Sony PVM-20L2, PVM-14L2, PVM-9L2 Service Manual
TRINITRON® COLOR VIDEO MONITOR
PVM-14L2
PVM-20L2
SERVICE MANUAL
2nd Edition
Serial No. From 2100001 to 2199999: PVM-14L2 (SY)
Serial No. From 2600001 to 2699999: PVM-14L2 (AUS)
Serial No. From 6100001 to 6199999: PVM-14L2 (CH)
Serial No. From 2100001 to 2199999: PVM-20L2 (SY)
Serial No. From 2600001 to 2699999: PVM-20L2 (AUS)
Serial No. From 6100001 to 6199999: PVM-20L2 (CH)
! 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, BECAUSE OF LIVE CHASSIS.
THE CHASSIS OF THIS RECEIVER IS DIRECTLY CONNECTED
TO THE AC POWER LINE.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY A
DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS LIST ARE
CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE P ART NUMBERS APPEAR
AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY . CIRCUIT ADJUSTMENTS THAT ARE CRITICAL TO SAFE OPERATION ARE IDENTIFIED IN THIS MANU AL.
FOLLOW THESE PROCEDURES WHENEVER CRITICAL COMPONENTS ARE REPLACED OR IMPROPER OPERATION IS
SUSPECTED.
!!
! MARK ON THE SCHEMA TIC
!!
ATTENTION!!
AFIN D’ÉVITER TOUT RISQUE D’ÉLECTROCUTION
PROVENANT D’UN CHÂSSIS SOUS TENSION, UN
TRANSFORMA TEUR D’ISOLEMENT DOIT ETRE UTILISÉ LORS
DE TOUT DÉPANNA GE.
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
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’IMPORT ANCE 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.
PVM-14L2/20L2
!!
! SUR
!!
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. Top Cover Assembly and Rear Cover (14 inch) ........................1-2
1-3-2. B Board (14 inch)....................................................................... 1-3
1-3-3. Q Board (14 inch).......................................................................1-4
1-3-4. G and Q Block Assemblies (14 inch).........................................1-5
1-3-5. G Board (14 inch).......................................................................1-5
1-3-6. C Board and Deflection Yoke (14 inch) ....................................1-6
1-3-7. Picture Tube (14 inch)................................................................1-6
1-3-8. H, J and X Boards (14 inch) ...................................................... 1-7
1-3-9. Anode Cap (14 inch) .................................................................. 1-7
1-4. Appearance Figure (20 inch)......................................................................1-8
1-5. Board Locations (20 inch)..........................................................................1-8
1-6. Disassembly (20 inch).................................................................................1-9
1-6-1. Top Cover and Rear Cover (20 inch) .........................................1-9
1-6-2. B Board (20 inch)..................................................................... 1-10
1-6-3. Q Board (20 inch).....................................................................1-11
1-6-4. G and Q Block Assemblies (20 inch).......................................1-12
1-6-5. G Board (20inch)......................................................................1-12
1-6-6. C Board and Deflection Yoke (20 inch) ..................................1-13
1-6-7. Picture Tube (20 inch)..............................................................1-14
1-6-8. J and H Boards (20 inch)..........................................................1-15
1-6-9. Anode Cap (20 inch) ................................................................ 1-16
1-7. Warning on Power Connection .................................................................1-16
PVM-14L2/20L2
2. Set-up Adjustment
2-1. Equipment Required....................................................................................2-1
2-2. Preparations (1) ...........................................................................................2-1
2-3. Preparation (2). Initialization ..................................................................... 2-7
2-4. Writing Model Data ....................................................................................2-7
2-5. Picture Output .............................................................................................2-7
2-6. Free-run Frequency Adjustment .................................................................2-8
2-7. Landing Adjustment....................................................................................2-8
2-8. Focus Adjustment......................................................................................2-10
2-9. Convergence Adjustment (1) ....................................................................2-10
2-10. Deflection Yoke Neck Rotation Adjustment ............................................2-11
2-11. Convergence Adjustment (2) ....................................................................2-12
2-12. H Blanking Adjustment.............................................................................2-13
2-13. V BLK Adjustment ................................................................................... 2-13
1
2-14. Deflection Adjustment .............................................................................. 2-14
2-15. G2 Adjustment .......................................................................................... 2-15
2-16. White Balance Adjustment .......................................................................2-16
2-17. SUB BRIGHT, SUB CONTRAST Adjustment........................................2-16
2-18. White Balance Interference Correction Adjustment .................................2-17
2-18-1. NTSC Composite Adjustment..................................................2-17
2-18-2. PAL Composite Adjustment ....................................................2-17
2-18-3. COMPONENT Adjustment .....................................................2-17
2-18-4. SDI Adjustment........................................................................2-17
