Sony PVM-9L1 User manual

TRINITRON®COLOR VIDEO MONITOR
PVM-9L1
SERVICE MANUAL
1st Edition
CHASSIS NO. SCC-M04H-A

PVM-9L1
!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.

1
PVM-9L1
Table of Contents
1. Service Overview
1-1. Appearance Figure ......................................................................................1-1
1-2. Board Locations ..........................................................................................1-1
1-3. Disassembly ................................................................................................1-2
1-3-1. Top Cover...................................................................................1-2
1-3-2. G Board ......................................................................................1-2
1-3-3. Rear Cover Assembly ................................................................1-3
1-3-4. A Board ......................................................................................1-3
1-3-5. C Board and Deflection Yoke ....................................................1-4
1-3-6. Bottom and A Board ..................................................................1-4
1-3-7. Speaker .......................................................................................1-5
1-3-8. Picture Tube and Bezel Assembly .............................................1-5
1-3-9. Anode Cap..................................................................................1-6
1-4. Warning on Power Connection ...................................................................1-6
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. Rough Adjustment for Size .........................................................................2-7
2-8. G2 Adjustment ............................................................................................2-7
2-9. Deflection Yoke Neck Rotation Adjustment ..............................................2-8
2-10. Convergence Adjustment (1) ......................................................................2-9
2-11. Landing Adjustment (2) ............................................................................2-10
2-12. Focus Adjustment......................................................................................2-10
2-13. White Balance Adjustment .......................................................................2-10
2-13-1. Sub Bright Adjustment..............................................................2-10
2-13-2. White Balance Adjustment [D65] .............................................2-10
2-13-3. White Balance Adjustment [D93] .............................................2-11
2-14. Deflection Adjustment ..............................................................................2-11
2-14-1. 525 Vertical Deflection Adjustment .........................................2-11
2-14-2. 625 Vertical Deflection Adjustment .........................................2-12
2-15. Horizontal Deflection Adjustment .............................................................2-13
2-15-1. 525 Horizontal Deflection Adjustment .....................................2-13
2-15-2. 625 Horizontal Deflection Adjustment .....................................2-13
2-16. Sub Contrast Adjustment ...........................................................................2-14
2-17. Adjustment of NTSC Mode ......................................................................2-14
2-17-1. NTSC Composite Input............................................................2-14
2-17-2. NTSC Y/C Input ......................................................................2-14

2PVM-9L1
2-18. Adjustment of PAL Mode .........................................................................2-15
2-18-1. PAL Composite Input ..............................................................2-15
2-18-2. 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. Hold-down Circuit Connection Confirmation ...........................3-1
3-2-2. HV Protector Circuit Confirmation............................................3-1
3-2-3. IK Protector Confirmation .........................................................3-2
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 .....................................................................................5-5
6. Block Diagrams
A (1/2), C................................................................................................................6-1
A (2/2), G, DY........................................................................................................6-2
7. Diagrams
7-1. Frame Wiring ..............................................................................................7-2
Frame Wiring ............................................................................................7-2
7-2. Schematic Diagrams and Board Layouts ....................................................7-3
Schematic Diagrams
A (1/2) .......................................................................................................7-3
A (2/2) .......................................................................................................7-4
C ................................................................................................................7-9
G..............................................................................................................7-10
Board Layouts
A................................................................................................................7-6
C ................................................................................................................7-8
G..............................................................................................................7-11

1-1
PVM-9L1
Section 1
Service Overview
1-1. Appearance Figure
1-2. Board Locations
C
G
A

1-2 PVM-9L1
1-3. Disassembly
1-3-1. Top Cover
1-3-2. G Board
.Remove the top cover. (Refer to 1-3-1.)
2Four case stopper screws
(M 4 x8)
1Four case stopper screws
(M 4 x8)
3Top cover
1Screw
(+BVTT 3 x6)
3
Remove the G board
in the direction of the arrow.
2G shield lid
CN604
CN602
CN601

1-3
PVM-9L1
1-3-3. Rear Cover Assembly
.Remove the top cover. (Refer to 1-3-1.)
4Four screws
(+BVTP 3 x10)
3Screw
(+PSW 3 x10)
5Rear cover assembly
2Two screws
(+K 3 x6)
1Two screws
(+K 3 x6)
CN101
CN1501
1-3-4. A Board
.Remove the rear cover assembly. (Refer to 1-3-3.)
3Three screws
(+PWHTP 3 x10)
6A board
2Anode cap
1Remove the harness.
CN3501
CN301
Focus
Screen
CN102
CN801
CN802
Dowel
4Remove the A board
in the direction of the arrow.
5Power switch button
Note : Be careful not to damage
the power switch button.

