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Philips ME5P Service Manual
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Philips ME5P Service Manual

Philips ME5P Service Manual

23" lcdtv
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ME5P 23" LCDTV
Service
Service
Service
Description
Important Safety Notice -------------------------------2
On-screen Display(OSD)------------------------ 18~29
Aging Mode ------------------------------------------- 30
Warning Message ------------------------------------ 31
Factory Mode ----------------------------------------- 32
Trouble Shooting -------------------------------------33
Panel Failure Mode ----------------------------------- 34
Wiring Diagram -------------------------------------- 35
Mechanical Instructions ------------------------ 36~37
Electrical Instructions -------------------------- 38~41
Display Adjustments -------------------------- 42~43
Safety Test Requirement ---------------------------- 44
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
Published by BCU Monitors
Printed in Suzhou
Family:
NAFTA-----ML1.2U AA
China/AP--ML1.2A AA
EU----------ML1.2E AA

TABLE OF CONTENTS

Description
Page
DDC Instructions & DDC Data ------------------ 45~52
Firmware Upgrade for CPU ---------------------- 53~54
«
Function Block Diagram---------------------------55~56
Exploded View--------------------------------------- --81
Recommended/Spare parts list------------------82~86
Different Parts List ------------------------------------ 87
Repair Tips ---------------------------------------- 88~89
Repair Flow Chart -------------------------------- 90~91
Direction for User -------------------------------92~125
SAFETY NOTICE
Copyright reserved
Subject to modification S
Horizontal frequencies
30 - 50 KHz
Sep. 07 2005
Page
GB
3122 785 15691

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  • Page 1: Table Of Contents

    ME5P 23" LCDTV Service Family: Service NAFTA-----ML1.2U AA Service China/AP--ML1.2A AA EU----------ML1.2E AA Horizontal frequencies 30 - 50 KHz TABLE OF CONTENTS Description Page Description Page DDC Instructions & DDC Data ------------------ 45~52 Important Safety Notice -------------------------------2 Firmware Upgrade for CPU ---------------------- 53~54 General Product Specification(23") ------------- 2~27...

  • Page 2: Important Safety Notice

    TO ENSURE THE CONTINUED RELIABILITY OF THIS Company** Equipment. The service procedures PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S recommended by Philips and described in this service REPLACEMENT PARTS, WHICH ARE LISTED WITH manual are effective methods of performing service THEIR PART NUMBERS IN THE PARTS LIST SECTION operations.

  • Page 3: General Product Specification(23")

