Page 1
SERVICE MANUAL
WARTUNGSHANDBUCH
CAUTION:
technician read
Avant d’effectuer l’entretien du châassis, le technicien doit lire les
s
VORSICHT:
Vor
“
Data contained within this Service
alteration for
Les données fournies dans le
présent manuel d’entretien
peuvent faire l’objet de
modifications en vue de
tungshandbuch
enthaltenen Spezifikationen
nnen sich zwecks
Verbesserungen
ä
nde
rn.
No. 0501
CM715ET
Before servicing this chassis, it is important that the service
the “Safety Precautions” and “Product Safety Notices” in this service manual.
ATTENTION:
«Précautions de sécurité» et les «Notices de sécurité du produit» présenté
dans le présent manuel.
Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise
und „Hinweise zur Produktsicherheit“ in diesem Wartungshandbuch zu lesen.
MANUEL D’ENTRETIEN
manual is subject to
improvement.
perfectionner le produit.
Die in diesem War
kö
October 2000
Page 2
ENGLISH
SAFETY PRECAUTIONS
WARNING: The following precautions must be observed.
ALL PRODUCTS
Before any service is performed on the chassis an
isolation transformer should be inserted between the
power line and the product.
1. When replacing the chassis in the cabinet, ensure
all the protective devices are put back in place.
2. When service is required, observe the original
lead dressing. Extra precaution should be taken to
ensure correct lead dressing in any high voltage
circuitry area.
3. Many electrical and mechanical parts in
HITACHI products have special safety related
characteristics. These characteristics are often not
evident from visual inspection, nor can the
protection afforded by them necessarily be
obtained by using replacement components rated
for higher voltage, wattage, etc. Replacement
parts which have these special safety
characteristics are identified by marking with a
! on the schematics and the replacement parts
list.
The use of a substitute replacement component
that does not have the same safety characteristics
as the HITACHI recommended replacement one,
shown in the parts list, may create electrical
shock, fire, X-radiation, or other hazards.
4. Always replace original spacers and maintain lead
lengths. Furthermore, where a short circuit has
occurred, replace those components that indicate
evidence of overheating.
5. Insulation resistance should not be less than 2M
ohms at 500V DC between the main poles and
any accessible metal parts.
6. No flashover or breakdown should occur during
the dielectric strength test, applying 3kV AC or
4.25kV DC for two seconds between the main
poles and accessible metal parts.
7. Before returning a serviced product to the
customer, the service technician must thoroughly
test the unit to be certain that it is completely safe
to operate without danger of electrical shock. The
service technician must make sure that no
protective device built into the instrument by the
manufacturer has become defective, or
inadvertently damaged during servicing.
CE MARK
1. HITACHI products may contain the CE mark on
the rating plate indicating that the product
contains parts that have been specifically
approved to provide electromagnetic
compatibility to designated levels.
2. When replacing any part in this product, please
use only the correct part itemised in the parts list
to ensure this standard is maintained, and take
care to replace lead dressing to its original state,
as this can have a bearing on the electromagnetic
radiation/immunity.
PICTURE TUBE
1. The line output stage can develop voltages in
excess of 25kV; if the E.H.T. cap is required to be
removed, discharge the anode to chassis via a
high value resistor, prior to its removal from the
picture tube.
2. High voltage should always be kept at the rated
value of the chassis and no higher. Operating at
higher voltages may cause a failure of the picture
tube or high voltage supply, and also, under
certain circumstances could produce X-radiation
levels moderately in excess of design levels. The
high voltage must not, under any circumstances,
exceed 29kV on the chassis (except for projection
Televisions).
3. The primary source of X-radiation in the product
is the picture tube. The picture tube utilised for
the above mentioned function in this chassis is
specially constructed to limit X-radiation. For
continued X-radiation protection, replace tube
with the same type as the original HITACHI
approved type
4. Keep the picture tube away from the body while
handling. Do not install, remove, or handle the
picture tube in any manner unless shatterproof
goggles are worn. People not so equipped should
be kept away while picture tubes are handled
LASERS
If the product contains a laser avoid direct exposure to
the beam when the cover is open or when interlocks are
defeated or have failed.
2
Page 3
FRANÇAIS
CONSIGNES DE SECURITE
AVERTISSEMENT: vous devez respecter les précautions suivantes
POUR TOUS LES PRODUITS
Avant d’effectuer une intervention d’entretien sur le
châssis, vous devez insérer un transformateur d’isolement
entre la ligne d’alimentation électrique et le produit.
1. Lors de la remontage du châssis dans le coffret,
vérifiez que tous les dispositifs de protection sont
remis en place.
2. Lorsqu’une intervention d’entretien s’avère
nécessaire, respectez l’agencement d’origine des
conducteurs. Vous devez prendre des précautions
supplémentaires pour garantir un agencement correct
des conducteurs dans toutes les zones où des circuits
haute tension sont présents.
3. De nombreux composants électriques et mécaniques
des appareils HITACHI ont des caractéristiques
spéciales de sécurité. Bien souvent, ces
caractéristiques ne sont pas évidentes lors d’un
examen visuel et la protection qu’ils offrent n’est pas
forcément garantie si vous utilisez des composants de
rechange conçus, par exemple, pour une tension plus
élevée, une puissance plus forte. Les pièces de
rechange qui offrent des caractéristiques spéciales de
sécurité sont identifiées par un repérage comportant
le symbole ! sur les schémas et sur la
nomenclature des pièces de rechange.
L’emploi d’un composant de rechange qui ne
respecte pas les mêmes caractéristiques de sécurité
que la pièce de rechange que recommande HITACHI
et qui figure dans la nomenclature risque de
provoquer un choc électrique, un incendie, des rayons
X ou d’autres dangers.
4. Remettez toujours en place les entretoises d’origine
et respectez la longueur des conduites. En outre, à la
suite d’un court-circuit, remplacez les composants
présentant des signes de surchauffe.
5. La résistance d’isolement doit être supérieure ou
égale à 2 méga ohms à 500 V c.c. entre les pôles
principaux et des composants métalliques
accessibles, quels qu’ils soient.
6. Aucun claquage et aucune rupture ne doit se produire
pendant l’essai de résistance diélectrique à la suite de
l’application d’une tension de 3 kV c.a. ou de 4,35
kV c.c. pendant deux secondes entre les pôles
principaux et des composants métalliques
accessibles.
7. Avant de remettre au client un produit qui a fait
l’objet d’un entretien, le technicien qui s’est chargé
de cette intervention doit tester à fond cet ensemble
pour s’assurer qu’il ne présente aucun danger
opérationnel et aucun risque de choc électrique. Ce
technicien doit s’assurer qu’aucun des dispositifs de
protection intégrés à cet instrument par le fabricant
n’est défectueux ou n’a été endommagé de façon
accidentelle lors de l’entretien.
3
LABEL CE
1. Les produits HITACHI peuvent avoir reçu le label
CE qui figure sur la plaque signalétique pour indiquer
que cet ensemble contient des composants qui ont fait
l’objet d’une homologation spécifique de respect des
normes de compatibilité électromagnétique en
fonction de niveaux bien spécifiés.
2. Lors du remplacement d’un des composants de ce
produit, utilisez uniquement le composant correct
identifié dans la nomenclature afin de maintenir le
respect de cette norme ; en outre, vous devez
également ramener l’agencement des conducteurs à
son état d’origine car cela peut avoir une influence au
niveau des rayonnements électromagnétiques et sur la
protection contre ces rayons.
PICTURE TUBE
1. L’étage de sortie des lignes peut développer des
tensions de plus de 25 kV ; s’il faut retirer le chapeau
de protection contre les tensions extrêmement
élevées, il convient de décharger l’anode contre le
châssis par le biais d’une résistance de forte valeur
avant de déposer ce chapeau du tube image.
2. La haute tension doit toujours se maintenir à la valeur
nominale du châssis et ne pas dépasser cette dernière.
Un fonctionnement à des températures élevées peut
provoquer une défaillance du tube image ou l’entrée
d’une tension élevée. Dans certains cas, cela peut
même provoquer des rayons X d’un niveau
légèrement supérieur aux valeurs de calcul. Cette
haute tension ne doit en aucun cas dépasser 29 kV sur
le châssis (à l’exception des téléviseurs de
projection).
3. La principale source de rayons X de cet appareil est
le tube image. Le tube image employé pour assurer la
fonction susmentionnée dans ce châssis est
spécialement construit pour limiter des rayons X.
