CTX EX-710F Service Manual
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CTX EX-710F Service Manual

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EX-710F
SERVICE MANUAL
CTX
EDITION 1
The Monitor Specialists
JAN. 2001

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  • Page 1 EX-710F SERVICE MANUAL EDITION 1 The Monitor Specialists JAN. 2001...
  • Page 2 Copyright 2001 by Chuntex Electronic Co., Ltd. The CTX SERVICE MANUAL is published by Chuntex Electronic Co., Ltd. All rights reserved. No part of this manual may be used, copied, reproduced, or transmitted in any form or by any means for any purpose without the express written permission of the publisher.

  • Page 3: Table Of Contents

    PRODUCT SAFETY NOTICE..............................TECHNICIAN NOTICE................................. 2 2.0 GENERAL MAINTENANCE PROCEDURE........................ 4 3.0 FUNCTION BLOCK DIAGRAM............................5 4.0 DESCRIPTION OF CIRCUIT............................6 1.0TIMING MODE (CTX PRESETTING TIMING)......................7 6.0 ADJUSTMENT.................................. 9 6.1 CFA1797B ADJUSTMENT............................9 7.0 TROUBLESHOOTING..............................12 7.1 MAIN TROUBLESHOOTING ROUTINE........................12 7.2 POWER SUPPLY CIRCUIT TROUBLESHOOTING ROUTINE................

  • Page 5: Important Notice & Introduction & Safety Notice

    Tektronix TDS 520 digital oscilloscope, the monitor receives VGA-480 full white square pattern. 3. The Spare parts list offers the CTX part number (P/N) which is used frequently by repairmen /...

  • Page 6: Check Of High Voltage Hold Down Circuit

    1.0 IMPORTANT NOTICE & INTRODUCTION & SAFETY NOTICE CFA1797B 2. Set Brightness, Contrast controls to max.. High Voltage 3. Short the two pins of P402 as shown in Fig. 2. This monitor is provided with a high voltage hold The picture should disappear immediately. down circuit for clearly indicating that voltage has increased in excess of a predetermined value.
  • Page 7 CFA1797B 1.0 IMPORTANT NOTICE & INTRODUCTION & SAFETY NOTICE switch is still on, approximately 5 sec the energy of C104 could be discharged quickly. 2. If you turn off power switch first, then you pull the AC plug the energy of C104 will be discharged very slowly;...

  • Page 8: General Maintenance Procedure

    2.0 GENERAL MAINTENANCE PROCEDURE CFA1797B 2.0 GENERAL MAINTENANCE PROCEDURE START CHECK AND RECORD THE FAILURE MODE OF CUSTOMER VISUAL CHECK THE APPEARANCE OF CABINET/ REPLACEMENT CHECK PICTURE PERFORMANCE REPAIR & ADJUSTMENT BURN IN 24 HOURS RE-CHECK PICTURE PERFORMANCE RECORD...

  • Page 9: Function Block Diagram

    CFA1797B 3.0 FUNCTION BLOCK DIAGRAM 3.0 FUNCTION BLOCK DIAGRAM +210V +80V POWER +15.5V AC INPUT SUPPLY +12V -16V VERT.YORK POWER SAVING S0-S3 V-CENTER H-SYNC CS CONTROL V-SIZE MICRO PROCESSOR VERTICAL Q315-Q322 V-SYNC & EEPROM DEFLECTION C358,C359,C361 IC501,502 IC201 C362 DATA H-PULSE HOR./VERT.OSC DC TO DC...

  • Page 10: Description Of Circuit

    CFA1797B 4.0 DESCRIPTION OF CIRCUIT (EEPROM). The outputs of IC501 were 4.0 DESCRIPTION OF CIRCUIT connected to other function circuit (IE. H-size, H-phase, V-size, and V-center…). Also, the Power supply circuit user can adjust picture from keyboard and the data will be saved into IC502 automatically. The AC voltage input connected to EMI circuit For the O.S.D.