    Me5P 15" & 20" GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page GENERAL PRODUCT SPECIFICATION . 23” Multifunction LCD monitor . PC 15 pins D-SUB analog interface . PC audio line in with mini-Jack . TV Tuner, S-Video, RCA AV input/output interface with R/L Audio-in .
  • Page 4 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page CONTENTS 1.0 Foreword Product profile Scanning frequencies Video dot rate Power input Power consumption Dimensions Weight Side speaker Functions 2.10 Ambient temperature Regulatory compliance 2.11 Electrical characteristics Interface signals cables User interface 3.2.1...
  • Page 5 Me5P 15" & 20" GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page Visual characteristics 4.1 Test conditions 4.2 PC resolution 4.3 Brightness 4.4 Image size 4.4.1 Actual display size 4.5 Brightness uniformity 4.6 PC white color adjustment 4.7 TV white color adjustment 4.8 TV picture centering...
  • Page 6 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page 1.0 FOREWORD This specification describes a 23” multifunction LCD Monitor, maximum resolution up to 1280x768/60Hz non-interlaced. 2.0 PRODUCT PROFILE This 23” TFT LCD monitor/TV can connect to PC ‘ s analog D-SUB and signal through DVI-D connector and it also have TV, TV’...
  • Page 7 Me5P 15" & 20" GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page 2.9 Functions : PC -15 pins D-sub analog interface with audio mini-Jack input (PC line in) -DVI-D Digital interface (Support HDCP) with RCA jack L/R audio input.
  • Page 8 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page Bolivia IEC60065 (IRAM4029) Argentin IRAM + SICM CISPR 13 , CISPR 20,IEC61000-3-2 Paragua UL6500 /IEC60065 UL6500 /IEC60065 Uruguay NOM-001-SCFI-1993(derived from IEC 60065: 5th Mexico NOM -NYCE ed.+Amd.2&3) CISPR 13 , CISPR 22...
  • Page 9 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page Bolivia IEC60065 (IRAM4029) Argentin IRAM + SICM CISPR 13 , CISPR 20,IEC61000-3-2 Paragua UL6500 /IEC60065 UL6500 /IEC60065 Uruguay NOM-001-SCFI-1993(derived from IEC 60065: 5th Mexico NOM -NYCE ed.+Amd.2&3) CISPR 13 , CISPR 22...
  • Page 10 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page Length : 1.5 M +/- 50 mm AV cable (option) Length : 1.5M +/- 50 mm Mini Jack stereo cable (option) Length : 1.5 M +/- 50 mm YPbPr cable (option) Length : 1.5M +/- 50mm...
  • Page 11 Me5P 15" & 20" GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page 3.2.1 Key Function definition: VGA mode TV/video mode Function <A> Power DC Power DC Power <B> Left Left/Volume down Left/Volume down <C> Right/Volume up Right/Volume up Right <D>...
  • Page 12 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page 1.Power : Power On/Standby 2.Numerica keys : (0~9) ,Channel setting 3.Mute : Sound mute function 4.Prev-CH : Recall previous CH 5.Menu : Main menu select and OK key 6.VOL- : Left/Volume Down : no key define 7.OK...
  • Page 13 Me5P 15" & 20" GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page Input analog D-sub connector pin assignment SIGNAL b(PC) Green Blue Self test Red GND Green GND Blue GND +5V (Supply from PC) Sync GND Bi-directional data H-sync...
  • Page 14 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page MODE NO. RESOLUTION 1024 x 768 1280X720 1280 x 768 Dot clock(MHz) 65.000 74.5 79.50 48.363kHz 44.772kHz 47.776kHz A ( us ) 20.677(1344 dots) 22.336(1664 dots) 20.931(1664 dots) B ( us ) 2.092(136 dots)
  • Page 15 Me5P 15" & 20" GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page Location: DVI IN HD IN AUDIO AUDIO COMP VIDEO PC IN (HDC AUDIO Fig. 2- COMP VIDEO AUDIO TUNER Video 2 VIDEO Video1 VIDEO AV IN 2...
  • Page 16 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page Following table is the detail TV System list. Position of sound Sound system Color Country system carrier system (MHz) FM-Stereo (A2) Korea 4.5/4.724212 NTSC FM-FM (EIA-J) NTSC Japan BTSC-stereo SAP NTSC...
  • Page 17 Me5P 15" & 20" GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page Signal source : pattern generator format as attachment. (table 1 to 6 ) Reference generator: CHROMA 2200 or 2250 3.3.3.2 TV Signal type RF signal : Aerial input / 10mV(80dBuV) Video signal : Video( RCA CVBS input) / 1Vpp (300mV-sync, 700mV-video.)
  • Page 18 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page Horizontal STATUS Vertical 230V Pulse Pulse Typical Green < 1W Stand-by No Pulse Pulse < 1W Suspend Pulse No Pulse No Pulse No Pulse < 1 W < 1 W Power switch off...
  • Page 19 Me5P 15" & 20" GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page (3) Warm up: more than 30 minutes after power on with signal supplied. (4) Ambient light: 400 ~ 600 lux. (5) Ambient temperature: 25 ± 2 °C 4.2 PC Resolution...
  • Page 20 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page 4.7 TV White color adjustment Smart picture set to personal for TV RF signal (80dBmv). Use FLUKE 54200 pattern generator with full white pattern. Use The 1931 CIE Chromaticity (color triangle) diagram (X, Y) coordinate for the screen center should be: X=0.292+/-0.030, Y=0.293+/-0.030.
  • Page 21 Me5P 15" & 20" GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page (Component and Video 2 share with same audio 5.2 Unit dimension / Weight Set dimension (incl. pedestal): 615 mm W x 234 mm H x 318 mm D Net weight : 11.2 Kg...
  • Page 22 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page : 0 to 40000 feet ( non operating ) - Altitude - Air pressure : 600 to 1100 mBAR 6.2 Transportation tests Standard UAN-D1534/01 Height Bottom 45 &other 25 cm Bottom x3...
  • Page 23 Me5P 15" & 20" GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page Serviceability The serviceability of this monitor should fulfill the requirements which are prescribed in UAW-0346 and must be checked with the check list UAT-0361. Fig 1: Brightness and Uniformity measure points Table 1.
  • Page 24 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page 495.25 499.75 494-500 501.25 505.75 500-506 507.25 511.75 506-512 513.25 517.75 512-518 519.25 523.75 518-524 525.25 529.75 524-530 531.25 535.75 530-536 537.25 541.75 536-542 543.25 547.75 542-548 549.25 553.75 548-554 555.25 559.75...
  • Page 25 Me5P 15" & 20" GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page US-Cable channel Cable Video carrier Audio carrier Range Channel 55.25 59.75 54-60 61.25 65.75 60-66 67.25 71.75 66-72 73.25 77.75 72-78 83.75 79.25 76-82 85.25 89.75 82-88 91.25...
  • Page 26 GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page 355.25 359.75 354-360 361.25 365.75 360-366 367.25 371.75 366-372 373.25 377.75 372-378 379.25 383.75 378-384 385.25 389.75 384-390 391.25 395.75 390-396 397.25 401.75 396-402 403.25 407.75 402-408 409.25 413.75 408-414 415.25 419.75...
  • Page 27 Me5P 15" & 20" GENERAL PRODUCT SPECIFICATION ME5P 23" Go to cover page 691.25 695.75 690-696 697.25 696-702 701.75 703.25 707.75 702-708 709.25 713.75 708-714 715.25 719.75 714-720 721.25 725.75 720-726 727.25 731.75 726-732 733.25 737.75 732-738 739.25 743.75 738-744 745.25...

