Sony Trinitron PVM-14N1A User manual

SERVICE MANUAL
eeeccesonosoere
PVM-14N1A
PVM-14N1E
PVM-14N1MDE
PVM-14N1U
PVM-14N2A
PVM-14N2E
PVM-14N2U
SSM-14NTA
SSM-14N1E
SSM-14N1U
Australian
AEP
AEP
US
Canadian
Australian
AEP
US
Canadian
Australian
AEP
US
Canadian
eee meen eneeeecanense
SCC-J34B-A
SCC-H98B-A
SCC-H98G-A
SCC-H96B-A
SCC-J34A-A
SCC-H98BA-A
SCC-H96A-A
SCC-J34F-A
SCC-H98E-A
SCC-H96E-A
MODEL
coeunesennnosce
-PVM-20N1A
PVM-20N1E
PVM-20N1U
PVM-20N2A
PVM-20N2E
PVM-20N2U
SSM-20N1A
SSM-20N1E
SSM-20N1U
SII CHASSIS
Tere ere
Australian
AEP
US
Canadian
Australian
AEP
US
Canadian
Australian
AEP
US
Canadian
ecm e near sererereces
SCC-J34D-A
SCC-H98D-A
SCC-H96D-A
SCC-J34C-A
SCC-H98C-A
SCC-H96C-A
SCC-J34E-A
SCC-H98F-A
SCC-H96F-A
REVISED-3
TRINITRONs COLOR VIDEO MONITOR
SONY.

Specifications
Video signal
Color system NTSC, PAL, SECAM, NTSC4.43
Resolution 500 TV lines
Frequency response
LINE 6 MHz+3dB (Y signal)
RGB
(PVM-14N1A/14N1E/14N10/14N2A/14N2E/14N2U/
20N 1 A/20N 1E/20N 1U/20N2A/20N2E/20N2U ONLY)
6 MHz+3dB
Picture performance
Normal scan 7 % over scan of CRT effective screen
area
H. linearity Less than 8.0 % (typical)
V. linearity Less than 7.0 % (typical)
CRT P22 phosphor
Color temperature 6,500 K
inputs
LINE A/B (PVM-14N1A/14N1E/14NIMDE/14N1U/14N2A/
14N2E/14N2U/20N 1 A/20N 1 E/20N 1 U/20N2A/20N2E/
20N2U ONLY)
Y/C IN 4-pin mini-DIN(x2)
See the pin assignment on the next page.
VIDEO IN BNC connector (x2), 1 Vp-p +3 dB, -6
dB, sync negative
AUDIO IN Phono jack (x2), —-5 dBu®, more than 47
kilo-ohms
LINE (SSM-14N1 A/14N1E/14N1U/20N1A/20N1E/20N1U
ONLY)
Y/C IN 4-pin mini-DIN(x1)
See the pin assignment on this page.
VIDEO IN BNC connector (x1), | Vp-p+3 dB,
—6 dB, sync negative
AUDIO IN _ Phono jack (x1), -5 dBua), more than 47
kilo-ohms
RGB (PVM-14N2A/14N2E/14N2U/20N2A/20N2E/20N2U
only)
R/G/B BNC connector (x3)
0.7 Vp-p +3 dB, -6 dB
Sync on green: 0.3 Vp-p, negative,
Automatic 75 ohms termination
Phono jack (x1), -5 dBu®, more than 47
kilo-ohms
BNC connector (x1)
4 Vp-p +3 dB, —6 dB, sync negative
AUDIO IN
EXT SYNC
REMOTE (PVM-14N2A/14N2E/14N2U/20N2A/20N2E/
-20N2U only)
Phono jack (X1)
Open: currently selected input
signal
Low state (GND): input signal
selected prior to the current
input signal
a) O dBu = 0.775 Vr.m.s.
Outputs
LINE A
Y/C OUT — 4-pin mim-DIN (x1) loop-through,
Automatic 75 ohms termination
VIDEO OUT
BNC connector (x1) loop-through,
Automatic 75 ohms termination
AUDIO OUT
Speaker output
General
(PVM-I14N1MDE only)
Classification of equipment
— Type of protection against electric shock:
Class I equipment
* Standard evaluated to:
Phono jack (x1) loop-through
Output level: 0.8 W
EN 60 601
CSA C22.2 No,601.1
UL 2601-1
—Degree of protection against harmful ingress of water:
Ordinary equipment
— Degree of safety of application in the presence of a
flammable anaesthetic mixture:
Not protected equipment
— Mode of operation:
Continuous operation
— Information concerning type and frequency of technical
maintenance:
Not need maintenance equipment
— Main power switch:
CRT
Power consumption
Power requirements
Functional switch
14-inch CRT with P-22
phosphor
Visible picture size 332 mm
(13-inch measured diagonally)
PVM-I4N1A/14N1E/14N1MDE/
14N1U/SSM-14N1TA/14N1E/
14N1U: 80W
PVM-14N2A/14N2E/14N2U: 80W
PVM-20N1U/20N2U/
SSM-20N1U: 100W
PVM-20N1 A/20N2A/20N 1E/
20N2E/SSM-20N 1 A/20N1E: 105 W
100 to 240 V AC, 50/60Hz
“For use of PVM-14N1U/14N2U/
20N1U/20N2U/SSM-14N1U/20N1U”,
operate these monitors on 120 V AC.
1.2-0.6A (PVM-14NIMDE)
Operating temperature
PVM-I4NIA/I4NIE/I4N1U/14N2A/
14N2E/14N2U/20N 1 A/20N 1E/
20N 1U/20N2A/20N2E/20N2U,
SSM-14N1A/14N1E/14N1U/20N1 A/
20N1E/20N1U
(0 to +35°C (32 to 95°F)
PVM-14N1MDE:0 to +40°C (32 to
104°F)

