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Acer AF715 Series Service Manual

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SERVICE GUIDE

COLOR MONITOR

(AF715 Series)
41AB793Z-ACER-A00
P/N : B793Z-01-A
Date: Mar-18-03
Ver : A00

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  • Page 1: Color Monitor

    SERVICE GUIDE COLOR MONITOR (AF715 Series) 41AB793Z-ACER-A00 P/N : B793Z-01-A Date: Mar-18-03 Ver : A00...
  • Page 2 THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS LIABILITY FOR CHANGES, ERRORS OR OMISSIONS, MANUFACTURE DATE : Mar.
  • Page 3: Table Of Contents

    TABLE OF CONTENTS PAGE 1. SPECIFICATIONS ..................... 2. PRECAUTION AND NOTICES ................2-1 SAFETY PRECAUTIONS ................2-2 PRODUCT SAFETY NOTICE ............... 2-3 SERVICE NOTES ................... 2-4 HIGH VOLTAGE WARNING ............... 3. OPERATING INSTRUCTIONS ................4. ADJUSTMENT ......................4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS ....... 4-2 MAIN ADJUSTMENTS .................
  • Page 4: Specifications

    1. SPECIFICATIONS FOR 7Klr SERIES COLOR MONITOR CRT : 43.2CM(17") 90 Deflection, 29mm Neck, Pure flat 0.25mm Dot Pitch, Non-Glare Screen Viewable image Size: 40.6CM (16") diagonal Display Color: Unlimited Colors External Controls: Power On/Off, OSD key, Function knob: Contrast, Brightness, H-Size, H-Center, V-Size, V-Center, ZOOM, Pincushion, Trapezoid, Pin-Balance, Parallelogram, Rotation, Moire Reduce,H-Convergence, V- Convergence language select, Recall, Degaussing, Color Temperature.
  • Page 5 11. Power Source: Switching Mode Power Supply AC 100 ~240V, 50/60Hz Universal Type 12. Operating Temperature: C to 35 C Ambient 13. Humidity : 10% to 85% Relative, Non-Condensing Weight: 17.0 Kgs(Net), 20.5Kgs(Gross) • Dimensions Monitor: Carton: 570(W) × 530(H) × 540(D) mm Monitor: 430(W) ×...
  • Page 6: Precaution And Notices

    2. PRECAUTIONS AND NOTICES SAFETY PRECAUTIONS 1. Observe all caution and safety related notes located inside the display cabinet. 2. Operation of the display with the cover removed, may cause a serious shock hazard from the display power supply. Work on the display should not be attempted by anyone who is not thoroughly familiar with precautions necessary when working on high voltage equipment.
  • Page 7: High Voltage Warning

    HIGH VOLTAGE WARNING Operation of monitor outside of cabinet or with back removed may cause a serious shock hazard. Work on this model should only be performed by those who are thoroughly familiar with precautions necessary when working on high voltage equipment.
  • Page 8: Operating Instructions

    3. OPERATING INSTRUCTIONS This procedure gives you instructions for installing and using the 7K color display. Position the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduit ground.
  • Page 9: Adjustment

    4. ADJUSTMENT 4-1 ADJUSTMENT CONDITIONS AND PRECAUTIONS Approximately 30 minutes should be allowed for warm up before proceeding. Adjustments should be undertaken only on those necessary elements since most of them have been carefully preset at the factory. 4-2 MAIN ADJUSTMENTS FUNCTION LOCATION DESIGNATION...
  • Page 10 F H :6 8 .7 K H z F V :8 5 .0 H z 9 3 0 0 6 5 0 0     G B CONTRAST H-MOIRE REDUCE BRIGHTNESS V-MOIRE REDUCE(No use) H-CENTER R-GAIN H-SIZE G-GAIN V-CENTER B-GAIN V-SIZE...
  • Page 11 3. White Balance, Luminance adjustment: A. Bias (Low Luminance) adjustment: (a) Set mode 5 1024×768 Fh: 68.6KHz full white pattern. (b) To make the adjustment condition is under the Factory preset window. Same as step 2-C. (c) Warm up more than 30 minutes. (d) Brightness set to center.
  • Page 12: Circuit Description