3. Safety Related Adjustment
3-1. +B Voltage Check .......................................................................................3-1
3-2. High Tension Regulator Confirmation........................................................3-2
3-3. Protection Circuit Confirmation..................................................................3-2
3-3-1. HV 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. NTSC SETUP 0 Mode Adjustment ...........................................4-3
4-2-2-1. Y/C Input...................................................................4-3
4-2-2-2. Composite Input ........................................................4-4
4-2-3. NTSC SETUP 7.5 Mode Adjustment ........................................4-4
4-2-3-1. Y/C Input...................................................................4-4
4-2-3-2. Composite Input ........................................................4-4
4-2-4. PAL Mode Adjustment ..............................................................4-5
4-2-4-1. Y/C Input...................................................................4-5
4-2-4-2. Composite Input ........................................................4-5
4-2-5. Y PBPR SMPTE (601) Signal Adjustment................................4-6
4-2-6. Y PBPR BETACAM SETUP 0 Signal Adjustment ..................4-6
4-2-7. Y PBPR BETACAM SETUP 7.5 Signal Adjustment ...............4-7
5. Theory of Operation
5-1. B Board .......................................................................................................5-1
5-2. Deflection and High Voltage Circuit ..........................................................5-3
5-3. Power Supply Circuit ..................................................................................5-4
6. Semiconductors................................................................................. 6-1
2
PVM-14L2/20L2
7. Spare Parts
7-1. Notes on Repair Parts..................................................................................7-1
7-2. Exploded Views .......................................................................................... 7-2
7-3. Electrical Parts List ................................................................................... 7-18
8. Block Diagrams
B (1/3), B1, Q (1/2), G (1/2)...................................................................................8-1
B (2/3), C, H (1/2) ..................................................................................................8-2
B (3/3), H (2/2), Q (2/2), X ....................................................................................8-3
G (2/2), J, DY .........................................................................................................8-4
9. Diagrams
9-1. Schematic Diagrams and Board Layouts ....................................................9-2
Schematic Diagrams
Q (1/2) ....................................................................................................... 9-3
Q (2/2) ....................................................................................................... 9-4
B (1/5) .......................................................................................................9-5
B (2/5) .......................................................................................................9-6
B (3/5) .......................................................................................................9-7
B (4/5) .......................................................................................................9-8
B (5/5) .......................................................................................................9-9
X................................................................................................................9-8
C (PVM-14L2)........................................................................................9-15
C (PVM-20L2)........................................................................................9-17
H..............................................................................................................9-19
J ...............................................................................................................9-19
G (1/4) ..................................................................................................... 9-22
G (2/4) ..................................................................................................... 9-23
G (3/4) ..................................................................................................... 9-24
G (4/4) ..................................................................................................... 9-25
Board Layouts
Q................................................................................................................9-2
B .............................................................................................................. 9-12
C (PVM-14L2)........................................................................................9-14
C (PVM-20L2)........................................................................................9-16
H..............................................................................................................9-18
J ...............................................................................................................9-18
X..............................................................................................................9-18
G..............................................................................................................9-20
PVM-14L2/20L2
3
1-1. Appearance Figure (14 inch)
Section 1
Service Overview
1-2. Board Locations (14 inch)
X
G
C
Q
B
PVM-14L2/20L2
H
J
1-1
1-3. Disassembly (14 inch)
1-3-1. Top Cover Assembly and Rear Cover (14 inch)
1
4 Remove the top cover assembly
in the direction of the arrow A.
