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Tatung VM5ERDA, Service Manual

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Tatung VM5ERDA Service Manual Download Page 35

 

 

35 

9.    BLOCK DIAGRAM (DEFLECTION) 

 

TDA9302H

 8M/12M

CPU CRYSTAL

UM68P61A/

LM1279AN

WT62P1

TDA9111

LM2438 O/P

IC802

Q404,Q405,Q406

Q909,Q910

Q907,Q908

IC401

LED CONTROL

IC801

Q403,T402(FBT)

Q402,T401

Q601,Q707

IC601

EHT

VERT.&HOR.OSC

HOR.O/P

G1

G2

FOCUS

PRE.AMP.

HOR. DRIVER

X-RAY PROTECTION

PINCUSHION &

VERT.O/P

CONTROL

25KV

FUNCTION KEY

H

V

BLANKING CIRCUIT

H-SIZE CONTROL

SAVING

POWER

HV

IC101

UP/DOWN

CRT

B

G

R

B

G

R

CABLE

SIGNAL

 

Summary of Contents for VM5ERDA

Page 1: ...SERVICE MANUAL COLOR MONITOR VM5ERDA D556T...

Page 2: ...BLE SHOOTING CHART 12 6 1 NO RASTER CRT RELATIVE CIRCUIT PROBLEMS 12 13 6 2 ABNORMAL DISPLAY 14 6 3 NO BLANKING 15 6 4 HOR OSC DEF HV CIRCUIT FAULT 15 6 5 ABNORMAL HORIZONTAL DEFLECTION 16 6 6 ABNORMA...

Page 3: ...l TTL Level TTL Level TTL Level Negative Negative Negative Positive Negative Vert Sync TTL Level TTL Level TTL Level TTL Level TTL Level Positive Negative Negative Positive Negative 6 Resolution Horiz...

Page 4: ...ross 16 Dimensions Monitor Carton 460 W X 425 H X 494 D mm Monitor 360 W X 364 H X 385 D mm 17 External Connection 15 Pin D type Connector AC Power Cord 18 Speaker for 5EA 5EnA 5ElrA only Rate power 1...

Page 5: ...r volt or with more sensitivity in the following manner Connect a 1500 ohms 10 Watt resistor paralleled by a 0 15UF AC type capacitor between a known good earth ground water pipe conduit etc and the e...

Page 6: ...ply It is important to maintain specified values of all components in the horizontal and high voltage circuits and anywhere else in the monitor that could cause a rise in high voltage or operating sup...

Page 7: ...on the connector to ensure firm grounding The connector information is as follow 15 Pin Color Display Signal Cable PIN NO DESCRIPTION PIN NO DESCRIPTION 1 RED 9 NC 2 GREEN 10 GND 3 BLUE 11 SYNC GND 4...

Page 8: ...l light up for a while then extinguish C Then you can select one of the eight functions including Contrast Brightness H SIZE H CENTER V SIZE V CENTER Pincushion and Trapezoid Simply press the function...

Page 9: ...ion but at the same time to obtain the same angle between the two tabs which should be approximately 180 D Check the complete blue and complete green patterns to observe their respective color purity...

Page 10: ...3 VIDEO CIRCUIT IC801 is a video amplifier clamping signal input from pin No 11 to restore the DC voltage of video signal the signal output from IC801 pass through IC802 Video package amplifier stage...

Page 11: ...7 Q908 Use for Off Mode to Cut off 6 3V Supply Voltage Q909 Q910 Use for Standy By or Suspend Mode to Cut off 15V Supply Voltage Q912 Q920 Push Pull Topology to Drive Q911 Q401 Turn on at Power ON OFF...

Page 12: ...E OF CRT HEATER ABOUT 6 3V CHECK VOLTAGE OF THE CRT CHECK BRIGHTNESS CIRCUIT CHECK POWER SAVING CIRCUIT ABNORMAL DISPLAY CHECK FBT D706 R723 C713 Q703 Q704 Q705 RELATIVE CKT REFER ITEM 6 2 CATHODE ABO...

Page 13: ...VIDEO OUTPUT OF IC801 R G B APPROACH STANDARD CHECK SIGNAL CABLE OR INTERFACE CARD CHECK THE RELATIVE CIRCUIT CHECK IC801 PIN 11 ABOUT 10Vpp PIN 13 15 18 ABOUT 3Vpp PIN 2 16 ABOUT 8V CHECK 8V RELATIVE...

Page 14: ...ECK THE VOLTAGE OF CRT CATHODE ABOUT 40Vpp CHECK THE VOLTAGE OF FBT SCREEN ABOUT 400 TO 600V CHECK THE RELATIVE CIRCUIT CHECK THE 12V PIN OF SMPS ON MAIN PCB RELATIVE CIRCUIT OF P802 CONNECTOR OF IC80...