Transport & Storage Condition
Storage Temperature—10 to +40°C (14 tol104°F)
Humidity 0 to 90 %
Pressure 700 to 1060 hpa (PVM-14N1MDE)
Dimensions (w/h/d) PVM- 14N1A/14N1E/14N1MDE/
14N1U/14N2A/14N2E/14N2U,
SSM-14N1A/14N1E/14N1U
7346 x 340 x 414 mm
(13%x 134 x 16%% inches)
PVM-20N 1 A/20N1E/20N1U/20N2A/
20N2E/20N2U,
SSM-20N1A/20N1E/20N1U:
449 x 441x 502 mm
(17% x17 x 197% inches)
PVM- 14N1A/I4N1E/14N1MDE/
14N1U/14N2A/14N2E/14N2U,
SSM-14N1A/I4NIE/14N1U:
Approx. 15 kg (33 Ib 1 oz)
PVM- 20N1A/20N1E/20N1U/20N2A/
20N2E/20N2U,
SSM-20N 1 A/20N1E/20N1U:
Approx. 28 kg (61 Ib 12 oz)
AC power cord (1)
Operating Instructions (1)
PVM-14NIMDE
:Splash-proof covers (2)
Mass
Accessory supplied
(PVM-14N1IMDE only)
Electromagnetic C
Compatibility
Pin assignment
Y/C IN connector (4-pin mini-DIN)
1 Vp-p, sync negative,
75 ohms
286m Vp-p (NTSC),
300m Vp-p (PAL),
burst
Delay time between Y
and C: within 0 + 100
nsec., 75 ohms
4 GND for
CHROMA-input
Design and specifications are subject to change without
notice.
CHROMA
subcarrier-input
This device compiles with the requirements of Directive 89/336/EEC concerning
electromagnetic compatibility.
This device meets EN50081-1/92 and EN50082- 1/92.
CAUTION
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE
ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR CARBON
PAINTED ON THE CRT, AFTER REMOVING THE ANODE.
WARNING!!
AN ISOLATION 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 SHADING AND MARK A ON THE
SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART 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 MANUAL.
FOLLOW THESE PROCEDURES WHENEVER CRITICAL
COMPONENTS ARE REPLACED OR IMPROPER OPERATION IS
SUSPECTED.
ATTENTION
APRES AVOIR DECONNECTE LE CAP DE L'ANODE,
COURTCIRCUITER L'ANODE DU TUBE CATHODIQUE ET CELUI
DE L'ANODE DU CAP AU CHASSIS METALLIQUE DE L'APPAREIL,
OU AU COUCHE DE CARBONE PEINTE SUR LE TUBE CATHODIQUE
OU AU BLINDAGE DU TUBE CATHODIQUE.
ATTENTION!!
AFIN D'EVITER TOUT RISQUE D'ELECTROCUTION PROVENANT
D'UN CHASSIS SOUS TENSION, UN TRANSFORMATEUR
D'ISOLEMENT DOIT ETRE UTILISE LORS DE TOUT DEPANNAGE.
LE CHASSIS DE CE RECEPTEUR EST DIRECTEMENT RACCORDE
A L'ALIMENTATION SECTEUR.
ATTENTION AUX COMPOSANTS RELATIFS A LA
SECURITE!! |
LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET PAR UNE
MARQUE A SUR LES VUES EXPLOSEES ET LES LISTES DE
PIECES SONT D'UNE IMPORTANCE CRITIQUE PUR LA SECURITE
DU FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES
COMPOSANTS SONY DONT LE NUMERO DE PIECE EST INDIQUE
DANS LE PRESENT MANUEL OU DANS DES SUPPLEMENTS
PUBLIES PAR SONY.
— 3--

TABLE OF CONTENTS
1. GENERAL
FOAtu Les ceceececeeeec tec stcrscceceseteanceneeecseeeeaeesseeeeeaeeceesnerca rece rscaeneegens 5
Location and Function of Parts and Controls ------+--+-+++0:++ 5
Using On-Screen Menus -oeccsseeeccsssseceeeeceseeeeeeeseseceaareesseereas sees 7
CONMNECHIONS crrrrersecerecerteceesenecceeeceterceecsnsenecseecesesceescceeerenerenaaces 10
Attaching the Splash-Proof Covers -+--::::::::s:essesreee teen 10
2. DISASSEMBLY
9-1, Cabinet Removal o++:+11++scccesccccsesceccrsccssccaccsssescscccssecoensnnansens 11
9-9 AK Boaed Removal siiceceisissicsocks aiesees sneered Rensnacanae ences 11
2-3. S$ Board Removal --:-----::--c-scseceseeseesesecessseecearcetensecsseveesennens 1]
DA Service POSsition4 sess seserscsessscevsssoesscscsacsccnssavsesacessasenesocsesones 1]
9-5. Picture Tube Removal ceccccecsccceeeseseseesseecececscsceeeeeeeeereceeceeses 12
Removal of Anode-cap ain wledbeues dovatedemiee dhaedessekeedveveseesees erences 12
3. SET-UP ADJUSTMENTS
3-]. Preparations (1) sreeesseeessersreesseereeereeersseteesesssesreseensesseeenness 13
3-2. Preparations (2) s-r--c-erceceeeectete terete teeereneesesetenseetenenaees 15
3-3, Writing Wdel ‘Data: s-ceeseceettecercxseteragewetciei etnias nes 15
3-4. Picture Output dleaceeddsaeidesatecsDetsecarssess na benwoveiedvesves ssiends centeres 15
3-5, Landing Adjustment webiedvenstad dugaicssnceseante sedate hiwacmetevcteceeseiae 15
3-6. Convergence Adjusment s shehcua Satatens cah oss cuoeeer ates eoustcccenatel 16
3-7. Diflection Yoke Neck Rotation Adjustment ------.-------+--+++ 17
3-8, G2 Adjustment SdPUOT A aaa e wae suse ere Goede se eege besa piulesad ceeadsceweesaeeees 18
3-9, White Balance Adjustment ---:+-:--scsccssessecseecsesseeessen 18
3-10. Focus Adjustment Kiweugeseuns dodea sean bavesuens niece wan eee cegenbestaonueeeee 19
4. SAFETY RELATED ADJUSTMENT ....------eeeeeees 20
Section Title Page
5. CIRCUIT ADJUSTMENT
1. Preparations WaneaeeduuapcaecaWeussh ees auassSsudocaab ee delcaasudecsagerceess how 21
Il. Deflection System Adjustment
1. Vertical Deflection Section Adjustment -----------+-+-+ 21
2. Horizontal Deflection Section Adjustment ------------- 21
lI. Signal System Adjustment
1. NTSC Color Demodulation Adjustment --------------: 22
2. Analog RGB MAX Contrast Adjustment --------------- 22
6. DIAGRAMS
6-1. Block Diagrams (1) ce Seeinw Saw aa tidacindnst a citwiebhied sasiee eve tas vievaveie dea eiices 23
Block Diagrams (2) seabda Rate satin db aecncbceSeucbinvaeseeceusweseeeetewceees 25
Block Diagrams (3) Sdebse ls vaee eaters asecetaveseudbeuekke tveed sencetsaeewes 26
Block Diagrams (4) ives vxwla suadavesadvesus eeustseeswtenetacdeseeecnees demeeees a7
Block Diagrams (5) Sodersebgseeceaesicaseuseuns dosceerausecdcheshescerecsteses 27
6-2. Circuit Boards LOCation -:ceececceccsccsesececceeeecenceereraneeesseeseneees 28
6-3. Printed Wiring Boards and Schematic Diagrams -------------- 28
A Pearl sssetesics hse eet ensnere see adnan aie os 9
Q Bard -cceeececcecreteeececeeeet scene nencncneeeeseesesenesesersceseessersesenenees 43
CA Board ocessccesescecteceseceececeeseseseesenne nes nensacnseceesesencusenensonnenes 43
CR Boards isco ee ee 44
S Board] vccssssccssccssscccssseeseececssessssserasssesssscsscecnssereenenseessacseegs 50
6-4, SemiCONdUctOrs -------ee eerste eee ee eee e eens eeeserscteneeeeseeseeeeeseesereusens 53
7. EXPLODED VIEWS
Ts [oc Haseie (id line bay tase eae 54
7-2. Chassis (20 inch) die tad woes bee Toeeue best acoacwiaae Uncnsew tamu teeets oieeadoo cain 55