3 Four case claw screws
(M 4x8)
A
Six nylon rivets
8 Remove the rear in the direction of the arrow B.
7
Three screws
(+BVTT 3x8)
5
B
Two screws
(+BVTT 4x8)
Five case claw screws
2
(M 4x8)
Two screws
6
(+BVTP 4x16)
1-2
PVM-14L2/20L2
1-3-2. B Board (14 inch)
. Remove the top cover assembly and rear cover. (Refer to 1-3-1.)
C board
Remove the B block assembly
3
in the direction of the arrow A.
CN701
A
4 Remove the harnesses
in the direction of the arrow B.
B
1
Screw (+PS 4x8)
2 Two screws
(+BVTT 4x8)
Four screws
5
(+BV 3x12)
CN102
CN450
CN452
CN454
CN106
CN231
CN230
CN103
CN105
CN104
6
B board
7 B bracket, Shield assembly and
Two blank panel assemblies
PVM-14L2/20L2
1-3
1-3-3. Q Board (14 inch)
. Remove the top cover assembly and rear cover. (Refer to 1-3-1.)
2
Screw
CN2705
3
Ground plate
4
Screw
CN2710
B
(+PSW 4x8)
CN2707
7 Two wire holders
Screw
1
Shield assembly
(+PS 4x8)
(+PS 4x8)
CN601
8 Remove the Q block assembly
in the direction of the arrow B.
Connector label
![
6
Two claws
A
5 Remove the G board, main bracket
in the direction of the arrow A.
Screw
9
(+PSW 4x8)
!- Plug holder (A)
0 Two screws
(+PSW 3x12)
1-4
!]
Q board
AC inlet 3P
!=
PVM-14L2/20L2
1-3-4. G and Q Block Assemblies (14 inch)
. Remove the top cover assembly and rear cover. (Refer to 1-3-1.)
CN1506
CN1502
3 T wo screws (M 4x8)
W/Washer
2 Anode cap
5 Screw
(+PS 4x8)
A
B
1 Open the lead holder in the
direction of the arrow A.
8 Three claws
4 Screw (M 4x8)
W/Washer
1-3-5. G Board (14 inch)
. Remove the G and Q block assemblies. (Refer to 1-3-4.)
3 Three screws
(+BV 3 x 12)
CN605
CN3502
CN607
6 Screw
(+PS 4x8)
CN510
7 Ground plate
CN602
CN608
9 Remove the G and Q block assemblies
in the direction of the arrow B.
5 Remove the G board
in the direction of the arrow.
PVM-14L2/20L2
4 Two claws
CN601
1
Ferrite clamp
2 T wo screws
(+PSW 4 x 8)
6 Q block assembly,
Main bracket
1-5
1-3-6. C Board and Deflection Yoke (14 inch)
. Remove the top cover assembly and rear cover. (Refer to 1-3-1.)
1 Three claws
D
eflection yoke
4
CN701
2 C board
CN704
CN705
CN703
3 Fastening band assembly
1-3-7. Picture Tube (14 inch)
. Remove the top cover assembly and rear cover. (Refer to 1-3-1.)
1
3
Remove the
d
eflection yoke
(Refer to 1-3-6.)
C board and
.
2
Remove the
Q block assemblies
(Refer to 1-3-4.)
Remove the
(Refer to 1-3-2.)
G and
B block assembly
.
4 Screw (M 4x8)
W/Washer
.
6
Two ferrite clamps
5 Two screws
(M 4x8)
W/Washer
7
Four tapping (ST) screws (5)
8
CRT shield
assembly
1-6
9 Bezel complete assembly,
Bottom cabinet assembly
Cushion
0
Picture tube
PVM-14L2/20L2
1-3-8. H, J and X Boards (14 inch)
. Remove the picture tube. (Refer to 1-3-7.)
