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Philips TFT LCD Colour Monitor Service Manual
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Philips TFT LCD Colour Monitor Service Manual

Philips TFT LCD Colour Monitor Service Manual

19” tft lcd colour monitor
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19" TFT LCD Colour Monitor
Service Manual
Description
Important Safety Notice -------------------------------------- 2
Technical Data & Power Management ------------------- 3~4
Connection to PC ---------------------------------------------- 5~7
Installation & Accessories ----------------------------------- 8
Description of Controls --------------------------------------- 9
Advanced Control of OSD ----------------------------------- 10
Clock & Phase Adjustments -------------------------------- 11~12
OSD Menu Control Level Structure ----------------------- 13
OSD Attention Signal ----------------------------------------- 14
Troubleshooting ------------------------------------------------ 15
Failure Mode of LCD Panel --------------------------------- 16
Definition of Pixel Defects ----------------------------------- 17
Wiring Diagram ------------------------------------------------ 18
Mechanical Instructions -------------------------------------- 19~24
Electrical Instructions ----------------------------------------- 25
Factory Adjustment -------------------------------------------- 26
Safety Test Requirements ----------------------------------- 27
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC
EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING.
REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINES

TABLE OF CONTENTS

Page
Description
DDC Instructions ----------------------------------------------- 28
DDC Data ------------------------------------------------------- 29~30
Repair Flow Chart --------------------------------------------- 31~33
Colour Adjustment --------------------------------------------- 34~41
Repair tips ------------------------------------------------------- 42
Block Diagram and control panel -------------------------- 43~45
Scaler board ---------------------------------------------------- 46
Power board ---------------------------------------------------- 47
Input D-SUB Diagram ---------------------------------------- 48~49
DC-DC converter Diagram ---------------------------------- 50~51
AC Adaptor Diagram ------------------------------------------ 52~53
MCU & Scaler Diagram -------------------------------------- 54~55
Inverter Diagram(Ambit) ------------------------------------- 56~57
Exploded View ------------------------------------------------- 58~60
Spare Parts List ----------------------------------------------- 61~65
General Product Specification ------------------------------ 66~77
ISP Procedure ------------------------------------------------- 78~81
Horizontal frequencies
30 - 82KHz
CD-ROM : 3136 106 10287
Service Manual : 3136 106 10288
Page

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Summary of Contents for Philips TFT LCD Colour Monitor

  • Page 1: Table Of Contents

    19” TFT LCD Colour Monitor Service Manual Horizontal frequencies 30 - 82KHz TABLE OF CONTENTS Description Page Description Page Important Safety Notice -------------------------------------- 2 DDC Instructions ----------------------------------------------- 28 Technical Data & Power Management ------------------- 3~4 DDC Data ------------------------------------------------------- 29~30 Connection to PC ---------------------------------------------- 5~7 Repair Flow Chart --------------------------------------------- 31~33 Installation &...

  • Page 2: Important Safety Notice

    REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR evaluation. Accordingly, a servicer who uses a service PART NUMBERS IN THE PARTS LIST SECTION OF THIS procedure or tool which is not recommended by Philips must SERVICE MANUAL. first satisfy himself thoroughly that neither his safety nor the safe operation of the equipment will be jeopardized by the service method selected.

  • Page 3: Technical Data & Power Management

    190B4 LCD Technical Data Technical Specifications Tilt and swivel angle of pedestal：+/- 175 Height adjustment range ：70mm Portrait display ：0° rotation counter clockwise LCD Panel Screen type ：CMO Active matrix – TFT LCD Forward / Backward ：-5° / 30° Screen dimensions ：19 inches (diagonal) AC input voltage / frequency ：90 to 264VAC / 50 or 60Hz...
  • Page 4 *Zero power consumption in OFF mode can only be achieved by disconnecting the mains cable from the monitor. ENERGY STAR is a U.S registered mark. AS AN ENERGY STAR PARTNER, PHILIPS HAS DETERMINED THAT THIS PRODUCT MEETS THE ENERGY STAR GUIDELINES FOR ENERGY EFFICIENCY.

