Philips 248C3LSB/00 Service Manual Download Page 68

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Repair Flow Chart

Power Board

Bad Power Board

Check Scaler Board

Bad Scaler Board

248C3L LCD

Summary of Contents for 248C3LSB/00

Page 1: ...TTEMPTING 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 VOL TAGES CAUTION USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING Published by Philips Consumer Lifestyle Copyright reserved Subject to modification JMar 06 2012 Scaler Diagram C B A 35 38 GB ME...

Page 2: ...ed views Use of substitute replacement parts which do not have the same specified safety characteristics may create shock fire or other hazards Under no circumstances should the original design be modified or altered without written permission from Philips Philips assumes no liability express or implied arising out of any unauthorized modification of design Servicer assumes all liability WARNING T...

Page 3: ...g Power management Mode HS YN C VSYN C Video Pwr con s Indicatio n Rec time Power On On On Active 24W typ 30W max White LED Standby Off Off Blanked 0 3W Blinking white LED 1 sec on 3sec off 3s DC Power Off ʳ ʳ N A 0 3 W LED Off ʳ PIN No SIGNAL PIN No SIGNAL 1 Red 9 DDC 3 3V or 5V 2 Green SOG 10 Logic GND 3 Blue 11 Sense GND 4 Sense GND 12 Bi directional data 5 Cable Detect GND 13 H H V sync 6 Red ...

Page 4: ...ront View Product Description Rear View ʳ ʳ ʳ ʳ Accessory Pack Unpack all the parts Connecting to Your PC 1 Connect the power cord to the back of the monitor firmly Philips has pre connected VGA cable for the first installation ʳ ...

Page 5: ...248C3L LCD 5 Troubleshootingʳ ...

Page 6: ...6 248C3L LCD Troubleshooting ...

Page 7: ... end user to adjust screen performance or select functions of the monitors directly through an on screen instruction window A user friendly on screen display interface is shown as below ʳ ʳ Basic and simple instruction on the control keys ʳ In the OSD shown above users can press buttons at the front bezel of the monitor to move the cursor to confirm the choice or change ʳ ʳ ʳ ...

Page 8: ...LCD On Screen Display The OSD Treeʳ Below is an overall view of the structure of the On Screen Display You can use this as a reference when you want to work your way around the different adjustments later on ʳ ʳ ...

Page 9: ...with Characters MERIDIAN 248C3L V2 01 2011 05 03 below OSD menu come on the Screen of the monitor Factory Mode indicator Factory Menu Cursor can move on gray color area Hot key function by pressing UP and DOWN key Simultaneously at User Mode or Factory Mode PS The Of fset R G B function can be used on reduce or eliminate snowy noise on the background when the resolution of video signal is 1280 102...

Page 10: ...ear as pixels or sub pixels that are always lit or on That is a bright dot is a sub pixel that stands out on the screen when the monitor displays a dark pattern There are the types of bright dot defects ʳ ʳ ʳ One lit red green or blue sub pixelʳ Two adjacent lit sub pixels Red Blue Purple Red Green Yellow Green Blue Cyan Light Blue Three adjacent lit sub pixels one white pixel ʳ ʳ A red or blue br...

Page 11: ...ing to the actual condition plan the disassemble layout 4 Prepare the implement equipments materials as bellow 1 Press fixture 2 working table 3 Screw driver 4 knife 1 5 glove 6 cleaning cloth 7 ESD protection item picture Operation Tool Notes 1 Disassemble the base and hinge Glove 2 Disassemble the RC cover from RC Glove 3 Unlock the hexagonal screw or HDMI screw and RC screw Screw driver hexagon...

Page 12: ...nstruction 4 Disassemble the RC to the BZL Glove 5 Unlock 6 screws Disassemble the hinge and RC Glove 6 Disassemble the wire from panel and PCBA Glove 7 Disassemble the C B cable from PCBA Disassemble the C B Ε LED boardΕ Glove ...