Pour maintenir cette protection contre les rayons X, il
faut remplacer le tube d’origine d’un type agréé par
HITACHI par un autre tube de même type.
4. Lors des manipulations, ne tenez jamais le tube
image contre le corps. Pendant toutes les opérations
d’installation, de dépose et de manipulation de ce
tube image, quelle que soit la méthode employée,
vous devez toujours porter des lunettes de sécurité
anti-éclatements. Les personnes qui ne portent pas ce
type de lunettes doivent se tenir à l’écart du tube
image lors de la manipulation de ce dernier.
RAYONS LASER
Si ce produit contient un rayon laser, évitez toute
exposition directe à ce faisceau lors de l’ouverture du
couvercle ou lors de l’élimination des verrouillages de
sécurité ou après défaillance de ces verrouillages.
Page 4
DEUTSCH
SICHERHEITSVORKEHRUNGEN
WARNUNG: Die folgenden Vorkehrungen müssen eingehalten werden.
ALLE PRODUKTE
Bevor die Grundplatte gewartet wird, sollte ein Trenntrafo
zwischen die Netzleitung und das Produkt eingebracht
werden.
1. Wenn die Grundplatte in das Gehäuse zurückgestellt
wird, stellen Sie sicher, dass alle
Schutzvorrichtungen wieder an ihrem Ort sind.
2. Wenn Wartung erforderlich ist, halten Sie die
originale Verdrahtungsart ein. Besondere Vorsicht ist
nötig, um die korrekte Verdrahtungsart in jedem
Hochspannungsstromkreis zu gewährleisten.
3. Viele elektrische und mechanische Teile von
HITACHI Produkten haben besondere
sicherheitsbezogene Eigenschaften. Diese
Eigenschaften fallen oft nicht ins Auge, aber der
durch sie gewährte Schutz kann nicht unbedingt
erreicht werden, wenn man Ersatzteile benutzt, die
für höhere Spannung, Leistung usw. ausgelegt sind.
Ersatzteile, die diese besonderen
Sicherheitsmerkmale haben, sind in den
Prinzipskizzen und Ersatzteillisten an einem ! zu
erkennen.
Der Gebrauch von Ersatzteilen, die nicht dieselben
Sicherheitsmerkmale haben wie die empfohlenen
HITACHI Ersatzteile, wie sie in der Ersatzteilliste
aufgeführt sind, kann zu elektrischem Schlag, Feuer,
Röntgenstrahlung und anderen Gefahren führen.
4. Immer die originalen Abstandsstücke ersetzen und
die Leitungslängen beibehalten. Wo ein Kurzschluss
passiert ist, die Teile ersetzen, bei denen Überhitzung
nachzuweisen ist.
5. Der Isolierwert sollte bei 500 V Gleichstrom
zwischen den Hauptpolen und allen zugänglichen
Metallteilen nicht unter 2M Ohm liegen.
6. Bei der Prüfung auf Durchschlagsfestigkeit sollte
kein Überschlag oder Durchschlag vorkommen,
wenn zwei Sekunden lang 3 kV Wechselstrom oder
4,25 kV Gleichstrom zwischen den Hauptpolen und
allen zugänglichen Metallteilen angelegt wird.
7. Bevor das gewartete Produkt dem Kunden
zurückgegeben wird, muss der Wartungstechniker
das Gerät gründlich prüfen, um sicherzustellen, dass
es betriebssicher ist ohne das Risiko eines
elektrischen Schlages. Der Wartungstechniker muss
sicherstellen, dass keine vom Hersteller im Gerät
eingebaute Schutzvorkehrung schadhaft geworden ist
oder bei der Wartung unabsichtlich beschädigt
wurde.
CE KENNZEICHEN
1. HITACHI Produkte enthalten eventuell das CE
Kennzeichen auf dem Leistungsschild, welches
angibt, dass das Produkt Teile enthält, die eigens
zugelassen sind, um bis zu einem spezifizierten
Niveau elektromagnetische Störfreiheit zu bewirken.
2. Wenn Sie irgendein Teil in diesem Produkt ersetzen,
benutzen Sie bitte nur das korrekte Teil, das in der
Ersatzteilliste aufgeführt ist, um sicherzustellen, dass
dieser Standard eingehalten wird, und geben Sie acht,
die Verdrahtungsart in ihren ursprünglichen Zustand
zurück zu versetzen, weil das einen Einfluss auf die
elektromagnetische Abstrahlung/Störsicherheit haben
kann.
BILDRÖHRE
1. Die Leitungsausgangsstufe kann Spannungen von
mehr als 25 kV entwickeln; wenn die
Höchstspannungskappe entfernt werden muss,
entladen Sie die Anode zum Gehäuse über einen
hochohmigen Widerstand, bevor Sie sie aus der
Bildröhre entfernen.
2. Hochspannung sollte immer auf den festgelegten
Wert des Gehäuses beschränkt bleiben und nicht
mehr. Betrieb bei höherer Spannung kann zum
Versagen der Bildröhre oder zu hoher
Spannungszufuhr führen und kann unter Umständen
auch Röntgenstrahlung hervorbringen, die leicht über
dem Konstruktionsniveau liegt. Die Hochspannung
darf auf keinen Fall 29 kV am Gehäuse überschreiten
(außer bei Projektionsfernsehern).
3. Die Hauptquelle der Röntgenstrahlung im Produkt ist
die Bildröhre. Die Bildröhre, die für die oben
erwähnte Funktion in diesem Gehäuse benutzt wird,
ist eine Spezialkonstruktion zur Begrenzung der
Röntgenstrahlung. Um den Schutz vor der
Röntgenstrahlung zu behalten, ersetzen Sie bitte die
Röhre durch denselben Typ wie den ursprünglichen
von HITACHI zugelassenen.
8. Halten Sie die Bildröhre bei der Handhabung vom
Körper weg. Sie dürfen die Bildröhre nur dann
installieren, entfernen oder handhaben, wenn Sie eine
nicht splitternde Schutzbrille tragen. Personen ohne
derartigen Schutz sollten ferngehalten werden,
solange Bildröhren gehandhabt werden.
LASER
Wenn das Produkt einen Laser enthält, setzen Sie sich
keinesfalls direkt dem Strahl aus, wenn die Abdeckung
geöffnet ist oder wenn die Verriegelung versagt.
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Page 5
1. DISPLAY ALIGNMENT................................................................7
A. Time & Display Size ......................................................................................................7
B. Picture Position..............................................................................................................7
C. Linearity.........................................................................................................................7
D. Geometry Distoriton (All Preset Modes) ......................................................................8
E. Alignment Procedure.....................................................................................................8
F. White balance alignment ..............................................................................................9
G. Focus Adjustment .........................................................................................................10
H. Convergence Adjustment..............................................................................................10
I. Presetting Modes Adjustment.......................................................................................10
J. Power Adjustment.........................................................................................................11
2. CONTROLS AND CONNECTORS LAYOUT ..............................15
A. Main PCB ......................................................................................................................15
B. Video PCB.....................................................................................................................16
C. Pin Assignment .............................................................................................................17
3. Power Supply Portion ................................................................18
4. OPERATION THEORY ................................................................19
A. Power Supply ................................................................................................................19
B. Deflection.......................................................................................................................19
C. Video .............................................................................................................................19
D. Digital Controllor............................................................................................................19
E. Function Block Diagram ................................................................................................20
F. Power Supply.................................................................................................................21
G. Deflection ......................................................................................................................22
H. Flyback Transformer......................................................................................................24
I. Video AMP Circuit..........................................................................................................26
5. TROUBLESHOOTING.................................................................22
A. Power Supply Check .....................................................................................................28
B. Monitor Check Flow Chart.............................................................................................29
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6. PARTS LISTINGS..........................................................................30
CRT Board VQ-903.............................................................................................30
Switch Board VR-903..........................................................................................34
Deflection & Power Board VA-903........................................................................35
7.SCHEMATIC DIAGRAMS..............................................................50
CRT Board.........................................................................................................50
Deflection, Power & Switch Board 1.....................................................................51
Deflection, Power & Switch Board 2.....................................................................52
Deflection, Power & Switch Board 3.....................................................................53
Deflection, Power & Switch Board 4.....................................................................54
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1. DISPLAY ALIGNMENT
A. Times & Display Size
For all presetting mode listing in section 2.4 shall be within the limitation:
H. WIDTH 306 ± 4 mm
V. HEIGHT 230 ± 4 mm
The external control range of the data area, shall be as follows;
Max. horizontal size : overscan the screen
Min. horizontal size : ≤ 285mm
Max. vertical size : over the screen
Min. vertical size : ≤ 202 mm
B. Picture Position
For all presetting mode listing in section 2.4 shall be within the limitation:
H.PHASE SCREEN CENTER ± 3 mm
V.CENTER SCREEN CENTER ± 3 mm
The external control ranges of display for all modes listed in section 2.4
H.POSITION ≥ 50 mm
V.CENTER ≥ 25 mm
C. Linearity
The CONTRAST and BRIGHTNESS control shall be properly adjusted at 20 F-L with Full-intensity reverse
pattern, then change to crosshatch Pattern 12x10 (Hx V), the size of grid of crosshatch pattern in every display
mode shall not vary than 10%.If two line is next to each other, 5% if they are not next to each other. The calculation
formula was listed below:
H max - H min V max - V min
x100% or x 100%
(H max + H min) / 2 (V max + V min) / 2
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Page 8
D. Geometry Distortion (All Preset Mode) :
1) The Contrast and Brightness control shall be properly adjusted at 20 F-L with full intensity reverse
pattern, then change to crosshatch pattern.
