Sony Trinitron PVM-1341 User manual

SERVICEMANUAL
Videosignal
Frequency response
Line input More than 7 MHz (-3 dB)
Y/C input: More than B MHz(-3 dB)
Component (Y/R-Y/B-Y):More than BMHz
(-3dB)
R.G.B. (analog): More than 9 MHz (-3 dB)
Chrominance subcarrier attenuation
3.58 MH_z:Less than -30 dB (comb filte~
4.43 MHz: Less than -36 dB (trap filter)
Band pass 3.58 MHz:2 MHzequiband
4.43 MHz: 2 MHz equiband
Chrominance/luminance
Time error
Composite: Less than ±100 nS
S.Video: Less than ±50 nS
Component: Less than ±50 nS
Aperture correction-4.5 to +6.5 dB (at 4.5 MHz)
Synchronization AFC time constant: 1msec
Line pull range Horizontal:±500Hz
Vertical: 8 Hz
Pictureperformance
Normal scan
Underscan
H.lineality
7% overscanof CRT effective screenarea
3% underscanof CATeffective screenarea
V. lineality
Convergence
Lessthan4%
Lessthan5%
Central area: 0.6 mm
Peripheral area:'0.8 mm
Raster size stability -
H: 1.0%, V:1.5%
High voltage regulation
Audio output
CRT
3%
0.6W(Max.)
PVM-1343MD/PVM-1342Q:
SMPTE-C (American-standard-phosphor}
PVM-1341: P-22
Chromacity coordinates (SMPTE-C only)
X y
Red 0.630 0.340
Green 0.310 0.595
Blue 0.155 0.070
(tolerance ±0.01)
Color temperature 6,500°K/9,300°K (+BMPCD), selectable
AC regulation range
110-130V AC, 50/60 Hz
Power consumption
Approx.99W
r:JiL"O'
0000 ~~. 000000
0000 ~~ 000000°
SPECIFICATIONS
Inputs
VIDEO IN: BNC connector
AUIO IN: phono jack
VTA:8-pin connector
Y/C-INPUT
VIDEO:4-pin DINconnector
AUDIO: phono Jack
EXTSYNC: BNC connector
US Model
Canadian Model
PVM-1341
ChassisNo. SCC-C27A-A
PVM-1342Q
ChassisNo. SCC-C25A-A
PVM-1343MD
ChassisNo. SCC-C28A-A
composite sync 14 Vp-p,negative, 75 ohms terminated
automatically with no cable connected to the output
connector
ANALOG RGB: BNC connector
0.7Vp-p,±6 dB, non comp9site
75ohms terminated automatically with no cable connected to
the output connector
DIGITAL RGB: 9-pin connector
CTRLS: Minijack
Outputs
VIDEO OUT: BNC connector
Loop-through
AUDIO OUT: Phono jack
Loop-through
EXTSYNC: BNC connector
Loop-through
ANALOG RGB: BNC connector
Loop-through
CTRLS:Minijack
Loop-through
General
Dimen·sions
Weight
Approx. 346x 340 x412 mm (w/h/d)
(135/8 x 131/zx 161/~ inches)
Approx. 16.5 kg(36 lb 6 oz)
- Continued on next page -
TRINITRON@COLORVIDEOMONITOR
SONY

IPinassignmentI
DIGITALRGBconnector(9-pin)
@
PinNo.
1
2
3
4
5
6
7
8
9
-
1 2 3 4 5
0 0 0 0 0
0 0 0 0
6 7 8 9 @
Signal
GND(ground)
GND for the signal
Red input
Green Input
Blue input
Intensity
NC(no connection)
H·SYNC (If V-SYNC Is not Input to the 9th pin, composite
sync should be Input to this pin.)
V-SYNC
If the intensity function of Pin No. 6 is not used, set the
internal switch on the Qd board to the Elposition, and
connect the Pin No. 6 to the GND. With this setting, when the
positive intensity signal synchronized to the characters on
the screen Is fed, the luminance of the characters will be
increased.
VTRconnector(8-pin)
PinNo. Signal
1 Audio input
2 Vldeoinpur
3 GND
4 NC
5 GND
6 GND
7 GND
8 GND
YIC(YICseparate)INPUTconnector(4-pin)
PinNo. Signal
1 Y-lnput
2 CHROMA sub-carrier-input
3 GNDtor Y-input
4 GNDtor CHROMA-input
* Slot for Internal switch
Design and specifications subject to change without notice.
Signallevel
Ground
Ground
Positive polarity (TTL level)
I
I
High state (open), Low state (ground), Positive polarity
-
Positive or negative polarity (TTL le11el)
Sarnepolarity as H-SYNC(TTLlevel)
Ifthe specific intensity function, such as that of an IBM
microcomputer, is used, set the internal switch on the Qd
board to the A position, and feed the intensity control signal
to Pin No.6.
Description
-5 dBs, high input impedance (more than 47 kilohms)
Composite 1 Vp-p, sync negative, 75 ohms
GND
-
GND
GND
GND
GND
Description
1Vp-p, sync negati'le, 75 ohms
300mVp-p,burst
Delay time betwe.enYandC:within 0±100nsec., 75ohms
Ground
Ground
Press the switch Inside this slot. The signal from VIC-INPUT
connector has priority over the one from VTA (8-pin)
connector.