1-4 PVM-9L1
1-3-5. C Board and Deflection Yoke
.Remove the rear cover assembly. (Refer to 1-3-3.)
1-3-6. Bottom and A Board
.Remove the rear cover assembly. (Refer to 1-3-3.)
3Focus2Screen
A board
CN703 CN702
CN701
4C board9Deflection yoke
5Screw
(+BVTT 3 x6)
6Screw
(+BVTT 3 x6)
7Two DY shield assemblies
8Loosen the screw.
1Remove the harness.
2Anode cap
8Bottom, A board
1Remove the harness.
3Two screws
(+K M3 x6)
5Two screws
(+KTP M3 x8)
4Two screws
(+BVTP 3 x12)
7Power switch button
Note : Be careful not to damage
the power switch button.
6Two positioning juts
CN802
CN801
CN102
CN301
CN3501
Cushion

1-5
PVM-9L1
1-3-7. Speaker
.Remove the rear cover assembly. (Refer to 1-3-3.)
.Remove the bottom and A board. (Refer to 1-3-6.)
1-3-8. Picture Tube and Bezel Assembly
.Remove the rear cover assembly. (Refer to 1-3-3.)
.Remove the C board. (Refer to 1-3-5.)
.Remove the bottom and A board. (Refer to 1-3-6.)
1Two screws
(+BVTP 3 x12)
2Speaker
Cushion
Bottom, A board
1Four self
tapping screws
3Front chassis assembly
4Picture tube
2Bezel assembly
Cushion

1-6 PVM-9L1
(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.
1-3-9. 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. 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-9L1
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-9L1
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
ICs on the respective board is replaced, perform the
following settings.
A board, IC001, IC004
1. Select the following sub menus from the Service Menu
in the order of : [SYSTEM] _ [MAINTENANCE ID]
and type 111.
2. When changing the IC003, select the following sub
menus from 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-9L1
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...
•ADJUST FINE...
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-9L1
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.

2-5
PVM-9L1
n
When changing DESIGN ITEMS 1/2 and 2/2, set the MAINTENANCE ID to 111 in SYSTEM.
DESIGN 2/2
SIG •CONTROL 0...
•CONTROL 1...
•CONTROL 2...
•FEATURES 0...
•FEATURES 1...
DEF
DES
SYS
ENG
DESIGN 2/2
CONTROL 0
CONTROL 1
CONTROL 2
FEATURES 0
LOAD
STANDARD
FEATURES 1
SIG •CL3210
•AKB
•RBL
•IE2
DEF
DES
SYS
ENG
1
0
0
0
DESIGN 2/2
SIG •HBL
•YUV10
•TFR
•SOY
DEF
DES
SYS
ENG
1
0
0
0
•RGBL 0
•SWO 0
DESIGN 2/2
SIG •PWL
•FBC
•CLD
DEF
DES
SYS
ENG
1
0
0
DESIGN 2/2
SIG •BKS
•BLS
•COR10
DEF
DES
SYS
ENG
0
0
3
•SVM10 0
DESIGN 2/2
SIG •WS10
•VMA10
•RP010
DEF
DES
SYS
ENG
0
0
0
•EVB 1
SYSTEM
SIG VERSION
•MODEL INCH
•
MODEL TYPE WW EXCEPT J
XXX
20 or 14 or 9
WW EXCEPT J or J
•FACTORY...
•AGING MODE
•MUTE TIME
•MAINTENANCE ID
DEF
DES
SYS
ENG
SYSTEM
SIG
•LOAD...
•STANDARD...
DEF
DES
SYS
ENG
STA
ENGINEER
SIG •FACTORY SAVE...
•CLEAR NVM ON A...
•COMB FILTER AUTO
DEF
DES
SYS
ENG
ENGINEER
SIG •FACTORY SAVE...
•CLEAR NVM ON A...
•COMB FILTER
DEF
DES
SYS
ENG
* MAINTENANCE ID = 111 selection possible
AUTO*AUTO
STA
LOAD FACTORY DATA
[ENTER]: ENTER
[MENU]: CANCEL
MAKE USER SETTING
STANDARD
[ENTER]: ENTER
[MENU]: CANCEL
SAVE FACTORY DATA
[ENTER]: ENTER
[MENU]: CANCEL
CLEAR NVM ON A BOARD
[ENTER]: ENTER
[MENU]: CANCEL
FACTORY SAVE
CLEAR NVM ON A

