Iiyama Vision Master Pro411 User manual

SERVICE MANUAL
June27,2000
710-1Kitaowaribe,Nagano-shi381-0014JAPAN
IIYAMA CORPORATION
Copyright
NO. S1700E01
i70A
A705MT
S705MT

[ Revision Record ]
Rev. Section Contents

2. TIMING CHART..............................................................................................
3. IC APPLICATION...........................................................................................
1.SET-UP ADJUSTMENTS...............................................................................
SAFETY PRECAUTION.............................................................................
5. SERVICE PARTS LIST...................................................................................
6. EXPLODED VIEW.........................................................................................
4.CIRCUIT DESCRIPTION.................................................................................
7. DIAGRAMS...................................................................................................
CONTENTS
Page
41-46
47-50
1-12
13
14-15
16-24
25-40
i-ii
NOTICE
The information in this document is subject to change without notice.

SAFETY PRECAUTION
1. Thedesignofthisproductcontainsspecialhardware,manycircuitsandcomponentsspeciallyforsafetypurposes.
Forcontinuedprotection, no changesshouldbe made totheoriginal design unlessauthorizedin writing bythe
manufacturer. Replacement parts must be identical to those used in the original circuits. Service should be
performedbyqualifiedpersonnelonly.
i
Alterationsofthe design or circuitryofthe productsshouldnotbe made.Any designalterationsor additions will
voidthemanufacturer's warranty and will furtherrelievethe manufacturer of responsibilityforpersonalinjury or
propertydamageresultingtherefrom.
2.
3. Many electrical and mechanical parts in the products have special safety-related characteristics. These
characteristicsareoften not evidentfromvisual inspection nor cantheprotection afforded bythemnecessarily
beobtainedbyusingreplacementcomponentsrated for higher voltage, wattage, etc.Replacementpartswhich
havethesespecialsafetycharacteristicsareidentifiedinthe parts list of Service manual. Electrical components
havingsuchfeatures are identified bymark“ ! ”ontheschematics and !onthe parts list inServicemanual. The
use of a substitute replacement which does not have the same safety characteristics as the recommended
replacement part shown in the parts list of Service manual may create shock, fire, or other hazards.
Useisolationtransformer.
The chassis and any sub-chassis contained in some products are connected to the primary circuit of theAC
power line.An isolation transformer of adequate capacity should be inserted between the product and theAC
power supply point while performing any service on some products when the primary circuit of theAC power
supply is exposed.
4.
Thehighvoltageappliedtothe picture tube must conform withthatspecifiedinServicemanual.Excessive high
voltageconditionsshouldbekepttoaminimum,orshouldbeprevented.Ifseverearcingoccurs,removetheAC
powerimmediatelyand determine the causebyvisualinspection (incorrect installation, crackedormelted high
voltageharness,poorsoldering,etc.)Tomaintaintheproperminimumlevelofsoft X-rayemission,components
inthehigh voltage circuitryincludingthe picture tube mustbe the exact replacementsoralternatives approved
bythe manufacturer ofthe complete product.
5.
Isolation Check
(Safetyfor Electrical ShockHazard)
After reassembling the product always perform an isolation check on the exposed metal parts of the cabinet
(videoinputandoutput terminals, control knobs,screwheads,controlshafts,etc.) to be suretheproductissafe
tooperate without dangerof electrical shock.
6.
Dielectric Strength Test
Theisolation between theAC primary circuitand all metalpartsexposedto the user, particularly any exposed
metal part having a return path to the chassis should withstand a voltage of 1,500VAC(r.m.s.), 20mA(current
sensitivity)for a periodof one minute.
Thismethod of test requires atest equipment not generally found in theservice trade.
(1)
Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.).
Using a “Leakage Current Tester”, measure the leakage current from each exposed metal part of the cabinet,
particularly any exposed metal part having a return path to the chassis, to a known good earth ground (water
pipe etc.).Any leakage current must not exceed 3.5mAAC(r.m.s.).
(2)