-2-

·,j
PVM-1341 /1342Q/1343MD
SAFETY CHECK-OUT
(US Model Only}
After correcting the origin::il s.ervice problem,
perform the following safety checks before releasing
the set to the customer:
I . Check the area of your repair for unsold.ered or
poorly-soldered connections. Che-ck the· entire
board surface for solder splashes and bridges.
2. Check the interboard wiring to ensure that no
wires are "pinched" or contact high-wattage
resistors.
3. Check that all control knobs, shields, covers,
ground straps, and mounting hardware have
been replaced. Be absolutely certain that you
have replaced all the insulators.
4. Look for unauthorized replacement parts, par-
ticularly transistors, that were installed during a
previous repair. Point them out to the customer
and recommend their replacement.
5. Look for parts which, though functioning. show
obvious signs of deterioration. Point them out
to the customer and recommend their replace-
ment.
6. Check the line cord for cracks and abrasion.
Recommend the replacement of any such line
cord to the customer.
7. Check the condition of the monopole antenna
(if any).
Make sure the end is not broken off, and has
the plastic cap on it. Point out the danger of
impalement on a broken antenna to the
customer, and recommend the antenna's
replacement.
8. Check the B+ and HV to see they are at the
values specified. Make sure your instruments
arc accurate; he suspicious of your HV meter
if sets always have low HV.
9. Check the antenna terminals, metal trim,
"metallized" knobs, screws, and all other
exposed metal parts for AC leakage. Check
leakage as described below.
0.15µF
To Exposed Metal
Parts on Set
1.5kH
-::- Earth Ground
AC
voltmeter
(0.75V)
Fig. A. Using an AC voltmeter to check AC leakage.
-3-
LEAKAGE TEST
The AC leakag~ from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 0.5 mA (500 microampers). Leakage
current can be measured by any one of three
methods.
1. A commercial leakage tester, such as the
Simpson 229 or RCA WT-540A. Follow the
manufacturers' instructions to use these instru-
ments.
2. A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
this job.
3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter. The "limit" indication is 0.75 V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2 V AC range are
suitable. (See Fig. A)
HOW TO FIND A GOOD EARTH GROUND
A cold-water pipe is guaranteed earth ground; the
cover-plate retaining screw on most AC outlet boxes is
also at earth ground. If the retaining screw is to be
used as your earth-ground, verify that it is at ground
by measuring the resistance between it and a cold-
water pipe with an ohmmeter. The reading should be
zero ohms. If a cold-water pipe is not accessible,
connect a 60-100 watts trouble light (not a neon
lamp) between the hot side of the receptacle and the
retaining screw. Try both slots, if necessary, to locate
the hot side o~ the line, the lamp should light at
normal brilliance if the screw is at ground potential.
(See Fig. B)
Trouble Light
-: AC Outlet Box Ohmmeter
Cold-water Pipe
Fig. 8. Checking for earth ground.

>VM-1341 /13420/1343MD
TABLEOF CONTENTS
1. GENERAL
1-1. Features······ ······················································5
1-2. Location and Function of Parts and Controls···6
2. DISASSEMBLY
2-1. Rear Cover and Top Cover Removal·················9
2-2. Terminal Board Remova1····································9
2-3. Bracket of Terminal Board Removal ................ 10
2-4. Control Unit Removal..:................................... 10
2-5. Picture Tube Removal ..................................... 11
3. SET-UP ADJUSTMENTS
3-1. Beam Landing ................................................ ·12
3-2. Convergence .................................................... 13
3-3. Focus· ....············ ..·...···......... ········· ....·..··........ ·14
3-4. White Balance ...... ·..············· ·..···..··..... ·..···..·... 15
4. SAFETY RELATED ADJUSTMENTS ..··················· 17
5. CIRCUIT ADJUSTMENTS
5-1. A Board Adjustments····'································· 19
5-2. XA Board Adjustment ..................................... 22
5-3. BA Board Adjustments ·
(PVM-1342O, 1343MD ONLY)························23
6. DIAGRAMS
6-1. Frame Schematic Diagram ·······························25
6-2. Block Diagrams·············· .................................. 23
6-3. Printed Wiring Boards ..................................... 36
6-4. Circuit Boards Location ................................... 41
6-5. Schematic Diagram .......................................... 41
6-6. Semiconductors····································· ..·········62
7. EXPLODED VIEWS
7-1. Chassis ............................................................ 65
7-2. Picture Tube ................................................... 66
8. ELECTRICAL PARTS LIST .................................... 67
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 CON.
NECTED TO THE AC POWER LINE.
SAFETY.RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK
L'.hON 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 PRO:
CEDURES WHENEVER CRITICAL COMPONENTS ARE
REPLACED OR IMPROPER OPERATION IS SUSPECTED.
PVM-1343MD ONLY
-4-
NotesonLeakage
CurrentMeasurement
This measurement should be done only by B.E.D.
(Biomedical Engineering Department) technician in a
hospital.
Leakage current of this model should be measured in
accordance with UL 544, Item 27.
Important points in leakage current measurement are given
below.
For further information, refer to UL 544of UL standards.
• This model is for patient care equipment which
corresponds to UL 544.
• For measurement, use the SA 1116input circuit described
in paragraph 27.5of UL 544.
• The measurement procedure is described in paragraphs
27.5-27.13 of UL 544.
• When leakage current is measured, the waveform of the
current must be sinusoidal and must not contain high
frequency components (above 1kHz).
In order to check this, connect an oscilloscope to both
ends of the input circuit connected to the equipment, and
observe the waveform.