  • Page 5: Connection To Pc

    190B4 LCD Connection to PC...
  • Page 6 190B4 LCD Connection to PC...
  • Page 7 190B4 LCD Connection to PC...

  • Page 8: Installation & Accessories

    190B4 LCD Installation & Accessories Installation Locations Avoid Heat and Extreme Cold 1. Do not store or use the LCD monitor in locations exposed to heat, direct sunlight, or extreme cold. 2. Avoid moving the LCD monitor between locations with large temperature differences. Choose a site falling with in the following temperature and humidity ranges.

  • Page 9: Description Of Controls

    190B4 LCD Description of Controls Power MENU/OK AUTO Entering OSD main control & confirming selection Up & Down 1. to select the item for screen settings through OSD menu 2. to directly access screen brightness adjustment Right & Left To adjust settings through OSD menu AUTO To optimize the screen picture quality &...

  • Page 10: Advanced Control Of Osd

    190B4 LCD Advanced control of OSD Front control panel Access Factory Mode Power MENU/OK AUTO To hold buttons (Don’t press other key at same time) then power on the monitor. Press to bring up OSD menu for confirmation as below： To Lock/Unlock OSD function The OSD function can be locked by pressing button for...

  • Page 11: Clock & Phase Adjustments

    190B4 LCD CLOCK & PHASE Adjustments Step 3： Remaining Shut Down Window on the screen, follow Due to the different quality of video signal generated from graphics cards. It is necessary to adjust CLOCK and PHASE the CLOCK and PHASE adjustment instructions for functions for the optimal video display of LCD monitor.

  • Page 12: Clock & Phase Adjustments

    190B4 LCD CLOCK & PHASE Adjustments Step 7： Press to adjust CLOCK. The picture will be jitter as following figure, adjust CLOCK and check the picture, stop at the point that without any vertical jitter bar remaining on the Step 8： Press to adjust PHASE.

  • Page 13: Osd Menu Control Level Structure

    190B4 LCD OSD Control Structure for Digital The OSD Tree for analog video signal Below is an overall view of the structure of the On-Screen Display. You can use this as reference when you want to later on work your way around the different adjustments. First Level Second Level ENGLISH...

  • Page 14: Osd Attention Signal

    190B4 LCD OSD Attention signals WAIT FOR AUTOMATIC ADJUSTMENT The monitor will detect various display situation automatically. When the monitor detects the problems, the screen will show This screen appears when you touch the button. It will the different warning signals to remind you what is happen to disappear when the monitor is properly adjusted.

  • Page 15: Troubleshooting

    190B4 LCD Trouble Shooting ˙ Push the AUTO button. TROUBLESHOOTING Vertical flicker ˙ Eliminate the vertical bars using the appears This page presents problems that can be corrected by the user. Clock Adjustment in the FIRST If the problem still exists after these possible solutions, a further Windows.

  • Page 16: Failure Mode Of Lcd Panel

    190B4 LCD Failure Mode of LCD panel Quick reference for failure mode of LCD panel This page presents problems that could be made by LCD panel. It is not necessary to repair circuit board. Simply follow the “Mechanical instruction” on this manual to eliminate failure by replace LCD panel or backlight tubes.

  • Page 17: Definition Of Pixel Defects

    In order to qualify for repair or replacement due to pixel defects defines acceptable defect levels of each type. In order to qualify during the warranty period, a TFT LCD panel in a Philips flat for repair or replacement under warranty, the number of pixel...

  • Page 18: Wiring Diagram

    190B4 LCD Wiring Diagram...