  • Page 28: On-Screen Display(Osd)

    On Screen Display ME5P 23" Go to cover page PC MODE 1st Layer 2nd Layer 3rd Layer PICTURE COLOR TEMP NORMAL COOL W A RM BRIGHTNESS CONTRAST AUTO ADJUST IN PROGRESS STORE? MANUAL ADJUST PHASE CLOCK HORIZONTAL VERTICAL AUDIO AUTO SOUND...
  • Page 29 On Screen Display ME5P 23" Go to cover page FEATURES PICTURE FORMAT WIDESCREEN (4:3) (HD 4:3) ZOOM 14:9 ZOOM 16:9 SUBTITLE ZOOM SUPER WIDE PICTURE ALIGNMENT AUTO LOCK LOCK PROGRAM CHANGE CODE CLEAR ALL BLOCK OPTION MOVIE RATING ON/OFF ON/OFF...

  • Page 30: Aging Mode

    Aging Mode ME5P 23" Go to cover page ATTENTION ATTENTION NO VIDEO INPUT NO VIDEO INPUT Access Aging.. Mode Step 1 : Select the source "PC" and then turn off LCD-TV, and disconnect Interface Cable between Monitor and PC. Step 2 : [Push "power " button and then push the "VOL- " and "VOL+"...

  • Page 31: Warning Message

    Warning Message ME5P 23" Go to cover page CANNOT DISPLAY THIS VIDEO MODE, CHANGE COMPUTER DISPLAY INPUT TO 1024 X 768 @ 60 Hz " " NO VIDEO INPUT OSD MAIN MENU LOCKED OSD MAIN MENU UNLOCKED...