Page 13: ...C3L LCD 13 Mechanical Instruction 8 Disassemble the LVDS cable and AL tape from panel and BKT Glove 9 Unlock 6 screws Screw driver PCBA screw 7 1Kg Glove 10 Disassemble the LED board and driver board Glove ...

Page 14: ... adjustment There are six factory preset white color 11500K 9300K 8200K 7500K 6500K sRGB 5000K Align by Philips PerfecTune also called FGA function Apply full white pattern with brightness in 100 position and the contrast control at 50 position The 1931 CIE Chromaticity color triangle diagram x y coordinate for the screen center should be Product specification CIE coordinates x y 11500K x 0 270 0 ...

Page 15: ...248C3L LCD 15 FAQs Frequently Asked Questions ...

Page 16: ...16 248C3L LCD FAQs Frequently Asked Questions ...

Page 17: ...male with DDC2B pin assignments Blue connector thumb operated jack screws 2 2 DVI Cable The input signals are applied to the display through DVI D cable Length 1 8 M 50 mm Connector type DVI D male with DDC 2B pin assignments White connector thumb operated jackscrews With transplant pin protective cover 3 Timing requirement 3 1 Factory Preset mode definition 3 1 1 Perfect FOS while presenting thos...

Page 18: ...0 02 y 0 314 0 02 PerfectuneII 6500K sRGB x 0 313 0 02 y 0 329 0 02 PerfectuneII sRGB x 0 313 0 02 y 0 329 0 02 PerfectuneII 5000K x 0 345 0 02 y 0 357 0 02 PerfectuneII Production alignment spec CIE coordinates x y 11500K x 0 270 0 006 y 0 281 0 006 PerfectuneII 9300K x 0 283 0 006 y 0 297 0 006 PerfectuneII 8200K x 0 291 0 006 y 0 306 0 006 PerfectuneII 7500K x 0 298 0 006 y 0 314 0 006 Perfectu...

Page 19: ...248C3L LCD 19 Service tool Hardware PCM code 12NC 5E L8215 001 996510019769 ...

Page 20: ...20 248C3L LCD Service tool Software FW writing tool Easy Writer V4 54 DDC writing tool Q EDID V30 ...

Page 21: ... Association VESA Extended Display Identification Data EDID information may be also obtained from VESA Configuration and procedure PI EDID The software is provided by IMS to upgrade the firmware of CPU PI EDID Tools is for the interface between Parallel Port of PC and 15 pin D SUB connector of Monitor It is a windows based program which cannot be run in MS DOS System and equipment requirements 1 A...

Page 22: ... Ground 2 Ground 12 Lane3 N 3 Lane0 N 13 Ground 4 Lane1 P 14 EDID WP 5 Ground 15 AUX_CH P 6 Lane1 N 16 Ground 7 Lane2 P 17 AUX_CH N 8 Ground 18 Hot Plug Detect 9 Lane2 N 19 Return 10 Lane3 P 20 DP_PWR PIN No SIGNAL PIN No SIGNAL 1 Red 9 DDC 3 3V or 5V 2 Green SOG 10 Logic GND 3 Blue 11 Sense GND 4 Sense GND 12 Bi directional data 5 Cable Detect GND 13 H H V sync 6 Red GND 14 V sync 7 Green GND 15 ...

Page 23: ...248C3L LCD 23 DDC Instructions 6 Setup the Philips IMS EDID Tools program Step 1 Open Q EDID V030 Software into your folder as shown in Fig 3 and Fig 4 ˤ ˆ ˁ Fig 3 Fig 4 ...

Page 24: ...24 248C3L LCD DDC Instructions Step 2 Press Open File then choose 248C3L DDC FILE Fig 5 ...

Page 25: ...248C3L LCD 25 DDC Instructions Step 3 Load DDC file success as shown in Fig 6 Fig Step 4 update Serial number and press enter to correct S N number shown as Fig 7 Fig 7 ...