  • Page 11: Timing Mode (Ctx Presetting Timing)

    CFA1797B 5.0 TIMING MODE (CTX presetting Timing) 1.0 TIMING MODE (CTX presetting Timing) NAME 720X400-70 640X480-60 800X600-75 800x600-85 MAC II-832 PIXEL CLOCK 28.322 MHz 25.175 MHz 49.500 MHz 56.250 MHz 57.284MKz 31.469 kHz 31.469 kHz 46.875 kHz 53.674 kHz 49.726MKz 70.087 HZ...
  • Page 12 5.0 TIMING MODE (CTX presetting Timing) CFA1797B NAME 1024x768-75 1024X768-85 1152X864-75 1280X1024-75 1280X1024-85 PIXEL CLOCK 78.751MHZ 94.500MHZ 108.000MHZ 135.000MHZ 157.500MHZ 60.024KHZ 68.677KHZ 67.500KHZ 79.976KHZ 91.146KHZ 75.030HZ 84.996HZ 75.000HZ 75.024HZ 85.240HZ INTERLACE MODE VIDEO ANALOG-COLOR ANALOG COLOR ANALOG-COLOR ANALOG COLOR ANALOG-COLOR...

  • Page 13: Adjustment

    CFA1797B 6.0 ADJUSTMENT 6.0 ADJUSTMENT 6.1 CFA1797B ADJUSTMENT REM: PRESET MODE DATA ADJUSTMENT: A. Turn off it. B. Press the at same time which on the external control panel. C. Turn on it. Remark: Before adjusting, monitor must warm up 20 minutes and CRT must be degaussed. ADJUSTMENT LOCATION SPECIFICATION/DESCRIPTION...
  • Page 14 6.0 ADJUSTMENT CFA1797B ADJUSTMENT LOCATION SPECIFICATION/DESCRIPTION TIMING & PATTERN WHITE BALANCE OSD. R.G.B GAIN VGA-480, FULL MODE1(9300 K):x=28310 WHITE :y=29710 MODE2(6500 K):x=31310 :y=32910 MODE3(5000 K):x=34610 :y=35910 OSD. R.G.B BIAS MODE1(9300 K):x=28310 :y=29710 When contrast is in Y  13FL. BRIGHTNESS OSD.
  • Page 15 CFA1797B 6.0 ADJUSTMENT ADJUSTMENT LOCATION SPECIFICATION/DESCRIPTION TIMING & PATTERN CONVERGENCE Adjustment location TLV 1280X1024-75 H-80KHz. X’HATCH Adjustment location YCH 1280X1024-75 H-80KHz. X’HATCH Adjustment location YBH 1280X1024-75 H-80KHz. X’HATCH...

  • Page 16: Troubleshooting

    7.0TROUBLESHOOTING CFA1797B 7.0 TROUBLESHOOTING 7.1 MAIN TROUBLESHOOTING ROUTINE START POWER SUPPLY CKT. CHECK POWER INDICATOR TROUBLESHOOTING ROUTINE POWER SAVING CKT. AMBER LED COLOR ? TROUBLESHOOTING ROUTINE GREEN POWER SUPPLY CKT. CHECK 210V,80V,15.5V, DOES IMAGE APPEAR TROUBLESHOOTING 7V,5V,-16V,+12V ROUTINE & ADJUSTMENT DEFLECTION CKT.

