
0
0
n
When changing DESIGN ITEMS 1/2 and 2/2, set the MAINTENANCE ID to 111 in SYSTEM.