6
(+BV 3x12)
7
H board
CN51
Six screws
4
Two screws
(+BV 3x12)
5 J board
CN011
3
X board
CN001
Tally cushion
1
CN52
Bezel assembly
2 Two claws
Bottom cabinet assembly
Cushion
1-3-9. 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
..
c
Anode button
a
b
b
a
(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.
..
. 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.
PVM-14L2/20L2
(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.
1-7
1-4. Appearance Figure (20 inch)
1-5. Board Locations (20 inch)
X
G
C
Q
B
1-8
H
J
PVM-14L2/20L2
1-6. Disassembly (20 inch)
1-6-1. Top Cover and Rear Cover (20 inch)
Three
3
(M 4x8)
4 Remove the top cover
in the direction of the arrow A.
case claw screws
A
1 Seven nylon rivets
8 Remove the rear cover
in the direction of the arrow B.
7
(+BVTT 3x8)
B
5
(+BVTT 4x8)
6 Two screws
(+BVTP 4x16)
Three screws
Two screws
2
Four
case claw screws
(M 4x8)
PVM-14L2/20L2
1-9
1-6-2. B Board (20 inch)
. Remove the top cover and rear cover. (Refer to 1-6-1.)
C board
CN701
4 Remove the harnesses
in the direction of the arrow B.
3
Remove the B block assembly
in the direction of the arrow A.
A
B
1
Screw (+PS 4x8)
2 Two screws
(+BVTT 4x8)
Four screws
5
(+BV 3x12)
CN102
CN450
CN452
CN454
CN106
CN231
CN230
CN103
CN105
CN104
6
B board
7 B bracket, Shield assembly and
Two blank panel assemblies
1-10
PVM-14L2/20L2
1-6-3. Q Board (20 inch)
. Remove the top cover and rear cover. (Refer to 1-6-1.)
Screw
CN2705
Earth plate
3
4
CN2710
B
Screw
1
Shield assembly
2
(+PS 4x8)
(+PS 4x8)
CN601
Screw
CN2707
(+PSW 4x8)
8 Remove the Q block assembly
in the direction of the arrow B.
7 Two wire holders
Connector label
![
6
Two claws
A
5 Remove the G board, main bracket
in the direction of the arrow A.
9
Screw
(+PSW 4x8)
!- Plug holder (A)
0 Two screws
(+PSW 3x12)
PVM-14L2/20L2
!]
Q board
!=
AC inlet 3P
1-11
1-6-4. G and Q Block Assemblies (20 inch)
. Remove the top cover and rear cover. (Refer to 1-6-1.)
8 Screw (M 4x8)
W/Washer
1
Open the two lead holders
in the direction of the arrow A.
A
2
Anode cap
5
Screw
(+PS 4x8)
CN1506
CN1502
CN605
CN3502
CN607
6 Screw
(+PS 4x8)
CN510
7 Earth plate
CN703
A
Three claws
9
1-6-5. G Board (20inch)
. Remove the G and Q block assemblies. (Refer to 1-6-4.)
3 Three screws
(+BV 3 x 12)
B
3 Focus lead
assembly
CN601
CN602
CN603
4 Remove the harness.
0 Remove the G and Q block assemblies
in the direction of the arrow B.
1
Ferrite clamp
5 Remove the G board
in the direction of the arrow.
1-12
2 T wo screws
(+PSW 4 x 8)
6 Q block assembly,
Main bracket
4 Two claws
PVM-14L2/20L2
1-6-6. C Board and Deflection Yoke (20 inch)
. Remove the top cover and rear cover. (Refer to 1-6-1.)
FBT assembly
D
eflection yoke
5
2 Three claws
CN701
CN703
CN705
1 Focus lead assembly
4
Fastening band assembly
CN702
3
C board
PVM-14L2/20L2
1-13
1-6-7. Picture Tube (20 inch)
. Remove the top cover and rear cover. (Refer to 1-6-1.)
1 Remove the B block assembly.
(Refer to 1-6-2.)
3 Remove the C board and
deflection yoke.
(Refer to 1-6-6.)