  • Page 17: Power Supply Circuit Troubleshooting Routine

    CFA1797B 7.0TROUBLESHOOTING 7.2 POWER SUPPLY CIRCUIT TROUBLESHOOTING ROUTINE START CHECK AC COMPONENTS CHECK DC VOLTAGE OF NTC101,L102,L103,C104, C104 (+/-) PINS F101,BD101,L104,D102. CHECK GATE VOLTAGE OF CHECK VOLTAGE OF IC101 CHECK R102,R112 PIN 7 SW101 Q104 AND R126 CHECK Q116,Q117,IC103 CHECK AC OUTPUT OF CHECK RL102,Q113, IC104,ZD103 T101 2ND WINDING...
  • Page 18 7.0TROUBLESHOOTING CFA1797B TEST CONDITIONS: TIMING: 640X480-60Hz (31K) PATTERN: CROSS HATCH Unit: Volt IC101 (3842) Q104(FS10SM-16A) IC103(PS2561) AC IN 110V 3.15 2.51 0.14 2.47 6.21 16.69 5.02 0.14 152.51 5.92 0.95 16.68 220V 3.00 2.52 0.07 2.45 63.02 76.63 5.01 0.07 317.16 2.76 1.39...

  • Page 19: Micon Circuit Troubleshooting Routine

    CFA1797B 7.0TROUBLESHOOTING 7.3 MICON CIRCUIT TROUBLESHOOTING ROUTINE START IS CPU IN POWER SAVING CHECK IC501,P501, IC102,Q107,Q109,Q110,Q111 MODE ? CHECK MODE DATA CAN REPLACE IC501,IC502 BE SAVED ? CHECK EXTERNAL REFER TO " DEFLECTION CHECK IC501,IC601 & VIDEO CKT. CONTROL PANEL TROUBLESHOOTING ROUTINE FUNCTION...
  • Page 20 7.0TROUBLESHOOTING CFA1797B TEST CONDITIONS: AC LINE IN:110V/60Hz PATTERN: CROSS HATCH STATUS : NORMAL Unit: Volt IC501 (68P61A) MODE 640X480-60(31K) 0.98 0.55 0.96 5.00 5.02 2.69 2.52 5.01 5.01 800X600-85(53K) 0.98 0.55 0.98 5.00 5.02 2.68 2.51 5.01 5.01 1024X768-85(68K) 0.98 0.55 0.98 5.00...
  • Page 21 CFA1797B 7.0TROUBLESHOOTING Q501 (A733) Q504 (C945) Q506 (JC337) MODE 640X480-60(31K) 5.02 5.01 4.32 5.00 0.01 8.02 13.37 8.62 800X600-85(53K) 5.02 5.01 4.32 5.00 0.01 8.02 15.38 8.63 1024X768-85(68K) 5.02 5.01 4.32 5.00 0.01 8.02 15.38 8.62 1280X1024-85(91K) 5.02 5.01 4.32 5.00 0.01 8.00...

  • Page 22: Video Circuit Troubleshooting Routine

    7.0TROUBLESHOOTING CFA1797B 7.4 VIDEO CIRCUIT TROUBLESHOOTING ROUTINE START CHECK OUTPUT VOLT. CHECK CRT SOCKET OR (R.G.B) OF IC604 CHECK Q634,Q635,Q654, Q655,Q674,Q675 OR THEIR PERIPHERAL PARTS CHECK INPUT VOLT (R.G.B) REPLACE IC604 OF IC604 CHECK PIN19 (CLAMPING REPLACE Q512 VOLTAGE OF IC601) CHECK SIGNAL INPUT AT REPLACE IC601 OR OTHER PIN11(R), PIN6(G), PIN2(B)
  • Page 23 CFA1797B 7.0TROUBLESHOOTING TEST CONDITIONS: AC LINE IN:110V/60Hz TIMING: 640X480-60Hz (31K) PATTERN: a. Cross-hatch b. Full white Unit: Volt IC601 (M52743) MODE 0.65 2.45 11.78 0.14 2.44 0.01 11.77 0.14 Cross-hatch Full white 0.64 2.85 11.76 0.14 2.85 3.03 11.75 0.14 IC601 (M52743) MODE Cross-hatch...
  • Page 24 7.0TROUBLESHOOTING CFA1797B Q607 (A733) Q608 (C945) MODE Cross-hatch 3.11 5.14 0.37 5.02 0.09 Full white 2.81 2.23 0.79 5.02 0.52 Q634 (BF423) Q635 (BF422) Q654 (BF423) MODE Cross-hatch 70.65 70.32 1.19 58.20 1.79 67.60 68.11 Full white 70.49 70.49 1.19 58.43 1.79 68.34...