  • Page 32: Factory Mode

    INSTALL AUTO ADJUST MANUAL ADJUST ME5P NAFTA23 V0.12.6 050610C Qd123 QD23HL02 Fig.1 Use the CHNNEL- and CHNNEL+ to select the "ME5P NAFTA20 V0.45.1 050527 AU20SVGA" and then press the "VOL +" button Menu Item Description Scalar Gain R G B Scalar Gain for Normal/Warm/Cool in PC mode.

  • Page 33: Trouble Shooting

    Trouble shooting ME5P 23" Go to cover page No Power .Check the TV power cord. Disconnect the power cord from the power outlet for 10 seconds, then reinsert the plug into the outlet. Press POWER to turn on the TV again.

  • Page 34: Panel Failure Mode

    Failure Mode Of Panel ME5P 23" Go to cover page 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 Polarizer has bubbles instruction on this manual to eliminate failure by replace LCD panel.

  • Page 35: Wiring Diagram

    Wiring diagram ME5P 23" Go to cover page...

  • Page 36: Mechanical Instructions

    Mechanical Instructions ME5P 15" & 20" Go to cover page Front View 4. Remove the metal frame board - Remove the screws as shown in Fig.6-8 - Remove the metal frame board as Fig.9 Fig.1 Fig.5 Back View Fig.6 Fig.2 1.
  • Page 37 Mechanical Instructions ME5P 23" Go to cover page 6. Remove the speakers and the panel from the bezel - Remove the screws as shown in Fig.12 5. Remove all PCB - Remove the speakers from the bezel - Remove all screws as shown in Fig.10 - Remove the panel from the bezel - Remove all PCB as shown in Fig.11...

  • Page 38: Electrical Instructions

    Electrical Instructions ME5P 23" Go to cover page General points PC Input signal mode During the test and measuring, supply a distortion free AC 2.2.1 PRESET VIDEO RESOLUTION mains voltageto the apparatus via an isolated transformer with low internal resistance.
  • Page 39 Electrical Instructions ME5P 23" Go to cover page Table 3: Reading with Minolta CA-110. Item 720X576P 720X480P 720X576i 720X480i 50Hz 60Hz 50Hz 60Hz 2. Check Gain R of video SCALER GAIN, It shall be R=131 Pixel rate 27 MHz 27.027MHz 13.5MHz...
  • Page 40 Electrical Instructions ME5P 23" Go to cover page Check the digital interface cable (B) DVI Video HDCP Key Test Check the 64 gray level color poor & noise condition. 7.2.1 Use pattern generator HDTV Mode display adjust Equipment: Quantum 802R or 802BT or equivalent equipments.
  • Page 41 Electrical Instructions ME5P 23" Go to cover page 8.2 Smart picture setting Virgin Smart Smart Mode Region Model Volume Sound Picture RF Channel Format Installation PERSONAL RICH NATURE SOFT MULTIMEDIA NAFTA / Channel 2 Wide Brightness LATAM 23PF5320/28 Theater Rich...

  • Page 42: Display Adjustments

    2.1 Aim the probe CA-A30 at the center of screen as Fig. 4 MANUAL ADJUST 2.2 Remove the lens protective cover of probe CA-A30. ME5P NAFTA23 V0.12.6 050610C Qd123 QD23HL02 2.3 Set Measuring/viewing selector to Measuring position for reset analyzer. (Zero calibration) as Fig. 5 Fig.
  • Page 43 Display Adjustment ME5P 23" Go to cover page " " 2.9 Set smart picture as NORMAL Set SCALER GAIN R G B = VIDEO SCALER GAIN R G B(alignment done). The 1931 CIE chromaticity (X, Y) co-ordinates shall be: Normal/ 0.292 ±...

  • Page 44: Safety Test Requirement

    Safety Test Requirements ME5P 23" Go to cover page 3. Equipments and Connection All units that are returned for service or repair must pass the original manufactures safety tests. Safety testing requires both testing. Hipot Ground Continuity 3.1. Equipments For example :...