Features
Picture
Fine pitch Trinitron” picture tube
The fine pitch trinitron tube provides a high resolution
picture. Horizontal resolution is more than 500 TV
lines at the center of the picture.
Comb filter
When NTSC video signals are received, a comb filter
activates to make more accurate Y/C separation. This
contributes to less of a decrease in resolution, cross
color and cross luminance phenomena.
Beam current feedback circuit
The built-in beam current feedback circuit assures
stable white balance.
Four color system available
The monitor can display NTSC, PAL, SECAM and
NTSCa.3”) signals. The appropriate color system is
selected automatically.
Input
Analog RGB input connectors
(for PVM-14N2A/14N2E/14N2U/20N2A/20N2E/
20N2U only)
Analog RGB signals from video equipment can be
input through these connectors.
Y/C Input connectors
The video signal, split into the chrominance signal (C)
SECTION 1
GENERAL
Functions
On-screen menus
You can set monitor operation settings by using the
on-screen menus.
EIA standard 19-inch rack mounting
By using an MB-502B mounting bracket (for a 14-inch
monitor, not supplied) or SLR-103A slide rail (for a
20-inch monitor, not supplied), the monitor can be
mounted in an EJA standard 19-inch rack.
For details on mounting, refer to the instruction manuals
supplied with the mounting bracket kit or slide rail kit.
Splash-proof covers (for PVM-14N1MDE only)
The monitor can be covered with splash-proof covers.
The splash-proof covers protect the ventilation holes
from splashes from medicines and other liquids. amex
OOUU
LINE 8 AGB
This section is extracted from
instruction manual.
Location and Function of Parts and Controls
Indicator
© LINE A/LINE B/RGB (input select) buttons
(PVM-14N1A/14N 1E/14NIMDE/14N1U/14N2A/
14N2E/14N2U/20N 1 A/20N1E/20N 1U/20N2A/
20N2E/20N2U only)
Press to select the program to be monitored.
and the luminance signal (Y), can be input through this
connector, eliminating the interference between the
two signals, which tends to occur in a composite video
signal, ensuring video quality. MENU/EXIT button
ENTER button
Automatic termination
(connector with ““\- mark only)
The input connector is terminated at 75 ohms inside
when no cable is connected to the loop-through output
connector. When a cable is connected to an output
connector, the 75-ohm termination is automatically
released.
@ @POWER switch and indicator
Press to turn the monitor on. The indicator lights in
green.
To tum the power off, press this again.
a) Provided with the PVM-14N2A/14N2E/14N2U/20N2A/
20N2E/20N2U only.
@ MENU buttons
Press to make the menu appear.
For detailed information on MENU buttons, see “Operation
through On-Screen Menus”.
1) “Trinitron” is a registered trademark of Sony Corporation.
2) The NTSCas system refers to an NTSC color system in which the subcarrier frequency is modified to 4.43MHz. When
an NTSC recorded video program is played back with a Trident (PAL/SECAM/NTSC44s) VTR, the NTSC14 signal is
output.

Connections
Connect the AC power cord (supplied) to the ““AC IN
connector and to a wall outlet.
PVM-20N2A/20N2E/20N2U rear panel
oy
Connect the coaxial cable with the BNC connectors to
the BNC connectors on the rear panel as illustrated
below.
Insert the connector into the BNC
connector on the rear panel,
matching the slit and pin, and turn
the cable BNC connector clockwise
to secure the BNC connector of a
coaxial cable.
PVM-20N2A/20N2E/20N2U rear panel
Attaching the Splash-
Proof Covers
(PVM-14NIMDE only)
Tabs on the upper edge
Tabs on the
bottom edge -
In order to protect the ventilation holes from splashes
from medicines, etc., attach the supplied splash proof
covers as illustrated.
1 Hook the tabs on the upper edge into the
ventilation holes, making sure that the arrows on
the cover are facing down.
Attach the splash-proof covers on all ventilation
holes.
2 Push up the tabs on the bottom edge and fit the
cover into the lowest ventilation holes.
Attach covers on both left and right vents.

