Hitachi CM721FET Service Manual Download Page 27

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1/4W

270

R911A

D908

FR104

221Y1

C932

1/2W

R928

GND5

R953

102

C995

GND5

500V

103

C925

D905

FR107

2SK2761

Q902

1/4W

750

R998

1/2W

820K

R901

332Y

C904

82K

R903

1/4W

240

R989

B772Q

Q941

Q946

C945

GND5

4.7K

R964

500V

103

C935

GND1

25V

100U

C909

22U

L905

1/4W

10F

R908

GND5

63V

220U

C953

22U

L945

391K

C993

GND1

220U

10V

C921

jumper

R986

HZ5C1

ZD990

25V

22U

C991

P902

DEGUESS

250V

T3.15A

F901

C945

Q942

C945

Q952

jumper

R984

jumper

R983

C945

Q903

4148

D916

GND5

10V

100U

C930

A733

Q914

0.47X2

C901

1/4W

R930

104Z

C977

4.7K

R994

R981

R909

1/4W

GND5

1KV

331

C952

HTL145

Q901

1/2W

470

R965

(R)

ER306

D972

GND1

0.47X

C902

PPN

222G

C992

(R)

0.2F

R973

1W(R)

0.2F

R982

GND5

1/4W

10K

R967

500

VR901

PR901

FR104

D915

GND1

1/4W

620

R961

R993

BT169

Q912

22U

L941

GND5

15K

R912A

1/2W

51K

R944

50V

2.2U

C923

LA54B D923

15K

R913A

1W(R)

0.2F

R943

GND1

16V

1000U

C941

GND1

500V

103

C962

(R)

0.2F

R985

500V

103

C973

GND1

1/4W

R971

GND1

12.7K

R996

ER202

D923

GND1

1/4W

R954

GND1

0.47F

R972

1/4W

10K

R951

100V

100U

C947

GND5

D955

4148

250V

100U

C949

1000U

25V

C943

MOF

1WS

620K

R977

472Y

C983

MOF

1WS

620K

R976

MEF

250V

224J

C956

B772Q

Q951

HZ5C1

ZD991

33K

R904

R988

(R)

ER306

D944

330

R990

91K

R926

50V

4.7U

C969

472Y

C900

GND5

ER202

D941

GND1

2.2U

C913

GND1

16V

470U

C940

1/4W

240

R920

471K

C922

GND5

16VA

47U

C957

GND1

GND5

OMI-SS-212DM

RL901

GND5

332Y

C903

GND1

4148

D909

47K

R905

D957

104Z

C917

D954

GND5

500V

103

C907

GND1

D906

FR107

100K

R913

471K

C970

1/4W

620

R962

GND5

104Z

C960

100K

R931

1/2W

R966

22mH

L901

GND5

C998

GND1

22K

R957

16V

47U

C924

4148

D913

GND5

(R)

ER306

D946

GND5

Y5P

1KV

331

C908

4148

D950

1KV

331

C954

1KV

331

C955

L903

BEAD

GND1

25V

100U

C964

1/4W

1KF

R942

U904

TL431

T902

Q960

RN1206

4148

D911

1/4W

10K

R917

ZD902

4.7K

R991

D930

4148

100UH

L904

1.5K

R995

A952L

Q990

16V

47U

C959

U901

3842

ER302

D942

1KV

331

C963

472Y

C981

P901

SOCKET

1/4W

4.7K

R992

102Y2

C93A

GND5

GND1

104Z

C910

GND5

C945

Q991

25V

22U

C990

4.7K

R999

103

C914

MEF

332

C920

GBU4J

DB901

GND5

102Y2

C931

GND1

180K

R960

25VA

1OOU

C911

GND1

R916

GND5

0.3

3W(R)

R914

4148

D921

GND5

1/2W

R927

472Y

C905

D952

4148

22U

L947

R980

R910

GND1

MEF

0.22U

C945

470

R963

1KV

331

C971

(R)

UF5406G

D943

1/4W

R955

63V

220U

C946

GND1

100V

47U

C948

1KV

101

C950

GND1

1KV

101

C961

22U

L944

25V

1000U

C944

GND1

10K

R968

25V

100U

C942

16V

470U

C965

D991

4148

GND1

D951

4148

472Y

C980

4148

D959

1/4W

R946

25V

47U

C996

450VA

100U

C906

D945

(R)

