AOpen A70PF Service Manual
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AOpen A70PF Service Manual

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A70PF
Service Manual
A70PF(RX-777NS)
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Summary of Contents for AOpen A70PF

  • Page 1 A70PF Service Manual A70PF(RX-777NS) 1 / 33...

  • Page 2: Table Of Contents

    D. ADJUSTMENT CONTROL LOCATION -------------------------------------- E. ADJUSTMENT PROCEDURE ----------------------------------------------------- F. BLOCK DIAGRAM -------------------------------------------------------------------- G. TROUBLE SHOOTING HINTS -------------------------------------------------- H. BILL OF MATERIAL ---------------------------------------------------------------- I. EXPLODED DIAGRAM ------------------------------------------------------------ J. SCHEMATIC DIAGRAM ----------------------------------------------------------- K. PCB LAYOUT DIAGRAM ---------------------------------------------------------- A70PF(RX-777NS) 2 / 33...

  • Page 3: Warning

    To prevent from fire or shock hazard,do not expose monitor to any rain or any form of water.High voltage is inside the monitor so please do not remove the back cover of the cabinet if you are not a qualified monitor engineer.Contact the local dealer or the nearest AOpen branch office if you need help. A. IMPORTANT SAFETY INSTRUCTION Prior to using this service manual,please ensure that you have carefully followed all the procedures outlined in the user's manual for this product.

  • Page 4: Specifications

    6. Red Ground 11. Ground 2. Green 7. Green Ground 12. SDA 3. Blue 8. Blue Ground 13. Horizontal Sync. 4. Ground 9. Not Connected 14. Vertical Sync. 5. Self Test 10. Sync. Ground 15. SCL A70PF(RX-777NS) 4 / 33...

  • Page 5: Timing Chart

    0.019 0.017 0.016 0.061 0.015 Porch －. － － . ＋ －. － ＋ . ＋ ＋ . ＋ ＋ . ＋ ＋ . ＋ ＋ . ＋ ＋ . ＋ ＋ . ＋ SYNC Interlaced A70PF(RX-777NS) 5 / 33...

  • Page 6: Adjustment Control Location

    D.ADJUSTMENT CONTROL LOCATION A70PF(RX-777NS) 6 / 33...

  • Page 7: Adjustment Procedure

    Also you can select exit icon or press key to exit the OSD menu. A70PF(RX-777NS) 7 / 33...
  • Page 8 ABL on the OSD menu. (68KHz,1024x768) ﹫ Full White 1. Set the FREQ. to 73 Other Function (85Hz 1024*768) 2. Set the OSD to PROVIEW Seting 3. Set the BURN to Disable 4. Set the DEFO to TDA9116/9118 A70PF(RX-777NS) 8 / 33...
  • Page 9 6 pole pawels. 6. Rotate the two pawels at contrast angle so that the red and blue horizontal lines can unite with the green. 7. If the vertical lines deviate,change the angle of Pawels from the deviation position. A70PF(RX-777NS) 9 / 33...
  • Page 10 A70PF(RX-777NS) 10 / 33...
  • Page 11 A70PF(RX-777NS) 11 / 33...

  • Page 12: Block Diagram

    IC901 Processor IC901 24LC08 IC601 EMC6700 TDA9116/8 Horizontal Def. Control O/P Stage T701 Q703,D709 H-Driver Voltage T702,Q702 Regulator Degauss D502,D508, 15.5V D510,D513, 7.5V Power Cord SMPS Booster D509 Dynamic Focus AC100-240V I501 Q719,D719 -13V T703,Q713 KA3842 A70PF(RX-777NS) 12 / 33...