  • Page 19: Mechanical Instructions

    190B4 LCD Mechanical instructions The disassembly procedure 1. Separate the Stand a. Pull the monitor to the highest position, then lay down the front side on the soft surface. b. Press 2 hooks to remove Hinge cover, then remove 6 screws to separate the stand. 2.
  • Page 20 190B4 LCD Mechanical instructions b. Remove 2 screws (on the bottom side). c. Insert flat type of screwdriver to press 2 hooks (on the bottom side), and pull up the front bezel, then rock it left and right sides slightly to separate it. d.
  • Page 21 190B4 LCD Mechanical instructions 3. Separate the back cabinet a. Turn the set upside down, let the front side downward. b. Pull leave 2 hooks (bottom the panel ) and pull up the back cabinet c. Pull aside 4 hooks (around the Panel) and pull up the Back cabinet to separate it.
  • Page 22 190B4 LCD Mechanical instructions 4. Separate the Shield can Remove 1 screw then pull down the Shield can. 5. Separate the Power & Inverter board from panel bracket a. Disconnect the connector and cable b. Remove 4 screws...
  • Page 23 190B4 LCD Mechanical instructions c. Separate the Power & inverter board. 6. Separate the Interface board a. Disconnect the connector and cable b. Remove 4 screws c. Separate the Power & inverter board.
  • Page 24 190B4 LCD Mechanical instructions 7. Separate the Key board a. Remove 3 screws b. Separate the Power & inverter board. 8. Separate the Panel bracket a. Remove 4 screws (both sides). b. Pull down and pull up the bracket to separate the Panel and bracket.

  • Page 25: Electrical Instructions

    190B4 LCD Electrical instructions 0. General Factory preset video resolution When carry-out the electrical settings in many cases a video Dot rate H. freq V. freq Mode Resolution signal must be applied to the monitor. A computer with¡ G (MHz) (KHz) (Hz) 25.175...

  • Page 26: Factory Adjustment

    (for Color temperature gain adjustment. Use these menu items to example: Philips 190B4, C081 V1 R00 0531, which is the adjust the RGB gains of pre-amp for different color entrance of the factory adjustment menu, press button to temperatures, ranges from 0 to 255.

  • Page 27: Safety Test Requirements

    190B4 LCD Safety Test Requirements 3. Equipments and Connection All units that are returned for service or repair must pass the original manufactures safety tests. Safety testing requires both Hi-pot and Ground Continuity testing. 3.1 Equipments For example¡ G HI-POT TEST INSTRUCTION - ChenHwa 9032 PROGRAMMABLE AUTO SAFETY TESTER 1.

  • Page 28: Ddc Instructions

    190B4 LCD DDC Instructions Input : H/V SYNC Output : Video H/V SYNC Initial data Video Adjustment data Pattern Monitor Generator Signal cable Signal cable Read E PROM data Initial data / form monitor Adjust data Write to monitor RS232...

  • Page 29: Ddc Data

    190B4 LCD DDC Data EDID Version # 1, Revision # 3 DDCTest For: PHL Philips 190B ______________________________________________________________________ ______________________________________________________________________ 128 BYTES OF EDID CODE: ______________________________________________________________________ (08-09) ID Manufacturer Name __________________ = PHL (10-11) Product ID Code _______________________ = 1A08 (12-15) Last 5 Digits of Serial Number ____________...
  • Page 30 Detailed Timing / Descriptor Block 2: Monitor Serial Number: WE123456 ______________________________________________________________________ (90-107) Detailed Timing / Descriptor Block 3: Monitor Name: Philips 190B ______________________________________________________________________ (108-125) Detailed Timing / Descriptor Block 4: Monitor Range Limits: Min Vertical Freq - 56Hz Max Vertical Freq - 76Hz Min Horiz.

  • Page 31: Repair Flow Chart

    190B4 LCD Repair Flow Chart Block Diagram AC IN PI Board (Power + Inverter) Power supply board 12V DC Inverter board IF Board, 2.5V/3.3V/5V KEY Board 720Vrms + 5V Fluorescent Lamp LCD panel No power (Power indicator off) Power supply board Check 12V (Bad AC adapter) Check...
  • Page 32 190B4 LCD Repair Flow Chart No Light output Check BAD power PI Power board Board 12VDC Check video signals input Video source interface Check Check fluorescent Inverter board lamp 720VAC with load Replace inverter board Check IF Board Front control key does not work Check Front control panel...