ER306

HZ18-1

ZD901

22K

R912

74LS221

U906

1/2W

51K

1KF

R945

R941

R911

1/2W

R950

R940

Q961
RN1206

1/4W

470F

R947

100UH

L902

R921

22K

R922

U900

LTV-817MB

15SP008

RT901

Q992

A733

GND5

D956

500V

103M

C997

T901A

500V

103M

C974

250V

47U

C987

FR104

D980

1/2W

R987

630V

MPP

0.68U

C901A

222

C982

1/4W

R979

D912

R975

HZ5C1

ZD903

25V

100U

C975

GND5

HZ15-2

ZD90A

25V

100U

C902A

GND5

1/4W

15K

R905A

GND5

NPO

221J

C906A

BEAD

L906

1/4W

R903A

1/4W

47K

R908A

MF 1/2W

R907A

1/2W

R906A

10K

R904A

102K

C903A

684J

C904A

4148

D903A

3W(R)

0.75

R902A

3W(R)

0.75

R901A

jumper

L907

FS14KM-10

Q901A

MC33260

U991A

ER306

D901A

1KV

101

C933

GND5

DEGU

GREEN

AMBER

Title

HITACHI (EUROPE) LTD.

16V

10.5V

16VS

X61A49-01

FOR X62A49-01

SCHEMATIC, POWER, VA-916

SYNC

HQ902

DG100012800

7812

U903

7.5V

GREEN

YELLOW

76V

44V

DG100015000

4N35

U980

FOR HEATER

PS2

7.5VS

PS1

12V

202V

15;14

N0 NOTES ? V CAPACITOR IS 50V

NO NOTES ? W RESISTOR IS 1/8W

Sheet 1 of 1

Summary of Contents for CM721FET

Page 1: ...Service Ingenieur die Sicherheitshinweise und Hinweise zur Produktsicherheit in diesem Wartungshandbuch zu lesen SERVICE MANUAL MANUEL D ENTRETIEN WARTUNGSHANDBUCH Data contained within this Service manual is subject to alteration for improvement Les données fournies dans le présent manuel d entretien peuvent faire l objet de modifications en vue de perfectionner le produit Die in diesem Wartungsh...

Page 2: ...e 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 compatibilit...

Page 3: ...n 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 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...

Page 4: ...ass 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 ...

Page 5: ...NT 7 2 CONTROLS AND CONNECTORS LAYOUT 10 A MAIN PCB 10 B CRT B 11 C PIN ASSIGNMENT 11 3 CIRCUIT DESCRIPTION 12 A POWER SUPPLY 12 B POWER SUPPLY BLOCK DIAGRAM 12 C POWER SUPPLY CIRCUIT 13 D TDA4855 4858 AUTOSYSNC DEFLECTION CONTROLLER 14 FIGURE 4 5 14 E HORIZONTAL PROCESSOR 16 F VERTICAL PRE AMP 16 G HORIZONTAL DRIVE 17 4 TROUBLESHOOTING 18 A MONITOR CHECK FLOW CHART 19 APPENDIX A SCHEMATIC DIAGRAM...

Page 6: ...e properly adjusted at 15 F L with full intensity reverse pattern then switch to cross hatch pattern and place unit facing east Pincushion should be less than 2 0mm Barrel should be less than 2 0mm top bottom 1 5 left side right side Trapezoid should be less than 3 5mm Parallelogram should be less than 3 5mmTilt should be less than 1 2 degree E Alignment Procedure E 1 Brightness Adjust 1 Adjust th...

Page 7: ... 3 with full white pattern adjust OSD ABL SUB BRIGHTNESS to get full white light output 30 2 FL G Focus Adjustment G 1 Adjust brightness have the brightness of raster be 0 06FL and contraset be 30FL 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 H Convergence Adjustment Input R B and R G signals make sure convergence ...

Page 8: ...rted all output voltage should be shut down and unlatch 3 when normal condition is recovered 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...