  • Page 13: Trouble Shooting Hints

    AC230V IN 308V T501 (7) CHECK F501,D514 , 160 V ? D515,D516, D517 IC501 (7) CHECK IC501,R539, ＞ 14 V ? D505,ZD551 IC501(2) CHECK 2.5V ? IC501,Q504 D510 (-) CHECK 15.5V ? D510,Q501, Q508 CIRCUIT SHORT A70PF(RX-777NS) 13 / 33...
  • Page 14 BRIGHT HOR. LINE APPEAR ON THE SCREEN IC301 (2) CHECK LINE 12 V ? IC301 (4) CHECK -12V LINE -10.5 V ? IC301 (1) CHECK IC601 0.7 V IC301 (5) CHECK IC301 48 V CHECK CRT DY A70PF(RX-777NS) 14 / 33...
  • Page 15 7.2 V ? < 0.7 V ? > 2.0 V ? CHECK CHECK CHECK Deflection Horizontal 26KV ? IC601 IC901 CRT G2 CHECK CHECK VIDEO 600V ? T701 FBT VIDEO CKT KR,KG,KB FAILURE VOLTAGE CHECK CRT TUBE A70PF(RX-777NS) 15 / 33...
  • Page 16 51V? DRIVE PULSE Q702 (G) CHECK REPLACE NO POWER DRIVE B+ 51V Q608 PULSE CHECK Q719,(G) CHECK CHECK DRIVE IC601 Q719 = 15V? PULSE? Q601, CHECK CHECK CHECK Q602 (B) IC601 SURRONDING 15V LINE T702 BOUT A70PF(RX-777NS) 16 / 33...
  • Page 17 STAND BY OFF/ON ORANGE PS 0 IC901 OFF/OFF ORANGE 0 V ? IC901 PIN40,PIN41 SIGNAL. Q505 (C) CHECK Q505 PIN40 PIN41 7.0 V ? NORMAL CHECK CHECK STAND BY Q511 (B) IC901 0 V ? CHECK Q511 A70PF(RX-777NS) 17 / 33...
  • Page 18 ROTATION P903 CHECK OK ? Rotation Coil Q902 (c) CHECK 15 V ? 15V LINE Q903 (E) CHECK 7 V ? 7V LINE Q904 (B) CHECK 2.5V ? IC901 CHECK Q904 A70PF(RX-777NS) 18 / 33...
  • Page 19 NO CHARACTERS MISSING ONE Example:Missing Green CRT KG RASTER IC203 (3) CHECK 39 V IC203 IC203 CHECK 12 V ? IC201 CHECK (10.18) 5V ? IC201 IC201 (6) CHECK I/P SIGNAL 0.7V CHECK IC201 A70PF(RX-777NS) 19 / 33...