GOODEARTHGROUND PLACE THIS PROBE ON
EACH EXPOSED METAL
PART
ACVOLTMETER
(HAVING 1,0009/VORMORE SENSITIVITY)
Alternate Check Method
PlugtheACline cord directlyinto theAC outlet(do not usea line isolationtransformer during thischeck.). Use an
ACvoltmeterhaving1,000ohmsper volt or moresensitivityinthefollowingmanner.Connecta1,500910Wresistor
paralleled by a 0.15uFAC-type capacitor between an exposed metal part and a known good earth ground (water
pipe etc.).
MeasuretheAC voltageacrossthe resistorwith theACvoltmeter.Move the resistor connection toeach exposed
metal part, particularly any exposed metal part having a return path to the chassis, and measure theAC voltage
acrossthe resistor. Now, reverse the plug intheAC outletand repeat each measurement.Any voltagemeasured
must not exceed 2.45VAC(r.m.s.). This corresponds to 3.5mAAC(r.m.s.).
0.15uFAC-TYPE
1,500910W
ii

1. SET-UP ADJUSTMENTS
The following adjustments should be made when a complete realignment is required or a new picture tube is
installed.
<Requiredmeasuringequipment>
<Preparation>
Signalgenerator (Programmable video generator)........................ Leader1604A
DCvoltmeter(300VDCrange)
Note: Digital multimeter can also be used.
Highvoltageprobe(0-30kVDC)
Color analyzer.......................................................................... MinoltaCA-100
Photometer............................................................................. MinoltaLS-100
Electric field meter.................................................................... CombinovaEFM100
Scale (Two 50cm scales put together so that no visual aberration occurs.)
Frequencycounter
Digitalwattagemeter
Degausser
Interfaceadapter(Iiyamahandmade)
Short-connector(Iiyamahandmade)
Place the monitor without tilting.
Connectthe signal cable from thesignal generator to the monitor.
Face the CRT screen to east so as not to be influenced by magnetic force.
Turn ONthe Power Switch,and degauss the entire screenwith degausser.
Perform adjustment by setting the brightness to center and the contrast to maximum, except where
specificallyindicated.
Receive MODE 5 and turn ON the Power Switch. Perform adjustment after a warm-up of at least an
hour.
Adjustment data is automatically saved in the memory when the on screen display disappears or
anothersignalisreceived.
1.
2.
3.
4.
5.
6.
7.
- 1 -
Note: Thismonitorshould be checkedandadjusted by connecting ittoa signal generator,thenentering
andrunning the timingcharts both belowand of Chapter2.
R
15.439
15.526
15.994
15.545
Q
0.771
0.567
0.587
0.571
O
16.652
16.661
16.663
16.196
D
27.94
30.05
8.66
8.38
S
0.368
0.501
0.035
0.034
P
0.074
0.067
0.047
0.046
E
2.20
0.45
0.49
0.51
Vertical(msec)
Horizontal(µsec)
C
2.21
0.39
1.41
1.38
B
4.41
2.50
1.20
1.16
A
36.76
33.39
11.76
11.43
V
N
N
P
N
Sync polarity
H
N
N
N
N
Resolution*
608×420
640×480
368×1360
544×1360
Comp
–
–
–
–
Sync
on
green
–
–
–
–
fH
(kHz)
27.3
30.0
85.0
87.5
*Theresolutionsareonly for your referencewhenusingLeader 1604A.