Page 26: ...26 248C3L LCD DDC Instructions Step 5 Press RUN to write EDID and serial number shown as Fig 8 Fig 8 Step 6 EDID and serial number update success shown as Fig 9 Fig 9 ...

Page 27: ...27 DDC Instructions 8 Press Read EDID to read EDID and serial number shown as Fig 10 and check Serial number is the same as we set Note If not the same please rewrite EDID S N again Fig 10 Serial Number Definition ...

Page 28: ...e RGB color display Standard Default Color Space Yes Features Preferred Timing In first detailed block Features GTF support No DPMS Features Stand by Yes DPMS Features Suspend Yes DPMS Features Active Off Yes x Basic Display Parameters Features x Color Characteristics Red x 0 639648 Red y 0 330078 Green x 0 299805 Green y 0 599609 Blue x 0 150391 Blue y 5 95703e 002 White x 0 313477 White y 0 3291...

Page 29: ... Display Type RGB color display Standard Default Color Space Yes Features Preferred Timing In first detailed block Features GTF support No DPMS Features Stand by Yes DPMS Features Suspend Yes DPMS Features Active Off Yes x Basic Display Parameters Features x Color Characteristics Red x 0 639648 Red y 0 330078 Green x 0 299805 Green y 0 599609 Blue x 0 150391 Blue y 5 95703e 002 White x 0 313477 Wh...

Page 30: ...3L LCD Firmware Upgrade for CPU Step 1 Install Port95nt exe Re star computer Step 2 Double click NOVATEK Tool Option 1 Choose MYSON 2 IIC Speed 1000 3 Press confirm change Step 3 Press Load File and choose hex ...

Page 31: ...248C3L LCD 31 Firmware Upgrade for CPU Step 4 Press Auto to upgrade FW Step 5 Upgrade OK ...

Page 32: ... Foreign material inside polarizer It shows liner or dot shape Concentric circle formed Bottom back light of LCD is brighter than normal Back light un uniformity Backlight has foreign material Black or white color liner or circular type 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...

Page 33: ...248C3L LCD 33 LULQJ LDJUDP ...

Page 34: ...34 248C3L LCD ORFN LDJUDP ...

Page 35: ... 1 G ND 2 I O 3 4 VDD 5 I O 4 6 I O 2 3 C 3 N C _ 4 7P C R 9 1K J R 18 12K J T P 5 R 30 100 J R 12 150 J R 26 200 J R 17 100 J C 12 0 0 4 7U 16V R 4 75 J L1 Z60 U1 AZ C 199 04S I O 1 1 G ND 2 I O 3 4 VDD 5 I O 4 6 I O 2 3 C 14 N C _ 0 1 U Z T P 10 R 19 12K J R 29 200 J R 23 100 F R 15 150 J R 31 10K J R 24 47 J R 5 75 J DN1 B AV70LT 1G A1 A2 J T P 6 C 6 47P J T P 2 R 2 75 J C 17 2 2 P J R 32 10K J...

Page 36: ... 5 9 1 0 0 J R 7 0 N C _ 4 7 K J R 6 6 1 M J C 4 8 N C _ 1 U K C 3 3 4 7 U K C 4 6 3 3 P J L 8 Z 2 2 0 L 10 Z 2 2 0 C 4 1 4 7 U K R 6 1 1 0 0 J U 1 0 P M2 5 L V 0 2 0 1 0 0 S C E C E 1 S O 2 W P 3 VS S 4 S I 5 S C K 6 HOLD 7 VC C 8 R 6 5 4 7 K J C 2 9 0 1 U Z C 4 5 N C _ 0 1 U Z R 6 9 4 7 K J L 7 Z 2 2 0 C 3 7 N C _ 0 1 U Z U8 NT68669U R S T B 1 DVDD 2 DG ND 3 R X2 4 R X2 5 AVC C 6 R X1 7 R X1 8 A...

