Samsung 720N - SyncMaster - 17" LCD Monitor Service Manual Download Page 1

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SERVICE

Manual

LCD Monitor

Fashion Feature

LCD-Monitor

Model

720N

- SXGA Display (1280 x1024)

-Response Time: 8ms

-Connectivity: Analog (15P D-sub)

-Power Consumption: 17''(34W)

-DPMS: under 1W (230Vac)

Summary of Contents for 720N - SyncMaster - 17" LCD Monitor

Page 1: ...SERVICE Manual LCD Monitor Fashion Feature LCD Monitor Model 720N SXGA Display 1280 x1024 Response Time 8ms Connectivity Analog 15P D sub Power Consumption 17 34W DPMS under 1W 230Vac ...

Page 2: ...an 3Dong Yeongtong Gu Suwon City Gyeonggi Do Korea 443 742 Printed in Korea This Service Manual is a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable International and or domestic law ...

Page 3: ...pliances and Underwriters Laboratories UL Publication UL1410 59 7 Figure 1 1 Leakage Current Test Circuit 4 With the unit completely reassembled plug the AC line cord directly into a 120V AC outlet With the unit s AC switch first in the ON position and then OFF measure the current between a known earth ground metal water pipe conduit etc and all exposed metal parts including metal cabinets screwhe...

Page 4: ...ord from the AC source and turn the power switch ON Connect an insulation resistance meter 500 V to the blades of the AC plug The insulation resistance between each blade of the AC plug and accessible conductive parts see above should be greater than 1 megohm 6 Always connect a test instrument s ground lead to the instrument chassis ground before connecting the positive lead always remove the inst...

Page 5: ...ct it from being exposed to moisture Otherwise it may cause a fire or electric shock 5 Make sure to turn the power off and unplug the power cord from the outlet before repositioning the product Also check the antenna cable or the external connectors if they are fully unplugged Damage to the cord may cause fire or electric shock 6 Keep the antenna far away from any high voltage cables and install i...

Page 6: ...1 Precautions 1 4 Memo ...

Page 7: ...and XGA mode recommend 1 Push the OSD Menu button to open the OSD 2 Selectl language English 3 Push enter button during 5 seconds 4 See the screen flashing 3 3 DDC EDID Data Input 1 Input DDC EDID data when replacing AD PCB 2 Receive Download the proper DDC file for the model from HQ quality control department Install the below jig Figure 1 and enter the data 3 Alignments and Adjustments This sect...

Page 8: ...rogram 2 Click the Analog DVI EDID Tool icon 3 Select mode The password is 1234 Select the manufacture is Venus and the model name is Venus 17 4 Setting The password is 1234 Select the port1and the SN Leng is 22 Save the change 5 Select Write Auto Write The SN number is a 22 random numbers ...

Page 9: ...the options Manufacture MSTAR Device Type TSUM16_ROM128K_ext_flash Communication Port DSUB15 Analog External Memory PM25LV010E 2 Click Connect File button and select the MCU code 3 Click Read File button and select the MCU code 3 5 How to execute MCU Code ...

Page 10: ...3 Alignments and Adjustments 3 4 4 Click Auto Program button 5 If Program and Verify is OK turn off the hard power and than turn on again ...

Page 11: ...mal or not please do it under 16 grey scalar pattern This LCM is analog interface So if the entire screen is an abnormal color that means the problem happen in the analog circuit part if only some scale appears abnormal color that stand the problem happen in the digital circuit part If you check the H V position please use the crosshatch pattern This LCM support more than 30 timing modes if the in...

Page 12: ...voltage Check pin3 of IC802 voltage about 1V Check pin2 of IC802 voltage about 2V Check pin1 of IC802 voltage is 5 8V Check circuit if short No power Check IC802 C805 T801 Check F801 P801 D801 Check R801 R805 R822 R823 R817 Check R803 R807 R824 R825 Check R812 R816 C818 END ...

Page 13: ...ltage Check feedback circuit Check Vpin3 4 of IC801 about 6V Check Vpin1 2 of IC801 about Check pins of IC801 Check circuit if short Output Voltage Unstable Check ZD801 ZD802 ZD803 D803 D805 Check Q801 Q802 Check R810 R811 Check R801 R805 R822 R823 R817 Check C815 D806 R812 Check C815 D806 R812 END ...