Page 15: ...T FAULT 1 NO RASTER DISCONNECT WITH SIGNAL CABLE NG OK OK OK NG NG NG CHECK THE COLLECTOR VOLTAGE CHECK THE COLLECTOR VOLTAGE RELATIVE CIRCUIT RELATIVE CIRCUIT OF Q402 ABOUT 30Vpp CHECK Q402 T401 CHEC...

Page 16: ...TAGE ABOUT OF Q404 Q405 Q406 CHECK THE HV OF CRT ABOUT 24 5KV READJUST H SIZE FUNCTION 88V AT FH 31KHz 2 ABNORMAL HORIZONTAL RASTER CENTER CHECK D418 D419 R457 R458 L404 3 ABNORMAL HORIZONTAL VIDEO CE...

Page 17: ...E READJUST V SIZE FUNCTION VALUE CHECK VERT OSC CIRCUIT RELATIVE CIRCUIT CHECK THE VOLTAGE OF IC101 NG RELATIVE CIRCUIT CHECK THE IC601 ABOUT 11 8V PIN 6 CHECK D601 C606 RELATIVE CIRCUIT CHECK IC401 P...

Page 18: ...READJUST FOCUS CONTROL NG CHECK FOCUS CONTROL UNIT FOCUS LEAD WIRE CRT SOCKET CRT 6 9 NO SOUND FOR 5EA 5ElrA ONLY OK OK OK OK NG ENSURE THE SOUND SOURCE IS POWER ON ENSURE THE SOURCE CABLE CONNECTION...

Page 19: ...E OUTPUT NG OK NG OK OK NG NG NG OK OK OK NG OK NG YES NO CHECK BRIDGE RECTIFIED CIRCUIT 6 3V CIRCUIT CHECK START C K T IT SHALL BE 11 5V R923 R924 CHECK IC401 H OSC SEE ITEM 1 CHECK D919 CHECK Q911 Q...

Page 20: ...20 7 MECHANICAL OF CABINET FRONT DIS ASSEMBLY...

Page 21: ...81 26 704 SHIPPING LABEL 40A 2031 615 5A ID LABEL 41A 68 508 A CARD 41A 68 563 WARRANTY CARD 41A 68 576 WARRANTY CARD 41A 553 615 1A OWNER S MANUAL 44A 3121 510 PU FOAM 44A 3191 615 6A CARTON 44A 6547...

Page 22: ...50 5PS 15 CRT ASS Y 750A 5910 550 AGS 15 CPT CRT ASS Y GND2 95A 205 30 102 WIRE ASS Y LED1 81A 10 2 SA POWER LED SW101 77A 602 1 HJ TSVB 3B TACT SWITCH SW102 77A 602 1 HJ TSVB 3B TACT SWITCH SW103 77A...

Page 23: ...LED4 81A 2 3 2B LED GREEN BL B2441J LED5 81A 2 3 2B LED GREEN BL B2441J LED6 81A 2 3 2B LED GREEN BL B2441J LED7 81A 2 3 2B LED GREEN BL B2441J LED8 81A 2 3 2B LED GREEN BL B2441J LED9 81A 2 3 2B LED...

Page 24: ...Y5V 50V C407 65A 444 101 5T 100 PF 10 50V Y5P C408 65A 444 101 5T 100 PF 10 50V Y5P C412 65A 442 221 1T 220PF 5 50V C413 65A 450 104 7T 0 1uF 80 20 Y5V 50V C415 64A 44J 102 1AT 1000PF 100V C417 64A 17...

Page 25: ...50V C946 63A 212J 104 2AT 0 1uF 5 250V C947 67A 309 479 7T 4 7uF 20 50V C950 65A 1K 221 5T 220PF 10 1KV C955 65A 1K 221 5T 220PF 10 1KV C961 64A 44J 103 1AT 0 01uF 5 100V C965 64A 44J 103 1AT 0 01uF 5...

Page 26: ...23 TIN COATED FB907 71A 55 9 T SHIELD BEAD J001 95A 90 23 TIN COATED J002 95A 90 23 TIN COATED J003 95A 90 23 TIN COATED J004 95A 90 23 TIN COATED J005 95A 90 23 TIN COATED J006 95A 90 23 TIN COATED J...

Page 27: ...OATED J080 95A 90 23 TIN COATED J081 95A 90 23 TIN COATED J082 95A 90 23 TIN COATED J084 95A 90 23 TIN COATED J085 95A 90 23 TIN COATED J087 95A 90 23 TIN COATED J088 95A 90 23 TIN COATED J089 95A 90...

Page 28: ...602 103 52T 10K OHM 5 1 6W R157 61A 602 103 52T 10K OHM 5 1 6W R160 61A 602 221 52T 220 OHM 5 1 6W R161 61A 602 222 52T 2 2K OHM 5 1 6W R162 61A 602 102 52T 1K OHM 5 1 6W R165 61A 602 222 52T 2 2K OHM...