  • Page 25: Deflection Circuit Troubleshooting Routine

    CFA1797B 7.0TROUBLESHOOTING 7.5 DEFLECTION CIRCUIT TROUBLESHOOTING ROUTINE 7.5.1 Horizontal Deflection Circuit No Raster START CHECK GATE OF CHECK PIN 2 CHECK Q401,D401 Q402 VOLTAGE OF FBT (DISCONNECT PIN1 OF FBT ) AND DRAIN OF Q402 CHECK VOLTAGE OF Q407 ,Q409 CHECK R315,R318 CHECK PIN25 REPLACE IC401...

  • Page 26: H-Asynchronous

    7.0TROUBLESHOOTING CFA1797B H-Asynchronous START CHECK H-SYNC INPUT CHECK IC501,P501 OR (PIN1) OF IC301 H-SYNC I/P (SIGNAL CABLE) CHECK PIN4,5,6,8,9,10,12 CHECK C301-C307,R303,R304 VOLTAGE OF IC301 OR REPLACE IC301...

  • Page 27: No Horizontal Scan

    CFA1797B 7.0TROUBLESHOOTING No Horizontal Scan START CHECK Q311 "SOURCE" CHECK Q311,ZD303,R339 VOLTAGE R340, D313, R341 CHECK Q309,Q310,D309,T303 CHECK Q307, Q308 T304,R349,D314 OR OR PERIPHERAL PARTS. PERIPHERAL PARTS. REPLACE IC301 REPLACE T304...

  • Page 28: Linearity

    7.0TROUBLESHOOTING CFA1797B Linearity START (LINEAR COIL) DOES PICTURE LEFT CHECK T302, Q303, Q304, R334 SQUARE MORE BIG THAN L301AND THEIR RIGHT SQUARE (OR RIGHT PERIPHERAL PARTS MORE BIG THAN LEFT) DOES PICTURE LEFT AND RIGHT SQUARE MORE BIG THAN MIDDLE (CS) CHECK GATES VOLTAGE OF Q315,Q316,Q317,Q318...

  • Page 29: Out Of Phase

    CFA1797B 7.0TROUBLESHOOTING Out of phase START CHECK IC301,IC501,C304 ADJUST OSD H-PHASE C305,C306,R304 OR OTHER MANUAL PERIPHERAL PARTS Width Abnormal START ADJUST OSD. H-SIZE MANUAL REPLACE IC501 OR IC301 REFER TO “NO HORIZONTAL AND THEIR PERIPHERAL SCAN” TROUBLESHOOTING PARTS ROUTINE...

  • Page 30: Vertical Deflection Circuit

    7.0TROUBLESHOOTING CFA1797B 7.5.2 Vertical Deflection Circuit No vertical scan START CHECK VERT. O/P AT PIN5 CHECK P401 VERT. YOKE OF IC201 R207, R208, R226, C207 CHECK PIN1,7 OF IC201 REPLACE IC201 OR IT'S OR PIN13,23 OF IC301 PERIPHERAL PARTS CHECK V-SYNC (PIN2) OF CHECK C314,C315,R316 IC301 REPLACE IC301 OR...

  • Page 31: Picture Distortion

    CFA1797B 7.0TROUBLESHOOTING Picture distortion START RE-ADJUST GEOMETORY & PINCUSHION CHECK WAVE FORM PIN24 OF IC301 REPLACE IC301 OR IC501 OR IT’S PERIPERAL PARTS...

  • Page 32: V-Asynchronous

    7.0TROUBLESHOOTING CFA1797B V-Asynchronous START CHECK V-SYNC (PIN2) OF CHECK V-SYNC I/P OF IC301 IC501,P501, ZD503 CHECK PIN 19,20,22 OF REPLACE IC301 C314,C315,C316 REPLACE IC301 Vertical position & Size START RE-ADJ SIZE OR POSITION CHECK IC501,IC301 AND REPLACE IC301,IC501 OR THEIR PERIPHERAL PARTS OTHER DEFECTIVE PARTS REPLACE IC201...