ADJUSTMENT MODE
Thereare two differentmodes availableto adjust themonitor as describedbelow.Theadjustment with ‘o’in front
ofthetitle are only availableunderUserMode. The adjustments with‘n’infrontofthe title are onlyavailableunder
Factory Mode. You can perform the other adjustments by either User or Factory Mode. Please change the mode
asrequired.
USER MODE:
Turn ON the Power Switch and you are in the User Mode.
FACTORY MODE: There are two ways to enter the Factory Mode.
1. Turn OFF the Power Switch. Short between pins 2 and 4 of P803 connector on the PWB-MAIN with
a short-connector. Turn ON the Power Switch and you are in the Factory Mode. The following Factory
Mode Menu appears on the screen when you press the MENU Button. Turn OFF the Power Switch and
remove the short-connector from P803 connector toexit.
2. In the adjustment menu, select "Function" on the Main Menu and then select "Language" on the Sub-Menu.
Follow the flow chart below and you are in the Factory Mode. Turn OFF the Power Switch to exit.
The menu items in the Factory Mode are as follows:
Pincushion
Trapezoid
Parallelogram
Pinbalance
Side pin Top
SidepinBottom
Contrast
Brightness
V-size
V-position
H-size
H-position
PinbalanceTop
PinbalanceBtm
Cutoff red
H-size bias
Cutoff blue
DBFPara
- 2 -
*DATEST 3 helps you to perform H/V-BLANKING and H-CONVERGENCE / TILT-DYconfirmations in
this SET-UP ADJUSTMENTS.Thefollowing items aredisplayedautomatically in turn.
1.H-convergence è2. Tilt-dy è3. H/V-blanking
P803
connector
CRT
ê
CRT face
PWB-MAIN

RC
HD
BC
DP DH VD
V
S
V
CRG
CT
BG
T1 T2 T3
F
f
DBFPhase
V DBF
Hmoire
V moire
H convergence
Tilt-Dy
P803
short
V linear side
V linear corner
Redgain
Temp cont
Blue gain
Degauss
DATEST1
DATEST2
DATEST3 *

1-3. FH-LIMITER confirmation
1)
2)
3)
4)
5)
6)
7)
Receiveacross-hatch inverted signal offH27.3kHz.
Confirm that the picture disappears. Also, make sure the horizontal
oscillationfrequency is withinthe specified range:59-61kHz.
ReceivefH 30.0kHz andconfirm that the picture issynchronized.
ReceivefH 87.5kHzand confirmthat the picture disappears.Also,make
surethehorizontaloscillationfrequencyiswithin thespecifiedrangeabove.
ReceivefH 85.0kHz andconfirm that the picture issynchronized.
Turn OFF the power of signal generator and confirm that the picture
disappears.Also makesure thehorizontal oscillationfrequency iswithin
thespecifiedrangeabove.
Removethefrequencycounter.
n
- 3 -
Note: SCREENVR should not beturned after theadjustment above.
1-1.ANODE VOLTAGE adjustment [PWB-MAIN]
1-2. SCREEN VOLTAGE adjustment [PWB-MAIN]
1)
2)
3)
4)
Receiveacross-hatch inverted signalofMODE 5.
TurnON the Power Switch.
Connect a high-voltage probe between the SC connector on the PWB-
VIDEOand GND (chassis).
Adjustthe screen voltageto630±10V with SCREENVR located lowerof
T501(FBT).
1)
2)
3)
4)
5)
6)
7)
Receiveacross-hatch inverted signalofMODE 5.
TurnOFF the PowerSwitch.
Connectahigh-voltageprobebetweenCRTanodeandGND (chassis).
TurnON the Power Switch.
Adjustthehigh-voltageto25.0±0.1kVwith VR503 (HV-ADJ).
Confirmthevariationofhigh-voltageiswithin±0.2kVwhenreceiving MODE
2and MODE 6respectively.
TurnOFFthePowerSwitchand remove the high-voltage probe.
WARNING!
VR501(HV-ADJ)hasbeencarefullyfactory-adjustedforeachunitinorder
tosatisfyregulationsregarding X-radiation.
Furtheradjustmenton VR501 shallnotbe performed.
In case of adjustment, the adjusted position of VR501 must be fixed by a
solderingironto prevent itfromrotating.
Voltage
S
C
R
E
E
N
T501(FBT)
Voltage
VR503 HV-ADJ