Location and Function of Parts and Controls
Ouwe A connectors
ore
(SSM-14N1E/14N1L/20N1E/20N1U only)
OLINE B
paca a ale
E> ©
-14N1A/14N1 E/14N1MDE/14N11/14N2A/1 4N2E/1 4N2U/20N1 A/20N1E/20N1 U/20N2A/20N2E/
@nrcs connectors
@REMOTE connector
Q~AC IN connector
(PVM-14N1MDE only)
~ AC IN
@cround terminal
@n~ac IN connector
(The “V\- mark indicates automatic termination.)
PVM-20N2A/20N2E/20N2U rear panel
@ LINE A connectors (PVM-14N1A/14NIE/
I4NIMDE/I4N1U/I4N2A/14N2E/14N2U/20N I A/
' 20N1E/20N 1U/20N2A/20N2E/20N2U only)
LINE connectors (SSM-I4N1 A/I4N1E/14N1U/
20N1A/20N1E/20N1U only)
Input connectors for the composite video, Y/C separate
video and audio signals and their loop-through output
connectors.
To monitor the input signal fed through these
connectors, press the LINE A button on the front
panel. (PVM-14N1A/14N1E/14N1MDE/14N1U/
L4N2A/14N2E/14N2U/20N 1 A/20N1E/20N 1U/
20N2A/20N2E/20N2U ONLY)
The Y/C IN connector has priority over the VIDEO IN
connector.
When connecting the cable to the Y/C IN connector,
the Y/C IN connector is automatically selected and the
VIDEO IN connector is disconnected even if the cable
is connected.
Y/C_EN connector (4-pin mini-DIN)
Connect to the Y/C separate output connector of a
video camera, VCR or other video equipment.
Y¥/C OUT connector (4-pin mini-DIN)
Loop-through output of the Y/C IN connector.
Connect to the Y/C separate input connector of a VCR
or another monitor.
When the cable is connected to this connector, the 75-
ohm termination of the input is automatically released,
and the signal input to the Y/C IN connector is output
from this connector.
VIDEO IN connector (BNC-type)
Connect to the video output connector of video
equipment, such as a VCR or a color video camera.
For a loop-through connection, connect to the video
output connector of another monitor.
VIDEO OUT connector (BNC-type)
Loop-through output connector of the VIDEO IN
connector. Connect to the video input connector for a
VCR or another monitor.
When the cable is connected to this connector, the 75-
ohm termination of the input is automatically released,
and the signal input to the VIDEO IN connector is
output from this connector.
AUDIO IN connector (phono jack)
Connect to the audio output connector of a VCR or
other equipment. For a loop-through connection,
connect to the audio output of another monitor.
AUDIO OUT connector (phono jack)
Loop-through output of the AUDIO IN connector.
Connect to the audio input connector of a VCR or
another monitor.
@ LINE B connectors (PVM-14N1A/14NI1E/
14NIMDE/14N1U/14N2A/14N2E/14N2U/20N 1 A/
20N 1E/20N 1U/20N2A/20N2E/20N2U only)
Input connectors for the composite video, Y/C separate
video and audio signals.
To monitor the input signal fed through these
connectors, press the LINE B button on the front
panel.
Y/C IN connector (4-pin mini-DIN)
Connect to the Y/C separate output connector of a
video camera, VCR or other video equipment.
VIDEO IN connector (BNC-type)
Connect to the video output connector of video
equipment, such as a VCR or a color video camera.
For a loop-through connection, connect to the video
output connector of another monitor.
AUDIO IN connector (phono jack)
Connect to the audio output connector of a VCR or
other equipment. For a loop-through connection,
connect to the audio output of another monitor.
© RGB connectors
(provided with the PVM-14N2A/14N2E/
14N2U /20N2A/20N2E/20N2U only)
Analog RGB input connectors for the R/G/B signals,
external sync signals and audio signals.
To monitor the input signal fed through these
connectors, press the RGB button on the front panel.
R/G/B (input) connectors (BNC-type)
Connect to the analog RGB outputs connectors of a
video camera, VCR or other video equipment. The
Monitor operates on the external sync signal.
The monitor also can operate on the sync signal from
the G channel by setting RGB SYNC to SYNC ON
GREEN in the menu.
For detailed information on sync signal setting, see “
RGB SYNC menu "on page 12 of “Functions of On-Screen
Menus”.
AUDIO IN connector (phono jack)
Connect to the audio output connectors of video
equipment when the analog RGB signal is input.
EXT SYNC (external sync input) connector
(BNC-type)
Connect to the sync signal output of a video camera,
VCR or other video equipment.
When you set RGB SYNC to SYNC ON GREEN in
the menu, the monitor operates on the sync signal from
the G channel so that it is not necessary to use this
connector.
For detailed information on sync signal setting, see “
RGB SYNC menu "on page 12 of “Functions of On-Screen
Menus”.
@ REMOTE connector (phono jack)
(provided with the PVM-14N2A/14N2E/
14N2U /20N2A/20N2E/20N2U only)
This connector functions as follows.
Open: When this connector is open, the current input
signal is selected.
Ground: By grounding this connector, the input
signal selected before this current signal is selected.
@ ~AC IN (iniet) connector
Connect the supplied AC power cord to this connector
and to a wall outlet.
© Ground (¥) terminal
(provided with the PVM-14N1MDE only)
Connect a GND cable.

Using On-Screen Menus
(PVM-14N1A/14N1E/14N 1MDE/14N10/14N2A/14N2E/14N2U/
20N 1A/20N1E/20N1U/20N2A/20N2E/20N2U only)
You can make various settings and adjustments of the
monitor using the on-screen menus.
The on-screen menu is composed of the following two
menu types.
Item selection menu
You can select an adjustment and setting item such as
sound volume, contrast, brightness, color intensity,
color system and menu language by using the 4.9 and
ENTER buttons.
Adjustment and setting menus
You can make desired adjustment or setting on
corresponding menu. The settings and adjustments
remain unchanged until next adjustment even if you
turn off the power.
To reset the settings and adjustments to the factory-
settings, select “ FACTORY PRESET” from 2d]USER
MEMORY menu.
On-screen menu tree-chart
item selection menus
Regular screen [1] MENU 1
{2] MENU 2
[3] MENU 3°
Adjustment and setting menus
[ia] VOLUME menu
[1b] CONTRAST menu
[1c }]BRIGHTNESS menu
CHROMA menu
[1e}PHASE menu
[22]COLOR SELECT menu
DISPLAY menu
[2c ]LANGUAGE menu
[2d] USER MEMORY menu
[3a] RGB SYNC menu”
[3b] ASPECT RATIO menu”
a) These menus 3], [3a] and [3b] ) are provided with PVM-14N2A/14N2E/14N2U /20N2A/20N2E/20N2U only.
Using On-Screen Menus
(SSM-14N 1A/14N1E/14N1U/20N1A/20N 1E/20N 1U only)
You can make various settings and adjustments of the
monitor using the on-screen menus.
The on-screen menu is composed of the following two
menu types.
Item selection menu
You can select an adjustment and setting item such as
sound volume, contrast, brightness, color intensity,
color system and menu language by using the #,@ and
ENTER buttons.
On-screen menu tree-chart
Item selection menus
Regular screen [1] MENU 1
Adjustment and setting menus
You can make desired adjustment or setting on
corresponding menu. The settings and adjustments
remain unchanged until next adjustment even if you
turn off the power.
To reset the settings and adjustments to the factory-
settings, select “FACTORY PRESET” from[2d| USER
MEMORY menu.
Adjustment and setting menus
[Ta] VOLUME menu
CONTRAST menu
[ic JBRIGHTNESS menu
[1d] CHROMA menu
[te] PHASE menu
COLOR SELECT menu
DISPLAY menu
[2c] LANGUAGE menu
USER MEMORY menu