A) If high frequency components (above 1kHz)of a clear
level are found, refer to paragraph 27.5of UL 544.
B) If high frequency components (above 1kHz)of an
unclear level are found, pull out the F·5connector on the
F printed wiring board.
ATTENTION!!
AFIN D'EVITER TOUT RISQUE D'ELECTROCUTl<JN
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 AL'ALIMENTATION SECTEUR.
ATTENTION AUX COMPOSANTS RELATIFS A LA
SECURITE!!
LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET
PAR UNE MARQUE &suR LES SCHEMAS DE PRINCIPE,
LES VUES EXPLOSEES ET LES LISTES DE PIECES
SONT D'UNE IMPORTANCE CRITIQUE POUR LA
SECURITE DU FONCTIONNEMENT. NE LES REM-
PLACER QUE PAR DES COMPOSANTS SONY DONT LE
NUMERO DE PIECE EST INDIQUE DANS LE PRESENT
MANUEL OU DANS DES SUPPLEMENTS PUBLIES PAR
SONY. LES REGLAGES DE CIRCUIT DONT L'IMPOR-
TANCE EST CRITIQUE POUR LA SECURITE DU
FONCTIONNEMENT SONT IDENTIFIES DANS LE
PRESENT MANUEL. SUIVRE CES PROCEDURES LORS
DE CHAQUE REMPLACEMENT DE COMPOSANTS
CRITIQUES, OU LORSQU'UN MAUVAIS FONCTIONNE-
MENT EST SUSPECTE.

I
01
I
1-1. FEATURES
This chart shows the various features which your model has (indicated as "Yes").
Features PVM-1343MD PVM-13420
Automaticwhttebalancecircuit Yes Yes
SMPTE-Cphosphor Yes Yes
Black-tintedTrinitrontube No No
Super Fine Pitch Trinitron picture tube Yes Yes
AnalogRGBinput/output Yes Yes
Y/C input (4-pin DIN) Yes Yes
VTR input (6-pin) Yes Yes
ControlS inpuVoutput Yes Yes
Automatic termination of BNC-type input connectors Yes Yes
Color systems available PAL,SECAM,NTSC3.58NTSC4.43
Colorpurefilter Yes Yes
Blueonly mode Yes Yes
Underscan mode Yes Yes
Horizontal/verticaldelay mode Yes Yes
External sync input Yes Yes
Colortemperatureselector Yes Yes
Light-touchpicture adjustmentbuttons Yes Yes
EIAstandard19-inchrack mounting Yes Yes
Digital RGBinput (9-pin) Yes Yes
PVM-1341
Yes
No
Yes
No
Yes
Yes
Yes
Yes
Yes
NTSC3.58only
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
SECTION 1
GENERAL·
Automaticwhilebalancecircuit
Theautomaticwhite balancecircuit compensatesfor the
beamdistortion,seculardistortion of lhe cathode.raytube,
etc., and always reproduces the same white display on the
screen.Thisallows anextendeduseof the monitvi.
SuperFinePilchTrinitronpicutretube
(PVM·1344Q/PVM-1343MD/PVM·1342Qonly)
TheSuperFinePitchTrinitronpicture tube (0.25mm aperture
grill) gives high resolution picture. Horizontal resolution is
more than 6(X) TV lines at the center of the picture. When
used as a character display, up to 2,000 characters (80
characters/line x 25 lines} can be displayed with great clarity.
AnalogRGBconnector
AnalogRGl3signal of avideo equipmentcan be input
throughthis connector.
Y/CInputconnector
Thevideosignalsplit into the chrominancesignal(C)and the
luminancesignal(Y)canbe inputthrough this connector,
eliminating the interference between the two signals which
tends to occur in a composite video signal and assuring the
videoquality.
VTRInputconnector
Whenconnectedto aVCRhavingthe 8-pinTVconnector,
videoand audiosignals can be fedthrough this connector
with a single cable.
ControlS connector
When this connector is connected to the "control S" output
of other equipment, the remote controls of the aperture,
brightness, chroma, phase, contrast and volume settings are
possible.
Automatictenminalionof BNC-typeinputconnector
TheBNC-typeinput connectoris terminatedat 75ohms
inside, when no cable is connected to the output connector.
Whenlhe cableis connectedto lhe output connector,the
75-ohms termination is automatically released, and the
signal input to the corresponding IN connector is output
from the output connector.
Fourcolorsystemsavailable
(PVM-1343MD/PVM-1342Qonly)
ThemonitorcandisplayPAL,SECAM,NTSC3.58and
NTSCt43• signals. The appropriate color system is selected
automatically.
• A signalof NTSC4.43lsobtainedbyplayingback NTSC-
recorded video cassettes with a video tape recorder/player
especiallydesignedfor usewilh this system.
"
ColorpureFilter
WhenNTSCvideosignalsarereceived,acolorpurefilter
aclivatesto increasethe resolutionabout35%,resultingin
fine picture detail without color spill or color noise.
Blueonlymode
In the bjue only mode, an apparent monochrome display is
oblained with all threecathodesdrivenwith a blue signal.
This facilitates color saturation and phase adjustments and
observationof VCRnoise.
Underscanmode
The signal normally Scanned outside of the screen can be
monitored in the underscan mode.
Horizontal/verticaldelaymode
Thehorizontalandverticalsync signals can be checked
simultaneouslyinthe HN delaymode.
ExternalsyncInput
Whenthe EXTSYNC(orANALOG/DIGITAL(EXTSYNC))
bullon is depressed,themonitor can be operatedonthe
sync signal supplied from an external sync generator.