1-6. V-LIN adjustment
1)
2)
3)
4)
Receiveacross-hatch inverted signalofMODE 5.
Adjust the vertical size to 232.5±10mm.
Adjusttheverticallinearcorner(Vlinearcorner),sothatdifferencebetween
Aand B of the right hand side figure is as follows: |A–B | </= 0.5mm
Adjusttheverticallinear side (V linear side),sothatA,BandCarealmost
equal.
A
C
B
1-5. V-BLANKING confirmation
Picture Picture
Raster rolling Raster tearing
1)
2)
3)
4)
5)
Receivea cross-hatch invertedsignal of MODE5 or MODE6.
Adjustthe vertical sizeand position (V-size and V-position)of the picture
roughlywith the frontbuttons.
Select DA TEST 3 and press the MENU Button so that the automatic
confirmationprogramstarts.
Confirm that the back-raster is not rolling or tearing at the top.
Confirmthat no retraceline is over the picture.
1-7. H-CENT adjustment [PWB-MAIN]
1)
2)
3)
4)
5)
Receiveacross-hatch inverted signalofMODE 6.
Adjustthehorizontalsizeand position of the pictureroughlywiththefront
buttons.
Maximize the brightness so that the back-raster appears on the screen.
Set S501 to the right, center or left so that A and B in the right hand side
figurearealmost equal.
Returnthe brightness tocenter indication (adjustment range:128).
- 4 -
1-8. TILT-DY adjustment
1)
2)
Receiveacross-hatch inverted signalofMODE 5.
Adjustthetilt deflection yoke (Tilt-Dy) withthe+/– Buttons so thatXofthe
right hand side figure is as follows: | X | </= 0.5mm.
X
n
n
n
n
Picture
Bezel
AB
Back-raster
Right Left
S501
1-4. H-BLANKING confirmation
1)
2)
3)
4)
5)
Receivea cross-hatch invertedsignal of MODE5 or MODE6.
Minimize the horizontal size with the front buttons.
Select DA TEST 3 and press the MENU Button so that the automatic
confirmationprogramstarts.
Confirm that X of the right hand side figure is as follows: X </= 3.0mm.
Adjust the horizontal size roughly with the front buttons.
n
Picture
Raster rolling
x

- 5 -
1-9. PICTURE SIZE, POSITION AND DISTORTION adjustment (Criteria)
1)
2)
3)
Receiveacross-hatch inverted signalofMODE 5.
Adjust the picture size and position to the specified setting below.
Correctthesidedistortionwith the front buttons sothatXofthe right hand
side figure is as follows: | X | </= 3.0mm.
H-size:310±4mm
V-size:232.5±4mm H-position: |A–B |<4mm V-position:| C–D |<4mm
1-10. PICTURE SIZE, POSITION AND DISTORTION adjustment
1)
2)
3)
Receiveacross-hatch inverted signalofall preset modesrespectively.
Adjust the picture size and position roughly with the front buttons to the
referencesettingsbelow.
Correctthe Pincushion and Trapezoiddistortion with thefront buttons so
that X of the right hand side figure is as follows: | X | </= 3.0 mm.
Bezel
AB
C
D
Picture
Pincushion
Trapezoid
Pinbalance
Parallelogram
Side pin Top / Bottom
Pinbalance Top / Bottom
Notes:1. No other adjustment items for distortion than the above should
be adjusted.
2. Thepicture shouldbe within the bezel.
1-11. RESET confirmation
1)
2)
3)
4)
Receiveacross-hatch inverted signalofMODE 5.
Changethehorizontalposition(H-Position)roughlywiththefrontbuttons.
PerformReset.
Confirm that the adjustment data above is reset to the factory setting.
n
n
H-size:310±10mm
V-size:232.5±10mm H-position: |A–B |<8mm V-position:| C–D |<8mm
o
Pincushion
Trapezoid
Parallelogram
Side pin Top / Bottom
Pinbalance
Side pin Top / Bottom
XX
XX
Pinbalance Top / Bottom