Page 14: ...IC803 about 2 5V Check pin1 of IC802 voltage is 5 8V Check pin3 of IC802 voltage about 1V Check D806 C815 if short Check the C pin voltage of IC803 if 3V Check R810 R811 R818 Unstable power Change R810 R811 R818 Change IC803 Check R809 R808 R814 D809 END Change D806 C815 Change R801 R805 R822 R823 R817 ...

Page 15: ...s No Is there PWM signal on pin 4 of IC501 Check I F BD No Yes Is there High level voltage on pin4 of IC501 Check I F BD No Yes Vsense voltage 2 9V Lamp connector opened No No Are there PWM signal on pin1 pin15 of IC501 IC501 failure No Yes Pin 5 of IC501 voltage is Low level Feedback circuit failure Yes Check R523 D504 R529 D507 R528 R533 Yes Yes Pin 5 of IC501 voltage is high level voltage IC501...

Page 16: ...1 66 and 82 Of U105 Check FB103 And U102 No Yes Check pin32 49 56 and 75 Of U105 Check FB106 And U101 No Yes Check Reset pin84 Of U105 Check C144 R172 No Yes Check Crystal Pin96 Pin97 Of U105 Check X101 C153 C154 Inverter Fail MCU Fail Check R167 Q106 R108 R110 No Yes Check CCFL Enable pin85 of U105 Check pin5 of CN101 Yes No No Yes Yes ...

Page 17: ... Workmanship Yes Change LVDS Cable LVDS Cable NG Panel Fail Check C144 R172 END Yes Yes Yes No No No No Check VLCD Is 5V Check LVDS Signals No Yes Check Panel Enable Of U105 pin48 is High Check the HW Reset Of U105 pin84 No Check R168 R105 Q103 Q101 Check the pins Of U105 ...

Page 18: ...n LVDS Cable Reinsert Workmanship Yes Change LVDS Cable LVDS Cable NG Yes No Check Crystal Pin96 97 Of U105 Check X101 C153 C154 Yes No Check the communication Of U105 and U106 Check SDO SCZ SCK SDI Reset Check the pins of U105 and U106 No Yes Yes ...

Page 19: ...6 Exploded View Parts List 5 1 5 Exploded View and Parts List You can search for updated part codes through ITSELF web site URL http itself sec samsung co kr 5 1 Exploded Viewand Parts List ...

Page 20: ...5 Exploded View Parts List 5 2 Memo ...

Page 21: ...4148W F 75V 0 15A DIODES RoHS SOD 1 SA B4110 BN81 00357A DIO A02 LF 200V 1A R1 FEC RoHS 1 SA B4110 BN81 00363A DIO BAV99 350mW 70V SOT 23 PHI RoHS 1 SA B4110 BN81 00364A DIO BAV99 350mW 75V SOT 23 PEC RoHS 1 SA B4110 BN81 00358A DIO BAV99 SOT 23 INFINEON RoHS 1 SA B4110 BN81 00371A DIO BAV99 LF 350mW 70V SOT 23 FEC RoHS 1 SA B4110 BN81 00373A DIO BRDG BL4 06 BF52 LF 600V 4A FRONTIER 1 SA B4110 BN8...

Page 22: ... SA B4110 BN81 00398A ZENER BZV55 C5V6 SOD80C PHILIP S RoHS 1 SA B506D BN81 00399A MNL USER S CD LE1729 1 SA B4260 BN81 00480A XFMR 750u 1K 8 3m 113m SPW 051 DIP 1 1 SA B4260 BN81 00481A XFMR SW 121 5uH EEL19M DIP SPW 068 RoHS 1 SA B4100 BN81 00482A XSTR 2N7002 N CH SOT 23 PANJIT RoHS 1 SA B4100 BN81 00483A XSTR 2N7002 N CH FET SOT 23 PHILIPS RoH 1 SA B4100 BN81 00484A XSTR 2PC1815GR I VT PHILIPS ...

Page 23: ...7 Block Diagrams 7 1 7 Block Diagram 7 1 Power tree ...