[ib] CONTRAST menu (Factory setting: 60)
Adjust the contrast of the screen.
The contrast becomes higher by pressing the # button.
The contrast becomes lower by pressing $ button.
[1c] BRIGHTNESS menu (Factory setting: STD)
GRIGHTNESE: 37D
GBA oD
Adjust the brightness of the screen.
The screen becomes brighter by pressing the # button.
The screen becomes darker by pressing § button.
lid CHROMA menu (Factory setting: STD)
Adjust the color intensity of the video signal.
The color istensity strengthens by pressing the t
button.
The color intensity weakens by pressing $ button.
The color intensity of an composite video signal or a
Y/C separate signal can be corrected on this menu.
That of the RGB signals cannot be corrected.
PHASE menu (Factory setting: STD)
seer” ann
Adjust the phase of the video signals.
The skin tone becomes greenish by pressing the #
button.
The skin tone becomes purplish by pressing the ey
button.
The phase of an NTSC composite video signal or a
Y/C separate signal can be corrected on this menu. The
PAL composite video signal or a Y/C separate signal
and RGB signals cannot be corrected.
COLOR SELECT menu
(Factory setting: AUTO)
Select the color system of the input signal.
AUTO: Input color systems are automatically selected.
When you input NTSC signal, trap filter will
activate. To monitor NTSC signal with comb filter,
select NTSC COMB in this menu.
ay DISPLAY menu
Factory setting: SHORT TIME)
Select the period of displaying the color system of the
current input signals.
The items have the following functions.
SHORT TIME To display the kind of color system
being used for several seconds on
the screen each time you change the
signal input.
To display the kind of color system
being used for approximately five
minutes on the screen each time you
change the signal input.
Not to display the kind of the color
system.
LANGUAGE menu
Factory setting: ENGLISH)
LONG TIME
Select the menu language among the five languages,
English, German, French, Italian and Spanish.
Using On-Screen Menus
[2d] USER MEMORY menu
To store all adjustments and
settings currently set on each menu
into the internal memory.
To recat! all adjustments and
STORE
RECALL
settings currently stored in the
internal memory.
FACTORY To reset the adjustments and
PRESET settings currently set on each menu
to the factory settings.”
a) The current settings and adjusted values are reset to the
factory settings. The values and settings adjusted and
stored in the internal memory by using the STORE
menu, however, are not changed. To reset internally
stored adjusted values and settings to the factory setting,
select FACTORY PRESET, first, then select STORE.
When you press the ENTER (@) button, the following
message is displayed for about two seconds. The
currently selected item becomes active when pressing
the ENTER (@) button.
The following menus are provided with the PVM-
14N2A/14N2E/14N2U /PVM-20N2A/20N2E/20N2U
only.
RGB SYNC menu
(Factory setting: EXT SYNC)
Select the sync signal when the RGB signals are input.
The items have the following functions.
EXT SYNC. To operate the monitor on an external
sync signal fed through the RGB SYNC
connector.
SYNC ON To operate the monitor on the sync
GREEN signal from the G channel.
[3b] ASPECT RATIO menu
{Factory setting: 4:3)
Select the aspect ratio of the screen.

Menu operation buttons
There are four menu operation buttons on the front
panel of the monitor.
@ MENU/EXIT button
» ENTER button
Button functions depend on the displayed menu. The
following table shows the button functions on the item
selection menus and adjustment and setting menus.
@ MENU/EXIT | To return to the To retum to the
regular screen. item selection
menu.
To move the To decrease
cursor downward. } value/select item.
To move the To increase
cursor upward. value/select item.
©
ENTER
To
decide
a
To
decide
a
selected item. selected item”.
a) You can use the ENTER button only on the[2d]USER
MEMORY menu of the adjustment and setting menus.
Usable buttons depend on the displayed menu. Buttons
that can be used on the menu are displayed at the
bottom line of the screen. You can perform menu
operation using displayed buttons.
Usable buttons
Display of the usable menu operation buttons
Operating procedures
To display the menu, follow this procedure.
1 Press the MENU/EXIT (@) button.
MENU | appears.
To select items other than ones not displayed
on MENU 1
Select [2] MENU 2 or [3] MENU 3 ”.
For details of how to select, see the “To change the
item selection menus” described later.
2 Move the cursor to the desired item by pressing
the $ or ¢ (©, ©) button.
3 Press the ENTER (@) button.
The adjustment and setting menu selected in step
2 appears.
For detailed information of menus, see “Functions of On-
Screen Menus”.
1) [3] MENU 3 is provided with PVM-14N2A/14N2E/14N2U/20N2A/20N2E/20N2U only.
Using On-Screen Menus
To change the item selection menus
Select NEXT PAGE on the menu to display next item
selection menu and PREVIOUS PAGE on the menu to
display the previous item selection menu.
==» : When selecting NEXT PAGE
“- : When selecting PREVIOUS PAGE
a) MENU 3is provided with PVM-14N2A/14N2E/14N2U/20N2A/
20N2E/20N2U only.
How to change the item selection menu
To return to the item selection menu from the
adjustment and setting menus
Press the MENU/EXIT (@) button on the currently
displayed adjustment and setting menu.
To close the menu (to return to the reguiar
screen)
Press the MENU/EXIT (@) button when the item
selection menu is displayed. The on-screen menu
disappears and the regular screen appears.
item selection menus
[T]MENU 1
MENU | menu has the following selection items.
praca Sates
VOLUME To obtain the desired volume
CONTRAST To adjust the contrast
BRIGHTNESS To adjust the brightness
CHROMA To adjust the color intensity
[PHASE __| To adjust the phase
[2)MENU 2
MENU 2 menu has the following selection items.
3 e
COLOR To select the color system of the
SELECT input signal
DISPLAY To select period of display
LANGUAGE To select the menu janguage
USER MEMORY
[3] MENU 3
(for PVM-14N2A/1 4N2E/1 4N2U/20N2A/
20N2E/20N2U only)
MENU 3 menu has the following selection items.
: Cente
To store and recall the values and
settings adjusted by a user, and
recall the factory-settings
RGB SYNC To select the s
RGB signals are input
ASPECT RATIO To select the aspect ratio
Adjustment and setting menu
VOLUME menu (Factory setting: 50)
Adjust the speaker volume.
The volume increases by pressing the # button.
The volume decreases by pressing § button.

SECTION 2
DISASSEMBLY
2-1.
CABINET
REMOVAL
2-2.
A
BOARD
REMOVAL
1. Two screws
(Claw screw M4 x 8)
ae 4. Cabinet
20 inch only
| 3. Remove the PCB holder
with pulling up.
hh. Remove the screw
(3 x 12) (14 inch only)
2. Connector panel
2. Two screws Remove the connector panel
(Claw screw M4 x 8) pressing the bottom at BEZNET
which shows §.
3. Four screws
(BVTP 4 x 16)
2-3.
S
BOARD
REMOVAL
2-4.
SERVICE
POSITION
1. Remove the A board (Refer to 2-2)
1. Remove the connector (CN802).
N
4 3. Remove the S board.
2. Connector (CN602)

2-5. PICTURE TUBE REMOVAL
2. Connector panel
5. CA board (14 inch)
CB board (20 inch) Remove the two claws
20 inch only 14 inch only
3. PCBholder | Fo }}.} | |
6. Deflection yoke
7. Four screws
(Tapping screw 5) —@
8. Picture tube i SS
shield
2).
|
|
|
|
4. A board |
|
|
|
|
¢ INSTALLATION OF ANODE-CAP
9.
Picture
tube
_|
fe
hts
ea
_|
Point
1. Insert a point of anode cap into FBT (a hole).
2. Confirm that it does not fall out even if the anode
1.
Anode
cap
cap
is
pulled.
Cap
Install in order of 3-+2—+1 as shown in the illustration
V below and confirm that it does not fall out even if the cap
is pulled.
| FBT is pulled
Cushion a
¢°REMOVAL OF ANODE-CAP
NOTE: 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.
e REMOVING PROCEDURES
1. Turn up one side of the rubber cap 2. Using a thumb pull up the rubber cap 3. When one side of the rubber cap is
in the direction indicated by the arrow firmly in the direction indicated by the separated from the anode button, the
®, arrow ©. anode-cap can be removed by turning
up the rubber cap and pulling up it in
the direction of the arrow ©.
e HOW TO HANDLE AN ANODE-CAP
1. Don’t hurt the surface of anode-caps with sharp shaped material!
2. Don't press the rubber hardly not to hurt inside of anode-caps!
A material fitting called as shatter-hook terminal is built in the rubber.
3. Don’t turn the foot of rubber over hardly! ,
The shatter-hook terminal will stick out or hurt the rubber.