1
0
B. P. S. DIP switch
1-12.Automatic COLOR adjustments
WARNING:
- 6 -
Donotchange the horizontal andverticalsyncsignal or the frequency
whiletheautomatic COLOR adjustmentsareunderway.
Color analyzer setting:
Luminance unit switch: cd/m2
B.P.S. DIP switch: 9600 (1000)
TurnON thecolor analyzerswitch andpress 0-CALswitch beforeuse.
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
Be sure to enter the Factory Mode by using the short-connector.
Connectthe interfaceadapter fromRS-232C ofthe color analyzer to the
short-connector.
Receivea whitewindow signal of MODE 5.
Turn OFF the R, G and B outputs on the signal generator.
Apply a color analyzer probe to the center of the screen.
Turn ON the Remote Switch of the color analyzer so that the automatic
CUT-OFFadjustmentstarts.
Turn ON the R, G and B outputs on the signal generator so that the
COLOR TEMPERATURE and CONTRAST LIMIT adjustments start
automatically.
<COLORTEMPERATURE>
TheX and Yspecified readingsof the color analyzer are as follows:
<CONTRAST>
Thespecified contrast range is140±5cd/m2
Note: In case that the contrast is not within the specified range above,
repeat 4) to 7).
TheOSDdisappears.
Press the MENU Button so that the OSD appears.
All adjustment data is stored when the OSD disappears.
Turn OFF the Remote Switch of the color analyzer.
CT 1 (9300K)
X:0.283±0.008
Y:0.297±0.008
l
l
l
cd/m² fL
Luminance unit switch
Note: The adjustments above can be repeated by turning OFF and ON the
PowerSwitch.
n
1)
2)
Receivea 16-gradation gray scalesignal of MODE5.
Makesure the 15thgradationon the grayscale is barelyvisible when the
16th gradation (back raster) is not visible at all.
1-13. GRAY SCALE confirmationn

- 7 -
1-14. BRIGHTNESS adjustment [PWB-MAIN]
1)
2)
3)
Receivean entire whiteraster signal ofMODE 5.
Apply a photometer to the screen center.
AdjustVR502 (ABL-ADJ) so thatphotometer reads 105±5cd/m2.
1-15. SYNC SIGNAL INPUT confirmation
1)
2)
3)
Receiveacross-hatch inverted signalofMODE 5.
Select composite and sync on green signal inputs respectively by the
signalgenerator.
Confirm that the picture is displayed normally.
n
n
Brightness
VR502 ABL-ADJ
1-16. POWER MANAGEMENT confirmation
1)
2)
3)
4)
5)
6)
7)
8)
9)
Turn OFF the Power Switch and connect a digital wattage meter.
TurnON the Power Switch.
Receiveacross-hatch inverted signalofMODE 5.
Turn OFF the R, G and B outputs on the signal generator.
Disconnect the H/HV and V cables.
Confirmthattheinputwattageis 3W or less andthePowerIndicatorturns
toorange.
Connect the H/HV and V cables and confirm that the picture appears.
Turn OFFthe Power Switchand remove the digitalwattagemeter.
TurnON the Power Switch.
o
1-17. H-CONVERGENCE, TILT-DY confirmation
1)
2)
3)
Receivea cross-hatch invertedsignal of MODE5 or MODE6.
Select DA TEST 3 and press the MENU Button so that the automatic
confirmationprogramstarts.
Confirmthatverticalbluelinesaredivergedtotherightandthepicturetilts
to the left.
n