Page 24: ...7 Block Diagrams 7 2 7 2 Mainboard part 7 3 IP Board Part SMPS Part ...

Page 25: ... part Inverter Part Vin voltage 14 2V Brightness control signal CCFL PWM Control IC IC501 DC to DC 14 2V to 5 0V MosFET U501 Transformer T501 CCFL1 CCFL1 CCFL2 CCFL2 Transformer T502 Voltage feedback Current feedback MosFET U502 ON OFF ...

Page 26: ...Memo 7 Block Diagrams 7 4 ...

Page 27: ...8 Wiring Diagram 8 1 8 Block Diagram ...

Page 28: ...Memo 8 Wiring Diagram 8 2 ...

Page 29: ...9 Schematic Diagrams 9 1 9 Schematic Diagrams This Document can not be used without Samsung s authorization 9 1 DC DC ...

Page 30: ...9 Schematic Diagrams 9 2 9 2 INPUT ...

Page 31: ...9 Schematic Diagrams 9 3 9 3 TSUM16AL ...

Page 32: ...9 Schematic Diagrams 9 4 9 4 POWER ...

Page 33: ...9 Schematic Diagrams 9 5 9 5 INVERTER ...

Page 34: ...9 Schematic Diagrams 9 6 9 6 KEYPAD ...

Page 35: ...y pressing MagicBright control buttons 1 Custom Although the values are carefully chosen by our engineers the pre configured values may not be comfortable to your eyes depending on your taste If this is the case adjust the brightness and con trast by using the OSD menu 2 Text Normal brightness For documentations or works involving heavy text 3 Internet Medium brightness For working with a mixture ...

Page 36: ... Power port Connect the power cord for your monitor to the power port on the back of the monitor 2 D sub 15 pin port Connect the signal cable to the 15 pin D sub connector on the back of your monitor 3 Kensington Lock The Kensington lock is a device used to physically fix the system when using it in a public place The locking device has to be purchased separately To get the information on using th...

Page 37: ...10 Operating Instructions and Installation 10 3 10 3 Monitor Assembly ...

Page 38: ...onitor face down on a flat surface with a cushion beneath it to protect the screen 3 Remove four screws and then remove the stand from the LCD monitor 4 Align the mounting interface Pad with the holes in the rear cover mounting pad and secure it with four screws that came with the arm type base wall mount hanger or other base 10 4 Attaching a Base ...

Page 39: ...SCREW M4 10 4 BACK COVER BKT VESA 4 ASSY FRONT BEZEL STAND_REAR 1 HINGE 1 SCREW M4 10 3 LENS 1 CONTROL BOARD 1 STAND_FRONT 1 BEZEL 1 BUTTON FUNCTION 1 ASSY PANEL 1 SCREW M3 5 4 CABLE 30P FFC BOLT 4 40 11 8 Ni 2 CHASSIS 1 PCBA I F BOARD 1 Power Board 1 SCREW M3 6 CLIP WIRE 1 SHIELING 1 Note The DIS assembly direction please following direction of arrowhead INNOLUX PANEL EN01 ...

Page 40: ...11 Disassembly and Reassembly 11 2 2 Remove the stand and front coler Description Picture Description 1 Remove 4 screw from the stand ...

Page 41: ...11 Disassembly and Reassembly 11 3 4 Disconnect cables 5 Lift up the shield and disconnect LVDS cables Description Picture Description 3 Lift the back cover and use the jig to remove the shield lamp ...

Page 42: ...11 Disassembly and Reassembly 11 4 설 설 명 사 사진 설명 Description Picture Description 6 Lift up the LCD panel 11 2 Reassembly Reassembly procedures are in the reverse order of disassembly procedures ...

Page 43: ...12 PCB Diagram 12 1 12 PCB Diagram 12 1 Main Board 12 1 1 Main Board Top Layer 12 1 2 Main Board Bottom Layer ...

Page 44: ...12 PCB Diagram 12 2 12 2 Power Board 12 2 1 Power Board TOP Layer 12 2 2 Power Board BOTTOM Layer ...