SECTION 3
SET-UP ADJUSTMENTS
3-1. PREPARATIONS (1)
Perform all adjustments after five minutes the power is turned
ON.
This set is provided with a service switch 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 both the [ENTER] key and [MENU] key
that do not display condition any menus. When ‘’ Ver ***” is
displayed on the screen, press the [ENTER] key twice.
(3)
Range of Service Mode Display
2. SERVICE MODE DISPLAY
(1) This is the seria! number for each of the service items.0-65.
(2) The service item a name displayed.
(3) This is the adjustment data for the service items that are now
stored in the RAM. Adjustments can be made by changing
these values, but as long as nothing is saved to the ROM the
adjustment values will be erased by turning off the power or
by input select, so please be careful.
(4) SAVE a displayed to the guidance.
3. FINISHING THE SERVICE MODE
Simultaneously press the [ENTER] key and the [MENU] key
shown in the display of the menu.
4. CHANGE OF SERVICE ITEMS
The item are returned with the [LINE-A] key and forwarded
with the [LINE-B] Key. When a key is continuously pressed, the
Operation will be repeated.
5. CHANGE OF SERVICE DATA
The service data is made larger with the [ ® ] key and smaller
with the [ % ] key. When continuously pressing the keys, the
operation will be repeated.
6. READING THE SERVICE DATA
For items with different adjustment data for each input line, re-
turn to the normal mode, switch the input , enter the service mode
again, and perform the adjustment.
For items with different adjustment data for every color stand-
ard, return to the normal mode, select COLOR SELECT in the
forcible mode, enter the service mode again, and perform the
adjustment.
7. WRITING OF SERVICE DATA
When writing data from the RAM to the ROM, press the [MENU]
key once and check that the SAVE display is shown in the guid-
ance, and then press the [MENU] key once again to display
SAVE JS. Not only the displayed data will be written, but all
data, so please be careful.
Note: The [LINE-A] and [LINE B] buttons of the A board must be
pressed after the service mode cabinet of SSM-14N1A/
14N1E/14N1U/20N1A/20N1E/20N1U is removed.
a 13 aes
Initial Setting of Service Data ROM
Common for Each Model
2Oinck
[00 BKUN | Peaking level undershoot__| __0| 0
[OT PKOV____| Peaking level overshoot | 0] 0
Peaking level for chroma red
peaking
Peaking level for chroma
Trap filter characteristic
05 CFS broad/narrow (Include
NTSC, PAL and SECAM)
H.center of composite signal
/% [wer | niga | |
| | wow senesced | 190| 190
urement reserved
a ee
disabled/enabled
| 09 | vaso | V. Blanking stop [___ 14] 14
| 10 [avst | Star of active video ——_[__17[ 17
| TT [AGCREF | Syne amplitude reference | 2D] __2DC|
= [pep] ooo
<*V CENT>
13 |VIDEO S-BRT_| Video sub bright {100100
RGB sub bright |__100{ _—100
RGB maximum contrast
15 RGB CONT (Adjust for max point of 10D
cont)
PCLPGT | Integral clamp loopgaim | a] 1.
'7_| CLPGP | Proportional clamp loop gain | _6| 6
D>
Current feed back pulse drive
*DRIVE LIMIT | (Define the size of feedback
pulse)
7
teresis
Fei i)
| KILVL
level
GAIN
SGAIN
BCLTHR
BCLTM
BCLG
27 BCLMIN
<32>
IF]
_
a
to
~
N pre) Vv
defines the time constant of
IF2 AFC from IF-1 and IF-2
which make movements for
AFC of H)
Red cutoff
38)<39>
39)<40)>
*R C/O
*G C/O
Threshold level for beam [13E}
current limiter (BE)<82> |(E1)<E5>
rent limiter
Loop gain for beam current [808] [809]
Minimum contrast for beam
current limiter (Define the oo
value of contrast)
INTLC | Intertace offset | SO
Correction level for zooming [2A]
HTM [6}6)<3>
(SLCLVL) (89C)[__(89C)
<SVWINI> <7>
<SVWIN2> <FFC>
Proportional H-PLL gain(H-
PLL defines the time con-
stant of AFC from IF-1 and
{F-2 which make movements
for AFC of H)
Integral H-PLL gain (H-PLL .
| Greencutoff ||
— Continued on next page —
47
43
= =
= om)
= a
s 2
A A B tm = B v Vv
*
w
QO
~~
2)
On
i

B
e)
ae {dinch] 20inch |
SSi>[*HSIZE | Hsize ———*+i|_—~BBY~——ic
51)<52>| ®PIN PHASE
52)<53> | PIN AMP
53)<54>|*H SEXY PIN | H. sexy pin | FE,
34)<55>[ #1 COR PIN
(55)<56> Initial value for V.center '}
PVsize [Vise SCdYSCCSC*S
57)<58>|*V LIN DOWN | V. linearity down
38)<5>| *V LINE UP__| V.linearity up ——*«|~_—~#E
59)<60>| CHROMA
(64) (COMB) gs for NTSC comb fil- (C3)
<65> |*<DA TRIM> Trimming level for video
output
Exclusive to Each Model
With | Without
[No.| vise | TEM | Ras | RG
MODEL Model selection aa es as
“~~
Ly an
——
A
tA
“J Vv
*
< Ss res
Setting for Each Input
re ITEM ANALOG-RGB
20inch
*R DRIVE
(36)<37> Green drive 2A | IES | 2A |
(37)<38>|*B DRIVE | Bluedrive =< | SB] 186 | IBS |
Clamp timing for RGB
Timing between sync and fly
*R C/O REF | Red cutoff reference
*G C/O REF | Green cutoff reference
(62)<63>| *B C/O REF Blue cutoff reference | 50 |
Setting for Each Line Frequency
(43)<44>| PMST___|_ Picture measurement start [ 14[ 14
(44)<45>] PMSO | Picture measurement stop | ==F9 [| 132 |
Measurement line for beam
(45)<460| TML current feed back (The posi-
tion of beam current feed-
back pulse is changeable)
(47)<48>| HBLK2 | Hblankingstat = (“ss| OT
Setting for Each Color Standard
NTSC 358 NTSC
NO.
N i 9
i 7
TSC tint angle | FFF {| A8{| oo -[ - Je
(49)<50>} L/C DELAY | Luminance/chroma dela
Note:
1. Each IC version has its own displays of service mode. Refer to the
followings.
No mark : common ,
( ) : Ver 1.20/1.30/1.40
< > : Ver 2.00
{ ] : for V901 (black CRT)
* V901 has been changed from a gray CRT to a black CRT.
Refer to SECTION 8. Electrical Parts List on page 71 for the list of
serial numbers.
2. The data with marking “*” to the name of signal can be changed freely.
The data without marking “*” is a fixed data.
14