  • Page 33: Repair Flow Chart

    190B4 LCD Repair Flow Chart Bad brightness Check BAD Inverter PI Inverter board Board output 720VAC Check fluorescent lamp Check LCD panel Bad image Check Video, fh/fv signals Check IF Board Check all connectors & flexible PCB Check LCD panel...

  • Page 34: Colour Adjustment

    190B4 LCD Colour adjustment LCD COLOUR ANALYZER – CA110/CA210 1. SUMMARY The LCD Colour Analyzer CA-110 was designed to upgrade the white-balanceprocess on production lines for colour LCD televisions and computer colour LCD panels in the colour LCD industry. The CA-110 consists of a main unit and a measuring probe.
  • Page 35 190B4 LCD Colour adjustment...
  • Page 36 190B4 LCD Colour adjustment...
  • Page 37 190B4 LCD Colour adjustment...
  • Page 38 190B4 LCD Colour adjustment...
  • Page 39 190B4 LCD Colour adjustment...
  • Page 40 - Press “0-CAL” button to starting reset analyzer. See Fig.3 to indicate colour value on the CA-110. 10. Setting pattern to full white picture. 11. Press then select Philips 190B4 C081 V1 R00 0531 by button. 12. Press to bring up submenu as following windows.
  • Page 41 190B4 LCD Colour adjustment 9300K 13. Press & buttons to select R G B. Increase/decrease value by press & buttons until the X, Y co-ordinates as below¡ G x = 0.283 ± 0.005 y = 0.297 ± 0.005 Y ≥ 160 nits 6500K 14.

  • Page 42: Repair Tips

    190B4 LCD Repair Tips 0. Warning The soldering iron to be used (approx. 30W) should preferably be equipped with a thermal control (soldering All ICs and many other semi-conductors are susceptible to temperature: 225 to 250¢ J ) electrostatic discharges (ESD). Careless handling during repair The chip, once removed, must never be reused.

  • Page 43: Block Diagram And Control Panel

    190B4 LCD Block Diagram and control panel...
  • Page 44 190B4 LCD Block Diagram and control...
  • Page 45 190B4 LCD Block Diagram and control panel...

  • Page 46: Scaler Board

    190B4 LCD Scaler board...

  • Page 47: Power Board

    190B4 LCD Power board...

  • Page 48: Input D-Sub Diagram

    48 194B4 LCD Input D-SUB Diagram...

  • Page 49: Input D-Sub Diagram

    190B4 LCD Input D-SUB Diagram IC602 pin3 IC602 pin4,5 IC602 pin6 IC602 pin8 IC602 pin9, 10 IC602 pin11...
  • Page 50 190B4 LCD DC-DC converter Diagram...

  • Page 51: Dc-Dc Converter Diagram

    190B4 LCD DC-DC converter Diagram IC251 pin1 IC251 pin3...

  • Page 52: Ac Adaptor Diagram

    190B4 LCD AC Adaptor Diagram...
  • Page 53 190B4 LCD AC Adaptor Diagram C101 264V C101 90V C209 264V C209 90V IC101 264V pin2 IC101 264V pin3 IC101 264V pin6 IC101 264V pin7 IC101 264V pin8 IC101 90V pin2 IC101 90V pin3 IC101 90V pin6 IC101 90V pin7 IC101 90V pin8 IC101 pin4 IC101 pin5...

  • Page 54: Mcu & Scaler Diagram

    190B4 LCD MCU & Scaler Diagram...

  • Page 55: Mcu & Scaler Diagram

    190B4 LCD MCU & Scaler Diagram CN401 pin8 CN401 pin9 CN401 pin10 CN401 pin11 N401 pin12 CN401 pin13 CN401 pin15 CN401 pin16 CN401 pin18 CN401 pin19 CN401 pin20 CN401 pin21 CN401 pin22 CN401 pin23 CN401 pin25 CN401 pin26 CN401 pin27 CN401 pin28 CN401 pin29 CN401 pin30...