  • Page 45: Ddc Instructions & Ddc Data

    Go to cover page General Pin Assignment The digital only connector contains 24 signal contacts organized in DDC Data Re-programming three rows of eight contacts. Signal pin assignments are listed in the In case the DDC data memory IC or main EEPROM which storage all following table: factory settings were replaced due to a defect, the serial numbers have to be re-programmed"...
  • Page 46 Go to cover page Configuration and procedure 3. At the submenu, type the letter of your computer's hard disk drive followed by :EDID45 (for example, C:\EDID45, as shown in Fig. 7). There are 3 chips contained OSD string, serial number..etc on the circuit board, main EEPROM which storage all factory settings,OSD string.
  • Page 47 Go to cover page To Printer port DC 8~12V DC 8~12V To Monitor D-sub/DVI cable To Monitor D-sub cable Power indicator Power indicator To Printer port...
  • Page 48 DDC INSTRUCTIONS ME5P 23" Go to cover page Step 7: Exit DDC program Step 5: Write DDC data 1. Configuration should be as Fig. I. And press OK. Pull down the File menu and select Exit as shown in Fig. III.
  • Page 49 DDC Instructions ME5P 23" Go to cover page Step 3: Modify DDC data (verify EDID version, week, year) Re-programming Digital DDC IC Step 1: After initialize alignment box, connecting all cables and Click (new function) icon from the tool bar, bring up box as shown in Fig.
  • Page 50 DDC Instructions ME5P 23" Go to cover page Step 5: Write DDC data 1. Configuration should be as Fig. 24. And press OK. Fig. 24 2.Access factory. Mode Step 1 : Select the source "PC" and then turn off LCD-TV.
  • Page 51 DDC DATA ME5P 23" Go to cover page : Positive Vertical Sync. For D-SUB : Negative Horizontal Sync. ********************************************************************** EDID log file (31052005_Me5P23_A_V1) Monitor Descriptor #2 ********************************************************************** Serial Number : 00001 Vendor/Product Identification ID Manufacturer Name : PHL Monitor Descriptor #3 ID Product Code : 0000 (HEX.)
  • Page 52 DDC DATA ME5P 23" Go to cover page For DVI-D ********************************************************************** : Positive Vertical Sync. EDID log file (31052005_Me5P23_D_V1) : Positive Horizontal Sync. ********************************************************************** Detailed Timing #2 Vendor/Product Identification Pixel Clock (MHz) : 27 ID Manufacturer Name : PHL H Active (pixels)

  • Page 53: Firmware Upgrade For Cpu

    Microsoft operation system Windows 95/98/2000/XP. Click the next till complete the setup ISP Software " Easywrite " Step 5 :Copy the hex code to C:\ME5P as shown in Fig. 5 . DDC2BI_ISP TOOL (3138 106 10396) as shown in Fig. 1 170S5 Fig.
  • Page 54 Press "menu"button and bring up factory mode indication as shown in following MAIN CONTROLS 1024X768 @60HZ @60HZ PICTURE SMART PICTURE AUDIO BRIGHTNESS FEATURES CONTRAST INSTALL AUTO ADJUST MANUAL ADJUST ME5P NAFTA23 V2.00 050809C QDI23 QD23HL02...

  • Page 55: Function Block Diagram

    ME5P 23" BLOCK DIAGRAM Go to cover page Scaler AV3 audio AUDIO delay HD audio Sound decoder Tuner Audio MSP34XX audio video TPA3004D SC1-audio SC2-audio audio DVI Audio HDCP PC audio Tuner CVBS PC analog HD YPbPr SDRAM M51512L 1Mx16...
  • Page 56 ME5P 23" Go to cover page Power 24V 2.5A Inverter PFC control PWM control AC to DC Transformer AC to DC L6562 & TEA1507P & EQ40 GBU6J STPS20H100CFP STP60NM60 STP10NK80Z FILTER Photo-coupler 16V 2A TCET1103(G) Panel/scalar/Audio AC to DC MBRF10H100CT AC Inlet Protection &...