Page 29: ...HM 5 1 6W R709 61A 602 103 52T 10K OHM 5 1 6W R710 61A 602 103 52T 10K OHM 5 1 6W R711 61A 602 103 52T 10K OHM 5 1 6W R712 61A 602 273 52T 27K OHM 5 1 6W R713 61A 602 562 52T 5 6K OHM 5 1 6W R715 61A...

Page 30: ...6W R995 61A 602 393 52T 39K OHM 5 1 6W R996 61A 602 103 52T 10K OHM 5 1 6W ZD110 93A 39 73 52T HZ6B1 ZD403 93A 39 54 52T HZ12B2 ZD404 95A 90 23 TIN COATED ZD420 93A 39 522 52T TZX20B ZD701 93A 39 518...

Page 31: ...PF 1KV 10 C838 95A 90 23 TIN COATED C840 65A 517K 102 5T 1000PF 500V 10 C841 65A 517K 102 5T 1000PF 500V 10 C842 65A 517K 102 5T 1000PF 500V 10 C861 65A 517M 103 3T 10NF 500V 20 D801 93A 64 11 26T DIO...

Page 32: ...1 26T 390 OHM 5 1 6W R817 61A 602 391 26T 390 OHM 5 1 6W R818 61A 602 100 26T 10 OHM 5 1 6W R819 61A 602 100 26T 10 OHM 5 1 6W R820 61A 602 100 26T 10 OHM 5 1 6W R821 95A 90 23 TIN COATED R823 61A 602...

Page 33: ...20 12 FMP 2FUR 1500 600V 5A Q403 57A 689 6 2SC5297 Q406 57A 415 500 TIP122 PARTS LIST OF Q901 ASS Y LOCATION PARTS No SPECIFICATION 5A 42 501 NYLON WASHER 12A 372 1 SILICONE RUBBER 90A 339 2 A HEAT SI...

Page 34: ...SWIVEL 34A 734 Y L BASE 45A 76 31 RN PE BAG PARTS LIST OF CRT ALTERNATION LOCATION PARTS No SPECIFICATION 750A 5910 5PS 15 CRT C418 63A 210J 432 8FC 0 0043UF 5 2000V P404 33A 8009 3 3P PLUG R414 61A...

Page 35: ...04 Q405 Q406 Q909 Q910 Q907 Q908 IC401 LED CONTROL IC801 Q403 T402 FBT Q402 T401 Q601 Q707 IC601 EHT VERT HOR OSC HOR O P G1 G2 FOCUS PRE AMP HOR DRIVER X RAY PROTECTION PINCUSHION VERT O P CONTROL 25...

Page 36: ...V L906 R929 90V 264V Q911 OUTPUT OUTPUTS B VARIABLE MOSFET POWER VARI SMOOTHED SMOOTHED RECTIFIED RECTIFIED OUTPUTS 4 CONTROL H O T FROM C K T H SYNC H SYNC Is O P F B VCC MOSFET POWER Q901 8 3 6 2 7...

Page 37: ...LED2 UP KEY LED3 DOWN KEY LED4 SELECT LED5 LED6 LED7 LED8 LED9 KEY SELECT SENSE STAND BY SUSPEND WRITE PROTECT SDA SCL OSC1 OSC0 GND VCC RESET_ CONTRAST BRIGHT 22 21 20 19 23 24 18 17 25 26 27 16 15 1...

Page 38: ...VCC SCL SDA 6 5 WP 7 R W CONTROL SENSE AMP YDEC XDEC PAGE LATCHES 128X8 EEPROM ARRAY MEMORY LOGIC LOGIC CONTROL CONTROL I O IC102 24C04 IC901 3842 VCC GND O P Ct Rt Is COMP F B Vref 8 2 1 3 4 6 5 7 U...

Page 39: ...OIRE 23 7 bits VAMP 18 TRACKING GEOMETRY 2 2 X X X X X X 7bits Spin Bal 7 bits VPOS 20 22 7 bits 7 bits RAMP GENERATOR DSCILLATOR VERTICAL CORRECTION S AND C 21 13 Vref Vref 32 27 30 31 2 I C INTERFAC...

Page 40: ...40 11 PCB LAYOUT 11 1 MAIN PCB LAYOUT...

Page 41: ...41 11 2 CRT BOARD LAYOUT...

Page 42: ...2 IC501 R824 R414 R408 R614 R823 R815 R820 C404 R816 D411 R819 R430 R421 C609 R610 R611 R127 J075 R817 R818 C913 R973 H802 R420 R419 C818 C819 C961 D130 C820 C813 C812 C814 C815 C816 VR801 VR802 R814...

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