- 8 -
LMR
Fig.1
T Thin
M Thick
B Thin
Fig.2
Thin
Thick
Fig.3
Thick
LMR
1-19. FOCUS [PWB-MAIN]
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
Receivea green cross-hatchsignalof MODE 5.
AdjustFOCUS-AVR of T504(FBT)to make theverticallines sharpest at
points L, M and R as shown in Fig 1.
Adjust FOCUS-B VR of the T504 to make the horizontal center line
sharpest at points L, M and R as shown in Fig. 1.
If the focus at points T and M is as shown in Fig. 2, adjust V DBF in the
menu with the front buttons to make the horizontal lines have the same
thickness at points T, M and B. And adjust the FOCUS-B VR again to
make the horizontal lines sharpest at points T, M and B. (V DBF should
not be adjusted when focus at points T and M is optimum.)
If the focus at points L and M is as shown in Fig. 3 or vice versa, adjust
DBFPara and DBF Phasein the menuwith the front buttonsto make the
horizontal center line have the same thickness at points L, M and R.And
adjusttheFOCUS-BVRagaintomakethehorizontalcenterlinesharpest
at points L, M and R. (DBF Para and DBF Phase should not be adjusted
when focus at points L and M is optimum.)
Repeat 2) to 6) until the focus is optimum.
Confirmnofocus variation ontheentire screen.
Checkthe focus withred and blue respectively.
ReceiveaH-charactersignal and repeat 7).
Repeat the FOCUS adjustments until the focus with red, green and blue
is optimum.
1-18. RASTER REGULATION (DYNAMIC) confirmation
1)
2)
3)
4)
5)
Receivean entire whitesignal of MODE 6.
Set the input signal by the signal generator as follows:
V-DISPLAY-TIME:150 V-POSI-TIME:450
Maximize the brightness.
Confirm that ,W of the right hand side figure is 1.0mm or less when
turning the luminance volume on the signal generator to the maximum
and“1”respectively.
Returnthe brightness tocenter indication (adjustmentdata: 128).
n
n
FOCUS-A
FOCUS-B
SCREEN
T501(FBT)
Back-raster
Picture
W

1-20. LUMINANCE DIFFERENCE adjustment ( A705MT / i70A )
1)
2)
3)
4)
Receivean entire whitesignal of MODE 5.
Apply a photometer to C (center), L (left) and R (right) in the right hand
sidefigurerespectively.
ConfirmthattheluminancedifferencebetweenC,LandRiswithin±10cd/m2
respectively.
Ifthe luminance difference isnot within the specifiedrange above, adjust
VR501(UNIFORMITY).
C
B
T
R
L
n
1-21. LUMINANCE DIFFERENCE confirmation ( A705MT / i70A )
1)
2)
3)
Receivean entire whitesignal of MODE 5.
Apply a photometer to L (left) / R (Right), T (Top) and B (Bottom) in the
righthandside figure respectively.
Confirmthat the luminancedifference is the 22.5cd/m2 or less.
Luminance
VR501 UNIFORMITY
- 9 -

White (S side)
2.3±0.2
7±0.4
7.6±0.4
(in mm)
S
N
*Magnet (890Z008A01)
1-22-1. PURITY correction
Receiveanentire red raster signal.
Adjust the vertical and horizontal picture size to full-scan.
Face the CRT screen to north and south respectively and degauss
theentire screen with degausser.
Confirm that no color clash is visible.
If any partial color clash, correct the purity with the *magnet
(890Z008A01).
Note: Stick the magnet to the CRTwith DF-TAPE (890P329A10).
Perform degauss again.
Repeat 4) to 6) until the purity is optimum.
FixthemagnetwithACETATE-TAPE(890P306A10).
Note: Themagnet shouldbe fixed away from theDY notto change
distortionorconvergence.
1)
2)
3)
4)
5)
6)
7)
8)
Before ITC adjustments:
ReceiveanentirewhiterastersignalandturnONthePowerSwitch.Performadjustmentafterawarm-upofat least
anhour.
<CRT screen>
<Back view of CRT>
DY
Anode cap
*Magnet
Color clash
DF-TAPE (890P329A10)
- 10 -
1-22. ITC (Integrated Tube Component) adjustments
ThefollowingITCadjustmentsshouldbemadeonlywhena new picture tube isinstalled*1,orconvergenceispoor.
Allset-up adjustments above-mentioned mustbe completed before anyfurther ITC adjustment isattempted.
Performthe following adjustments bysetting H-convergence and Tilt-dyto center indication.
Notes: *1. UsetheCRT(251Z063-03)forreplacementoftheCRT(251Z063-04).
*2. SeeChapter 5 concerningparts list for the ITCadjustments.
*3. PURITYMAGNETshould not be turnedduringthe ITC adjustments.
n
ê
CRT face
PURITY MAGNET*3
4-POLE MAGNET
6-POLE MAGNET
BOW MAGNET
DEFLECTION
YOKE
SEPARATOR
DIFFERENTIAL
COIL
XV
LOCKING RING
+
+
X V
Y h(a)
Y V(a)
+
Y h(t)
PURITY MAGNET*3
4-POLE MAGNET
6-POLE MAGNET
BOW MAGNET
DEFLECTION
YOKE
SEPARATOR
DIFFERENTIAL
COIL
+
X V
YHC
YHB
X V
+
+
YV
LOCKING RING
ê
CRT face
< A705MT / i70A >
< S705MT >