Colortemperatureselector
Colortemperatureofeither9,300°Kor6,500°KIsselectable
wilh theCOLORTEMPselector.Forpreciseadjustment,use
the BIASand GAINadjustmentcontrols (exceptPVM-1340).
Light-touchpictureadjustmentbuttons
Theaperture,brightness,chroma,phase,contrastand
volumebuttonscan beadjustedbytouching thebuttons
lightly. The adjusted settings will be stored in memory even
when the monitor is turned off.
EIAstandard19-inchrackmounting
Byusinganoptional MB·502Amounting bracket,the monitor
canbe mountedin an EIAstandard 19-inchrack.An optional
SLR·102slide railis alsoavailable.Fordetails on mounting,
seetheappropriale.instruction manual.

I
Q')
I
1-2. LOCATION AND FUNCTION OF PARTS AND CONTROLS
IFrontpanelI
~
W' • J 181'!I
,...,,
.i l a I
-l
I
rn
.1,
.!.
J..,
6
7
B
J..,
12
13
.1_4_,
15
16
11
BIASandGAINadjustmentcontrols
RESETbuttonandresponseIndicator
APERTUREbuttons
BRIGHT(brightness)buttons
CHROMAbuttons
PHASEbuttons
CONTRASTbuttons
VOL(volume)buttons
POWERs",itch and Indicator
H-VDELAYbutton
UNDERSCANbutton
BLUEONLYbutton
Colorsystemindicators(exceptPVM-1341)
INPUTselectbuttons
ANALOG/DIGITAL(EXTSYNC)button
[I]BIASandGAINadjustmantcontrols
Usedfor whitebalanceadjustment.
Gainand BIAScontrols areprovidedtor the R (red),G
(green)and B(blue)screens.
BIAS:Adjust thewhite balanceandbrightnessof the
· screenat the lowlight with thesecontrols.
GAIN:Adjustthe white balanceandcontrast of the
screenat the highlight with thesecontrols.
[1]RESETbuttonandresponseIndicator
Pressto returnthePHASE,CHROMA,BRIGHTand
APERTUREcontrol settings to the factoryset levels.
TheresponseIndicatorflasheswhentheabovebuttonsor
the RESETbutton is pressed.
[l]APERTUREbuttons
Press+formoresharpnessor- for fess.
[!)BRIGHT(brightness)buttons
Press+ formorebrightnessor- for less.
[1)CHROMAbuttons
Press+ for morecolor Intensityor - for less.
11]PHASEbuttons
Thisbutton is effectiveonly for the NTSC3.58and NTSCl.43
colorsystem.
PressGRN(green)to maketheskintonesgreenishor
PUR(purple)to makethempurplish.
Ill
TheAPERTURE,CHROMA,PHASEcontrolsettingshaveno
effect onthepicturesof analogRGBor digital RGBsignals.
[l]CONTRASTbuttons
Press+ to makethecontrast,color Intensityand
brightnessstrongeror- to makethem weaker.
!I]VOL (volume)buttons
Press+for morevolumeor - for less.
U]POWERswitchandIndicator
Depressto turn themonitoron.
TheIndicatorwilllight up in green.
Presstheswitchagainto tum the monitoroff.
Ill]H-VDELAYbutton
Depressto observethe horizontalandvertical sync
signalsat thesametime.
Thehorizontalsyncsignal Isdisplayed Inthe left quarter
of thescreen;theverticalsignalls displayednearthe
centerof thescreen.
illJUNDERSCANbutton
Depressforunderscannlng.ThedisplaysizeIsreducedby
approximately3% so that lour cornersof the rasterare
visible.
Ill)BLUEONLYbutton
Depressto turnoff the redandgreensignals.Ablue
signal Isdisplayedas anapparentmonochromepicture
on the screen.Thisfacilitates "chroma" and "phase•"
controladjustmentsand observationof VCRnoise.
• "Phase" controladjustmentls effectiveonlyforthe NTSCsignals.
Ill!ColorsystemIndicators
Theindicatorof the color systembeing receivedlights up
Inred.
(llJINPUTselectbuttons
Pressto selectthe programto be monitored.
A:forasignal fed throughthe LINEA connectors.
B:forasignal fedthroughthe LINEBconnectors.
Y/CNTR:for asignaifedthroughtheY/C-INPUT
connectors or VTRconnector.
Whenboth the Y/C-INPUTand VTRconnectorsare
connectedto videoequipment,the Inputsignal led
throughtheY/C-INPLJTconnectorhas priorityoverthe
one fed throughthe VTRconnector.
RGB:for a signal fedthrough theANALOGRGB
connectorsor DIGITAL RGBconnector;
lll!ANALOG/DIGITAL(EXTSYNC)button
This button functions asANALOG/DIGITAL selectorand
EXTSYNCselector.
AsANALOG/DIGITALselector
Depressto monitora signalled through the ANALOG
RGBconnectors.
Releaseto monitor asignalfedthrough theDIGITALRGB
connector.
ForEXTSYNCselector
Depresslo operatethe monitoronanexternalsyncsignal
fedthroughtheEXTSYNCconnectoron therearpanel
(EXl).
Releaseto operatethe monitoron the syncsignalfrom
thedisplayedcompositeVideosignal(INn.

