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LG FLATRON F700P Service Manual
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LG FLATRON F700P Service Manual

Color monitor chassis no. : ca-140
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F700P /F720PL
3828TSL105A
FLATRON F700P / F720P

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Summary of Contents for LG FLATRON F700P

  • Page 1 F700P /F720PL 3828TSL105A FLATRON F700P / F720P...
  • Page 2 Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CA-140 MODEL: FLATRON F700P/F720P (F700PL/F720PL-AL**Q) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
  • Page 3 3,000m(china Less than5,000m(domestic)

  • Page 4: Safety Precautions

    SAFETY PRECAUTIONS SAFETY-RELATED COMPONENT WARNING! X-RADIATION There are special components used in this color monitor The only potential source of X-radiation is the picture tube. which are important for safety. These parts are marked However, when the high voltage circuitry is operating on the schematic diagram and the replacement properly there is no possibility of an X-radiation problem.

  • Page 5: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this 9. Use with this receiver only the test fixtures specified in this service manual. service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this CAUTION: Do not connect the test fixture ground strap publication.
  • Page 6 General Soldering Guidelines Replacement 1. Use a grounded-tip, low-wattage soldering iron and 1. Carefully insert the replacement IC in the circuit board. appropriate tip size and shape that will maintain tip 2. Carefully bend each IC lead against the circuit foil pad and solder it.
  • Page 7 Circuit Board Foil Repair At Other Connections Excessive heat applied to the copper foil of any printed Use the following technique to repair the defective copper circuit board will weaken the adhesive that bonds the foil pattern at connections other than IC Pins. This technique to the circuit board causing the foil to separate from or involves the installation of a jumper wire on the "lift-off"...

  • Page 8: Timing Chart

    TIMING CHART VIDEO SYNC FACTORY PRESET MODE MODE MARK MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 VESA Sync Polarity – Frequency 43.269 53.674 68.677 91.146 93.750 µs Total Period 23.112 18.631 14.561 10.971 10.666 µs Video Active Time 17.778 14.222 10.836...
  • Page 9 DISASSEMBLY 1. Carefully place the monitor on a soft cushion 4. Separate the back cover from the latch at the and stand it upright with the cabinet facing bottom of the cabinet using the jig as shown in downward. the figure. 2.
  • Page 10 ADJUSTMENT 1. Preparation for Service Adjustment 2. Adjustment by Service Hot key How to enter SVC HOT KEY GENERAL INFORMATION 1. Press Menu and OSD window will appear. 2. While OSD window is displayed, is seen on the All adjustment are thoroughly checked and corrected left bottom of OSD window.
  • Page 11 4. Distortion 10. Parallelogram Scanning frequency : All Mode (Mode 1~4) Display image : Crosshatch pattern Horizontal : 10 Row Vertical : 8 Row 11. Adjustment of white balance (Adjustment of chromaticity diagram) *(Adjustment of white balance must be made after entering Hot Key Mode and DEGAUSS.) 2.5mm, 2.5mm...
  • Page 12 11-2. Adjustment of White Balance PROCEDURE After finishing adjustment of cut off (back raster), For trained and experienced service technicians only. approve "Color(15.0) Full white pattern". Use the following procedure to correct minor color Adjust to BDRV Data = 85. purity problems: Adjust RDRV and GDRV to set chromaticity diagram at : x: 0.283 0.003...
  • Page 13 3. Adjustment Using Service software Program 2. Adjustment for White Balance and Luminance. (Adjustment Program) 1) Set the White Balance Meter. 2) Press the DEGAUSSING on the OSD menu for 1. Adjustment for Factory Mode (Preset Mode). demagnetization of the CDT. 3) Display color 0,0 pattern at Mode 4.
  • Page 14 - Adjustment and EDID Data Down in GCSC Windows EDID V1.0 User Manual 2. EDID Read & Write 1) Run WinEDID.exe Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Don’t need setup Windows 2000, XP => Need to Port Setup. This program is available to LCD Monitor only.
  • Page 20 Waveforms Q901, Drain IC901, #6...
  • Page 21 ,1,23,24...
  • Page 22 3. NO RASTER NO VIDEO (POWER INDICATOR GREEN or AMBER) CHECK AMBER TROUBLE IN POWER INDICATOR P302 SIGNAL CABLE GREEN or AMBER ? GREEN CHECK ROTATE SCREEN CONTROL SCREEN CONTROL KNOB TO CLOCKWISE KNOB OF FBT or COUNTER CLOCKWIES CHECK VOLTAGE AT D924 CATHODE (80V) TROUBLE IN PRIMARY...