Cushion
2 Remove the G and
Q block assemblies.
(Refer to 1-6-4.)
4 Two screws (M 4x8)
W/Washer
7 Prepare a work bench on the cushion
and place the CRT and bezel
assembly on the work bench.
6 Two ferrite clamps
![ Tally cushion
CN001
!] X board
C
8 Four tapping (ST) screws (5)
B
9 Remove the CRT shield assembly
in the direction of the arrow B.
!- Picture tube
5 Two screws
(M 4x8)
W/Washer
Cushion
Bench
Note:
Prepare a work bench that can protect surface
of CRT and can withstand the weight of the CRT.
1-14
Cushion
!= Two dowels
D
0 Remove the bezel complete assembly and
Bottom cabinet assembly in the directions of the arrows CD.
PVM-14L2/20L2
1-6-8. J and H Boards (20 inch)
. Remove the top cover and rear cover. (Refer to 1-6-1.)
7 Screw (M 4x8)
W/Washer
CN1502
CN3502
CN605
1 Open the two lead holders in the
direction of the arrow AB.
3 Two screws
(+BVTT 4x12)
Cushion
9 Harness
8 Two screws (M 4x8)
W/Washer
6 Screw (+PS 4x8)
A
B
Earth plate
5 Two screws
(+PS 4x8)
4 Four screws
(+BVTP 4x12)
2 Two screws
(+BVTT 4x12)
CN510
Cushion
0 Remove the bottom cabinet
assembly, G and Q block
assemblies in the direction
of the arrow C.
C
CN602
CN603
!- Two screws
(+BV 3x8)
CN011
UPPER
SIDE
CN51
CN52
!= J board
![ Six screws
(+BV 3x8)
!] H board
Cushion
PVM-14L2/20L2
UPPER
Cushion
SIDE
1-15
1-6-9. 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
..
c
Anode button
a
b
b
a
(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
..
. Handling Precautions
..
the direction of the arrow c.
(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.
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 ––
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
a) Note : Use an appropriate rating plug which is applied to local regulations.
a)
KEMA, EI (FIMKO), CEBEC, VDE, BS
YP332
1-16
PVM-14L2/20L2
Section 2
Set-up Adjustment
2-1. Equipment Required
. Oscilloscope
Tektronix 2465 or equivalent (with bandwidth of 350
MHz)
. NTSC/PAL/SECAM component signal generator
Tektronix TG2000 +AVG1 (option module)
+AWVG2 (option module) or equivalent
. SDI signal generator
Tektronix TSG-422
. Monoscope signal generator
ShibaSoku TP22AX or equivalent
. VG (programmable video signal generator)
VG854 or equivalent
. Frequency counter
Advantest TR5821AK or equivalent
. Digital VOM
Advantest TR6845 or equivalent
. Slide induction transformer
. High tension voltmeter
. DC power supply
. Ammeter
. Luminance meter
Minolta CRT Color Analyzer CA-100 or equivalent.
If the Minolta CRT Color Analyzer CA-100 is not
available, perform the measurement by visual inspection by comparing the monitor that has already been
adjusted earlier with the monitor that you want to
adjust.
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
[DEGAUSS] key shown on the display of the menu.
SIGNAL
SIG
LEVEL...
•
DEF
WHITE BALANCE...
•
OPT
DECODER COLOR...
•
SYS
SECAM 1...
•
STA
SECAM 2...
•
ENG
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
[DEGAUSS] key shown on the display of the menu.
4. Easy ON/OFF of the service mode
If once entering the service mode after having turned
on the power, easy ON/OFF is possible by once more
pressing the LINE A, LINE B, RGB/COMPONENT,
OPTION A or OPTION B switch on the front panel
(the LED lights) as long as the power is not turned off
or as long as the service mode is not finished.
PVM-14L2/20L2
2-1
5. 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 replaced without executing FACTORY SAVE as
described in the following paragraph, you cannot
execute FACTORY LOAD.
6. 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 executed unless MAINTENANCE ID is set.