I
-.J
I
PICTURE ADJUSTMENT Buttons
The picture adjusbnent buttons of each monitor operate in the following input mode (indicator as "Yes")
Model InputMode APERTURE
• LINEA, LINEB
PVM-1343MD/ -vie Yes
PVM-1342Q/ • Analog RGB
PVM-1341 • Digital RGB
• Analog RGB No
jRearpanel I
BRIGlfT
Yes
Yes
CHROMA PHASE
Yes
Yes (NTSConly)
No No
LINEA,LINEBconnectors
Y/C-INPUTconnectors
I ;± [I] VTRInputconnectors
I===d!§l:::Lr-~~~I II] COLORTEMPselector
III
1···· m
l=: V HOLDcontrol
CTRLSconnectors
DIGITALRGBconnector
HCENTcontrol
~---------rn] EXTSYNCconnectors
~----------------IIlJ ANALOGRGBconnectors
CONTRAST
Yes
Yes
VOL
Yes
No
IJ]LINE A,LINE B connectors
Two groups(Aand B)of line input connectors for the
compositevideoand audio signals and their loop-through
output connectors.
To monitor the inputsignal led through theseconnectors,
pressthe A or B input selectbutton on the front panel.
VIDEOIN (BNCtype):Connectto thevideooutput of a
video equipment, such as a VCR or a color video
camera.For a loop-throughconnection,connect to the
videooutput of anothermonitor.
VIDEOOUT(BNCtype):Loop-throughoutput of the
VIDEOIN connector.Connect to the videoinput for a
VCR oranother monitor.
When thecable is connectedto this connector, the
75-0hmstermination of the input is automatically
released,andthesignal input to the VIDEOIN
connector is output from this connector.
AUDIOIN (phonojack):Connectto the audio output of a
VCRor to a microphonevia a suitable microphone
amplifier. Fora loop-throughconnection, connect to
the audiooutput of another monitor.
AUDIOOUT(phonojack):Loop-throughoutput of the
AUDIOINjack. Connectto the audio input of a VCRor
anothermonitor.
[I]Y/CINPUT connectors(4pin DIN)
VIDEO:Connectto the Y/Cseparateoutput of avideo
cameraor a VCR.
AUDIO:Connectto the audiooutput of a videocameraor
aVCR.
To monitor the Input signal fedthrough these connectors,
pressthe Y/CNTRbutton on the front panel.
[I]VTR inputconnectors(8-pin)
Lineinput for the videoand audio signals.When
connectedto the 8-pinTV connector of a VCR,the video
and audioplayback signal from the VCRcan be
connectedwith a single cable.
To monitor the input signal led through this connector,
pressthe Y/CNTRbutton on the front panel,with the
Y/C-INPUTconnectorsconnectedto nooutputs.
When bothVTRandY/C-INPUTconnectors areconnected
to videoequipment,the input signal fed throughthe
Y/CINPUT connectors has priority over the bne fdd
throughtheVTRconnectors.
IJ]COLORTEMP(temperature)selector
Selectthe color temperatureposition, 9300°Kor6500°1<.
II)VHOLD(verticalhold)control
Turnto stabilize the picture if IIrollsv~rtlcally.
G
II]CTRLS (controlS)connectors(minijack)
Forremotecontrol of theAPERTURE,BRIGHT,
CHROMA,PHASE,CONTRASTandVOLcontrol buttons.
IN: Connectto the "control S" output of other equipment.
OUT:Connect to the CTRLS IN connector of another
monitor by using aconnecting cord (miniplug-
miniplug).
@DIGITAL RGBconnector(9-pin)
Connectwith a microcomputer havinga digital (TTLlevel)
RGBvideooutput.
Tomonitor the input signal fed through this connector,
pressthe RGBbutton and keepthe ANALOG/DIGITAL
(EXTSYNC)button released.
-
Forconnection,be sure to usean optional SMF-520
connecting cable.
!Ii]H CENT (horizontalcentering)control
When adigital R/G/Bsignal is monitored, turn to center
the picture if It Is decentered.
[i.21EXTSYNC(externalsync)connectors(BNCtype)
IN: Connect to the output of a sync generator.
Tomonitor the sync signal fed through this connector,
depresstheANALOG/DIGtTAL(EXTSYNC)button.
OUT:Loop-throughoutput of the SYNCINconnector.
Connect to theSYNCinput of a videocamera.
Whenthe cable Is connected to this connector, the
75-0hmstermination of the input is released,and the
signal input to the IN connector is output from this
connector.
IIlJANALOGRGBconnectors(BNCtype)
R/G/8 IN: Connectto the analog R/G/8outputs of a
videocamera.
Tomonitor a signal fed through these connectors,press
the RGBbutton and depresstheANALOG/DIGITAL (EXT
SYNC)button.
R/G/BOUT:Loop-throughoutputs of the R/G/8IN
connectors.Connectto the analog R/G/8inputs of a
videocamera.
Whenthe cable is connected to these connectors,the
75-0hmstermination of the input is released,andthe
signal input to the R/G/8OUTconnector is output from
theseconnectors.

>VM-1341 /13420/1343MD
MEMO
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-8-

.,
SECTION 2
DISASSEMBLY
2-1. REAR COVER AND TOP COVER REMOVAL
©two screws
2- 2. TERMINAL BOARD REMOVAL
Note : When you remove terminal board, pull out A board a short distance.
PVM-1341 /13420/1343MD
Ci)six nylon livets
Ci)Remove the terminal board as arrow @
while push the two claws as arrow ®·
-9-

>VM-1341/13420/1343MD
2-3. BRACKET OF TERMINAL BOARD REMOVAL
(DRemove the bracket of terminal board as arrow @
while extend two claws as arrow @.