Page 37: ...2 HOLE V8 1 2 3 4 5 6 7 8 9 R 106 100K J T P 40 T P 42 T P 47 T P 36 R 107 20K U11 N C _ G 697L483T 1UF R E S E T 1 VC C 2 G ND 3 C D 5 NC 4 T P 52 F id u cia l_Ma rk Q6 2N3904S B E C C 61 N C _ 4 7P J F iducia l_Ma rk T P 49 T P 48 T P 37 H4 HOLE V8 1 2 3 4 5 6 7 8 9 T P 41 J 6 2K K 2085030 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 G 1 G...

Page 38: ...S calar Diagram C B A 38 248C3L LCD ...

Page 39: ...2 3 3 4 4 G 1 G 1 G 2 G 2 C 858 2 2 U K T P 871 T P 861 C 873 0 47U K R 841 0 F C N 853 2K 62285106 1 2 3 4 5 6 C 802 220U 1 2 C N 852 2K 61185106 1 2 3 4 5 6 R 855 20K J C 852 47U 63V 1 2 C N 868 2K 62285106 1 2 3 4 5 6 T P 872 R 875 1K R 890 0 F C 856 0 47U K R 810 0 F T P 865 R 865 1K C 853 47U 63V 1 2 T P 862 T P 852 C 804 0 1U 50V T P 873 R 823 0 F R 864 0 33 F R 858 191K F R 859 33 2K R 883 ...

Page 40: ...LED Driver Diagram C B A 40 248C3L LCD ...

Page 41: ...G2 S5 1 1 White 2KV LED7 WHITE A K C1 0 1U Z R5 10K J R13 150 R3 10K J R14 1K J R1 4 7K J TP6 S4 1 1 C9 4 7U K TP5 C8 0 1U Z White 2KV LED8 WHITE A K R6 150 C11 0 022U K White 2KV LED6 WHITE A K R2 4 7K J TP2 White 2KV LED5 WHITE A K OP OP3 R7 150 OP OP2 J1 2KK2261005 1 1 2 2 3 3 4 4 5 5 G1 G1 G2 G2 TP7 OP OP1 R8 150 White 2KV LED4 WHITE A K S2 1 1 White 2KV LED3 WHITE A K U2 RT9193 33PB VOUT 5 VI...

Page 42: ...Control Diagram C B A 42 248C3L LCD ...

Page 43: ...3 NC_75 R2 75 R1 75 C1 NC_220P J White 2KV LED2 WHITE A K OP3 J1 2KK2261005 1 1 2 2 3 3 4 4 5 5 G1 G1 G2 G2 OP1 OP2 White 2KV LED4 NC_WHITE A K White 2KV LED1 WHITE A K TP1 NC_ZD1 PZU6 2B2 A K White 2KV LED3 NC_WHITE A K LED Diagram C B A 248C3L LCD 43 ...

Page 44: ...LED Diagram C B A 44 248C3L LCD ...

Page 45: ...8 248C3L LCD 45 General Product Specification M3 248C3 GENERAL PRODUCT SPECIFICATION Issued by Argent Chan HH Chi Revision History Ver Date yy mm dd Author Brief Description 0 1 2011 01 13 UC Hsu Initial version Blue Changes than last version Red TBD 248C3 Series Quick Specification table ˇˋ ˆ ˆ ˁ ...

Page 46: ...ING 10 3 5 VERTICAL SCANNING 10 3 6 POWER INPUT CONNECTION 10 3 7 POWER MANAGEMENT 10 3 8 VGA DISPLAY IDENTIFICATION 10 3 9 DVI DISPLAY IDENTIFICATION 10 3 10 USB SUPPORT OPTION REFER TO QUICK SPECIFICATION TABLE 10 3 11 DDC CI SUPPORT AND SMART MANAGE CONTROL 10 3 12 PIVOT FUNCTION OPTION REFER TO QUICK SPECIFICATION TABLE 11 3 13 HOT KEY DEFINITION 11 3 14 SMART IMAGE 11 3 15 PERFECTTUNE II FORM...