  • Page 20: Bill Of Material

    H. Bill of Material No. Parts Number Parts Description Unit Q'ty Location 1 002-L16-AOPEN USER MANUAL 2 005-009-AOPEN-C CARTON 3 200-100-P6NS MAIN/B REV:B+++ Brite Plu PCB, 4 200-200-P6NS CRT/B REV:B+ Brite Plus 5 200-700-RXP6 CONTROL PCB REV:B+ 6 210-100-0256 R-CF. 10 ohm 1/2W +-5%.
  • Page 21 R-CF. 47K ohm 1/4W +-5%. R619,R669, 85 210-473-0856 R-CF. 47K ohm 1/8W +-5%. R522,R932,R940,R941,R507,R622, 86 210-474-0256 R-CF. 470K ohm 1/2W +-5%. R501, 87 210-474-0856 R-CF. 470K ohm 1/8W +-5%. R7B4, 88 210-475-0856 R-CF 4.7M ohm 1/8W +-5%. R287, A70PF(RX-777NS) 21 / 33...
  • Page 22 R-PRE. 10.5K ohm 1/8W +-1%. R609, 132 221-081-2003 R-PRE. 200K ohm 1/8W +-1%. R751, 133 221-081-2400 R-PRE. 240 ohm 1/8W +-1%. R749, 134 221-081-2702 R-PRE. 27K ohm 1/8W +-1%. R747, 135 221-081-3002 R-PRE. 30K ohm 1/8W +-1%. R753, A70PF(RX-777NS) 22 / 33...
  • Page 23 CC. 1000pF/50V +-10% TP. C740A, 178 307-102-3160 CC. 1000pF/500V +-10%. C718, 179 307-102-3570 CC.1000pF/500V +-20% TP. C2A2, 180 307-103-1160 CC. 0.01uF/50V +-10% TP. C701, 181 307-103-3570 CC. 0.01uF/500V +-20% TP. C2A7,C280,C277, 182 307-103-3570 CC. 0.01uF/500V +-20% TP. C506,C746,C747,C528, A70PF(RX-777NS) 23 / 33...
  • Page 24 MEM. 0.22uF/63V +-5%. C307, 224 318-225-2552-Y MEM 250V 2.2uF High-Current C716, MEM. 2700pF/100V +-5% TP BOX 225 318-272-0150-B C793, Fala 226 318-474-0650 MEM. 0.47uF/63V +-5% TP. C606,C704, 227 318-682-0650 MEM. 6800PF/63V +-5%. C309, 228 319-101-1060 CERAMIC-CAP 100pF/1KV. C719, A70PF(RX-777NS) 24 / 33...
  • Page 25 264 510-070-0122 TRANSISTOR TIP122. 265 510-200-0423 TRANSISTOR BF423 PNP. Q710, 266 510-267-6718 TRANSISTOR H2N6718L NPN. Q702, 267 510-300-SA44 TRAN'R HMPSA44 400V/0.3A HSMC EA Q713, 268 511-001-3115 P5/P6 TRANSISTOR 2SK3115. Q504, 269 511-005-0634B FET IRF634B FAIRCHILD. Q719, A70PF(RX-777NS) 25 / 33...
  • Page 26 SIGNAL CABLE 1.5M Wire UL1007 AWG24 40mm Tin 305 620-040-0200 G3->G3', Black 306 621-030-0300-1 WIRE 1007#18BLK 30mm 307 621-060-0411 WIRE UL1015#18 60mm 308 621-090-0300A 1007#18BLK 90mm 4.3D+B End 309 624-200-0405 P6 5P2.0-6P2.0 200mm Flat Cabl M901, A70PF(RX-777NS) 26 / 33...
  • Page 27 346 760-100-0002 R584,L706, BEADS INDUCTOR(TAPING3.5*6*0.8 347 760-100-0008 BEAD CORE (RH3.5*9*0.8). L514,L517, 348 760-100-0013 BEAD CORE RH3.5*4*1.2 Mat:T6 Q719D,FOR C712, 349 800-100-772NS CRT WIRE 350 899-100-787NS CRT BOARD ASS'Y. 351 899-400-RXP6 CONTHL/B ASS'Y 352 899-TSP-XG51 M/B ASS'Y. A70PF(RX-777NS) 27 / 33...
  • Page 28 700-117-2514 151-00N-CAJG-B Rear Cover 900-TSP-XG51 PCB Board 111-014-0201 Rubber Washer 899-400-RXP6 Key Board 154-000-RX17 Adjustor Knob 105-010-3012 Screw 152-002-PX17R bracket right 152-002-X17L bracket left 105-016-3012 Screw 105-016-4012 Screw 151-701-CAJG Stand (Base)Plate 108-325-5012 Screw 154-00G-572B-A I/O plate A70PF(RX-777NS) 28 / 33...

  • Page 29: Exploded Diagram

    I. EXPLODED DIAGRAM A70PF(RX-777NS) 29 / 33...

  • Page 30: Schematic Diagram

    J. SCHEMATIC DIAGRAM A70PF(RX-777NS) 30 / 33...

  • Page 33: Pcb Layout Diagram

    K. PCB LAYOUT DIAGRAM MAIN BOARD A70PF(RX-777NS) 31 / 33...
  • Page 34 CRT BOARD A70PF(RX-777NS) 32 / 33...
  • Page 35 MEMO A70PF(RX-777NS) 33 / 33...

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