    RELATIVE PLACEMENT OF TYPICAL COMPONENTS Purity Magnets 6-pole Convergence Magnets 4-pole Convergence Magnets Deflection Yoke 6. Convergence adjustment A. Produce a magenta crosshatch on the display. B. Adjust the focus for the best overall focus on the display. Also adjust the brightness to the desired condition. C.
  • Page 13 On Screen Display Controller The IC802 on video board is designed for display the built-in characters or fonts onto monitor screen. The display operation is by transforming data and control information from micro controller to RAM through a serial data interface. Pin2 is used to control the internal oscillator frequency by DC voltage input from external low pass filter (R830, C817, R833) and filter (R832, C818) is used to regulate the appropriate bias current for internal oscillator the resonate at specific dot frequency.
  • Page 14 5-4 TRANSISTOR & DIODE CIRCUIT LOCATION FUNCTION AL DESCRIPTION D101 For C103 Discharge Q101 For LED Indicator Control D411 Speed up for Q410 D412 Damping Diode Q405 HDRV Mute Control Q409 Horizontal Driver Q410 Horizontal Out Put Q413 Horizontal Linearity Correction Control Q415~ Q419 Horizontal S-Correction Control Q429~ Q433...
  • Page 15 LOCATION FUNCTION AL DESCRIPTION Q901 MOS FET for Switching Power Control Q904 Start up CKT for IC901 Q912, Q913 To Turn 6.3V Supply Off when the Off Mode is Required Q908, Q909 To Turn 16V Supply Off when the Off or Suspend Mode is Required Q408 MOS FET for B+ Control Q406, Q407...
  • Page 16: Trouble Shooting Chart

    6.TROUBLE SHOOTING CHART 6-1 NO RASTER, CRT RELATIVE CIRCUIT PROBLEMS CHECK MAIN PCB CHECK MAIN PCB POWER SUPPLY POWER SUPPLY 180V,16V,80V 60.5V, 14.5V, 80V CHECK POWER SAVING CIRCUIT, H-SYNC, V-SYNC SIGNAL CHECK THE HIGE VOLTAGE OF CHECK THE HIGE VOLTAGE CRT ABOUT 25±0.3KV OR Q409 REFER ITEM S.M.P.S.
  • Page 17 2.ABNORMAL VIDEO LEVEL ON SCREEN HECK THE VOLTAGE OF IC801 CHECK THE VOLTAGE OF IC801 PIN7,15,18,21 PIN 6, 9, 22 ABOUT 12V CHECK 12V RELATIVE CIRCUIT CHECK THE SIGNAL INPUT OF R.G.B. ABOUT 0.7Vpp CHECK SIGNAL CABLE OR INTERFACE CARD. CHECK IC801 PIN5 CHECK IC801 PIN 15 CLAMP PULSE CLAMP PULSE PI...
  • Page 18: Abnormal Display

    6-2 ABNORMAL DISPLAY 1.NO SIGNAL ON SCREEN CHECK VIDEO IC801 VCC ABOUT 12V CHECK THE 12V PIN OF P802 CONNECTOR CHECK THEOUTPUTVOLTAGE CHECK THE OUTPUT VOLTAGE OF IC801 PIN16,19,22 ABOUT 3Vpp OF IC801 PIN 18, 20, 23 ABOUT 3Vpp CHECK THE RELATIVE CIRCUIT OF IC801 CHECK THE B+ VOLTAGE OF VIDEO PCB ABOUT 80V...
  • Page 19: No Blanking