Page 47: ... 5 6 COLOR FOR RESIN PAINT 14 5 7 FIRE ENCLOSURE REQUEST 14 5 8 RESINS 14 5 9 IF PAINT IS USED 14 5 10 PLASTIC MOLD TOOLING 14 5 11 PLASTICS FLAMMABILITY 15 5 12 TEXTURE GLOSSING OF HOUSING 15 5 13 TILT AND SWIVEL BASE 15 5 14 KENSINGTON LOCK 15 5 15 PRODUCT DIMENSION WEIGHT REFER TO PHILIPS APPROVED SHT 191 SHT560 15 5 16 TRANSPORTATION 16 5 17 PALLET CONTAINER LOADING REFER TO PHILIPS APPROVED S...

Page 48: ...0 5 Horizontal Frequency Range 30 83 KHz 6 Vertical Frequency Range 56 76Hz 7 Monitor Name 13 characters max Philips 248CL LCD Suppliers to offer panel specifications Panel incoming specification Follow Philips specification WLED CMI M236HGE L10 Type NR CMI M236HGE L10 Resolution 1920 x 1080 FHD Outline dimensions 544 8 H x 320 5 V x 11 4 D mm Pixel Pitch mm 0 271mm x 0 271mm Color pixel arrangeme...

Page 49: ...VAC 3 Electrical characteristics Scaler should be capable of below items 1 Scaler must support color engine for Image enhancement feature SmartImage 2 Scaler must have enough memory to support PerfecTune feature and Philips OSD 3 Scaler must support SmartContras 50M 1 SCR preferred 4 VGA signal Auto adjustment Monitor automatically adjusts and optimizes resolution and frequency based on input sign...

Page 50: ...I D Digital 248C3L only Input signal Single TMDS link Three channels RX0 RX1 RX2 3 HDMI 248C3LH only Follow HDMI 1 3 specification 4 HDMI audio out headphone 248C3LH Only Stereo 50mVrms for headphone of 32 and 0 5 Vrms for high impedance 3 1 Interface 3 1 1 D Sub Cable Length Please refer to M3 cable bundle summary file Fix with monitor when packing with transplant pin protective cover Connector t...

Page 51: ...ssignments White connector thumb operated jackscrews With transplant pin protective cover Pin Assignment Pin No Description 1 T M D S data2 2 T M D S data2 3 T M D S data2 shield 4 No Connect 5 No Connect 6 DDC clock 7 DDC data 8 No Connect 9 T M D S data1 10 T M D S data1 11 T M D S data1 shield 12 No Connect 13 No Connect 14 5V Power 15 Ground for 5V 16 Hot plug detect 17 T M D S data0 18 T M D ...

Page 52: ...S Clock 13 CEC 14 Reserved HDMI 1 0 1 3c HEC Data Optional HDMI 1 4 with Ethernet 15 SCL I C Serial Clock for DDC 16 SDA I C Serial Data Line for DDC 17 DDC CEC HEC Ground 18 5 V Power max 50 mA 19 Hot Plug Detect All versions and HEC Data Optional HDMI 1 4 with Ethernet 3 2 Timing requirement Factory Preset mode definition 1 Perfect FOS while presenting those timings 2 Will specify those timing i...

Page 53: ...ver H W limitation do not support 1 Factory preset modes and preset modes are defined in the enclosed timing table file ˇˋ ˆ ʻ ʼʳ ʳ 3 3 OSD Keypad functions ITEM 1 OSD keypad definition ˠˆʳˢ ʳ ʳ Reset No Exit Yes Auto adjustment for displaying timing mode and recall factory preset 2 OSD Translation ˢ ˠˆ 8 LANGUAGES w o Turkish 3 Power On logo ˣ ˌ ˋ ˁ Power On Logo Power On Show up Philips logo 3 s...