FACTORY SET
If the following circuit board is replaced or the following
NVRAM on the respective board is replaced, perform the
following settings.
B board : IC450
1. Select the following sub menus from the Service Menu
in the order of : [SYSTEM] → [MAINTENANCE ID]
and type 111.
2. 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 2-4.
3. If the NVRAM on the B board is replaced, select the
following sub menus from the Service Menu : [ENGINEER] → [CLEAR NVM ON B] and write data.
4. If any IC on the B board is replaced, 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.
2-2
PVM-14L2/20L2
Service Mode screen display
SIGNAL
LEVEL...
SIG
•
WHITE BALANCE...
DEF
•
DECODER COLOR...
OPT
•
SECAM 1...
SYS
•
STA
SECAM 2...
•
ENG
LEVEL
SIG
• SUB BRIGHT
DEF
• C LEVEL
OPT
• Y LEVEL
SYS
• Y DELAY
STA
• SUB CHROMA
ENG
• SUB PHASE
WHITE BALANCE
SIG
• SUB CONTRAST
DEF
• SUB BRIGHT
OPT
• COLOR TEMP
SYS
• MANUAL ADJ
STA
• ADJUST GAIN...
ENG
• ADJUST BIAS...
• ADJUST FINE...
DECODER COLOR
SIG
• DEC PN ID
DEF
• DEC PN GW
OPT
• DEC LPF
SYS
• DEC C TRAP SW
STA
• DEC FILTER SW
ENG
• DEC BPF Q
• DEC BPF FO
• DEC N COMB
SECAM 1
SIG
• DEC S INHBT
DEF
OPT
SYS
STA
ENG
155
D65
81
48
15
0
55
58
81
0
0
0
0
0
0
0
0
0
SECAM 2
SIG
• DEC S ID
DEF
• DEC S GP
OPT
• DEC S VID SW
SYS
• DEC BELL FO
STA
• DEC BELL HPF
ENG
• DEC S B-Y ADJ
• DEC S R-Y ADJ
• DEC S-D TRAP SW
0
0
0
0
0
0
0
0
PVM-14L2/20L2
2-3
DEFLECTION
SIG
• FOCUS...
• RASTER H...
DEF
OPT
• RASTER V...
SYS
• GEOMETRY...
STA
ENG
FOCUS
DEFLECTION
SIG
• H DUTY
• HFV SENSE
DEF
• HFV CONTROL
OPT
• H DF PHASE
SYS
STA
• H DF PARA
• H PLL
ENG
RASTER H
DEFLECTION
SIG
• H SIZE
DEF
• H BLK LEFT
OPT
• H POSITION
SYS
STA
ENG
RASTER V
DEFLECTION
SIG
• V SIZE
• V CENTER
DEF
• V BLK TOP
OPT
SYS
STA
ENG
GEOMETRY
DEFLECTION
SIG
• V S LIN
• V C LIN
DEF
• TRAPEZOID
OPT
• SIDE PIN
SYS
• SIDE PIN W
STA
• SIDE PIN BAL
ENG
• PARA CONTROL
• SIDE PIN S
245
LOCK
89
102
167
13
24
18
22
15
15
87
78
4
24
28
30
12
14
20
2-4
PVM-14L2/20L2
SYSTEM
SIG
VERSION
• MODEL INCH
DEF
OPT
• MODEL TYPE
• AGING MODE
SYS
• FACTORY...
STA
SIGNAL...
ENG
•
MAINTENANCE ID 0
•
SETUP...
•
1.0
AGING MODE
14
J
All white screen
To return to the original screen,
press the button of the input selector
illuminating in orange.
SYSTEM
SIG
VERSION
• MODEL INCH
DEF
• MODEL TYPE
OPT
• AGING MODE
SYS
• FACTORY...
STA
SIGNAL...
ENG
•
MAINTENANCE ID 0
•
SETUP...
•
1.0
14
J
FACTORY
SYSTEM
SIG
• LOAD...
DEF
• STANDARD...
OPT
SYS
STA
ENG
LOAD cannot be selected and remains
in the blue display unless the NVM data is valid.