    6-3 NO BLANKING CHECK THE RELATIVE CIRCUIT OF BLANKING CHECK THE RELATIVE CIRCUIT OF CHECK THE RELATIVE CIRCUIT D424,R497,ZD404 ON MAIN PCB OF C433, D410, R635, R636, IC105 ON MAIN PCB CHECK IC801 PIN11 VIDEO PCB,CHECK CHECK IC801 PIN 16 ON VIDEO PCB, G1 RELATIVE CIRCUIT Q702,Q703,Q704,C711,C712 CHECK G1 RELATIVE CIRCUIT...
  • Page 20: Abnormal Horizontal Deflection

    6-5 ABNORMAL HORIZONTAL DEFLECTION 1. ABNORMAL HORIZONTAL WIDTH OF VIDEO READJUST H-WIDTH FUNCTION CHECK THE RELATIVE CIRCUIT CHECK THE RELATIE CIRCUIT OF Q409 OF Q404, Q405, & Q406 CHECK FBT B+ VOLTAGE CHECK FBT B+ VOLTAGE AT Q408 GATE ABOUT 60.0V AT FH=31KHz CHECK THE RELATIVE CHECK THE RELATIVE CIRCUIT OF SMPS.
  • Page 21: Abnormal Vertical Scanning

    6-6 ABNORMAL VERTICAL SCANNING 1. ABNORMAL VERTICAL SIZE READJUST V-SIZE FUNCTION READJUST V-SIZE FUNCTION VALUE VALUE CHECK THE IC601 CHECK THE IC601 PIN 7 ABOUT 40V PIN3,2 ABOUT 13V CHECK D601,D602,R606 CHECK ZD601, ZD602 R626 & SMPS R609& SMPS RELATIVE RELATIVE CIRCUIT CIRCUIT CHECK VERT.
  • Page 22: Power Supply Trouble Shooting Chart

    6-10 POWER SUPPLY TROUBLE SHOOTING CHART BEFORE CHECK SW.REG. PLEASE REFER TO THE POWER SUPPLY BLOCK DIAGRAM POWER SUPPLY OUTPUT: (A) CONSTANT OUTPUT : 6.5V, 16V, 80V, 180 V, -10V BEAD SET ABNORMAL VARIABLE OUTPUT MAKE SURE THAT CHECK AC LINE THE VARIABLE VOLT 120V OR 220V OUTPUT IS NOT SHORTED...
  • Page 23: Mechanical Of Cabinet Front Dis-Assembly