3-2. PREPARATIONS (2)
*
When
composite
video
signal
are
supplied,
they
must
be
sup-
plied as below.
a Signal Contents
100% WHITE 0.714V
75% WHITE 0.536V
BURST 286mV
(632mV)
Standard Level
P-W
358NT
443NT
(GREEN)
(This item only P-P)
100% WHITE
75% WHITE
PAL
SECAM PAL BURST
(GREEN)
(This item only P-P)
* In this document, terms inside boxes [__lare names of service
mode adjustments.
Example |H. SIZE
After making adjustments in service mode, save the adjustment
data before cutting off the power. If you cut off the power with-
Out saving, the results of your adjustments are all lost.
COMPOSITE
VIDEO
*
*
Standard inspection conditions
Unless specifically specified otherwise in this document. the
following conditions are used for adjustments and inspections.
VOLUME 50%
CONTRAST 60%
BRIGHTNESS STD
CHROMA STD
PHASE STD
ASPECT RATIO 4:3
3-3. WRITING MODEL DATA
1. In service mode, write in the following model data at No. 63
3
PVM- I4NIA PVM- I4N2A SSM- I4NIA
I4NIE 14N2E I4NIiE
I4NIMDE 14N2U 14N1U
‘any: . |e" SONG el sONtA Poe 0
20N1A 20N2E 20N1E
20NIE 20N2U 20NIU
20N1U
3-4. PICTURE OUTPUT
1. Set the AC input voltage.
(1)
Input
the
video
and
audio
signals
to
the
corresponding
terminals on the connector panel.
(2) Set the sliduck voltage as shown on the right.
PVM- 14NIU/14N2U/
20N1U/20N2U
SSM- 14N1U/20N1U
Voltage
AC120 + 3V
(Distortion rate: 3% or less)
PVM- 14N1A/14NIE/
14N1IMDE/
14N2A/14N2E/
20N1A/20N1E/
20N2A/20N2U
SSM- 14N1A/14N1E/
20N1A/20NIE
AC220 + 3V
(Distortion rate: 3% or less)
. LANDING ADJUSTMENT
1. Preparations
1) To reduce the influence of geomagnetism, face the set’s CRT
screen east or west.
2) Loosen the deflection yoke fixture and lower the deflection
yoke to the rear.
3) Switch on the Power switch and degauss with the degausser.
4) Adjust the deflection yoke tilt.
5) Switch (S501) position is center.
2. Adjustment
1) CONTRAST ....... MIN
BRIGHTNESS.... Position providing good vision
2) The rough adjustments of the white balance, G2, and
convergence must be completed already.
3) Set green-only.
4) Adjust the purity knob so that the green comes to the center
of the screen. Make the red and blue about even. Fig. 1
5) Switch to blue only, red only, and green only and verify each.
Fig. 1, 2, and 3
6) Bring the deflection yoke gradually forward and adjust the
deflection yoke so that the R and B at both sides of the screen
become green. Fig.2—+3
7) If the deflection yoke comes too far forward, you will see the
pattern shown in Figure 4. If that happens, lower the
deflection yoke to the rear. Fig. 4—+3
8) Switch the single color switch to B and verify the single color.
Fig.6
9) Switch the single color switch to R and verify the single color.
Fig.9
When one of the colors does not become the single color cor-
rectly, check by repeating items 7 and 8 based on the single
color not coming into adjustment.
If you can not obtain landing in the corners, paste on mag-
nets.
11) Switch to an all-white signal and check the uniformity.
12) When the deflection yoke position is determined, fasten it
with the fixture.
10
——

14 ineh 3-6. CONVERGENCE ADJUSTMENT
1. Input a dot pattern signal.
Purity control CONTRAST ....... Position providing good vision
Purity control BRIGHTNESS... MIN
2. Align the horizontal R, G, and B dots at the center of the
screen with the H-STAT VR. (*1)
*1: If the H-CENTER adjustment was after the H-STAT
adjustment, re-adjust the H-STAT.
(The H-CENT SW changes the H-STAT too.)
3. Align the R, G, and B at the center of the screen with the
V-STAT magnets. (*2)
*2: After the V-STAT adjustment, paint on the knobs to lock
them.
<>
A B
20 inch
x
Purity control PUY Cone!
Y Y
Good example Bad example
V-STAT magnet knobs If the A and B knobs are not
While keeping the angles symmetrical (I=I’), this has
for A and B equal (I=I’), bad effects. The focus may de-
align the vertical conver- teriorate and beam striking
gence. may occur.
4. ForHMC, use the 6-pole magnet to adjust the R and B dots to
be symmetrical left and right about the G dot. (*1)
‘s 1 I /
A'= Ss “
4 » 4 oa R G B
A A' Fig. 1 :
A B
A A'
—_ - | «>
Fig. 2 Fig. 3 Fig. 4
6-pole magnet
The HMC adjustment Adjust the 6-pole magnet so
changes the opening of the that A=A’. You must maintain
6-pole magnet. the relationship I=I’ while
moving the magnet.
Fig. 5 Fig. 6 Fig. 7
Fig. 8 Fig. 9 Fig. 10

14.
15.
16.
17.
18.
19.
20.
21.
22.
22.
24
Press the [ENTER] key once to show the C/O REF screen.
C/O REF Screen
BC/OREF GC/OREF RC/OREF
Numeric values are displayed in hexadecimal value.
(Numeric values in the figure are examples.)
Check that B C/O REF and G C/O REF and R C/O REF lev-
els gather at the center of 0-FF (hexadecimal value). (Note 1)
(Note 1)
FF (hexadecimal value) —- (R C/O REF)=(B C/O REF)
If the level is shifted from the center, press the [ENTER] key
three times to return to the adjustment mode, and adjust
to return to 14.
When
is
increased,
also
in-
creases.
Save the data.
Check
the
:
values
on the C/O REF screen, and note them on a piece of paper,
etc. Next, press[ENTER | twice to set the adjustment mode.
Change the , and
values to the values checked before, and save them.
Save the data.
Exit the service mode.
Select the RGB input. (Note 2)
(Note 2) Press the [RGB] key for the model with RGB.
Short-circuit between S006 and GND once for the
model without RGB (including SSM series).
Enter the service mode.
Set
the
values
of
[R
DRIVE],|G
DRIVE]
and
[B
DRIVE
|deter-
mined in step 9, 10 to [R DRIVE],[G DRIVEland[B DRIVE].
Set the values of {[G C/O REF], and
determined in step 17 to [R C/O REF], , and
;
. Save the data.
25. Exit the service mode.
26. Return the input to LINE-A. (Note 3)
(Note 3)
As for the SSM series, press $008 on the board A.
3-10. FOCUS ADJUSTMENT
Note :PVM-14 inch models are adjusted with RV702 on the CA
board.
PVM-20 inch models are adjusted with RV on the upper side
of the FBT unit.
1. Input a 525 monoscope signal.
2. Adjust the focus to optimize the focus on the characters “30”
at the center of the screen.
3. Switch to an all-white signal and check the uniformity.