Page 9: ... 70 09 31 78 14 27 25 422 12 711 1 907 1 112 3 813 0 064 0 636 0 381 4 VESA60 800 600 40 P P 37 88 60 32 26 4 16 58 20 15 84 2 2 0 607 3 2 0 106 1 0 025 5 VESA85 800 600 56 25 P P 53 674 85 061 18 631 11 756 14 222 11 179 2 702 0 503 1 138 0 056 0 569 0 019 6 VESA60 1024 768 65 N N 48 36 60 20 68 16 67 15 754 15 88 2 462 0 6 2 092 0 124 0 369 0 063 7 VESA75 1024 768 78 75 P P 60 023 75 029 16 66 1...

Page 10: ... 9 ...

Page 11: ... 10 2 CONTROLS AND CONNECTORS LAYOUT A Main PCB ...

Page 12: ...H CENTRE VR P701 TILT 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 76V G IN 7 12V GND 8 CONTRAST ...

Page 13: ... power supply is a universal switching mode power supply It consists of an off line flyback converter and a Boost converter The output voltage and current rating are 7 5V 0 81A 15 3V 0 84A 44V 0 2A 76V 0 2A and B 202V 0 4A B Power Supply Block Diagram ...

Page 14: ...Q902 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 C 3 SYNCHRONIZED CIRCUIT The oscillator frequency is defined by R912 C920 The equation is approximately Fosc 1 8 R912 C920 The external signal that comes from horizontal circuit synchronises the working frequency of power circuit Via U...

Page 15: ...er circuit The feedback points of U991A is not only connected to C906 but also the AC line in voltage of C901A which the voltage waveform shape is same as the line in voltage The follower booster circuit can smooth the input current to improve PF value D TDA4855 4858 AUTOSYSNC DEFLECTION CONTROLLER Figure 4 5 ...

Page 16: ...utput VPOS 17 V shift input VAMP 18 V size input VSCOR 19 vertical S correction input EWTRP 20 Ew trapezium correction input EWPAR 21 Ew parabola amplitude input VAGC 22 external capacitor for V amplitude control VREF 23 external resistor for vertical oscillator VCAP 24 external capacitor for vertical oscillator GNDS 25 ground signal ground HPLL1 26 external filter for PLL 1 HBUF 27 buffered f v v...

Page 17: ...he free run frequency is setting by R428 and C412 fvo 1 10 8 x R428 x C412 C445 the V position is controlled by the D C pin 17 and V size is controlled by D C pin 18 and the pin 19 is to ADJ VERT linearity F 1 VERT output circuit U601 TDA 8351 see Figure 6 The saw tooth is output from U401 pin 12 13 to the pins 1 and 2 of TDA8351 vert output amplifier and then output from pin 7 to the vert DY for ...

Page 18: ...FBT and input to U801 PWM modulator IC to drive Q801 When Q801 turns on the energy is stored in the FBT When Q801 turns off the resonate circuit creates a pulse to the FBT to generate a HV 25KV 26KV and G5 voltage 6 1 7 8KV and G1 voltage 180V and 32V for X RAY protection and 300V for dynamic focus H Video Amp Circuit H 1 Video PRE AMP U301 M52743 is the Video PRE AMP The input signal is 0 7Vp p t...

Page 19: ...en R932 R963 DB901 DB904 Is Check and repair Q903 U903 Q903 VDS No D982 M907 M911 D912 Waveform normal Is 7 5V No Check Q902 D926 C937 In spec U904 U908 VR901 Q909 Is B voltage No Check Q902 Q921 D924 U902A Correct Q909 202V Ready is Combine with Monitor check operation frequency OK Stop ...

Page 20: ... 19 A Monitor Check Flow Chart A 1 No raster ...

Page 21: ... 20 A 2 No Picture ...

Page 22: ... 21 A 3 No vertical deflection raster become a horizontal line ...

Page 23: ... 22 APPENDIX A SCHEMATIC DIAGRAMS PCB ASSEMBLIES ...

Page 24: ...L30 BEAD 8MHz Y1 GND SW1 R1 4 7K R13 100 SW5 10V 100U C9 SW4 SW3 SW2 GND 100P C40 O G I 7805 U3 R4 1 5 1K 5 4 3 2 1 P3 R69 10K R8 1 10K 4 7K R80 4 3 2 1 P2 2SC945 Q1 2W 3 3 R100 C25 4 7U R68 10K R14 100 4 7U C29 4 7U C30 4 7U C21 4 7U C20 4 7U C19 5 6k R35 220P C37 GND GND 4 7U C24 BEAD L8 BEAD L7 XX R73 BEAD L5 BEAD L6 1N4148 D8 1N4148 D6 GND GND 1N4148 D7 1N4148 D9 GND 1N4148 D11 1N4148 D10 1N41...