2) Pincushion distortion shall be less than H : 1.5% and V : 1.5%.
3) Barrel distortion shall be less than H : 1.5% and V : 1.5%.
4) Trapezoid and parallelogram distortion shall be less than H : 1.5% and V : 1.5%.
5) Distortion of four corners shall be less than 3mm x 3mm.
6) Parallelogram distortion shall be less than 2.0%
7) Tilt distortion shall be less than 1/2 degree when facing east and less than 1 degree when turning
around 360 degree.
8) Tilt distortion shall be less than 2 mm when facing east and less than 1 degree when turning around
360 degree The measurement of tilt is defined to measure the vertical axis with respect to the bezel,
the absolute value of the difference between the extreme left and right measurement of the center
horizontal line.
E. Alignment Procedure
E-1. Brightness Adjust:
1. Adjust the VR980, have the +15VS By 14.9V ±0.1V (The voltage of the C944) in TIMING 1.
2. Check below items.
The voltage of C949 : 179 ± 3V
C947 : 75 ± 2V
C946 : 44 ± 1.5V
C940 : 8.4 ± 0.4V
P990 : 12 ± 0.3V
3. Short-Circuit protection function check.
The power source is 230VAC input.
When short the C944, all output voltage should be shut down and unlatch.
When recover normal condition, all output voltage should recover automatically.
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E-2. Light output adjust
Select Timing 1, preset BRI. And CONT. to max. position.
Adjust G2 to get G2 = 550V ± 10V
Adjust VR803 to get light output = 0.6FL ~ 0.5FL
Select Timing 2, adjust VR405 to get pattern over scan. (H SIZE 100%)
F. White Balance Adjustment (9300°as major temperature) Low light
adjust
9300° 6500° 5000°
x = 0.283 ± 10 x = 0.313 ± 10 x = 0.324 ± 10
y = 0.297 ± 10 y = 0.329 ± 10 y = 0.342 ± 10
Y = 0.6 ~ 0.8FL Y = 0.6 ~ 0.8FL Y = 0.6 ~ 0.8FL
1. Select Timing 6, adjust BRI. And CONT. to max. disconnect R. G. B. signals, adjust R/B BAIS to 100 scale (OSD
then slowly adjust G BAIS to 100 scale adjust VR803 to get light output = 0.6 ~ 0.8FL for 9300, repeat above
steps for 6500 and 5000 R/B GAIN setting to get raster color temperature within specified, finally, adjust BRI to
get raster = 0.06FL.
2. High light adjust
9300° 6500° 5000°
x = 0.283 ± 10 x = 0.313 ± 10 x = 0.324 ± 10
y = 0.297 ± 10 y = 0.329 ± 10 y = 0.342 ± 10
Y = FL Y = FL Y = FL
-0
+5
Select Timing 4, measure 2" square, set CONT. to Max, position and SUB-CONT to 127, R/B GAIN to 200, G
GAIN to 200, adjust SUB-CONT to get light output = 50 FL for 9300, repeat above steps for 6500 and
5000 R/B GAIN setting to get color temperature within specified.
3. Select Timing 3 with full white pattern adjust OSD-ABL (SUB BRIGHTNESS) to get full white light output = 30
-0
+5
-0
+5
-0
+5
± 1 FL.
G. Focus Adjustment
G-1. Adjust brightness, have the brightness of raster be 0.06FL and contraset be 35FL in timming 6.
G-2. Adjust the G4a and G4b of theFBT, have focus be in the best condition on the 1/4 diagonal of
screen in timing 5.
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H. Convergence Adjustment
Input R+B and R+G signals, make sure convergence within specified (if not 4 pole and 6 pole). A zone =
0.3MM., B zone 0.4MM. (X) < 0.4MM, (Y) < 0.4MM.
NOTE : 1 A area = 230mm (circle)
2 B area = 306 x 230 mm
I. Presetting Modes Adjustment
There are totally 12 preset modes, individual adjust is needed.
1. H-SIZE adjust : adjust control key to get H-SIZE = 306 ± 2mm.
2. H-CENTER adjust : adjust control key to get center within ± 2mm
3. V-SIZE adjust : adjust control key to get V-SIZE = 230 ± 2mm
4. V-CENTER adjust : adjust control key to get center within ±2mm
5. Geometric adjust : adjust control key to get minimize distortion.
6. H-linearity check : check and make sure linearity meet spec.
(CROSS HATCH PATTERN 10X8)
2(MAX - MIN)
X100%
MAX + MIN
Any : <10%
Adjacent : <5%
7. V-linearity check : check and make sure linearity meet spec.
2(MAX - MIN)
X100%
MAX + MIN
Any : <10%
Adjacent : <6%
8. Geometric check : check and make sure geometric meet spec.
9. Get into OSD select EE-USER item, press ENTER till OSD disappear then turn off power, disconnect JP1, turn
on power again, make sure all of the alignment parameters has been stored properly, make H-SIZE adjust range
can OVER SCAN and -5%, PHASE adjust range >15mm, V-SIZE adjust range can OVER SCAN and -6%,
V-CENTER adjust range >20mm and make sure TILT adjust work properly.
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J. Power Adjustment
J-1. Adjust the VR980, have the +15Vs be 15.3v ±0.1v (the voltage of the C944) in timing 1.
J-2. Check below items the voltage of C949 : 179
C947 : 75
C946 : 44
C940 : 8.4
J-3. Short-circuit protection function check
the power source is 230V ac input
when short the C944, all output voltage should be shut down and unlatch
when recover normal condition, all output voltage should recover automatically.
J-4. Side Pincushion, Tilt and Geometry Distortion Adjustment
1. Input timing 1, adjust the display be normal position and size.
2. Adjust front control key to get the best pincushion distortion and tilt.
3. Select P502 and adjust VR402~VR404 to get the best geometry distortion.
J-5. Focus Adjustment
±±±±
±±±±
±±±±
0.4v
2v
1.5v
±
3v
1. Input timing 1, EXT. BRIGHTNESS move to center position. Use EXT.CONTRAST set the brightness to
25FL.
2. Adjust Focus VR (mounting on F.B.T), to get best focus.
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J-6. Preset Timing Adjustment
1. Input each PRESET MODE timing, and use front control key to adjust the display to the normal position
and size, and wait for 5 seconds.