In such a case, clear the NVM and
make the NVM data valid first.
However, if the default factory data is damaged,
or if the FACTORY SET process is not executed
after ROM is replaced, LOAD cannot be executed.
STANDARD returns the various setups
of the user menu to the default factory setting.
SIGNAL
SYSTEM
SIG
•
DEF
OPT
SYS
STA
ENG
SETUP
SYSTEM
SIG
•
DEF
OPT
SYS
STA
ENG
COLOR DET.
CHINESE ENA
AUTO
OFF
PVM-14L2/20L2
2-5
STAT US
SIG
ADJUST ERROR
ABNORMAL I2C
DEF
OPT
NVM BOARD B
SYS
STA
ENG
OK
0
0
ENGINEER 1/3
SIG
• ASUP SAMPLE POS
DEF
• FACTORY SAVE...
OPT
SYS
• CLEAR NVM ON B...
STA
ENG
OPTION (BKM-129X)
OPTION
SIG
BKM-129X
DEF
OPT
SYS
STA
ENG
OPTION (BKM-120D)
OPTION
SIG
BKM-120D (1/3)
• OE
DEF
• P SAVE
OPT
• DISPLAY
SYS
• D A
STA
• D B
ENG
• H BLK1
OFF
ENGINEER 2/3
SIG
ASUP
DEF
• DATA REFRESH
• OSDLIMIT
OPT
• INTERNAL SIGNAL
SYS
STA
ENG
OPTION
SIG
BKM-120D (2/3)
1
0
1
0
1
0
DEF
OPT
SYS
STA
ENG
• DA FV
• DB FV
• Y LEVEL
• PB LEVEL
• PR LEVEL
CBAR SMPTE
ON
OFF
109
82
0
84
71
74
ENGINEER 3/3
SIG
• H SYNC COUNT
DEF
• MENU DOTCLOCK
OPT
• MENU H POS
• OPTION BOARD ID 255
SYS
•GENERIC
STA
ENG
OPTION
SIG
BKM-120D (3/3)
• YB2
DEF
• YW0
OPT
• YW1
SYS
STA
ENG
HIDE
231
9
0
0
0
0
OPTION (BKM-150CP)
OPTION
SIG
BKM-150CP (1/4)
• OE
DEF
• P SAVE
OPT
• DISPLAY
SYS
• D A
STA
• D B
ENG
• H BLK1
2-6
OPTION
SIG
BKM-150CP (2/4)
0
0
1
0
1
0
• DA FV
DEF
• DB FV
OPT
• Y LEVEL
SYS
• PB LEVEL
STA
• PR LEVEL
ENG
OPTION
SIG
BKM-150CP (4/4)
• AUDIO GRP 0
DEF
• AUDIO GRP 1
OPT
• AUDIO CH 0
SYS
• AUDIO CH 1
STA
• AUDIO MIX
ENG
• AUDIO MONO L
• AUDIO MONO R 1
85
110
105
80
80
1
1
0
1
1
0
OPTION
SIG
BKM-150CP (3/4)
• SDTI SW
DEF
• TC MODE 0
OPT
• TC MODE 1
SYS
• TC MODE 2
STA
• AUDIO MUTE
ENG
0
0
0
0
0
PVM-14L2/20L2
2-3. Preparation (2). Initialization
2-4. Writing Model Data
* Supply composite video or component signals as shown
in Table 2-2.
Signal Details of signal Standard
level
P-W
Composite 358NT 100 % white 0.714 V
video 75 % white 0.536 V
PAL 100 % white 0.7 V
75 % white 0.525 V
Component BETA0 100 % white Y 0.7143 V
75 % white Y 0.536 V
75 % color 0.757 V
B-Y, R-Y
(P-P for
this item only)
BETA 7.5 100 % white Y 0.7143 V
75 % white Y 0.536 V
75 % color 0.7 V
B-Y, R-Y
(P-P for
this item only)
SMPTE 100 % white Y 0.7 V
75 % white Y 0.525 V
75%color 0.525 V
B-Y, R-Y
(P-P for
this item only)
Voice/sound _5 dBu 0.436Vrms
Table 2-2
1. 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 2-4.