2-4. CONTROL UNIT REMOVAL
cmQ®·two screws
-10-
<DPull out the cabinet of
bottom as arrow @.

2-5. PICTURE TUBE REMOVAL
NOTE : Caution for ANODE CAP installation.
When you replace PICTURE TUBE or FBT, remove RTV
on ANODE CAP so that PICTURE TUBE and FBT can
be separated. Please adhere picture tube and anode
cap in accordance with the following procedure.
ADHERING PROCEDURE OF ANODE CAP.
1.. Clean PICTURE TUBE ANODE CAP with ethnaol
to remove original RTV.
2. Dry clean face with air.
@two screws
@picture tube
cushion
ANODE CAP REMOVAL
• Removing Procedures
(D Turn up one side of the rubber cap in the direction
indicated by the arrow@.
Anode button
-11-
PVM-1341 /1342Q/1343MD
3. Use KE-490RTV (RTV silicone adhesive, SHIN-ETSU
CHEMICAL).
Part. No.
7-322-065-19
4. Install ANODE CAP.
Description
Silicone (RTV) KE-490W
5. Adeguately apply RTV to the entire picture tube
anode area, piace the anode cap onto the picture
tube and push it down securety so that no air
pockets remain beneath the cap.
6. Dry more than 12 hours at room temperature.
G)four screws
(Remove cabinet of bottom.)
0 Using a thumb, pull up the rubber cap firmly in the
direction indicated by the arrow@.
@ When o~e 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@. ·

>VM-1341/13420/1343MD
SECTION 3
SET-UP ADJUSTMENTS
• The following adjustments should be made when
a complete realignment is required or a new picture
tube is installed.
• These adjustments should be performed with rated
power supply voltage unless ontherwise noted.
The control and switch below shoul~ be set as follows
unless otherwise noted :
CONTRAST control ········· 80%
BRIGHTNESS control ······· 50%
Precaution
• Set the side of the unit with the PICTURE TUBE
so that it faces east or west in· oder to reduce
the influence of external magnetic force.
• Turn the power switch for the unit ON and erase
the magnetic force using a degausser.
[3-1 . BEAM LANDING[
1. Receive an entirely white signal with the pattern
generator.
CONTRAST ········· MAX.
BRIGHTNESS ······· set easy to observe
2. Adjust the focus and the horizontal convengence
roughly.
3. Loosen the deflection yoke mounting screw, and
set the purity control to the center as shown in
Fig. 3-1.
4. Switch over the pattern generator to green.
5. Move the deflection yoke backward, and adjust
with the purity control so that green is in the
center and blue and red are at the sides, evenly.
(Fig. 3-2)
6. Move the deflection yoke forward, and adjust so
that the entire screen becomes green. Repeat 5
to 7 as to red and blue.
7. When landing at the corners is not right, correct
by using the magnet. (Fig. 3- 3)
8. When the position of the deflection yoke is
determined, tighten it with a deflection yoke
mounting screw.
@
-12-
Perform the adjustments in order as follows :
3-1. Beam Landing
3 - 2. Convergence
3-3. Focus
3-4. White Balance
Note: Test Equipment Required.
1. Color Bar/Pattern Generator
2. Degausser
3. Color Annalyzer (Minolta)
4. Luminance Level Meter
5. Oscilloscope
purity control
Fig. 3-1
Fig. 3-2
control corrects
Fig. 3-3
Disk magnets or
rotable disk
magnets correct
these area (a-d).

3-2. CONVERGENCE
(1) HorizontalandverticalStaticConvergenceAdjustment
ontheCenterofScreen.
Before starting, perform Y. SIZE, Y. CENT, H.SlZE, H.CENT
and Screen Distortion Adjustment rightly.
(StaticConvergenceAdjustment)
I. Receive a dot signal, setting BRIGHTNESS minimum and set
CONTRAST to normal.
2. Adjust H.STAT YR to coincide red, green and blue dots on the
center of screen. (Horizontal movement)
3. Adjust Y.STAT magnettocoincide red,green and blue dots onthe
center of screen. (Vertical movement)
*
center dot G-t-----,
cent~edot A
~ s
A G B V.STATMagnet
H.STAT RV701
If the red, green and blue dots do not coincide on the center of
screen with H.STAT YR, perform adjustment using Y.STAT at
the same time while tracking.
(Tilt the Y.STATmagnet and adjust static convergence to open or
close the Y.STAT magnet.)
(OPEN)
/.,..
.,.
4. When the Y.STAT magnet is moved in the direction of arrow A
and b, red, green and blue dots move as shown below.
G) When moving the Y.STAT Magnet open or close .
_1:1:__:h_
Ar,.- At,
I -..._
® When moving the Y.STAT magnet counterclockwise.
I
R G B
o Io
--
@ When moving the Y.STAT magnet clockwise.
I
B G R
~r-0
© When tilt the Y.STAT magnet and open or close.
*
~ R~rE)B~r
~~~
If the red and green dotsdo not coincide with blue dot, adjustment
with BMC (6-poles) magnet.
5. HMC and YMC correction for BMC (6-Poles) magnet.
G) HMC (Horizontal Misconvergence) correction andmotionof the
Electron Beam with the BMC (6-poles) magnet.