2. Switch to next timing, repeat process 1 until every PRESET MODE timing has been adjusted.
J-7. Timing And Pattern
Timing mode pattern.mdnm/
1 VESA 68.6k CROSS HATCH
2 VESA 68.6K 2" SQUARE
3 VESA 68.6K FULL WHITE
J-8. Power Saving Function Check
1. The power source is 230V ac input
2. When the sync signal is removed, the monitor should enter SUSPEND mode and then OFF mode.
3. When power saving, the power consumption of monitor should be less than SUSPEND mode (8W) OFF mode
4. The monitor recovery time from SUSPEND mode or OFF mode to ON mode should be less than 5 seconds.
TABLE 1
TIMING MODE PATTERN
1. 64K
2. 37.8K/60HZ
3. 60K Full-white
4. 60K
5. 68K “me”
6. 68K
5×2″squares
5×2″squares
51 CROSSHATCH
51 CROSSHATCH
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PRESETTING MODES TABLE 2
D:display
1 VGA
IBM
2
VGA
3 VESA
4 VESA
IBM
5
VGA
6 VESA
7 VESA
8 VESA
VESA
9
IBM
XGA
10 VESA
11 VESA
12 VESA
13 VESA
640
350
640
480
640
480
640
480
720
400
800
600
800
600
800
600
1024
764
1024
768
1024
768
1152
864
1280
1024
25.175
P/N
25.175
N/N
31.5
N/N
36
N/N
28.321
N/P
40
P/P
49.5
P/P
56.25
P/P
65
N/N
78.75
P/P
94.5
P/P
108
P/P
108
P/P
31.469
70.087
31.469
59.940
37.5
75
43.269
85.008
31.468
70.085
37.879
60.317
46.875
75
53.674
85.061
48.363
60.004
60.023
75.029
68.677
84.997
67.5
75
63.981
60.02
31.778
14.268
31.778
16.683
26.667
13.333
13.111
11.764
31.468
70.085
36.4
16.579
21.333
13.333
18.631
11.756
20.677
16.666
16.66
13.328
14.561
11.765
14.815
13.333
15.63
16.661
25.422
11.122
25.422
15.253
20.317
12.8
17.778
11.903
31.778
14.268
20
15.84
16.162
12.8
14.222
11.179
15.754
15.88
13.003
12.795
10.836
11.183
10.667
12.8
11.852
16.005
B:backporc
h
907
1.875
907
1.0169
3.81
0.427
2.222
0.578
25.422
12.711
2.2
0.607
3.232
0.448
2.702
0.503
2.462
0.6
2.235
0.466
2.201
0.524
2.37
0.474
2.296
0.594
P:pulse F:front
3.813
0.064
813
0.064
2.032
0.08
1.556
0.069
1.907
1.0804
3.2
0.106
1.616
0.064
1.138
0.056
2.092
0.124
1.219
0.05
1.016
0.044
1.185
0.044
1.037
0.047
636
1.207
636
0.318
0.508
0.027
1.556
0.023
0.636
0.413
1
0.026
0.323
0.021
0.569
0.019
0.369
0.063
0.203
0.017
0.508
0.015
0.593
0.15
0.444
0.016
13
Page 14
Fig. 2
Fig. 3
14
Page 15
2. CONTROL AND CONNECT LAYOUT
Main PCB
15
Page 16
16
B. Video PCB
Page 17
C. Pin Assignment
C-1. Connect Function
VR501 : H-CENTER VR
P701 : TILT CONN
P8 : CANCEL COIL CONN
JP1: PRESET CONN
P902 : DEGAUSSING COIL CONN
P703 : X-RAY TEST PAD
-- P302 P303 P301 P5
1 HFLB Vout DSUB9 DDC-SCL
2 GND EEP-SCL R-IN DDC-SDA
3 G1 EEP-SCL GND GND
4 6.3V H-OUT B-IN V-SYNC
5 5V GND GND H-SYNC
6 75V -- G-IN -7 12V -- GND -8 CONTRAST -- -- --
17
Page 18
3. Power Supply Portion
18
Page 19
4. OPERATION THEORY
A. Power Supply:
Transfer AC source to DC source that supply all the circuit power. It includes:
(1) +12V: For video pre-amp circuit, parts of horizontal and vertical deflection circuit.
(2) +180V: For deflection and H.V circuit
(3) +7.5V: For CRT heater and u-P power.
(4) +75V: For video AMP. Circuit.
(5) +42V: For vertical deflection and Horizontal predriver.
(6) +16V: For vertical preampifier
B. Deflection:
Produce YOKE deflection current of horizontal and vertical, CRT H.V and bias that makes screen raster.
C. Video
Amplify the video signal and add the signal to the cathode of CRT to produce video on the screen.
D. Digital Controllor
With the EEPROM and PROGRAM, the micro-processor(u-P) control all the picture performance.
From the key control, the user can change the H-size, V-size, R-gain.…etc.
19
Page 20
20
E. Function Block Diagram
Page 21
F. Power Supply
F-1. Rectifier And Filter Ckt
The 90Vac-265Vac input line voltage is rectified by D901- D904, and smoothed by C906 to provide DC
operating voltage for the circuit.
F-2. Flyback And PWM Ckt
When power is initially applied to the circuit, C909 charges through R903, Q902.When the voltage across
C909 reaches a level of 16V, U901 is enabled, turning on Q901 and turning off Q902 to complete start-up
action.
During the On-time of Q901, energy is stored in T900. At this time the polarity of the output windings is such
that all output rectifiers are reverse biased and no energy is transferred. Primary current is sensed by R914 and
compared to a DC level that is determined by voltage feedback. When this level is reached, Q901 is turned off
and the polarity of all T900 windings reverses , forward biasing the output rectifiers. All the energy stored is
now transferred to the output capacitors. Many cycles of this store/release action are needed to charge the
outputs to their respective voltages.
The voltage across C949 is fed through a voltage divider R944, R945, R946, R947 and VR901 to the error
amplifier U900 and compared to an internal 2.5V reference, then determine the feed back level of U901 PIN1.
F-3. Snubber Ckt
Energy stored in the leakage inductance of T900 cause a voltage spike which be added to the normal reset
voltage across T900 when Q901 turn off. The clamp consisting of D905, R904 and C907 limits this voltage
excursion from exceeding the Vds rating of Q901. In addition, a turn off snubber made up of D906, R905 and
C908 keeps power dissipation in Q901 low by delaying the voltage rise until drain current has decreased from
its peak value. This snubber also damps out any ringing which may occur due to parasitic.
F-4. Synchronized Ckt
The oscillator frequency is defined by R912 , C920. The equation is approximately : Fosc=1.8/ (R912*C920).
The external signal “SYN+ & SYN -”
that comes from horizontal circuit T802 can synchronize the working frequency of power circuit Via
ZD903,R918,R919 and R916.
F-5. Power Saving Ckt
The monitor has ON, Suspend/Standby and OFF states.The monitor enters Suspend/Standby mode if either
V-sync or H-sync signals are removed. When the machine in the Suspend/Standby State, PS1 should be low to
turn off +15Vs. In this state, input power should be less than 15W and D960 LED illuminate yellow. The
monitor enters OFF mode if both H-sync and V-sync are removed. When in the OFF State, PS1 and PS2
should below simultaneously to turn off +15Vs and +8.3Vs outputs. In this state, input power should be less
than 5W and D960 LED illuminate amber.
21
Page 22
F-6. Degauss Ckt
The DEGU signal which comes from micro-p to control degauss coil act or not.
When DEGU is high, Q950 will be saturated to make RL901 working, AC line provides
a degaussing current to degauss coil.
F-7. OVERLOAD PROTECTION CKT
The primary current flows through the current sensing resistor R914. The voltage drop on R914 will be
rectified by D927 and keep a DC level on C927 that is dependent on the output power. When this DC level
reach the trigger voltage of Q920, the pin 1 of U901 goes low and the power stage is immediately switched
off.
F-8. BROWN – OUT CKT
When the input voltage down below the setting level (85Vac-75Vac), Q904 will be supplied a trigger voltage
to make Q920 turn on and this time, power supply shall be shut down.
G. Deflection
G-1. Sync Processor
H-sync & V-sync or input to U1(u-P), then u-P output the H-out & V-out to
U401 (TDA4858).
G-2. Hor. Processor & Vert. Pre-Amp
Fig.2 is the block diagram of IC TDA4858.
Hor. Processor
The H-out that come from u-P will input to the pin 15 of U401,it will be compared
with the oscillator sawtooth voltage by the PLL1(pin 26) phase detector, After that, it will be compared again
with the flyback pulse (pin 1) by the PLL2. The PLL2 detector thus compensates for the delay in the external
horizontal deflection circuit by adjusting the phase of the HDRV(pin 7) output pulse.
+B control
The U401 pin 5 to pin 3 is Operation Amplifier from pin 11 EW DRV parabola amplitude DC, H-Size and
Trapezium correction wave from connection, pin 6 is forward PWM output, driver the Q420, Q422 all mode
+B is 180V
Vert. Pre-am
Vertical oscillator will be triggered by V-out (pin 14). It is available to get sawtooth waveform in pin 24.