2-6 PVM-9L1
2-3. Preparation (2). Initialization
* Supply composite video signal as shown in Table 2-1.
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
Voice/sound _5 dBu 0.436Vrms
Table 2-1
2-4. Writing Model Data
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 2-2.
Model name Model type Model inch
PVM-9L1 J 9
PVM-9L1 AUS 9
Table. 2-2
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].
WW EXCEPT J D65
JD93
*Standard inspection state
Unless otherwise specified in this manual, make adjust-
ment under the following conditions.
VOLUME 0
CONTRAST 80
BRIGHTNESS 0
CHROMA 50
PHASE 0
ASPECT RATIO 4 : 3
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 2-3.
Model name Voltage
PVM-9L1 AC 100 V to 240 V ±10 %
Table. 2-3
2-6. Landing Adjustment (1)
1. CONTRAST... MAX
BRIGHT... Conspicuous position
2. Roughly adjust the white balance, G2, and conver-
gence.
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
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 DY screw.

2-7
PVM-9L1
Fig. 2-11
Fig. 2-12
Purity adjustment control
Purity
Purity control
Deflection yoke
2-7. Rough Adjustment for Size
1. Receive PAL SPCB signal.
2. Reduce H size to be able to see whole raster, and set
the brightness to maximam.
3. Adjust raster center with S501.
4. Set brightness to 0.
5. H SIZE 817.0 blocks
V SIZE 813.0 blocks
Adjust the picture size roughly with V CENT, V SIZE,
H POSITION, H SIZE and PIN AMP.
2-8. G2 Adjustment
Conditions
CONTRAST : 80
BRIGHTNESS : 0
1. Connect the 575/50I all black signal to the LINE A
connector.
2. Select the cathode that shows the highest pedestal level
among the red, green and blue cathodes.
3. Connect an oscilloscope probe to the following test
points and adjust the G2 control (SCREEN) so that the
pedestal level satisfies the specification.
RED : KR
GREEN : KG
BLUE : KB
Standard value A = 95 ±2 VDC
Fig. 2-13
A
Pedestal level
GND
Focus
Focus
Screen
Screen
Fig. 2-1
GGBR
B
R
BRG
RGB
BGR
RBG
GRB
GB
A’
R
A
A’ = A
Fig. 2-2 Fig. 2-3 Fig. 2-4
Fig. 2-5 Fig. 2-6 Fig. 2-7
Fig. 2-8 Fig. 2-9 Fig. 2-10

2-8 PVM-9L1
3. The following patterns cannot be corrected by turning
the neck. (Figs.2-19, 2-20, and 2-21)
Fig. 2-19
Fig. 2-20
Fig. 2-21
R G B
R G B
R
G
B
R
G
B
R
BR B
G
G
G
(G)
(G)
G(G) (G)
R B
R B
* Gun rotation
The X-axis and Y-axis
beams are distorted on
both sides.
* HCR Large (small)
The horizontal portion of the
G raster is wider (narrower)
than that of the RB raster on
both sides of the screen.
* VCR Large (small)
The vertical portion of the
G raster is wider (narrower)
than that of the RB raster on
both sides of the screen.
2-9. Deflection Yoke Neck Rotation
Adjustment
1. If there are mis-convergence on both sides of X and Y
axes, move the DY neck in the direction of the arrow
so that the degree of mis-convergence satisfies the
allowable range of specification over the entire screen.
2. Insert the wedge between the deflection yoke and CRT
funnel to lock the deflection yoke. (Fig.2-18)
Fig. 2-18
LL
RB BR
LL
BR RB
(1) Reverse cross
mis-convergence pattern (2) Cross mis-convergence pattern
Move the deflection yoke
downward.
(3) Pattern of left-sided
deflection yoke (4) Pattern of right-sided deflection yoke
Move the deflection
yoke to the right when
viewed from the CRT
screen.
Move the deflection
yoke to the left when
viewed from the CRT
screen.
Move the deflection yoke
upward.
G B R
B
G
R
B
G
R
B G R
R G BB G R
R
G
B
R
G
B
Fig. 2-18 Fig. 2-19
Fig. 2-20 Fig. 2-21