Page 25: ...W 10K 100P C443 C406 25V NP 10U GND GND 56K 1 4W R454 HZ5C1 ZD404 2 1500P MEF C428 22K 1 4W R459 Q442 2SD667 C427 16V 100U R732 1 7 32K GND R437 620K R420 27K GND R407 1 4W 13K C604 63V 100U 470P C433 GND MEF 01U C416 R406 2 2M R471 1 18 2K R409 270K 1N4148 D430 R466 1 4W 680K MEF 012U C417 20K VR405 R444 330K 1 4W 100 R621 R418 1 2K 1 4W GND GND R442 4 7K R434 150K 1 4W R494 1 4W 100 R440 270K 2S...

Page 26: ...1 4W GND D802 UF5408G 1 4W 2 2K R520 GND GND 1 2W 220 R522 GND R561 10 1W GND XX C821 P803 L509 BEAD 1 4W 10 R802 330 1 4W R816 MPA 400V 27U C520 2200P C810 R839 150K R814 FUSE 1 4W 10 C833 25V 47U 10K 1 4W R509 RN1203 Q508 GND PPN 3300P C531 R861 1 2W 240K 100 R530 XX C554 XX C555 R535 2W 4 7 GND GND 4 7K R545 GND 1N4148 D528 1SS82 D505 GND RN1203 Q525 GND GND RN1203 Q510 1 4W 2 2K R549 100 R541 ...

Page 27: ...964 1 4W 1KF R942 A K R U904 TL431 T902 Q960 RN1206 4148 D911 1 4W 10K R917 ZD902 4 7K R991 D930 4148 100UH L904 1 5K R995 A952L Q990 16V 47U C959 2 5 4 8 1 3 6 7 U901 3842 ER302 D942 1KV 331 C963 472Y C981 3 2 1 P901 SOCKET 1 4W 4 7K R992 102Y2 C93A GND5 GND1 GND1 GND1 104Z C910 GND5 C945 Q991 25V 22U C990 4 7K R999 103 C914 MEF 332 C920 GBU4J DB901 GND5 102Y2 C931 GND1 1W 180K R960 25VA 1OOU C91...

Page 28: ......

Page 29: ......

Page 30: ......

Page 31: ...THE UPDATED PARTS LIST FOR THIS MODEL IS AVAILABLE ON ESTA ...

Page 32: ... 50 APPENDIX C DISPLAY UNIT ASSEMBLY ...

Page 33: ......

Page 34: ...31 1 008 LOCKING CABLE TIE 142MM 009 CUSHION 2 H76748 010 RUBBER WASHER F56146 T 4 0MM SHORE 50 011 SCREW M4X0 7 8CF MC EX LOCK WASHER 012 TAPPING SCREW TPB 4 20N MC 013 SCREW TPP 3 10C MC 016 POWER LED LENS V99941 017 LOCKING CABLE TIE W2 5XL203 WHITE YJ 203S 018 COPPER PAPER CRT H99944 020 SCREW TPB 5 24P MC 025 SCREW TPP 3 6C MC M01 SCREW M4X0 7 8C MC M02 SCREW M4X0 7 8P MC ADD WASHER M03 SCREW...

Page 35: ... 53 APPENDIX D CRT YOKE ASSEMBLY CRT YOKE Assembly 001 CRT YOKE M46QCK761X123 SAM AC500025600 002 H CON SET H999 CRT GND AROUND W5 6 DC020133320 ...

Page 36: ......

Page 37: ... ITALY Tel 39 02 487861 Tel 39 02 38073415 Servizio Clienti Fax 39 02 48786381 2 Email customerservice italy hitachi eu com HITACHI Europe AB Box 77 S 164 94 Kista SWEDEN Tel 46 0 8 562 711 00 Fax 46 0 8 562 711 13 Email csgswe hitachi eu com HITACHI EUROPE S A S Lyon Office B P 45 69671 BRON CEDEX FRANCE Tel 04 72 14 29 70 Fax 04 72 14 29 99 Email france consommateur hitachi eu com HITACHI EUROPE...

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Hitachi CM721FET, Service Manual

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