  • Page 33: Other

    CFA1797B 7.0TROUBLESHOOTING 7.5.3 Other Poor focus START ADJ FOCUS VRs OF CHECK THE CENTRAL FOCUS IS UNIFORM G3 DISCHARGE REPLACE CRT WITH CORNER ? CHECK T305,Q415 CHECK IC501, IC301 OR THEIR PERIPHERAL PARTS REPLACE R416 OR...
  • Page 34 7.0TROUBLESHOOTING CFA1797B TEST CONDITIONS: AC LINE IN:110V/60Hz PATTERN: CROSS HATCH STATUS : NORMAL Unit: Volt IC201 (TDA8172) MODE 640X480-60(31K) 1.10 14.64 -14.66 -15.18 0.42 14.25 1.10 800X600-85(53K) 1.10 14.68 -14.53 -15.22 0.38 14.40 1.10 1024X768-85(68K) 1.10 14.68 -14.54 -15.23 0.38 14.39 1.10 1280X1024-85(91K)
  • Page 35 CFA1797B 7.0TROUBLESHOOTING Q303 (JC337) Q304 (A733) MODE 640X480-60(31K) 1.83 6.34 2.43 2.43 1.78 800X600-85(53K) 2.48 6.33 3.09 3.09 2.46 1024X768-85(68K) 3.07 6.32 3.69 3.69 3.07 1280X1024-85(91K) 4.45 6.29 5.11 5.11 4.50 Q305 (C945) Q307 (C945) Q308 (A733) MODE 640X480-60(31K) 0.09 0.27 8.08 11.98...
  • Page 36 7.0TROUBLESHOOTING CFA1797B Q321 (C3400) Q322 (C3400) Q401 (FS3KM-18A) MODE 640X480-60(31K) 11.97 11.97 0.05 207.84 1.29 800X600-85(53K) 11.97 0.03 4.99 0.05 207.78 1.95 1024X768-85(68K) 0.03 4.99 11.96 0.05 207.74 2.46 1280X1024-85(91K) 0.03 4.98 0.03 4.98 0.05 207.69 3.19 Q402 (IRF9634) Q407 (C945) Q409 (A733) MODE 640X480-60(31K)

  • Page 37: Ic Configuration

    CFA1797B 8.0 IC CONFIGURATION 8.0 IC CONFIGURATION (1) 3842 (IC101) COMP Vref Inverted input Supply votage CURRENT OUTPUT Flyback generator SENSE Ground Rt/Ct GROUND Output Output Stage Supply Non inverted input (2) TDA8172 (IC201) (3) TDA9112 (IC301) Horizontal sync Input Vertical Dynamic Focus Output Vertical sync Input SDA (I C Data Input)
  • Page 38 8.0 IC CONFIGURATION CFA1797B (5) 68P61A (IC501) 40 VSYNCI 39 HSYNCI R-BI RESET L-BI R-TI L-TI OSCO PURI OSCI HSYCO DATA VSYCO DATA MUTE RECOVER H-F/V BRIT (6) M52743BSP (IC601) (7) M35045 (IC603) OSD BLK IN VCC2 IN PUT (R) OUT PUT (R) VCC1 (R) CPOUT...