2-9
PVM-9L1
2-10. Convergence Adjustment (1)
1. Input a dot pattern signal.
CONTRAST... Conspicuous position
BRIGHT... 0
2. Align the horizontal R, G, and B dots at the center of
the screen by adjusting RV701 on the C board. (H.
STAT ADJ.)
*When H-CENT is changed after H-STAT adjustment,
readjust H-STAT. (H-STAT will change by means of
H-CENT VR.)
3. Using V STAT Mg, align the top and bottom of R, G
and B on center of the screen. (Fig. 2-22, 2-23)
*After V-STAT adjustment, paint-lock the knob.
V-STAT Mg knob
While keeping the angles A and B equal (I = I’), align the
vertical convergence.
Fig. 2-22 Good example
If the A and B knobs are not symmetrical (I ≠I’), the focus
may deteriorate, beam striking or other adverse effects may
occur.
Fig. 2-23 Bad example
I
AB
X
Y
I’
AB
X
Y
I’I
4. For HMC, use the six poles Mg to adjust the R and B
dots so that they will be symmetrical horizontally with
respect to the G dot. (Fig. 2-24)
Fig. 2-24
5. For VMC, use the six poles Mg to adjust the R and B
dots so that they will be symmetrical vertically with
respect to the G dot. (Fig. 2-25)
Fig. 2-25
6. Repeat the adjustment steps from 2 through 5.
*The above adjustment may affect the landing, so after
adjustment, check the landing again.
7. Paint-lock the knobs after adjustment.
When the right convergence is not gotten even after
Convergence Adjustment (1), use the permalloy sheet to
adjust and fix the permalloy with RTV.
RGB
BA
II'
6-pole magnet
AA'
Change the opening
degree of the six poles Mg
to control the HMC.
Control the six poles Mg so
that A=A'. Maintain I=I'
when moving the Mg.
RGB
6-pole magnet
For VMC control, turn
knob to the right or left
without changing their
opening degree of the
six poles Mg.
Make adjustment so
that the gap will be the
same at the top and bottom.
Do not change. (Top)
(Bottom)

2-10 PVM-9L1
2-13. White Balance Adjustment
2-13-1. Sub Bright Adjustment
1 Receive Gray Scale pattern signal.
*Gray scale : 0, 5, 10, 15 IRE (4 Steps)
2. Set the following items at PICT/SOUND CTRL.
CONTRAST 8 MIN
BRIGHTNESS 8 0 (CENTER)
3. Adjust SUB BRIGHT using the [SUB BRIGHT] at
SEVICE MODE [SIGNAL] - [WHITE BALANCE].
Check 0 and 5 IRE section of Gray Scale is completely
cut off and 10 IRE section of it lights faintly. (If not
readjust it.)
2-13-2. White Balance Adjustment [D65]
1. Set the COLOR TEMP to D65.
2. Receive window pattern signal.
3. Adjust the D65 white balance within standard (de-
scription below) using the [R DRIVE] and [B DRIVE]
at SERVICE MODE [SIGNAL]-[WHITE BAL-
ANCE]-[AJUST GAIN].
XY
D65 313 329
Switch the item R 8 G 8 B with [ENTER], and
change the data with [+]/[_].
4. Change over to all white signal and lower signal level ,
set brightness to 3 (+1/_0) cd/m2.
5. Adjust the D65 white balance within standard (de-
scription below) using the [OFFSET R] and [OFFSET
G] at SERVICE MODE [SIGNAL]-[WHITE BAL-
ANCE]-[AJUST BIAS].
XY
D65 313 329
Switch the item R 8 G with [ENTER], and change
the data with [+]/[_].
6. Repeat the manual 2 to 5 until be able to adjust GAIN
side and BIAS side to the same value.
2-11. Landing Adjustment (2)
1. Attach the wobbling coil of allowance checker to neck
ass’y.
2. Input green flat field signal to LINE A.
3. Turn on the main power of the monitor, and degauss
CRT screen with a degausser.
4. Receive white flat field signal, and set brightness to 0,
contrast to 80.
5. Make sure that there is no flicker when changing input
signals among G, B, and R signals.
6. Select G signal and adjust the purity.
7. In case that flicker occurs in a flat field signal, adjust
with Mg.
8. When attaching a Mg, it should be on a center line
between CRT and the mislanding area.
9. Rotate the Mg to eliminate the mislanding.
10. Confirm that there is no mislanding on the other
colors.
11. Remove the air-core coil. Check uniformity in white
flat field signal.
12. Lock purity with white paint.
13. Confirmation after Mg is attached.
a. Deflection distortion
b. Landing after degaussing CRT
c. Convergence
d. Attach Mg to DY with bond.
2-12. Focus Adjustment
1. Input 480/60I cross hatch-signal.
2. Adjust the focus so that the center of screen is the best.
VR on the upper side FBT
3. Input 480/60I entire white signal and ensure the
uniformity of entire screen.
Specification : 4 JND or less