2. Insert the wedges into the DY and CRT funnel face to fix the
DY. The number and position of the wedges are shown in the
figure below.
Position of 14 inch wedge Position of 20 inch wedge
3. The pattern below can not be corrected by turning the neck.
*Gun rotation
The beam is twisted at both
sides on the X axis and Y axis.
*HCR large (small)
At both sides of the screen the
G raster horizontal compo-
nent is wider (narrower) than
those of the R and B rasters.
*VCR large (small)
At both sides of the screen,
the G raster vertical compo-
nent is wider (narrower) than
those of the R and B rasters.
3-8. G2 ADJUSTMENT
1. Input the 625 or 525 all black signal.
2. Select the voltage shown below for each R, G, and B cath-
odes.
14 inch—>DC175.0V
20 inch—DC160.0V
3. Adjust G2 VR so that the raster is slightly luminous.
3-9. WHITE BALANCE ADJUSTMENT
This manual performs control of the white balance using the mi-
crocomputer, that not only the white balance adjustment of actual
images, but also the data adjustment and saving for controlling the
microcomputer are needed.
To adjust the white balance, first adjust the white balance of the
actual images using ; : and ;
‘ [B DRIVE]. Then adjust so that the
reference data and , the
microcomputer performs control, are together into the center of 0-
FF (hexadecimal)...
After that, save the adjusted [DRIVE LIMIT], setting the reading
of CO on the C/O REF screen to [R C/O REF 1G C/O REF], [B C/
O REF] and saving them are needed.
For measuring equipment, use a color analyser (for example from
Minolta, etc.).
For signals, use a gray signal (Figure 1) for the cutoff adjustment
and a window signal (Figure 2) for the driving adjustment.
(Figure 1)
(Figure 2)
0.7 Vp-p
20 psec
1. Set contrast 50 and other settings to the standard level.
2. Set the LINE-A input.
3. Enter the service mode.
4. Input a gray signal (Figure 1) to LINE-A.
5. Adjust |G C/O] so that the luminance becomes 3+0.2 nit.
6. Adjust and [B C/O] so that the white balance becomes
the color temperature shown in Table 2 as below.
7. Repeat 5 to 6 until the luminance and color temperature meet
the specification.
8. Input the window signal (Figure 2) to LINE-A.
9. Adjust so that the luminance becomes 12041 nit.
10. Adjust and so that the white balance
becomes the color temperature shown in Figure 2.
11. Repeat 9 to 10 until the luminance and color temperature meet
the specification.
12. Cutoff is shifted when drives are changed. Therefore, repeat
4 to 11 for the drive and cutoff until the luminance and color
temperature meet the specification.
13. Save the data.
Table 2
Color Temp D65 + 1 IND

5. For VMC, use the 6-pole magnet to adjust the R andBdotsto 3-7. DEFLECTION YOKE NECK ROTATION
be symmetrical above and below the G dot. (*2) ADJUSTMENT
#9: If there is misconvergence at both sides on the X or Y axis of the
screen, turn the neck of the deflection yoke in the direction of the
R G B Ae arrow to reduce the misconvergence for the entire CRT screen to
within the tolerance.
. FIX ; 1. Reverse misconvergence pattern
LY ’
o
t Reverse cross Regular cross misconvergence
Y misconvergence pattem pattern
bottom
section
downward.
upward.
Move the deflection yoke Move the deflection yoke
6-pole magnet
The VMC adjustment does not
change the opening of the 6-
pole magnet, but turns it left 24 Adjust so that the displacement
and right. up and down are the same.
: ; ; ; Pattern of left-sided Pattern of right-sided
6. Adjust by repeating the adjustments in Items 2 through 5. deflection yoke deflection yoke
(*3)
*3: The above adjustment may affect the landing, so after Move the deflection » Move the defiection
; : : : ; : yoke to the right when yoke to the left when
this adjustment, check the landing again. viewed from the CRT viewed from the CRT
7. After the adjustment is complete, paint on the knobs to lock screen. screen.
them. L L L L
R B B R B R R B
V.STAT magnet
Purity
20 inch

SECTION 4
SAFTY RELATED ADJUSTMENT
(US Model only)
The
following
adjustments
should
always
be
performed
when
HOLD-DOWN
CIRCUIT
VOLTAGE
CONFIRMATION
replacing the following components (marked with B4, Id on the
schematic
diagram).
Check
Condition
Input
voltage
:
130+3V
Input signal : Monoscope signal
Control : BRT & PIC Normal
+B voltage : less than 116.0VDC
Marking Parts (b4) .... C501, C502, C503, C504
Marking Parts ([@ ) .... C317, C318, C501, C502, C503, C504,
C507,
D102,
D103,
L505,
Q102,
R107,
Hold
down
circuit
(Tertiary
coil
detection
voltage)
R108,
R110,
R304,
R305,
R306,
R307,
Confirmatory
item
:
95.0V
(14
inch),
125.0V
(20
inch)
voltage
T501,
ICOO1,
1C301
should
be
applied
to
the
cathode
side
of
D103.
|
B+
VOLTAGE
CONFIRMATION
a)
When
Iasi
=
600
+
SOMA
(14
inch),
1000
+
SOLA
(20
inch)
raster goes out when applying less than DC 116.0 + 0.2V
Standard
:
less
than
116.0VDC
(14
inch),
153.0
+
0.2V
(20
inch)
voltage
to
the
cathode
side
Check Condition Input voltage : 130 +2 VAC of D103.
Note : Use NF Power Supply or make
sure that distortion factor is 3% Input signal: ALL white
or less.
Input
signal
:
Monoscope
signal
b)
When
Ian.
=40
+
20nA
(14
inch),
120
+
20U/A
(20
inch)
raster
Controls
:
BRT
&
PIC——>
Normal
goes
out
when
applying
less
than
DC
124
+
0.2V
(14
inch),
153.0 + 0.2V (20 inch) voltage to the cathode side of D103.
Input signal : Dot
A BOARD (CONDUCTOR SIDE)
DC power supply Hill