HMC Correction
A<B R G B
00 0
i-4---J
A.. B
R GB
0 0 0
~
A B
HMCCorrection
A>B R GB
0 00
L-LJ
A+B
R GB
A=B O O O
U-l
A B

_I
® VMC (Vertical Misconvergence) correction and motion of the
Electron Beam with the BMC (6-poles) magnet.
VM*)~B)
C<D C=D C>D C=D
CijRCEOA
O • OG
D G D
B OB cri~cc~
otge°Ce
puritymagnet
BMC(6-poles)magnet
V.STAT.
(2) Horizontal and Vertical Dynamic Convergence
Adjustment at the Environs of the Screen (Dynamic
ConvergenceAdjustment)
I. When there ismisconvergence atthe sidesof screen, adjustfor best
convergence as follows by moving the deflection yoke.
0-0-0
RGB 0--0-01--------- B GR
2. Loosen deflection yoke screw. Remove deflection yoke spacers.
Move the deflection yoke for best convergence. Tighten the
deflection yoke screw. Install three deflection yoke spacers.
-.---------; 0-0-0
BGR C,.-0.0
A GB

Screen-corner Convergence
b
C
a-d:screen-corner
misconverence
a
d
@ Affixa permalloyass'y
I
'®
3-3. FOCUS
I. Receive the broadcast.
I correspondingtothe
misconvergedareas.
/ (Therearsideofpicturetube)
2. CONTRAST - Norma'!
3. Adjust FOCUS control so that the focus on the center of screen
becomes to the best.
FBT
3-4. WHITE BALANCE
[Screen(G2)VoltageAdjustment]
FOCUS
I. Receive a dot signal with the pattern generator.
2. Adjust R.G. B cut-off controls so that respective cathode voltage
against ground becomes I03V DC.
3. Observing the screen, adjust SCREEN control so that the back-
ground of the dot signal is bright dimly.
FBT
SCREEN
[WhiteBalance]
1. Receive a color-bar pattern signal with the pattern generator.
(Make black and white screen by chroma switch off.)
2. • BRIGHTNESS ............ 50%
• CONTRAST ............... Minimum
• CHROMA ................... 50%
• DRIVE control ............ Mechanical center
• BKG control.. ............. Mechanical center
3. Adjust RV! 18 (SUB BRT) on B board so that the blue stripe
portion on the color-bar pattern signal is bright dimly.
color-barpattern BL
W Y C G M R B
4. Receive an entirely white signal from the pattern generator.
5. CONTRAST .................... 70% (90 degree clockwise from
mechanical center.)
6. Using the luminance levelmeter, adjust theluminance levelof the
pattern generator becomes 3 Nits. (The condition the screen is
bright dimly.)
7. Adjust white balanceatcut-offusingRVl 19(G-C/O) andRV121
(B-C/0).
8. Change the all-white signal luminance level to 100 IREs.
9. Adjust white balance at high-light using RV120 (G-GAIN) and
RV121 (B-GAIN).
JO. Change the unit to blue ONLY mode.
11. Adjust white balance (at high-light) in blue ONLY mode using
RV124 *R-GAIN/BL) and RV125 (G-GAIN/BL) .
12. Using the luminance level meter,adjust the luminance level of the
pattern generator becomes 8 Nits. Confirm that white balance at
cut-off is satisfactory..

/3-4. WHITE BALANCE/
(Screen (G2) Voltage)
1. Receive a dot signal with the pattern .generator.
2. Switch over COLOR TEMP to 6500° K.
3. Using oscilloscope, adjust with RV1710 (SUB BRT)
on V board so that the green cathode voltage
against ground becomes 160 V DC..
4. Similarly, adjust with RV1704 ( B 8KG) and
RV1705 (R BKG) on V board so that the blue
and red cathode voltages become 160 V DC. ·
pedestal
160 V DC
---------'--------ov
5. Observing the screen, adjust with RV709 (SCREEN)
on C board so that the back-ground of the dot
signal is bright dimly.
(White Balance)
1. Receive a color-bar pattern signal with the pattern
generator, and to ma~e black and white screen
by chroma switch off.
2. • BRIGHTNESS ............ 50%
• CONTRAST ............... Minimum
• CHROMA .................. 50%
• DRIVE volume
(V BOARD) .............. mechanical center
• BKG volume
(V BOARD) .............. mechanical center
3. Adjust RV1710 (SUB BRIGHT) so that the blue
stripe portion on the color-bar pattern signal is
bright dimly.
color-bar pattern
W Y C G M R B
4. Receive an entirely white signal from the pattern
generator.
5. CONTRAST .................. 70%
6. Using the luminance level meter, adjust the
luminance level of the pattern generator becomes
8 Nit. (The condition the screen is bright dimly.)
-15-
PVM-1341/13420/1343MD
7. Adjust with the color analyzer the white balance.
8. Reset the luminance level of the pattern generator,
and adjust the white balance. (High light con-
dition.)

PVM-1341 /13420/1343MD
MEMO
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-16-

PVM-1341/13420/1343MD
SECTION4
SAFETYRELATEDADJUSTMENTS
IB+ MAX CONFIRMATION (HR690) I
The following adjustments should always be performed
when replacing the following components (marked with
[;jj on the schematic diagram).
Ciiii1on F board : IC601, 1~602, IC651, D654, D655,
C658, C659, R634, R652, R653,
R654, R655, R656, R657, R665,
R671, R6130,RV601
1. Supply 130 ::g-
0v AC to with variable auto-trans-
former.