Model name Model type Model inch
PVM-14L2 J 14
PVM-14L2 U/C 14
PVM-14L2 AEP 14
PVM-14L2 AUS 14
PVM-20L2 J 20
PVM-20L2 U/C 20
PVM-20L2 AEP 20
PVM-20L2 AUS 20
Table. 2-4
2. Select the following sub menus from the Service Menu
in the order of : [SIGNAL] → [WHITE BALANCE]
and type the following data in [COLOR TEMP].
U/C, AEP, AUS D65
J D93
* Standard inspection state
Unless otherwise specified in this manual, make adjustment under the following conditions.
The following sub menus are located beneath the USER
CONTROL menu.
APERTURE OFF (USER CONTROL menu)
BRIGHT 0
CONTRAST 80
VOLUME 50
CHROMA 50 (Fixed)
PHASE 0 (Fixed)
PVM-14L2/20L2
2-5. Picture Output
1. AC input voltage setting
1. Input VIDEO signals and AUDIO signals to respective
terminals on the connector panel.
2. Set the slide induction transformer AC voltage as
shown in Table 2-5.
Model name Voltage
PVM-14L2 AC 100 V to 240 V ±10 %
PVM-20L2
Table. 2-5
2-7
2-6. Free-run Frequency Adjustment
2-7. Landing Adjustment
Find the following adjustment menu in the layer under the
DEFLECTION menu of the service mode.
FOCUS
H PLL
HFV SENCE
HFV CONTROL
1. Connect the 480/60I cross hatch signal to the G/Y
terminal of RGB/COMPONENT IN connector.
2. Enter the service mode.
3. Switch H PLL of the menu from LOCK to FREE
RUN.
4. Adjust HFV SENSE and HFV CONTROL of the
menu until number of screens losing sync is minimal.
When a frequency counter is used for this adjustment,
connect the frequency counter probe between the
outside terminal of R1523/G board and chassis ground.
Adjust HFV SENSE and HFV CONTROL of the
menu so that frequency becomes 15,734 ±30 Hz.
ABCDEFGHIJKL
T502
L602
R1523
(CHASSIS)
Frequency counter
1. CONTRAST... MAX
BRIGHT... Conspicuous position
2. Roughly adjust the white balance, G2, and convergence.
3. Switch the video signal generator output signal to
green only.
4. Move back the DY backward (in the direction toward
neck).
5. Adjust the purity knob so that the green will come to
the center of the screen. Make R and B almost
identical. (Fig. 2-1)
6. Switch to B only, R only, and G only and verify each.
7. Bring the deflection yoke gradually forward and adjust
the deflection yoke so that R and B on both sides of
the screen will be green. (Fig.2-2 → Fig. 2-3)
8. If the deflection yoke comes forward too much, the
pattern shown in Fig.2-4 will appear. If so, move the
deflection yoke backward. (Fig.2-4 → Fig.2-3)
9. Switch the signal generator output signal to the BLUE
only color and confirm the screen. (Fig. 2-6)
10. Switch the signal generator output signal to the RED
1
2
3
4
5
6
7
8
9
10
only color and confirm the screen. (Fig. 2-9)
11. When two colors are mixed, set the mixed color as the
standard, and repeat operations 6 and 7.
12. Switch to an all-white signal and check the uniformity.
13. When the deflection yoke position is determined,
fasten it with the fixture.
Fig. 2-1
GB
R
A
A’ = A
A’
5. Switch H PLL of the menu from FREE RUN to
LOCK. Confirm that the screen is locked.
2-8
GGBR
Fig. 2-2 Fig. 2-3 Fig. 2-4
BRG
Fig. 2-5 Fig. 2-6 Fig. 2-7
RGB
Fig. 2-8 Fig. 2-9 Fig. 2-10
B
R
GRB
BGR
RBG
PVM-14L2/20L2
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