V-center, V-amp and V-linearity can be adjusted in pin 17, 18 and 19. The vertical output driver comes from
pin 12 and 13.
22
Page 23
G-3. Vertical Output
IC U601 (TDA 4866) is the vertical amp IC, the output pin 6 connects to the YOKE. The sawtooth current flows
across the YOKE to make vertical deflection. Fig.3 is the block diagram of IC TDA4866
G-4. Horizontal Driver Circuit
The driver pulse that comes from U401 pin 7 drives Q417, Q416, to Q503, then transfomer T501 converts driver
pulse to driver current to drive horizontal output transistor Q504.
G-5. Horizontal Output Stage
31K →35K →37K → 43K → 46K → 53K → 60K → 64K → 68K
SW4
C515
SW3
C539
SW2
C521
SW1
C520
L H H H H H H H
L L L L H H H H
L L L H L L H H
L L H H L H L H
L:ACTION
23
Page 24
H. Flyback Transformer
In the primary of FBT, there is about 900Vpp in the LC resonant interval,
It convert to the secondary of FBT to produce about 26KV for CRT anode voltage.
The other bias for CRT IS G4. G3(4~8KV), G2(0~1000V) and G1(-160V)
24
Page 25
H-1. . BLOCK DIAGRAM
25
Page 26
I. VIDEO AMP. CIRCUIT
I-1. VIDEO PRE. AMP.
The video pre-amp IC is U301 (KA2143B). The input signal is 0.7Vpp, then pre-amp IC U301 amplify the
video signal to 4~5Vpp. The WHITE BALANCE and CONTRAST shall be adjusted by adjustment the bias
voltage of U301. Fig.4 is the block diagram.
I-2. VIDEO AMPLIFIER
The video amplifier is U303 (LM2439), it amplify video signal to about 40Vpp. Video output signal add to
cathode by AC coupling. The DC bias is controlled by the output pwm of IC U302.
Fig.5 is the block diagram
I-3. BLOCK DIAGRAM
KA2143B
26
Page 27
LM2439
Simplified Schematic Diagram (One Channel)
27
Page 28
Check and replace EMI Filter
Check and replace ZD903, R918,
5. TROUBLESHOOTING
A. Power Supply Check
Start
Check
fuse open
Is
Q901 VDS
waveform normally?
Is 8V
in spec?
Is 15V
in spec?
Is B+voltage
correct?
Combine with
monitor check operating
frequency?
Yes
No
No
No
No
No
and Q901, I/P Rectifer
and filter
Check and replace Q902,
Q903, U901, D908, R908
Check D940, C940, Q940,
Q941, VR901
Check D941, C944, Q942, Q943
Check D944, D945, C949, Q504,
R538, Q505
R919, R916, D911, C920
OK
Stop
28
Page 29
B. Monitor Check Flow Chart
B-1. No Raster
No raster
Check power
indecator lighted
Yes
Check
contrast & brightness
control adjust to MAX.
Yes
Check
HEATER voltage= 6.3 VDC
G1= -50-70 VDC
G2= 350-700VDC
Yes
Check CRT
No
No
FBT pin1
about 700Vpp
Check Q801
Check AC
power input
Yes Yes
Yes
Check Q504
collector voltage
about 900 Vpp
Yes
Check U801 pin6
seqarewave from
No
U801 pin7 Vcc
Check power
supply circuit
Check
power supply
circuit
No
No
Check U401
No
Check U401
pin7 output
sequare wave from
Yes
Check Q417, Q416
Yes
CheckQ505 "S" pin
voltage 180VDC
Yes
Check T802 D506
29
Page 30
THE UPDATED PARTS LIST
FOR THIS MODEL IS
AVAILABLE ON ESTA
Page 31
GND
GND
P303
C213
0.01U
P301
P302
R213
2.2K
5
4
3
2
1
1
2
3
4
5
6
7
9
8
7
6
5
4
3
2
1
CLAMP
EEP-SCL
EEP-SDA
V-OUT
R210
1K
DSUB9
R-IN
GND
B-IN
GND
G-IN
GND
75V
ABL
12V
6.3V
5V
H-BLK
GND
G1
V350
C1906
GND
R212
2.2K
Q201
D234
R251
1/2W1K
L251
0.01U
R351
1K
1/4W
C351
C372
1U
100V
NP
D371
1SS82
BEAD
R330
82
1/2W
R350
82
1/2W
R370
82
1/2W
SG2
200V
GND
D333
GND
D331
1SS82
D373
R354
R353
24K
1/4W
Q351
BF420
GND
R352
3.3K
GND
L310
BEAD
GND
C201
C202
.22U
MEF
C204
100U
10V
R229
R206
100
1/4W
R207
100
R304
C212
330P
(12K)
+
GND
1K
1/4W
R203
GND
GND
GND
R201
(5.6K)
C209 C208
GND
R209
10K
L314
BEAD
R202
(1M)
(.01U)
(.01U MEF)
R205
10
1/4W
GND
(4.7K)
R211
(4.7K)
R305
4.7K
D306
D304
D305
4148
4148
GND
GND
GND
4148
GND
D301
D302
D303
4148
C348
(5.6k)
1/4W
4148
R204
470
C203
.01U
4148
GND
.0047U
GND
100
C207
PEN
ZD201
S-BRI
C307
0.01U
(+)
HZ5B1
GND GND
R322
33
1/4W
R301
75
1/4W
1%
L302
BEAD
1 2 1 1 1 0 98 7654 321
(MTV021)
CM46542
U302
R302
75
1/4W
1%
C301
.01U
R323
33
1/4W
Q301
GND
242322212019181716151413
FBLK
R208
1/4W
R303
1/4W
R
G
B
(+)
V350
1K
R306
12K
C304
3.3U
75
1%
50V
+
R310
100
GND
R234
100
C205
3300P
R313
GND
100
+
C210
GND
.01u
C211
100U
R324
33
1/4W
R307
2SC945
C302
.01U
Q302
+
10V
C305
3.3U
50V
R308
6.2K
D308
4148
+
C303
.01U
C306
3.3U
50V
470U
C327
.01U
R31475K
10
C313
100U
16V
R309
4.7K
C311
C325
.01U
R311
100
C326
.01U
16V
GND GND
R312
100
+
R319
100
1/4W
C310
0.1U
GND
C312
0.01U
C309
10U
16V
10
GND
+
15
1
5
GND
GND
CLP(+)
B
OSD
BLK IN
INPUT
(R)
VCC1
(R)
OSD IN
(R)
GND1
(R)
INPUT
(G)
INPUT
(SOG)
VCC1
(G)
OSD IN
(G)
GND1
(G)
INPUT
(B)
VCC1
(B)
OSD IN
(B)
GND1
(B)
ABL IN
NC
VCC(5V)
SOG Sep
OUT
C308
+
.01U
U301
M52743
Q303
2SA733
VCC2
OUTPUT
(R)
EXTFeed
Back(R)
GND2
OUTPUT
(G)
EXTFeed
Back(G)
MAIN
Brig.