2. Receive a dot signal.
3. • CONTRAST ·•·········· Minimum
• BRIGHTNESS .,......• Minimum
4. Connect a digital multimeter to TP91.
5. Confirm the voltage of TP91 is less than 118.2
V DC when. rotate RV601 oh F board fully
clockwise.
6. If step 5 is not satisfied, readjustment should be
performed by altering the resistance value of R690
(B).
7. Receive a dot signal.
8. Disconnect A-22 connector (ABL JIG) on A board
and connect an ammeter.
9. Adjust BRIGHTNESS and CONTRAST so that the
current to 70 ±30 µA.
1O. Adjust RV601 on F board so that voltage of TP91
is 115.5 ±0.3 V DC.
11. Supply 90 ±5.0 V AC to with variable auto-
transformer.
12. Receive entire white sjgnal.
13. • CONTRAST ············ Maximum
• BRIGHTNESS ·•······· Maximum
14. Confirm the voltage of TP91 is more than 113.0
V DC.
-17-
CONFIRMATION WHEN REPLACING H.V.R
(High Voltage Resistor)
The following adjustment should be confirm the output
voltage when replacing HVR.
1. Receive an entire white signal.
2. • CONTRAST ············ Maximum
• BRIGHTNESS ········· Maximum
3. Connect a digital multimeter to the A-20 connector
side lead of R804:•
4. Confirm the voltage is 14.1 ± 1.0 V DC.
H R500, CONFIRMATION METHOD (HOLD-DOWN
CONFIRMATION) AND READJUSTMENTS
The following adjustrl}ents. should always be performed
when replacing the following ,components (marked with
~ on the schematic diagra0m).
~ on A board : IC501, 0503, 0504, 0505, 0506,
D509, D510, C505, C520, C524,
C525, C526, C527, C528, C529,
C530, C531, R500, R506. R516,
R517, R518, R519, R520, R521.
R522, R523, R524, R525, R526,
R528, R804, NL501, HVR
1. Receive an entire white signal.
2. • CONTRAST ············ Maximum
• BRIGHTNESS ········· Maximum
3. Connect a digital multimeter to the A-20 connector
side lead of R804.
4. Confirm the voltage is 14.1 ± 1.0 V DC.
5. Receive a dot signal.
6. Disconnect A-22 connector (ABL JIG) on A board
and connect an ammeter.
7. Adjust BRIGHTNESSand CONTRAST so that the
current to 70 ± 30 µ A.
8. Apply an external DC voltage gradually to the A-
20 connector side lead of R804, and when the
voltage becomes 16.4 ±0.1 V DC, confirm the
HOLD-DOWN circuit operates immediately and
raster disappears.
9. With the same procedure of item 8, when the
voltage becomes 15.8 ±0.1 V DC, confirm the
HOLD-DOWN circuit doesn't operate.
10. Receive an entire white signal.
11. Adjust with BRIGHTNESSand CONTRAST volumes
so that the current to 600 ±40 µ A.
12. Apply DC voltage to the A-20 c9nnector side lead
of R804, and when the voltage becomes 15.8 ± 0.1
V DC, confirm .the HOLD-DOWN circuit operates
immediately and raster disappears.
13. With the same procedure of item 8, when the
voltage becomes 15.2 ±0.1 V DC, confirm the
HOLD-DOWN circuit doesn't operate.
14. When step 4 to 13 is not satisfied, readjustment
should be performed by altering the resistance
value of R500 CH).

:>VM-1341 /1 342 0/1343MD
digital multimeter
~
ammeter digital multimeter
B
~
i
-18-

SECTION 5
CIRCUIT ADJUSTMENTS
5-1. A BOARD ADJUSTMENTS
-A BOARD (COMPONENT SIDE) -
TP41 RV003
TP42e~ IB-Y DEM LEVELJ
~tEB
Ic311 / O CJJ1
16
8~ RV004
E 0333
§B§E RV006
!MATRIX B-YJ RV502
IH, CENTI
$
IR-Y DEM LEVELI
1 ' +C313 IC301
IC302
~13
~~1
RV002
IACCI
RV005
$
1024
12 13
A-15
r
0330 B
HORIZONTAL OSCILLATION FREQUENCY
ADJUSTMENT (RV501)
1. Receive a monoscope signal.
$ $
RV007
!MATRIX R-Yj
IC503
VR1
1~
VR2
9
2. Connect pin (j) of IC501 to ground with 100 µ F/
16 V electrolytic capacitor.
3. Adjust RV501 so that the screen streaming stops.
fo: low fo: suitable fo: high
H-V BLK ADJUSTMENTS (RV510, RV512, RV513,
RV514)
1. Receive a monoscope signal.
2. Set U/S (Under Scan) switch to Under mode.
3. • CONTRAST ...... ... Minimum
• BRIGHTNESS ...... Maximum
4. Adjust RV510 (U. H. SIZE) so that the white frame
of monoscope signal becomes visible.
5. Adjust RV512 (Video Phase) so that the white
frame of monoscope signal becomes to the right
side just on the screen.
RV512 RV550 RV504 RV511
!VIDEO PHASEIJv. ANGj JPIN PHASE! 1u.v. SIZE!
6. V. BLK Adjustment (RV514)
white frame
White frame becomes
just to the right side.
(1) Adjust RV514 (V. BLK) so that the upper side
white frame of monoscope signal is not blanked
V.BLK Make not to blank th1
upper sicie white frami
of monoscope signal.