    7. MECHANICAL OF CABINET FRONT DIS-ASSEMBLY...
  • Page 24: Parts List Of Cabinet

    8. PARTS LIST OF CABINET LOCATION B793ZSNWAEN5L SPECIFICATION REMARK P993Z-3 CMB793Z5NAYL CHASSIS FOR B793Z-5L AC 1A 503503 47 SCREW FOR CRT 5A 38 8 RUBBER WASHER 7A 1 4 25 WOOD PALLET 7A 1 4 26 WOOD PALLET 11A 112500 WIRE MOUNT 11A 115 1 FBT CLIP...
  • Page 25 PARTS LIST OF CHAS LOCATION CMB793Z5NAYL SPECIFICATION REMARK AMB793Z5NAYL MAIN BOARD B793Z-5L ACE CRB793Z5NAYL CRT BOARD B793Z-5L ACER 1A 421 4128 SCREW 9A 203 9 NR901 USE 11A6033 1 PCB SUPPORT 15A5640 1 A AL GND LUG 40A 581 26702...
  • Page 26 LOCATION CMB793Z5NAYL SPECIFICATION REMARK ★ C907 67A 3022115D 220UF +-20% 450V HEC C912 65A517M103 3A6213 0.01uF + -20% Z5U 500V C917 67A 305102 3 1000 UF +-20% 16V C920 63A210J3344FC 0.33UF 630V C934 67A 215391GFK 390UF +-20% 80V ELITE C936 67A 305102 6 1000UF +-20% 35V C937...
  • Page 27 LOCATION CMB793Z5NAYL SPECIFICATION REMARK ★ NR901 61A 58 8 L NTCR15OHM+-20%2.5A UPPE P106 33A3278 7D WAFER*PLUG Insert on the contrary P402 33A3192 4 4P PLUG P901 33A8009 2 2 PIN MIN.JUMOER P903 33A8009 3 3 PIN PLUG ★ PR901 61A 52 27 4G PTCR 9OHM+-20% 220V GAO Q402 57A 734 1...
  • Page 28 95A 90 23 TIN COATED LOCATION AMB793Z5NAYL SPECIFICATION REMARK 715A1027 1 CMPC (J201) 95A 90 23 TIN COATED (R103) 61A 60239252T CFR 3.9K OHM+-5% 1/6W (R104) 61A 60268252T CFR 6.8K OHM+-5% 1/6W C101 65A 450104 7T 0.1UF +80-20% 50V Y5V C102 67A 309101 3T 100UF +-20% 16V...
  • Page 29 C454 67A 305109 7T 1UF +-20% 50V LOCATION AMB793Z5NAYL SPECIFICATION REMARK C455 67A 309109 7T 1.0UF +-20% 50V C457 65A 44447113T 470PF +-10% Z5P 50V C459 65A 444101 5T 100 PF 10% 50V Y5P C461 67A 309479 7T 4.7UF +-20% 50V C463 65A 450104 7T 0.1UF +80-20% 50V Y5V...
  • Page 30 C950 65A 1K221 2T6052 220PF/1KV Z5P+-10% LOCATION AMB793Z5NAYL SPECIFICATION REMARK C953 67A 305101 7T 100UF +-20% 50V C954 65A 450104 7T 0.1UF +80-20% 50V Y5V C955 65A517K471 1T6213 470PF/500 Z5F +-10% C956 67A 305229 7T 2.2UF +-20% 50V C957 64A 45G3330AT 0.033UF 50% 50V C958 64A176J102 1T...
  • Page 31 D927 93A 6038P52T PS102R LOCATION AMB793Z5NAYL SPECIFICATION REMARK D928 93A 6450152T SWITCHING DIODE BAV21 D929 93A 64 1152T DIODE 1N4148 D931 93A 64 1152T DIODE 1N4148 D932 93A 64 1152T DIODE 1N4148 D933 93A1060 652T F R D BYV26C FB901 71A 55 19 T FERRITE BEAD 9X3.5X0.8 FB903...
  • Page 32 J050 95A 90 23 TIN COATED LOCATION AMB793Z5NAYL SPECIFICATION REMARK J051 95A 90 23 TIN COATED J052 95A 90 23 TIN COATED J053 95A 90 23 TIN COATED J054 95A 90 23 TIN COATED J055 95A 90 23 TIN COATED J056 95A 90 23 TIN COATED...
  • Page 33 J116 95A 90 23 TIN COATED LOCATION AMB793Z5NAYL SPECIFICATION REMARK J117 95A 90 23 TIN COATED J118 95A 90 23 TIN COATED J119 95A 90 23 TIN COATED J120 95A 90 23 TIN COATED J121 95A 90 23 TIN COATED J122 95A 90 23 TIN COATED...