Page 54: ...e 24W typ 30W max EPA5 0 20W White LED Standby Sleep mode Off Off Blanked 0 3W typ Blinking white LED Period 1sec on 3sec off 3 s DC Power Off N A 0 3W typ LED Off 3 8 VGA Display identification In accordance with VESA Display Channel Standard Ver 1 0 and DDC 2B capability 3 9 DVI Display identification In accordance with DVI requirement DDWG digital Visual Interface revision 1 0 use DDC 2B DDC CI...

Page 55: ...elta E 2 5 3 16 PowerSensor option refer to Quick specification table not require in 248C3L H ˣ ʳ ʳ ʳ 3 17 Smart Power option not require in 248C3L H To reduce the power by adjusting backlight contrast and color Algorithm is provided by Supplier 3 18 SmartResponse To enhance the Response time when Gary to Gary When SmartResponse on Response time 2 mSec typ OD will only work after 3 frames pass to ...

Page 56: ...color triangle diagram x y coordinate for the screen center should be Product specification CIE coordinates x y 11500K x 0 270 0 02 y 0 281 0 02 PerfecTune II 9300K x 0 283 0 02 y 0 297 0 02 PerfecTune II 8200K x 0 291 0 02 y 0 306 0 02 PerfecTune II 7500K x 0 298 0 02 y 0 314 0 02 PerfecTune II 6500K sRGB x 0 313 0 02 y 0 329 0 02 PerfecTune II sRGB x 0 313 0 02 y 0 329 0 02 PerfecTune II 5000K x...

Page 57: ...Wide 16 9 LCD Monitor 2011 05 02 PHILIPS 13 of 18 248C3L LCD 57 General Product Specification Quality Inspection specification CIE coordinates x y 9300K x 0 283 0 015 y 0 297 0 015 6500K sRGB x 0 313 0 015 y 0 329 0 015 sRGB x 0 313 0 015 y 0 329 0 015 ...

Page 58: ... for resin paint Per Philips make up sheet 5 7 Fire enclosure request Shielding Cover should fulfill international standard 5 8 Resins x RoHS required x WEEE required x Resin type selection refer to Project Book Section 7 2 Plastic material 5 9 If paint is used x RoHS required x WEEE require x If new painting type need to implement refer to UN D 1235 5 10 Plastic mold tooling x Tooling to be desig...

Page 59: ...ng x The texture area and texture no should follow Philips make up sheet x The exterior surfaces shall have a uniform texture x Philips must approve the mold texturing x Detail document for texture refer to UN D249 UN D 600 x Glossy surface 80 gloss units 5 13 Tilt and swivel base x Tilt angle 5 q 2 0 q forward 20 q 0 3 q backward x Swivel angle nil x High Adjustment nil x Portrait Display nil 5 1...

Page 60: ...rial x The doggy hole is requested 5 16 2 Transportation Test Overall tests refer to UAN D1534 00 01 02 Vibration drop test should be performed at ambient temperature 20 C to 23o C and relative humidity 40 to 65 A Transportation test specification for all regions x Package test 1 Random Vibration test 2 Drop test 3 Cold Drop test for design reference x Un package test 1 Half sine shock test non op...

Page 61: ...quest in different transportation for all regions except EU UK SHT560 A Air shipment WW A L1090 W978 20 40 40 HQ Container loading WW 672 1344 1488 B Truck shipment Stacking request in different transportation for EU UK SHT560 A Land 45 Truck and Trailer 800X1200mm pallet for EU Nil B Land 45 Truck and Trailer 1000X1200mm pallet for UK 1456 6 Environmental characteristics The following sections de...

Page 62: ...ssure 600 1100 mBAR Storage Temperature 20 to 60 degree C Humidity 95 max Altitude 0 12192m Air pressure 300 1100 mBAR Note recommend at 5 to 35qC Humidity less than 60 6 2 Transportation tests Refer to 5 15 2 6 3 Display disturbances from external environment According to IEC 801 2 for ESD disturbances 6 4 Display disturbances to external environment ...