  • Page 23: No Vertical Deflection

    4. NO VERTICAL DEFLECTION NO V-DEFLECTION (ONE HORIZONTAL LINE) CHECK TROUBLE IN IC601 Pin 3 (15V) ? T901 15V Line CHECK TROUBLE IN IC601 PIN 7 (40V)? T701 40V line CHECK TROUBLE IN IC601 PIN 1,2 IC401 OR R444,R445 (SAWTOOTH WAVE)? TROUBLE IN IC601, V-CIRCUIT Waveforms...
  • Page 24 5. TROUBLE IN DPM Stand-by/SUSPEND/ DPMS OFF MODE FAILURE CHECK CHECK PC, INPUT H/V SYNC SIGNAL IC401 (MICOM) (PC IS NOT GOING INTO DPM PIN 52,53 (H/V INPUT) MODE) SIGNAL? NO H/V SYNC SIGNAL CHECK TROUBLE IN IC401 PIN 45,46 X401 WAVEFORM? CHECK...
  • Page 25 6. NO DEGAUSSING NO DEGAUSSING CHECK TROUBLE IN IC401 PIN 4 (5V)? IC401 (MICOM) CHECK TROUBLE IN Q953 COLLECTOR D952 VOLTAGE (0.5V)? CHECK TROUBLE IN P902? P902 TROUBLE IN CHECK RL901 RL901? TROUBLE IN TH901, DEGAUSSING COIL - 24 -...
  • Page 28 variable R727 or C719...
  • Page 32 18. User Control Failure Check connector Ass’y. IC401 Pins 27 and 28 Check and replace function key. inputs are right at each function? Check and replace IC401. Done. 19. Missing Color Proper Video levels are Check signal generator and on P301 Pin 1, 3 and 5. signal cable.
  • Page 33 20. Visible Retrace Check white balance adjustment. G2 voltage is right? Check G2 control volume and FBT. Blank pedestal is on Check IC302 Pin 19, 20 and 21 of IC302 and related components. Check P302 Assy, Is V_FLB and DC_bias on G1 Pin at CRT socket? Done.
  • Page 36 M41QEU423X01NDDH LG-PHILIPS 95KHZ 29.1MM FLATRON...

  • Page 38: Replacement Parts List

    REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS MODEL :F700PL/ F720PL DATE:2004.08.07 MODEL :F700PL/ F720PL DATE:2004.08.07 LOC NO PART NO. DESCRIPTION/SPECIFICATON LOC NO PART NO.
  • Page 39 MODEL :F700PL/ F720PL DATE:2004.08.07 MODEL :F700PL/ F720PL DATE:2004.08.07 PART NO. DESCRIPTION/SPECIFICATON LOC NO PART NO. DESCRIPTION/SPECIFICATON LOC NO C807 181-288B MKT 100V 104JTR PHS26104 20MA .PF C807 0CE1054K638 “1 UF SRA,SS 50V M FM5 TP 5” ZD801 0DZ510009EE UDZ S 5.1B TP ROHM-K SOD323 200MW C808 0DZ510009EE UDZ S 5.1B TP ROHM-K SOD323 200MW...
  • Page 40 MODEL :F700PL/ F720PL DATE:2004.08.07 MODEL :F700PL/ F720PL DATE:2004.08.07 PART NO. DESCRIPTION/SPECIFICATON PART NO. DESCRIPTION/SPECIFICATON LOC NO LOC NO D801 0DS141489AB 1N4148 TP GRANDE DO-34 500MW 1 L804 6210TCE001H HB-1T2012-301JT CERATEC 2012MM R/TP 25NA(20V) L805 6210TCE001H HB-1T2012-301JT CERATEC 2012MM R/TP D802 0DS141489AB 1N4148 TP GRANDE DO-34 500MW 1 L807...
  • Page 41 MODEL :F700PL/ F720PL DATE:2004.08.07 MODEL :F700PL/ F720PL DATE:2004.08.07 PART NO. DESCRIPTION/SPECIFICATON PART NO. DESCRIPTION/SPECIFICATON LOC NO LOC NO Q713 0TF630001BB SGS-T(STM) IRF630MFP ST TO220F 200V R401 0RD2200Q609 220 1/4W(3 5% TA52 R402 0RD1000Q609 100 1/4W(3 5% TA52 Q714 0TR319809AA KTC3198-Y(KTC1815) TP KEC TO92 NPN R403 0RD1000Q609 100 1/4W(3 5% TA52...
  • Page 42 MODEL :F700PL/ F720PL DATE:2004.08.07 MODEL :F700PL/ F720PL DATE:2004.08.07 PART NO. DESCRIPTION/SPECIFICATON PART NO. DESCRIPTION/SPECIFICATON LOC NO LOC NO R605 0RD0331A609 3.3 OHM 1/2 W (7.0) 5% TA52 R810 0RH1004D622 1.0M 1/10W 5 D.R/TP R606 0RD1000A609 100 OHM 1/2 W (7.0) 5% TA52 R811 0RH1003D622 100K 1/10W 5 D.R/TP...
  • Page 43 MODEL :F700PL/ F720PL DATE:2004.08.07 MODEL :F700PL/ F720PL DATE:2004.08.07 LOC NO PART NO. DESCRIPTION/SPECIFICATON LOC NO PART NO. DESCRIPTION/SPECIFICATON 2A NO VENTING SC301 6620TBD003A PCS701E PARK ELEC. 10PIN 14/360 STRAIGHT SC901 6200TJB001G 02MD3P DELTA BK CB777F SG301 6918TAT007A KSA-201-MA Y&Y UNICTRON AXIAL TAPING SG302 6918TAT007A...
  • Page 46 Aug. 2004 P/NO : 3828TSL105A Printed in China...

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Flatron f720p