  • Page 34 Q904 57A 419 P T TRAN 2SC945P/NEC TAPING LOCATION AMB793Z5NAYL SPECIFICATION REMARK Q905 57A 708 1 T 2SC4002E Q906 57A 721 1 T DTC114ESA Q907 57A 419 P T TRAN 2SC945P/NEC TAPING Q912 57A 446 1 T TRAN.2SC1213AC/HITACHI Q914 57A 419 P T TRAN 2SC945P/NEC TAPING Q915 57A 619 1 T...
  • Page 35 R409 61A 17222352T CFR 22KOHM+-5% 1/4W LOCATION AMB793Z5NAYL SPECIFICATION REMARK R410 61A 60236152T CFR 360 OHM+-5% 1/6W R411 61A 17210552T CFR 1MOHM +-5% 1/4W R412 61A 60251352T CFR 51K OHM +-5% 1/6W R413 61A 21022352T MFR 22K OHM +- 1% 1/6W R414 61A 60210252T CFR 1K OHM+-5% 1/6W...
  • Page 36 R480 61A175L15052T CFR 15 OHM +-5% 1/2W LOCATION AMB793Z5NAYL SPECIFICATION REMARK R482 61A 60210252T CFR 1K OHM+-5% 1/6W R483 61A 60247152T CFR 470 OHM +-5% 1/6W R485 61A 60215152T CFR 150 OHM +-5% 1/6W R488 61A 60210052T CFR 10 OHM +-5% 1/6W R489 61A 60210052T CFR 10 OHM +-5% 1/6W...
  • Page 37 R745 61A 60218252T CFR 1.8K OHM+-5% 1/6W LOCATION AMB793Z5NAYL SPECIFICATION REMARK R901 61A175L47452T CFR 470K OHM +-5% 1/2W 10MOHM +-5% 1/2W 妮 R902 61A212Y10652T R903 61A175L10152T CFR 100 OHM +-5% 1/2W R904 61A 17210352T CFR 10KOHM +-5% 1/4W R905 61A 17210352T CFR 10KOHM +-5% 1/4W R906 61A 60233152T...
  • Page 38 PARTS LIST OF CRT PC BOARD LOCATION CRB793Z5NAYL SPECIFICATION REMARK ARB793Z5NAYL CRT BOARD B793Z-5L ACER 40A 581 26605 LABEL 87A3504 ZW CRT COCKET(QQ FOCUS) 705A792XR56 01 IC802 ASS'Y C829 67A 305470 9 47UF +-20% 100V C874 65A 2M103 3B6921 0.01UF 2KV 20% Z5U...
  • Page 39 C816 67A 309101 3T 100UF +-20% 16V C817 67A 305220 9T 22UF +-20% 100V LOCATION ARB793Z5NAYL SPECIFICATION REMARK C818 64A178J104 0T CL21X0.1UF 63V +-5% C819 65A 44210013T 10PF +-5% NPO 50V C820 65A 44210013T 10PF +-5% NPO 50V C821 64A178J104 0T CL21X0.1UF 63V +-5% C822 64A178J104 0T...
  • Page 40 FB851 71A 55 9 T CORE RF BEAD RH 3.5X6X0 J801 95A 90 23 TIN COATED LOCATION ARB793Z5NAYL SPECIFICATION REMARK J802 95A 90 23 TIN COATED J803 95A 90 23 TIN COATED J804 95A 90 23 TIN COATED J805 95A 90 23 TIN COATED J806 95A 90 23...
  • Page 41 R855 61A 17222052T CFR 22OHM+-5% 1/4W R856 61A 17222052T CFR 22OHM+-5% 1/4W LOCATION ARB793Z5NAYL SPECIFICATION REMARK R857 61A 17210552T CFR 1MOHM +-5% 1/4W R858 61A 17210552T CFR 1MOHM +-5% 1/4W R859 61A 17210552T CFR 1MOHM +-5% 1/4W R860 61A 17210252T CFR 1KOHM +-5% 1/4W R861 61A 17210252T...
  • Page 42 PARTS LIST OF IC601 ASS'Y LOCATION PART No. SPECIFICATION REMARK 5A 42501 Underlay Slice 5A 71 1 TRANSISTOR HOUSING FOR"IC601" 32A3028 8 MICA "FOR IC601" 90A 376 1 HEAT SINK M1A1730 10128 SCREW M3x10 IC601 56A 574 1 TDA9302H BY SGS PARTS LIST OF Q403/Q405/Q911/D408 ASS`Y LOCATION PART No.
  • Page 43 Q420 57A 600 14 CEPF630 BY CET PARTS LIST OF D921 ASS'Y LOCATION PART No. SPECIFICATION REMARK 90A6030 1 HEAT SINK D921 93A 6073A F R D 3A/400V 31DF4/I.R PARTS LIST OF 7" CPT TCO CRT ASS'Y LOCATION PART No. SPECIFICATION REMARK 750A57011AV...
  • Page 44: Block Diagram (Deflection)