  • Page 56: Inverter Diagram(Ambit)

    194B4 LCD Inverter Diagram (Ambit)
  • Page 57 190B4 LCD Inverter Diagram(Ambit) CN01 264V CN01 90V IC01 pin10 IC01 pin11 IC01 pin12 IC01 pin13 IC01 pin14 IC01 pin15 IC01 pin17 IC01 pin18 IC01 pin19 IC01 pin20 IC01 pin2 IC01 pin3 IC01 pin4 IC01 pin5 IC01 pin7 IC01 pin8 IC01 pin9 T01 pin1 T01 pin6...

  • Page 58: Exploded View

    190B4 LCD Exploded View...
  • Page 59 190B4 LCD Exploded View...

  • Page 60: Exploded View

    60 190B4 LCD Exploded View...

  • Page 61: Spare Parts List

    190B4 LCD Spare Parts List Philips 190B4 Service Part List - Component Date: 05/27-2003 Rev.:01 LEVEL PART NO Philips P/N DESCRIPTION UN DESIGN NO 1 ..4900400380 9965 000 19798 POWER SUPPLY+INVERTER 50W 12V 3.5A .2 ..0013393000 4822 050 13903...
  • Page 62 190B4 LCD Spare Parts List Philips 190B4 Service Part List - Component Date: 05/27-2003 Rev.:01 LEVEL PART NO Philips P/N DESCRIPTION UN DESIGN NO .2 ..211522000405 9965 000 19910 TR -40V -0.6A SOT-23 100 PCE Q02 .2 ..2310040209 9965 000 19911 PHOTO 70V 4PIN 160-320% 10.16mm...
  • Page 63 190B4 LCD Spare Parts List Philips 190B4 Service Part List - Component Date: 05/27-2003 Rev.:01 LEVEL PART NO Philips P/N DESCRIPTION UN DESIGN NO .2 ..0343471300 9965 000 19959 RES CH 1/10W 470 J 0603 PCE R420 .2 ..
  • Page 64 190B4 LCD Spare Parts List Philips 190B4 Service Part List - Assy Date: 08/26-2003 Rev.:03 Selling region Analog Dual 190B4CS/74 190B4CB/74 190B4CG/94 190B4CS/94 190B4CB/94 190B4CG/00 Philips model name Delta model name CHIMEI panel L19DAR 09ABB L19DAW 09ACB L19DBR 09AAB L19DBR 09ABB...

  • Page 65: Spare Parts List

    190B4 LCD Spare Parts List Philips 190B4 Service Part List - Assy Date: 08/26-2003 Rev.:03 EU & AP Analog Dual 190B4CS/00 190B4CB/00 190B4CG/20 190B4CS/20 190B4CB/20 L19DAR 09ABC L19DAW 09ACC L19DBR 09AAC L19DBR 09AAK L19DBR 09ABC L19DBR 09ABK L19DBW 09ACC L19DBW 09ACK...

  • Page 66: General Product Specification

    190B4 LCD General Product Specification ¢ ¨ ¢ © CONTENTS Foreword Product profile Scanning frequencies Video dot rate Power input Power consumption Dimensions Weight Functions Ambient temperature 2.10 Regulatory compliance Electrical characteristics Interface signals 3.1.1 Video Interface cable 3.2.1 DVI-D connector Cable 3.2.2 D-SUB function control 3.2.3 OSD function control Timing requirement...
  • Page 67 190B4 LCD General Product Specification ¢ ¨ ¢ © Environmental characteristics Susceptibility of display to external environment Transportation tests Display disturbances from external environment Display disturbances to external environment 6.4.1 EMI Reliability Mean time between failures Quality assurance requirements Acceptance test 9.0 Serviceability...