  • Page 39: Parts List

    CFA1797B 9.0 PARTS LIST 9.0 PARTS LIST CFA1797B Parts List Abbreviations : Capacitors EL: Electrolytic Aluminum, TA: Tantalum, CE: Ceramic PP: Polypropylene, PEI: Polyster (Inductive), PEN: Polyster (Non-Inductive) PPS: Serial Poly Propylene, MPE: Polyster Metalized, MPP: Polypropylene Metalized. Resistors CF: Carbon Film, MF:Metal Film, VR: Variable Resistor. MOF: Metal Oxide Film, POT: Potentiometer Semiconductor TR: Transistor, DI: Diode, ZD: Zener Diode, IC: IC.
  • Page 40 LOCATION PART NO. DESCRIPTION ZD501 15Z33M3990H DI ZENER 3.9V 5% 0.5W LOCATION PART NO. DESCRIPTION D301 15S11M001F DI SW 0.5A 50V 1N4148  D309 15S3C-901F DI MD SW 8A 1500V DD84RC ZD502 15Z33M5190H DI ZENER 5.1V 5% 0.5W D310 15S35T201F DI MD SW 1A 400V BYD33G ZD503 15Z33M5190H...
  • Page 41 CFA1797B 9.0 PARTS LIST R208 23245-2214 RES MOF 220R 5% 1W R414 22215-103M RES CF 10K 5% 1/8W R223 23755-1004 RES MOF 10R 5% 2W R415 22215-105M RES CF 1M 5% 1/8W LOCATION PART NO. DESCRIPTION LOCATION PART NO. DESCRIPTION R416 22245-1021 RES CF 1K 5% 1/2W...
  • Page 42 R535 22215-101M RES CF 100R 5% 1/8W R665 22215-101M RES CF 100R 5% 1/8W R536 22225-102M RES CF 1K 5% 1/4W R666 22225-472M RES CF 4K7 5% 1/4W R667 22215-471M RES CF 470R 5% 1/8W LOCATION PART NO. DESCRIPTION LOCATION PART NO.
  • Page 43 CFA1797B 9.0 PARTS LIST C137 28HB7-1015 CAP E 100U 20% 250V C371 28H67-479R CAP E 4U7 20% 50V C139 34145-1044 CAP MPE 0.1U 5% 250V C401 28HB7-4701 CAP E 47U 20% 250V C141 39546-221R CAP C 220P 10% 1KV C402 34145-4734 CAP MPE 0.047U 5% 250V C142...
  • Page 44 C610 28H37-101R CAP E 100U 20% 16V C611 28H37-101R CAP E 100U 20% 16V C612 39999-104R CAP C 0.1U +80-20% 50V C613 39999-104R CAP C 0.1U +80-20% 50V LOCATION PART NO. DESCRIPTION LOCATION PART NO. DESCRIPTION C614 39646-4718 CAP C 470P 10% 2KV C646 39187-103R CAP C 0.01U 20% 50V...
  • Page 45 CFA1797B 9.0 PARTS LIST *=0.25 430008300 CARD BOARD 50*50*2170*5T 510119800 HOLDER E.P.S (TOP) 510120800 HOLDER E.P.S (BOTTOM) *=0.622 570001900 PACKTHREAD P.P. (0.015ML=1800M) CARTON (BOTTOM*3) 584066500 STAPLES NO:33-19 LOCATION PART NO. DESCRIPTION 610001100 SHEEET WARNING 620422100 USER MANUAL SHEET (TCO99) 620649100 USER MANUAL (PR711FL) 650031200 WARRANTY CARD (LCD)
  • Page 46 P401B 65W67-29D0 CONN H/T WIRE 1015#22 6P-1 3.96 29L P507 65W81340B1 CONN H/H 1007#24 8P-22.5/2.0 40L-T W/C P104 65WD1333B1 CONN H/T WIRE 1007#24 14P 2.5 33L-T W/C 859001-401 TAPE STRETCH FILM W=500MM 1500 M/RI 98T111-P37 DISKETTE 3.51N 1.44M (INF)(CTX VER2.0)

  • Page 47: Layout For Main Components And Adjusted

    CFA1797B 10.0 LAYOUT FOR MAIN COMPONENTS AND ADJUSTED 10.0 LAYOUT FOR MAIN COMPONENTS AND ADJUSTED 11.0 CIRCUIT DIAGRAM 12.0 EXPLODED VIEW...
  • Page 48 1795PF2...
  • Page 49 CTA1786C...
  • Page 51 M E M O OWNER:...

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