OUTPUT
(B)
EXTFeed
Back(B)
Retrace
BLK IN
D/A
OUT1
D/A
OUT2
D/A
OUT3
D/A
OUT4
GND
(5V)
SDA
SCL
CLAMP
P-IN
GND
36
R-OUT
G-OUT
30
B-OUT
R-O
G-O
B-O
S.C
22
1918
R336
470
1/4W
R356
470
1/4W
(R)
L312
BEAD
GND
GND
C317
10U
25V
GND
GND
NP
1/4W
GND
R318
R376
1/4W
1K
R315
470
(R)
L301
100UH
1/4W100
C315
470U
16V
GND
D307
4148
+
C263
.1U
100V
MEF
R335
R355
R375
GND
LC303
FILTER
30
30
30
C322
.01U
R320
100
GND
GND
C320
C321
22U
100V
R316
10K
R317
1K
GND
U303
GND
LM2412
VCC
VCC
10
+
C264
10U
100V
GND
GND
Vin_1
11
R
Vin_2
9
B
TA9A
Vin_3
8
G
Vbias
6
GND
FR104D358
L311
BEAD
+
R321
C323
1M
100U
GND
16V
GND
R371
1K
1/4W
LM2412
C262
0.01U
100V
MEF
C371
0.01U
Vout_1
R
1
Vout_2
B
Vout_3
5
G
GND
4,32,
7
R373
GND
24K
Q371
BF420
GND
R372
3.3K
GND
(FUSE)
(FUSE)
GND
R338
43
1/4W
R358
68
1/4W
R378
75
1/4W
(FUSE)
R374
1/4W
C332
1U
100V
NP
L330
0.22UH
L350
0.22UH
L370
0.22UH
GND GND
D353
L371
1M
BEAD
D372
1SS82
BF421
GND
C352
1U
100V
NP
D351
1SS82
Q3722SA733
C314
0.01U
+
C316
0.1U
SG3
200V
1M
L252
C253
BEAD
.01U
GND
SG4
200V
GND
GND
L351
BEAD
D352
1SS82
Q352
BF421
GND
GND
G1
G2
SG5
1.5KV
SG1
300V
R
B
G
SOCK1
D252
C252
470P
IKV
GND
GND
D251
C254
FR104
1000P
1KV
GND
GND
8
11
6
9
10
5
7
GND1
L253
L254
BEAD
BEAD
C255
.01U
2KV
GND
R333
C331
0.01U
GND
R331
1K
1/4W
24K
Q331
BF420
GND
R332
3.3K
R334
1M
1/4W
GND
C256
1000P
1KV
R252
10K
1/2WS
GND
GND
L331
BEAD
D332
1SS82
Q332
BF421
H.V
G4-2
G4-1
G2
<FBT>
<FBT>
<FBT>
<FBT>
No. 0501 CRT BOARD
Page 32
GREEN
V-MODE
AMBER
5V
MUTE
SW3
POWER ON/OFF
R65
1.3K
1%
GND
R80
4.7K
8.4V
R72
XX
SW2
FUN+
SW3
FUN-
SW4
ADJ+
SW5
ADJ-
GND
R10
470
SW1
5.6K
10K
2SC945
Q3
XX
R7
1%
R71
1%
Q1
HZ7A1
D3
XX
JP1
ZD1
R4
5.1K
1%
2.7K
R6
KEY-IN
R5
1%
GND
2
1
LED1
LED2
GND
1%3.6K
C7
.01U
1N4148
8.4V
R63
2.7K
D2
1N4148
R11
1K
1/4W
GND GND
+
C70
XX
GND
58K-66K
L
LLL
H
H
C13
47U
25V
4.7U
4.7UC29+4.7UC30
+
C15
R60
10K
2SC945
52.1K-58K40.1K-52K
H
76K-89K66K-76K
L
HHHHH
4.7U
C18
R58
10K
O
4.7UC21+4.7UC20+4.7U
+
H
12V
+
C14
220U
16V
4.7U
4.7UC24
+
+
C19
C23
GND
R57
10K
LLL L
D5
XX
U4
7812
I
+
G
GND
4.7U
4.7U
+
+
+
C16
C17
R59
4.7K
1/4W
Q4
GND
H
H
H
HHHH
+
C26
1000P
H-PHASE
PARALLEL
H-SYNC
V-SYNC
89K-
H
H
H
L
H
H-SIZE
V-SIZE
V-CENT
PIN
TRAP
TILT
H-MORIEH-MORIE
CONNER
BALANCE
V-MORIE
36.1K-40K31K-33K 33.1K-36K
R50
4.7K
4.7K
C11
2200P
GND
R16 100 1/4W
R15
L8
BEAD
BEADL7
BEADL5
BEADL6
C37
220P
SW1
SW2
SW3
SW4
SW5
5V
D15
1N4148
D17
1N4148
GND
100
5V
DDC-SCL
DDC-SDA
V-SYNC
H-SYNC
GND GND
1/4W
GND
R17 8.2K
R68 10K
R69 10K
DDC-SCL
DDC-SDA
P5
1
2
3
4
5
C38
220P
DEG.DEG.
L
L
L
R20 100 1/4W
R21 100 1/4W
R22 10K 1/4W
R23 10K 1/4W
R24 10K 1/4W
R25 100 1/4W
R26 10K 1/4W
R28 10K 1/4W
R29 10K 1/4W
10K 1/4WR27
R31 10K 1/4W
R62
1K
1/4W
2SC945
D4
XX
P2
R8
10K
1
1%
2
3
4
R1
4.7K
+
C4
10U
R38
R37
R39
16V
GND
10K
10K
10K
R36
10K
R40
10K
+
220U
10V
GND GNDGND
R35
10K
C8
.01U
C3
10KX8
5V
RA1
+
C2
2200U
10V
GND GND
U3
7805
OGI
1/4W
10K
R43
7.5V
C1
.01U
1/4WR47
1/4WR70
1/4W
R45
1/4WR48
10K
10K
R49
10K
2.2K
5V
D14
1N4148
D16
1N4148
GND
C39
100P
GND
GND
P3
1
2
3
4
5
GND
DDC-SCL
DDC-SDA
R13
100
3
40
VSYNC
VSYNCI
HSYNC
39
HSYNCI
HSYNCO
VSYNCO
VCENT
38
DAC3
PIN.
37
DAC4
TRAP.
36
DAC5
TILT.
35
DAC6
34
DAC7
H-OUT
(POSITIVE)
33
V-OUT
(NEGATIVE)
32
CORNER.
31
DAC13
PARA.
30
DAC12
BALA.
29
DAC11
V-MORIE
28
DAC10
BRI. BRI
27
DAC9
26
DAC8
25
24
SW4
23
R14
100
54
P20
P21
C40
100P
2219
2120
5V
7.5VS
SW5
SW2
GND
1N4148
1N4148
C41
100P
BEAD
R100
3.3
2W
L30
5V5V
D8
D6
GND GND
V350
G1
GND
H-BLK
L31
BEAD
6.3V
12V
ABL
82V
C31
.01U
100V
1N4148
1N4148
D9
1N4148
D7
1N4148
GND
D10
D11
5V
5V
D13
1N4148
D12
1N4148
C36
C45
.1U
100P
GND
P1
1
2
V-OUT
3
EEP-SDA
4
EEP-SCL
5
CLAMP
6
7
8
9
GND
GND
C32
.01U
GND
1
V-SIZE
DAC2
H-PHASE
XXR73
R64
1M
33PC5
GND
D1
C42
XX
Q2
2SC945
HSIZE
RESET
33PC6
8MHzY1
KEY-IN
FAT.