    9. BLOCK DIAGRAM...
  • Page 45: Ic Block Diagrams

    10. IC BLOCK DIAGRAM IC101 NT6861 IC201/IC701/IC906 LM358...
  • Page 46 IC102 24C08 IC401 TDA4856 EW-OUTPUT V-SYNC INPUT VERTICAL EHT COMPENSATION V-OUTPUT V-SYNC H-PINCUSHION AND POLARITY OSCILLATOR INTEGRATOR H-SIZE AND V-SIZE H-CORNER CORRECTION AND AGC V-LINEARITY H-TRAPEZIUM V-LINEARITY BALANCE H-SIZE VIDEO V-POSITION CLAMPING V-SIZE,VOVSCN AND V-BLANK HUNLOCK OUTPUT PROTECTION OUTPUT ASYMMETRIC AND SOFT START EW-CORRECTION I C-BUS...
  • Page 48 IC402 TC4538 IC601 TDA8172/TDA9302 OUTPUT SUPPLY STAGE FLYBACK VOLTAGE SUPPLY GENERATOR INVERTING INPUT OUTPUT NON-INVERTING INPUT GROUND...
  • Page 49 IC801 TDA4887 IC802 NT6828...
  • Page 50 IC803 LM2437 IC901 3842 SET/ Vref 8 Vref RESET U.V.L.O. INTERNAL LOGLC BIAS 1/2 Vref C.S. COMP COMP. LATCH OSCILLATOR Ct/Rt...
  • Page 51 IC905 IC102 IC902 TL431 IC903 PC123/SFH615 TL431 ST24W04 PRE 1 REFERENCE CATHODE MODE/WC 2.5Vref ANODE IC904 LM7812 SERIES INPUT PASS OUTPUT ELEMENT CURRENT GENERATOR PROTECTION STARTING REFERENCE ERROR VOLTAGE AMPLIFIER CIRCUIT THERMAL PROTECTION IC906 MC33260 Feedback Input Gate Drive control Oscillator Capacitor(C Synchronization...
  • Page 52: Pcb Layout

    11 PCB LAYOUT 11-1 MAIN PCB LAYOUT (SW103) (SW104) (SW102) SW104 SW101 SW105 <SW104> <SW102> <SW103> <SW105> (R103) SW103 R105 R106 J202 GND-PIN3 GND-PIN4 R104 Q103 <R102> <R103> <R104> R423 J091 R107 (R102) (R104) <J202> LED1 (J201) LED4 J048 LED2 D929 LED3 Q401...
  • Page 53 11-2 CRT BOARD LAYOUT C843 C840 C832 C852 C864 C841 C854 FB807 IC802 C824 R855 C828 J801 J805 J808 C823 L851 C858 C851 R860 FB808 FB810 C817 C821 D857 C859 R857 IC803 D856 C857 D850 J810 R843 SG801 C820 J813 GND2 C856 C875...
  • Page 54: Schematic Diagram

    12 SCHEMATIC DIAGRAM P202 P201 CRPC-AF715/AC915 715A861-XX CMPC-AF715/AC915 715A1027-* D803 R231 R234 R820 P801 C802 1N4148 IC801 FB808 FB802 LM1269NA C815 R857 C840 H802B R807 R821 JUMPER 0.01 R805 1/4W 100V R OSD R808 ISDA FLYBACK R819 R802 C808 D856 R230 D804 C856...