1)
2)
Receivea red and bluecross-hatch signal.
AdjustthespecifiedYVvolume so that red andbluebeamsconverge
eachother at the upper andlower edges of the horizontalline.
1-22-5. YV adjustment
R
B
R
B
R,B
R,B
- 11 -
Receivea red and bluecross-hatch signal.
Adjustthe4-POLEMAGNETsothatredandbluebeamsconvergeonthe
center cross lines.
Add green to the red and blue cross-hatch signal.
Adjust the 6-POLE MAGNET so that red and blue beams converge with
green beam on the center cross lines.
Repeat the adjustment until red, blue and green beams converge each
other.
Fix the 4-POLE MAGNET and the 6-POLE MAGNET by turning the
LOCKINGRING.
Markthe4-POLE MAGNET and the6-POLEMAGNET with paint marker
(090Z029A01)sothat adjusted position isunderstandable.
1-22-2. STATIC CONVERGENCE adjustment
1)
2)
3)
4)
5)
6)
7)
R
B
R
B
G
R,B
G
R,B
R,G,B
R,G,B
1-22-3. BOW MAGNET adjustment
1)
2)
3)
4)
Receivea red and bluecross-hatch signal.
Adjust the BOW MAGNET so as to straighten an arched horizontal line.
Note: Mustbe careful notto misconvergevertical lines bythis adjustment.
Performthe1-22-2.STATICCONVERGENCEadjustmentsoastoconverge
the red and blue lines.
Fixthe BOW MAGNET withpaint (090Z020A01).
R
B
R
B
1-22-4. DIFFERENTIAL COIL adjustment (XV adjustment)
1)
2)
Receivea red and bluecross-hatch signal.
AdjusttheDIFFERENTIALCOILso that thehorizontalcrosslineconverge
eachother.
R
B
R,B

- 12 -
1-22-7. SCREEN-CORNER MISCONVERGENCE correction R
B
R
B
R
B
RB
Receivea red and bluecross-hatch signal.
Affixa *ferritesheet(890Z003A01/03/05)betweenSEPARATORandCRT
correspondingtothepartially misconverged areas.
Note: Must be careful not to affect distortion by this correction.
Fixtheferrite sheet withACETATE-TAPE (890P306A10).
1)
2)
3)
1-22-6. YH adjustment
1)
2)
Receivea red and bluecross-hatch signal.
AdjustthespecifiedYH volumes so thatverticalcrosslines converge
each.
R
B
R,B
BR
Y
h(t) (251Z063-03)
Y HC (251Z066-01) Y
h(a) (251Z063-03)
Y HB (251Z066-01)
(890Z003A01)
70
5
10
100
Ferrite
(890Z003A03)
*Ferrite sheet
(in mm)
(890Z003A05)
10
90