SW3
PS1
PS2
SW1
ZD2
HZ5C1
100U
M
C9
10V
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
GND
+
C10
.01U
U1
DAC1
DAC0
RESET
VDD
GND
OSCO
OSCI
P15
P14
P13
P12
AD1/P11
AD0/P10
INTE/P16
P27
P26
P25
P24
UM6861
P23 P22
876
U2
24C08
2
1
GND
HL
L
LL
HL
1/4W10KR30
Q5
GND
R61
10K
L
H
H
HH
16VS
+
C25 4.7U
C27
470P
No. 0501 DEF, POWER & SWITCH BOARD 1
Page 33
H-SIZE
12V
B-DRIVE
H-DRIVE
15VS
H-MORIE
V-MORIE
U601-P9
HFLB
V-OUT
H-OUT
Q814-E
X-RAY
V350
V-MODE
PIN
TRAP
12V
CORNER
R456
6.8K
P730
X-RAY
CLAMP
V-CENT
V-SIZE
2SC945
BLANCE
PARALLEL
H-PHASE
Q404
R402
R730
5.11K
R424
1/4W
GND
R455
2.2K
GND
1
1%
47K
Q401
RN1203
R405
470K
+
C446
GND
100
1/4W
2
1/4W
R459
1/4W
2SC945
Q405
R447
470K
1/4W
470U
16V
R731
4.3K
1%
22K
R477
R441
150K
GND
R454
56K
1/4W
AN5767K
GND
R478
R476
1K
1K
R416 100
D420
1N4148
R732
7.15K
1%
GND
2SC945
Q406
U402
987654321
R457
5V
10K
ZD730
HZ12C1
GND
220K
R426
1/4W
GND
GND
C730
GND
47K
10
W25
220K
Q432
2SC945
10U
Q428
XX
2SC945
R466
680K
1/4W
GND
Q407
131211
GND
R463
22K
R462
33K
GND
GND
C404
470P
GND
+
R733
1K
GNDGND
R423 39K 1/4W
R401
240K
12V
1/4W
C455
XX
R427
68K
1/4W
2SC945
Q408
R403
1/4W
R410
C406
10U
25V NP
Q732
2SA733
62K
33K
R411
R734
2.2K
Q731
2SC945
GND
R400
51K
2SC945
Q409
R408
150K
1/4W
R489
1/4W
2.2
(FUSE)
C424
R601
10K
100
1/4W
1/4W
C433
470P
C444
100P
GND
16 15 14 13 12 11 10 9 8 7 6 5 4 3
MEF.1UC422
R428
22K
1%
GND
2SC945
Q410
GND
.1U
MEF
2SC945
Q411
R444
330K
1/4W
D405
1N4148
Q417
2SC945
Q416
2SA733
GND
R603
100 1/4W
100PC443
GND
.1U
C412
.0022U
R434
150K 1/4W
R440
270K
R417
1/4W
MEF
C413
PPN
2SC945
R418
1.2K
1/4W
+
C408
470U
16V
U401
TDA4858
Q412
10
(FUSE)
D404
1N4148
ZD404
HZ5C1
GND
R429
R432
C414
.22U
2SC945
Q413
R465
120K
1/4W
R419
3.3K
8.2K
750
MEF
D491
R491
240
1/4W
(FUSE)
Q420
R422
1.5K
1/4W
(FUSE)
FR104
D430
1N4148
D431
1N4148
GND
GND
R404
6.2K
1/4W
1%
R464
7.15K
1/4W
ZD491
HZ12C1
C437
100U
16V
1%
2SA733
Q424
C428
1500P
MEF
2%
C410
.01U
MEF
+
GND
2
32313029282726252423222120191817
GND
R449
47 1/4W
(FUSE)
R451
2.2K
1/4W
R430
GND
GND
10K
GND
C440
220P
470U
16V
2SC945
Q422
2SA733
C491
+
1%1.24K
MEF.01UC438
R437 620K
R420
C416
2SC945
Q438
R409
270K
GND
27K
MEF.01U
R407
13K
1/4W
MEF.012U
2.2M
R436 56K
R406
C417
C434
.0068U
MEF
NO NOTES ? W RESISTOR IS 1/8W
N0 NOTES ? V CAPACITOR IS 50V
100
R620
ZD442
HZ12C1
R482
4.7K
R481
C601
XX
R623
4.75K
1%
10K
R431
C415
.01U
PPN
1%
2SC945
Q414
D494
1N4148
+
GND
R621
100
C427
100U
16V
R442
4.7K
R487
R607
43V
XX
2W
1
R494
100
1/4W
+
2200U
25V
105C
GND
2.2K
1/4W
2SD667
GND
15V
C512
.1U
250V
MEF
C603
R443
Q442
FORM U401
PIN 26
U601
TDA8351
R604 1W1
C435
R468
C604
100U
63V
R605
33K
MEF.1U
250V
10K
U403
R471
LM358
18.2K
1
C432
.1U
Q430
2SC945
1%
R480
10K 1/4W
R472
9.09K
GND
1%
1/4W
+
C411
GND GND
22U
25V
GND
R453
10K
6
5
C448
.1U
MEF
R413
22.1K
1%
+
D421
1N4148
R473
1/4W
2.2K
(FUSE)
C470
180P
7
Q431
2SC2001
R474
1K
R469
130K
1/4W
FBP
MUTE
R475
GNDGND
5V
1K
H-BLK
C471
.1U
MEF
HFLB
R736
10K
VR405
20K
2
-
3
+
R461
36K
1/4W
R412
10K
1/4W
R452
100K
1/4W
987654321
R613
10
1/4W
+
GND
C605
D612
1N4148
1U
R610
12K
42V
D611
.1UC602
1N4148
+
C606
2.2U
GND
GND
15VS
V-DF
(FUSE)
R614
47
+
1/2W
R611
130
1/2W
R606
10K
1/4W
L611
100uH
R609
2.7K
1/4W
1
2
G1
V-OUT
P501
3
4
No. 0501 DEF, POWER & SWITCH BOARD 2
Page 34
SW5
15VS
SW4
SW1
SW2
SW3
210V
X-RAY
FBP
TILT
7.5VS
ABL
43V
H-DRIVE
MUTE
Q548
RN1203
R705
10K
GND
R580
2.2K
1/4W
C563
10U
R702
2.2K
1/4W
C812
.01U
MEF
GND
2SC945
GND
R579
2.2K
1/4W
R571
2.2K
1/4W
Q506
RN1203
GND
R817
Q703
R818
3.3K
1/4W
R701
2.2K
1/4W
C703
10U
25V
GND
R537
D508
1N4148
Q547
RN1203
R520
2.2K
1/4W
Q507
RN1203
GND
Q516
BF421
1/4W47K
100
GND
GND
D509
1N4148
(FUSE)1/2W
Q701
2SC945
+
Q702
2SA733
C501
47U
63V
105C
R578
"A"
D808
1N4148
GND
1K
2SC945
R538
+
C524
4.7U
250V
Q803
+
GND
1
2W
R703
2.2
1/4W
(FUSE)
GND
R521
2.2K
1/4W
Q508
RN1203
GND
L90
R506
220
1/4W
R550
22K
R549
2.2K
1/4W
Q510
RN1203
GND
R536
2.2K
1/4W
Q509
RN1203
GND
R502
.2
1W
FUSE
R539
100
1/2W
(FUSE)
R816
330
1/4W
C701
+
10U
25V
GND
P701
2
1
TO ROTATE COIL
L89
BEAD
L506
100UH
R503
2SD669
R507
220
1/2W
R551
330
1/4W
GND
C803
100U
250V
105C
R814
10
1/4W
(FUSE)
2W220
Q501
Q502
2SD669
C822
100U
16V
L504
GND
47U
Q512
10K
GND
BEAD
C505
.0024U
1.6KV
PPS
IRFS640A
"A"
R825
82K
1/4W
C506 2KV180P
P501
YOKE-H
1
C530
2
220P
3
1KV
4
Q505
IRF9634
SD
R517
10K 1/4W
D505
1SS82
R535
4.7
2W
C533
.01U
250V
MPP
D
G
Q526
2SK941
S
R565
100
GND
1/4W
R560
100
5V
R564
4.7K
1/4W
R807
47
D805
2W
HER103
MOF
C806 1KV330P
D806
UF4006
R852
SG801
150
1W
GND
NO NOTES ? W RESESTOR IS 1/8W
NO NOTES ? V CAPACITOR IS 50V
G
R841
C523
.047U
400V
PPN
XX
GND
B-DRIVE
D547
1N4148
D548
1N4148
D549
1N4148
D550
XX
R805
1/2W
D807
UF4006
C807
220P
1KV
C507
4700P
500V
56
MOF
P802
R802
10
1/4W
P803
R570
JW
R540
4.7K
1/2W
GND
SW1
R574
SW2
4.7K
SW3
Q524
SW4
RN1203
D814
1N4148
+
C817
50V22U
GND
GND
U403-P7
IRFS640A
S
GND
C515
.1U
400V
MPA
Q517
D802
UF5408G
R823
68
R803
10K
R826
680K
C532
.01U
HS801
G
D507
BYD73A
R530
100
D
S
GND
GND
D526
FR104
IRFS640A
D801
BYM36E
Q801
2SK1341
R801
0.2
2W
(R)
(R)2.2 2WR512
(R)2.2 2WR514
R531
10K
C834
.01U
Q514
Q504
2SC5440
HS501
R513
22
1/2W
GND
C520
D527
.27U
400V
FR104
MPA
D532
1N4148
D
G
2
G
R532
S
100
R533
C534
10K