Page 45: ...is operating normally 2 1 The maximum power consumption of the panel lamps is described below It may vary depending on the panel manufacturer 17 4 7 0mA 650Vrms 4 4 55W 18 2W 2 2 The power consumption of the Panel Control board is as follows 5V 645mA 3 23W 2 3 The power consumption of the Scaler is as follows 3 3V 204mA 1 8V 145mA 0 93W 13 Circuit Descriptions 13 1 13 Circuit Descriptions 13 1 Ove...

Page 46: ... lutions using up or down scaling that are transferred to the panel in the LDVS formats 5 Crystal Oscillator Use one 14 318MHz oscilla tor externally to supply power to both MCU and Scaler at the same time 6 Scaler EEPROM I2C is a two way serial bus of two lines that supports communications across the integrated circuits as well as between FLASH and EEPROM In particular MCU TSUM16AL LF and use the...

Page 47: ...13 Circuit Descriptions 13 3 13 1 3 IP Board Part Power Schematic Diagrams ...

Page 48: ...OARD part Inverter Part Vin voltage 14 2V Brightness control signal CCFL PWM Control IC IC501 DC to DC 14 2V to 5 0V MosFET U501 Transformer T501 CCFL1 CCFL1 CCFL2 CCFL2 Transformer T502 Voltage feedback Current feedback MosFET U502 ON OFF ...

Page 49: ...hase difference COARSE This adjustment adjusts the display by tuning Video clock and PLL clock L V D S Low Voltage Differential Signaling A kind of transmission method for Digital It can be used from Main PBA to Panel DDC Display data channel It is a communication method between a Host Computer and related equipment It enables Plug and Play between PC and Monitor EDID Extended Display Identificati...

Page 50: ... provides the best quality screen for the user by allowing the computer and the monitor to exchange information automatically This monitor follows the international standard VESA DDC for the Plug Play function Resolution The number of horizontal and vertical dots used to compose the screen image is called resolution This number shows the accuracy of the display High resolution is good for performi...

Page 51: ...Analog connector on the video card Connect the signal cable to the 15 pin D sub connector on the back of your monitor 2 2 Connected to a Macintosh Connect the monitor to the Macintosh computer using the D SUB connection cable 2 3 In the case of an old model Macintosh you need to connect the monitor using a special Mac adapter 3 Turn on your computer and monitor If your monitor displays an image in...

Page 52: ...5 6 7 8 9 10 11 12 13 14 15 Red Green Blue NC DDC Return GND GND R GND G GND B NC Cable Detect NC Bi Dr Data SDA H Sync V Sync DDC Clock SCL Red Green H V Sync Blue NC DDC Return GND GND R GND G GND B NC Cable Detect NC Bi Dr Data SDA Not Used Not Used DDC Clock SCL Sync on green 14 3 Pin Assignments ...

Page 53: ...24 75Hz 640 350 70Hz 720 400 70Hz 640 480 60Hz 640 480 67Hz 640 480 72Hz 640 480 75Hz 800 600 56Hz 800 600 60Hz 800 600 72Hz 800 600 75Hz 832 624 75Hz 1024 768 60Hz 1024 768 70Hz 1024 768 75Hz 1152 864 75Hz 1152 870 75Hz 1280 1024 60Hz 1280 1024 75Hz 25 175 28 322 25 175 30 240 31 500 31 500 36 000 40 000 50 000 49 500 57 284 65 000 75 000 78 750 108 000 100 000 108 000 135 000 31 469 31 469 31 46...

Page 54: ... manual and adjust the screen as follows Horizontal Frequency The time to scan one line connecting the right edge to the left edge of the screen horizontally is called Horizontal Cycle and the inverse number of the Horizontal Cycle is called Horizontal Frequency Unit kHz Vertical Frequency Like a fluorescent lamp the screen has to repeat the same image many times per second to display an image to ...

Page 55: ...14 6 Panel Description 14 Reference Infomation 14 7 INL 631102071830r LCD PANEL 17 MT170EN01 CPT 631102070680r LCS PANEL 17 CLAA170EA07Q CPT Maker VENDOR P N PANEL_CODE PANEL_ABB STICKER_CODE Remarks ...

Page 56: ...14 Reference Infomation 14 8 Memo ...

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