  • Page 68: General Product Specification

    190B4 LCD General Product Specification ¢ ¨ ¢ © Foreword This specification describes a 19” XGA multi-scan color TFT LCD monitor with max. resolution up to 1280x1024/75Hz non-interlaced. Product Profile 19 TFT LCD flat panel monitor Analog Integrated swivel base Type NR.
  • Page 69 190B4 LCD General Product Specification ¢ ¨ ¢ © Electrical Characteristics Interface signals 3.1.1 Video The input signals can be applied¡ G D-shell Analog Input signal¡ G Video, Hsync., Vsync Video ¡ G 0.7Vp-p, input impedance, 75ohm Sync. ¡ G Separate sync TTL level, input IMPEDANCE 2K2 ohm Hor.
  • Page 70 190B4 LCD General Product Specification ¢ ¨ ¢ © LANGUAGE ¡ G ENGLISH, ESPANOL, FRANCAIS, DEUTSCH, ITALIANO, ¤ ¤ » y ADJUST POSITION ¡ G HORIZONTAL, VERTICAL BRIGHTNESS & CONTRAST ¡ G Brightness and contrast adjustment. VIDEO NOISE ¡ G Phase adjustment, Clock adjustment ADJUST COLOR ¡...
  • Page 71 190B4 LCD General Product Specification ¢ ¨ ¢ © Mode No. Resolution 800x600 800x600 800x600 832x624 1024x768 Dot clock (MHz) 36.000 40.000 49.500 57.280 65.000 35.156KHz 37.879KHz 46.875KHz 49.722KHz 48.363KHz A (us) 28.44 (1024 dots) 26.40 (1056 dots) 21.333 (1056 dots) 20.11 (1152 dots) 20.677 (1344 dots) B (us)
  • Page 72 190B4 LCD General Product Specification ¢ ¨ ¢ © Power input connection Power cord length ¡ G 1.8M Power cord type ¡ G 3 leads power cord with protective earth plug. Power management Status Horizontal Vertical Power spec. Pulse Pulse An normal on Green Stand-by...
  • Page 73 190B4 LCD General Product Specification ¢ ¨ ¢ © Brightness ¡ G 250 nit typ. At maximum contrast (at center of the screen, Fig.1) Image size 4.4.1 Actual display size Brightness uniformity Set contrast at 70% and turn the brightness to get above 160 nits at center of the screen apply the Fig.1, it should comply with the following formula¡...
  • Page 74 190B4 LCD General Product Specification ¢ ¨ ¢ © Environmental Characteristics The following sections define the interference and susceptibility condition limits that might occur between external environment and the display device. Susceptibility of display to external everionment Operating - Temperature ¡...
  • Page 75 190B4 LCD General Product Specification ¢ ¨ ¢ © Display disturbances from external environment According to IEC 801-2 for ESD disturbances Display disturbances to external environment 6.4.1 EMI Reliability Mean time between failures System MTBF (Excluding the LCD panel and CCFL)¡ G 50,000 hrs CCFL MTBF ¡...
  • Page 76 190B4 LCD General Product Specification ¢ ¨ ¢ © SEPARATE SYNC. VIDEO HORIZONTAL VIDEO VERTICAL COMPOSITE SYNC. VIDEO HORIZONTAL FIG. 2 TIMING CHART-1...

  • Page 77: General Product Specification

    190B4 LCD General Product Specification ¢ ¨ ¢ © VIDEO VERTICAL FIG. 3 TIMING CHART-2...

  • Page 78: Isp Procedure

    190B4 LCD ISP Procedure for Philps 190B4 Set Monitor to “FACTORY” by push Auto + OK + DC power on. (With Sync Input) “G-Probe” program to load new software. Select device “gm2121” from Device Database.
  • Page 79 190B4 LCD ISP Procedure for Philps 190B4 Press “Connect” button In command window, key “0x22=3” to entry ISP Mode then click “Send”. Key “batch Flash2121AB14.bat” then click “Send”.
  • Page 80 190B4 LCD ISP Procedure for Philps 190B4 “flashprogram d:\v1011.hex” (your path&filename) then click “Send”. The program will show progress bar. When it finish, it will display CRC.

  • Page 81: Isp Procedure

    190B4 LCD ISP Procedure for Philps 190B4 Press “Disconnect” button. “AC power off/on” to complete procedure. Note: Use ISP tool for communication through RS232 standard Set baud rate at 115200 and select comport depend on your connection Sample: Connect to PC COM Connect to Port...

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