.01U
T801
1
D502
Q515
5TUZ47C
.0024U
IRFS640A
D
S
GND
C508
1.6KV
R511
PPS
D519
FR104
C521
.47U
400V
MPP
100R528
2W
1
C529
.01U
C542
2200P
1KV
GND
+
C510
250V
GND
1.2U
250V
C519
MPP
D
G
S
GND
D528
1N4148
R529
GND
GND
R827
470
1/2W
14
12
7
44
5
8
9
10
+
C846
2.2U
GND
Q805
2SC945
R834
10K
+
+
+
C821
C820
4.7U
GND
22U
GND
GND
VR802
30K
C835
250V
.1U
MEF
ZZZ
4.7U
GND
R504
R542
5W120
C513
1200P
1KV
R522
470
1/2W
100
5W
R510
100
1/4W
L501
4503
C502
.22U
MEF
R508
560
1W
GND
R509
10K
1/4W
7.5VS
Q545
2SB647AC
.1U
GND
C539
C531
3300P
PPN
R546
39
2W
R541
100
DGQ503
2SK941
S
GND
Q546
2SA733
R545
4.7K
T501
G
D542
FR104
D
1N4148D541
D804
BYV36C
GND
C516
.01U
R544
10K
GND
C801
3300P
1.6KV
PPS
R811
R804
150
10K
1/4W
1/4W
GND
D823
1N4148
R812
12K
C511
C541
.1U
.12U
400V
250V
MPA
MPA
D803
31DF6
+
GND
+
GND
+
C829
22U
GND
GND
C809
47U
25V
+
5
76
R821
47K
Q952-C
1/4W
Q819
RN1203
GND
1N4148
D810
R806
220K
C823
100P
348
1
U801
3843
2200P
GND
C810
2
R815
470
1/4W
GND
R820
1K
1/2W
L509
BEAD
GND
C551
.01U
100V
FBP
T802
1
2.2
R862
2
(FUSE)
1/4W
L503
8mH
12x16
L508
BEAD
D506
BYV26C
GND
T506
C826
2200P
1KV
GND
PL
G
R575
100
GND
+
C818
2.2U
400V
+
C819
22U
250V
UF4006
D
S
Q525
RN1203
D813
Q519
2SK941
GND
R576
100
2SC2271
R577
4.7K
2SC945
GND
Q812
15VS
Q813
R833
33K
1/4W
R850
620K
1W
R824
220K
1/2W
D521
FR10-04
GND GND
R844
6.8K
R847
160
10K
GND
R861
240K
1/2W
1N4148
R848
9.1K
1/4W
R849
R515
1/4W
(FUSE)
R516
2.2
1/4W
(FUSE)
D809
R846
300K
D503
HER102
2.2
C555
D504
HER102
XX
C554
XX
R860
470K
1/2W
R845
27K
R843
+
VR501
C562
220U
5K
16V
R501
+
C561
220U
16V
C540
+
C827
2.2U
GND
+
C828
10U
25V
22K
Q522
2SD667
1K
XX
Q521
+
2SB647
R561
10
1W
L502
880uH
R566
33
2W
+
C522
4.7U
250V
GND
V-DF
HV
X-RAY
15VS
Q814
2SA733
+
C833
47U
GND
25V
R835
4.7K
R836
22K
VR803
Q810
BF421
R837
ZD801
470
HZ6B2
Q811
10K
RN1206
GND
C825
.1U
GND
GND
R838
180K
R839
150K
MUTE
BRI
G1
No. 0501 DEF, POWER & SWITCH BOARD 3
Page 35
SOCKET
1
2
3
P901
C977
.1U
SYNC+
SYNC-
L
N
GND5
GND5
C902 0.47U
L901
F901
T3.15A
250V
CHS GND
C991
HZ5C1
ZD990
GND5
R997
1/4W1K
1
22U
25V
C950
D945
ER306
R981
FE30-06
D943
UF5404G
C963
Y5P
1KV
C954
331
1KV
1W0.2
331
1KV
1W0.47
U904
TL431
D944
Y5P
D941
C955
Y5P
1W10
R953
10
1W
C961
D946
ER306
C971
331
1KV
Y5P
ER302D942
R954
ER202
R955
D923
ER202
R910
3K
0.22U
K
A
GND1
1/4W10
R940
R941
C945
R
FE30-06
1/4W10
1K
47
MEF
101
1KV
R980
GND1
D972
+
C946
220U
63VB
C943
1000U
25V
GND1
1/2W
R942
1/4W
1W10
L944
+
R944
R945
1/2W
1K
FS
22U
51K
51K
C973
103
500V
15V
DEGUESS
1000U
25V
GND1
GND1
R946
1K
1/4W
FS
VR901
500
GND1
+
C944
C941
+
1000U
16VB
R947
470
1/4W
C956
0.22U
250V
+
C947
100U
100V
FS
D951
4148
+
C949
100U
250V
GND1
L905
22U
C953
+
220U
63V
GND1
Q951
B772Q
R966
R963
470
GND1
D952
4148
R964
4.7K
+
C964
1OOU
25V
1/2W1K
Q941
B772Q
C940
+
470U
16VB
GND1
MEF
START-UP SEQUENCE
ON
PS2
0
1
11 1
1
11 1
1
L945
PS1
22U
R965
470
1/2W
C965
+
GND1
AMBER
**
00
0
L947
22U
470U
16V
RN1206
GND1
A
1
0
Q952
C945
C942
+
1OOU
16V
Q960
GND1
Q942
C945
GND1
R961
620
1/4W
G
00
0
202V
+
C974
47U
250V
GND1
+
C948
47U
100V
GND1
C987
.01U
500V
GND1
75V
C997
.01U
500V
GND1
42V
16VS
7812
O
I
G
U903
+
C959
47U
16V
GND1
GND1
10K
R967
L941
22U
R968
+
10K
C957
47U
16V
GND1
12V
C960
104Z
GND1
PS1
4148
D955
7.5VS
PS2
FOR HEATER
10.5v
R962
620
1/4W
P
GREEN
Q961
GREEN
YELLOW
RN1206
GND1
GND1
101
331
1KV
Y5P
47K
2W
C905
4700P
4700P
T902
C998
4
3
TLP721F
4700P
U900
12
11
10
13
16
17
18
15;14
C981
C900
472
1KV
C952
331
1KV
Y5P
331
R985
0.2
1W
GND1
R973
GND1
R972
GND1
1
2
L902
RT901
SCK055
RT902
SCK055
95W
1W330
87654321
GND5
C990
22U
25V
U906
C945
GND1
Q990
A733
1/4W
R992
Q991
GND5
R950
D950
4148
Q946
C945
4.7K
+
1N5406
1N5406
1N5406
1N5406
91
R991
4.7K
620K
1/2W
R926
68K
1/2W
R951
+
C996
47U
16V
620K
1/2W
R976
R977
GND5
D902
D901
D903
D904
10K
7MH
1
4
C904
3 2
472
4
20MH
32
1MR901
1/2W
P902
DEGUESS
RL901
OMI-SS-212DM
PR901
321
C983
222
R990
Q992
R993
3K
74LS221
391J
C993
1.5K
A733
4.7K
R994
1216 15 14 13 11 10 9
+
12.7K
MF
R996
C992
222G
PPN
R995
ZD991
HZ5C1
D991
4148
R999
4.7K
R998
C995
MEF223
3K
GND5
GND5
15V
DEGU
C969
4.7U
50V
R931
100K
Q914
Q901
+
R982
+
400VA
*
450VA
GND5
A733
ZD903
HZ5C1
C906
330U
R957
22K
0.21W
KSP44
C913
+
2.2U
50V
GND5
GND5
D930
4148
C917
104Z
R903
82K
(S)
D913
4148
D911
3W
D909
4148
A
R913
100K
C930
100U
10V
Q912
BT169
R975
1k
C909
GND5
4148
K
1OOU
+
25V
R927
1/2WS
R928
1/2WS
G
R922
22K
ZD901
18-1
+
1M
1M
C922
470P
R930
1/4W
0.2
1W
R943
Q903
C945
+
C924
47U
16V
GND5
R9091/4W
47
D916
4148
D921
R921
C923
1k
+
C921
220U
10V
C911
1OOU
25V
4148
GND5
C910
104Z
GND5
2.2U
50V
+
U9013842
R912
22K
GND5
C920
0.0033U
22
MEF
R916
47
GND5
+
GND5
FR10-04
2SK2761
HQ910
R920
D908
1367
2548
500V
GND5
Q902
R917
10K
1/4W
GND5
1/4W
R914
0.3
3W
D915
FR10-04
0.01U
C914
33K
C962
103
L903
BEAD
G
240
R911
R904
1W
D
S
FR10-10
GND5
R908
1/4W10
3k
D905
FR10-10
D906
R971
1/4W
1K
C925
500V
GND5
103
C907
103
500V
GND5
470P
C970
5
4
3
1
C908
R905
7
8
C980
4700P
GND5
No. 0501 DEF, POWER & SWITCH BOARD 4
Page 36
Hitachi, Ltd. Tokyo, Japan
International Sales Division
THE HITACHI ATAGO BUILDING,
No. 15 –12 Nishi Shinbashi, 2 – Chome,
Minato – Ku, Tokyo 105-8430, Japan.
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