Page 63: ...248C3L LCD 63 Exploded View ...

Page 64: ...02 002 V V Accessory Styling CUSHION BOTTOM CUSHION TOP CARTON 120 Model 2 4 8 C 3 L S B 0 0 2 4 8 C 3 L S B 0 1 2 4 8 C 3 L S B 0 0 A P 2 4 8 C 3 L S B 7 5 2 4 8 C 3 L S B 9 3 2 4 8 C 3 L S B 2 5 Accessory Styling location Description PCM code Philips 12NC CMI CMI CMI CMI CMI CMI CMI CMI CMI 4J 1GV01 001 V V V V V V 4J 1GV01 002 V V V V V V V V V 210 CD M3248CLE1Q 248C3L 248C3LH 5B 1GV01 001 V V ...

Page 65: ... BOARD ASS Y 3 5E 1GV33 001 LED DRIVER BD ASS Y 4 5E 1GV03 001 under BZL 6K 1GV07 001 ASSY CTRL BD under BZL assy_FRONT BEZEL ASS Y Black with CTRL LED BD 5 5E 1GV26 001 under BZL 6K 1GV07 001 LED BD ASS Y under BZL assy_FRONT BEZEL ASS Y Black with CTRL LED BD 248C3L LCD 65 Panel PCBA photos ...

Page 66: ...s heat applied to each terminal see Fig 1 B Remove the excess solder on the solder lands by means of litz wire or a solder sucker see Fig 1C While holding the SMD with a pair of tweezers take it off gently using the soldering iron s heat applied to each terminal see Fig 1 B Remove the excess solder on the solder lands by means of litz wire or a solder sucker see Fig 1C 1 3 Caution on removal When ...

Page 67: ...r some hours around 90 for drying Take attention for ESD protection 5 Rework on BGA Ball Grid Array ICs General Although LF BGA assembly yields are very high there may still be a requirement for component rework By rework we mean the process of removing the component from the PWB and replacing it with a new component If an LF BGA is removed from a P WB the solder balls of the component are deforme...

Page 68: ...Repair Flow Chart Power Board Bad Power Board OK NG OK OK Check Scaler Board Bad Scaler Board OK OK 68 248C3L LCD ...

Page 69: ...Repair Flow Chart Check Power Board OK Check LCD Panel OK NO OK Control Board OK OK Board 18V 12V 5V DC 248C3L LCD 69 ...

Page 70: ...Continuity tested as follows Condition Hi Pot Test for products where the mains input is 220V AC Hi Pot Test for products where the mains input is 110V AC Ground Continuity Test requirement Test voltage 2820VDC 2000VAC 1700VDC 1200VAC Test time 3 seconds 1 seconds Trip current Tester Set at 100uA for Max limit Set at 0 1uA for Min limit 5mA Ramp time Tester Set at 2 seconds 刈 Test current 25A AC T...

Page 71: ...in order to make the touch function more sensitive But due to the Bezel and CTRL BD are hard to separate we suggest that for service repair please replace the whole module When received the monitor either Bezel or CTRL BD is out of function please repair the whole module Module P N is base on spare parts list of service manual and styling sheet ...

Page 72: ...nu Down Power buttons at the same time to turn on monitor Step 2 Move cursor into Burn in Mode and select Yes to enable burn in mode Move cursor into Auto Level and press Menu button It will show ok meaning AUTO COLOR OK Step 3 Before you leave the factory mode please remember to move cursor into Burn in Mode and select No ...

Page 73: ...248C3L LCD 73 Philips M3 M4 Series User reset SOP Step 1 Turn on Monitor and Press Menu button to enter into user mode Choose Setup Reset Yes Step 2 Run Auto Adjustment ...

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