  • Page 57: Scaler Schematic Diagram & C.b

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  • Page 73: Power Schematic Diagram & C.b

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  • Page 76: Ir/Hd Schematic Diagram & C.b

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  • Page 79: Key Schematic Diagram & C.b

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  • Page 81: Exploded View

    EXPLODED VIEW ME5P 23" Go to cover page...
  • Page 82 Recommended Parts List ME5P 23" Go to cover page 7056 932222284682 IC L6562N (ST00) L 7057 932217923687 FET POW STP20NM60 (ST00) L 7061 935267356112 IC TEA1507P/N1 (PHSE) L 7062 932219657687 FET POW STP10NK80ZFP (ST00) L 7063 933953410676 TRA SIG TBC328-40...

  • Page 83: Recommended/Spare Parts List

    223878619854 CER2 0603 Y5V 16V 220N P8020 R 2452 2304 223878616641 CER2 0603 X7R 16V 22N PM10 R 0615 313811708921 HEX CODE OF F/W(ME5P 23"NAFTA) 2453 223886715181 CER1 0603 NP0 50V 180P PM5 R 223878616641 CER2 0603 X7R 16V 22N PM10 R 2305...
  • Page 84 ME5P 23" Go to cover page 2550 223878615649 CER2 0603 X7R 16V 100N PM10 R 2835 223824619863 CER2 0603 Y5V 10V 1U P8020 R 3137 232270260101 RST SM 0603 RC21 100R PM5 R 2551 223878615649 CER2 0603 X7R 16V 100N PM10 R...
  • Page 85 Spare Parts List ME5P 23" Go to cover page 3814 232270260472 RST SM 0603 RC21 4K7 PM5 R 5705 242253595853 IND FXD SM 0603 0U10 PM10 R 3516 232270260332 RST SM 0603 RC21 3K3 PM5 R 232270260102 RST SM 0603 RC21...
  • Page 86 ME5P 23" Go to cover page 2601 223886715331 CER1 0603 NP0 50V 330P PM5 R 3051 212211805971 RST SM 1206 RC1206 270K PM5 R 7062 932219657687 FET POW STP10NK80ZFP (ST00) L 2602 223886715331 CER1 0603 NP0 50V 330P PM5 R...

  • Page 87: Different Parts List

    313815641391 CARTON 0450 313815641391 CARTON 2076 223858015649 CER2 0805 X7R 50V 100N PM10 R 0615 313811708941 HEX CODE OF F/W(ME5P 23" AP) 0615 313811708941 HEX CODE OF F/W(ME5P 23" AP) 203803513301 ELCAP RGA 25V S 47U PM20 A 2082 1051...

  • Page 88: Repair Tips

    Repair Tips ME5P 23" Go to cover page 0. Warning preferably be equipped with a thermal control (soldering temperature: 225 to 250 C). All ICs and many other semi-conductors are susceptible to - The chip, once removed, must never be reused.
  • Page 89 ME5P 23" Go to cover page 3. Lead-free product identification You can identify lead-free product by Philips-lead-free logo on PCB. 4. Lead-free product repair instruction 4.1 Use only lead-free Solder Alloy 0622 149 00106(1.2mm SAC305) or 0622 149 00108(1.0mm SAC305).

  • Page 90: Repair Flow Chart

    Repair Flow Chart ME5P 23" Go to cover page 3.No picture/LED 1.No Work/LED is off is green Check if Check circuit around power switch Check if working voltage Replace power switch each regulator and is normal pin17=3.3V of 7502 eliminate short and...
  • Page 91 Repair Flow Chart ME5P 23" Go to cover page 5.no TV sound Check if tuner 1812 output 2nd IF Replace 1812 signal Chenck 1811 7. No remote function Replace one good Try another remote control remote control Check IR receiver 8.LED and...

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