PQRS
OV-parameters
O: Total period
P: Sync.width
Q: Back porch
R: Active video
S: Front porch
Video
Sync
BCDE
AH-parameters
A: Total period
B: Sync.width
C: Back porch
D: Active video
E: Front porch
2. TIMING CHART
- 13 -
Mode
1
2
3
4
5
6
R
12.711
15.253
11.093
11.179
11.183
12.8
S
0.381
0.318
0.023
0.019
0.015
0.013
Vertical(msec)
@70Hz
@60Hz
@85Hz
@85Hz
@85Hz
@75Hz
640×400
640×480
640×480
800×600
1024×768
1280×1024
fH
(kHz)
31.469
31.469
43.269
53.674
68.677
80.00
fV
(Hz)
70.080
59.940
85.008
85.061
84.997
75.0
Sync polarity
H
N
N
N
P
P
P
V
P
N
N
P
P
P
Q
1.112
1.048
0.578
0.503
0.524
0.475
P
0.064
0.064
0.069
0.056
0.044
0.037
O
14.268
16.683
11.764
11.756
11.765
13.325
E
0.636
0.636
1.556
0.569
0.508
0.11
D
25.422
25.422
17.778
14.222
10.836
9.48
C
1.907
1.907
2.222
2.702
2.201
1.84
Horizontal(µsec)
B
3.813
3.813
1.556
1.138
1.016
1.07
A
31.778
31.778
23.111
18.631
14.561
12.5
Comp
–
–
–
–
–
–
Sync
on
green
–
–
–
–
–
–
VESATimingName

Deflectioncircuit
RefNo. Description Application
LA7840N H&V oscillator, Distortion / Size / Phase / DBF control
IC501 SLA5077 Cushion-S switching FET array
3. IC APPLICATION
- 14 -
IC801 TMP86CP11N Microprocessor
IC802 E2PROM(Memory: 8K)
HighvoltageoutputcontrolMSPAD104
Powercircuit
IC803 KIA7045/M51951 5V power watcher (Microprocessorsystem reset)
IC901 TEA1504 Mainpowercontrol
IC903 LM317T 12Vregulator
IC904 LM317T 6.3V regulator(HeatervoltageON/OFFcontrol)
IC905 KIA431 Feedbackcontrol
Specificationsof Microprocessor areon next page.Note:
IC201 M52743BSP Videopre-amplifier
IC906 KIA78DL05PI 5V regulator
IC502
Microprocessorcircuit
Highvoltagecircuit
Video circuit
IC205 LA6510 Power amplifier(TILT-DY,H-convergencecontrol)
IC203 M35047SP On screen display control
CRTcircuit
UPC1884
IC209 324 Poweramplifier(Cut-offcontrol)
IC301
IC401 Verticaldeflectionoutput
24C08
IC202 LM2415T Videooutput

Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Name
V-IN
H-IN
V-OUT
H-OUT
CLAMP
NC
NC
DDCSDA
DDCSCL
EROMSDA
EROMSCL
I2CSDA
I2CSCL
LED1
LED2
PS1
DEG
PS2
CLK
DATA-IN
DATA-OUT
Name
GND
XIN
XOUT
TEST
VDD
MODEL SW
CS1
RESET
CS2
H-CONV
TILT
SIZE
NC
CS3
CS4
NC
H-LIN
NC
KEY1
KEY2
VREF
Function
V-SYNCsignal input
H-SYNC / COMP signal input
V-SYNCsignal out
H-SYNCsignalout
Videoclamper
N.C.
N.C.
DDCDatainput/outputterminal
DDCClockterminal
E2PROMDatainput/outputterminal
E2PROMClock terminal
Upc1888/Pre/OSD/DA Data input/output terminal
Upc1888/Pre/OSD/DAClockterminal
LED1 control
LED2 control
Mainpoweroffsignal
Degausscontrol signal output
12Vpoweroffsignal
Automatic adjustment Clock terminal
AutomaticadjustmentDatainputterminal
AutomaticadjustmentDataoutputterminal
- 15 -
Function
GND
12MHzX'TAL
12MHzX'TAL
GND
5V Vcc
Modelswitching(A705:Low,S705:High)
Cushion-Sswitching signal 1
Reset
Cushion-Sswitching signal 2
H-convergence
Tilt
H-sizefreq.correctionvoltage output
N.C.
Cushion-Sswitching signal 3
Cushion-Sswitching signal 4
N.C.
Linearityswitching signal output
N.C.
Front+/ – keysignalinputterminal(+:0V, – :2.5V)
Front Menu key signal input terminal
5V Vcc
Microprocessor specifications
Pin
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22