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Samsung SyncMaster PX2370, Service Manual

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Samsung SyncMaster PX2370 Service Manual Download Page 26

4-1

4. Troubleshooting

4. Troubleshooting

4-1. Troubleshooting

Set custom mode as follows before beginning a repair. 

1. 

-  Resolution : 1920 X 1080 

-  H-Frequency : 67.500kHz 

-  V-Frequency : 60.000Hz
If the screen is blank, check whether the power cord is connected correctly.

2. 

The circuits to check: 

3. 

• When the raster does not appear: 

Function PBA, Main PBA, Inverter, Adaptor 

• When 5V is generated but a blank screen is displayed : Main PBA

 

• 14V is not Generated : Adaptor

“Press the MENU button and hold down the, “

4. 

 (Enter, Source)” button for more than five (5) seconds to return the monitor to 

factory mode.

Summary of Contents for SyncMaster PX2370

Page 1: ...Manual TFT LCD Monitor Contens PX2370 Refer to the service manual in the GSPN see the rear cover for the more information 1 Precautions 2 Product specifications 3 Disassembly and Reassemble 4 Troubleshooting 5 Exploded View Part List 6 Wiring Diagram ...

Page 2: ...isassembly and Assembly 3 1 3 1 Disassembly 3 1 4 Troubleshooting 4 1 4 1 Troubleshooting 4 1 4 2 When the power does Not Turn on 4 2 4 3 When the screen is blank Analog 4 4 4 4 When a blank screen is displayed Digital 4 7 4 5 When a blank screen is displayed HDMI 4 10 4 6 Error Examples and Actions 4 13 4 7 Adjustment 4 14 5 Exploded View Part List 5 1 5 1 Exploded View 5 1 5 2 Parts List 5 3 6 W...

Page 3: ...urope samsungportal com China http china samsungportal com Asia http asia samsungportal com Mideast Africa http mea samsungportal com 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 2010 Samsung Electronics Co Ltd All rights reserved Printed in Korea P N BN82 00899A 00 ...

Page 4: ...nitor off before beginning the disassembly process 2 When disassembling the monitor do not use any metal tools except for the provided jig 3 Disassemble the monitor carefully as directed in the following procedures Description Photo Screws 1 As shown in the picture stand the monitor and pull out the upper corner of the Cover Front In the same manner detach the other upper corner of the Cover Front...

Page 5: ...monitor face down on the table covered with a soft material and lift the Cover Rear 4 Remove the FFC cable LED Driver wire Tact Function wire and Touch Function wire and detach the shield 5 Remove the Filament tape and Tact Function 6 Remove the PBA bracket and Function ...

Page 6: ...3 3 3 Disassembly and Assembly Description Photo Screws 7 Lift the drive board upward and pull the upper and lower part in opposite directions until the board is detached ...

Page 7: ...3 4 3 Disassembly and Assembly Description Photo Screws 8 Remove the 2 hex cap screws and 3 screws and detach the main board The assembly is in the reverse order of disassembly ...

Page 8: ...3 5 3 Disassembly and Assembly 3 1 1 Fixing the Function PCB 설명 그림 설명 나사 1 Fix the Function PCB into the panel as indicated by the red line in the picture using the Cover Front guide ...

Page 9: ...3 6 3 Disassembly and Assembly Memo ...

Page 10: ...5 1 5 Exploded View Part List 5 Exploded View Part List 5 1 LS23WHUKF XF Exploded View T0003 M0146 M0215 M0215 M0006 M0014 M0013 M0145 M0027 ...

Page 11: ... M0014 BN94 03230K ASSY PCB MAIN OTZ W W LS23WTUKF5 EN 1 SA M0027 BN96 12829A ASSY STAND P BASE WHITE 23 PMMA 3H GY016 1 SA M0145 BN96 12843B ASSY BOARD P FUNCTION TACT WHITE Functio 1 SA M0146 BN96 12842B ASSY BOARD P FUNCTION POWER WHITE Functi 1 SA M0215 BN07 00797A LCD PANEL M230WA01 ED IN230A1 6Bit Hi 1 SA M0215 BN44 00337A INVERTER White23 w LED GH355A 12V 8 5mA 1 SA T0003 BN96 12827A ASSY C...

Page 12: ...06406A COVER STAND FRONT WHITE 23 PMMA ABS HB 1 SNA 3 BN63 06407A COVER STAND REAR WHITE 23 PMAA ABS HB B 1 SNA 3 MASB1 BN96 12834A ASSY STAND P BODY WHITE 23 PC ROSE BLACK 1 SA 4 BN61 06035A STAND BAR OUT WHITE 23 PC TP30 CLEAR 1 SNA 5 BN61 06036A STAND BAR IN WHITE 23 PC TP23 CLEAR 1 SNA 5 BN61 06037A STAND A WHITE 23 PC ROSE BLACK 1 SNA 6 BN61 02932E BRACKET STOPPER NUT ECOFIT 20 M4 D8 L12 1 SN...

Page 13: ... 3 91X 1 SNA 4 IC112 1103 001410 IC EEPROM S 24CS08AFJ TB 1GE 8Kbit 1Kx8 1 SA 4 T0085 1201 002487 IC AUDIO AMP MAX9728A QFN 12P 3x3mm DUAL 1 SA 4 1202 000104 IC VOLTAGE COMP 393 SOP 8P 150MIL DUAL 1 SA 4 T0087 1203 006118 IC POSI FIXED REG S 1172B18 U5T1G SOT 8 1 SA 4 T0087 1203 006141 IC POSI FIXED REG S 1172B33 U5T1G SOT 8 1 SA 4 1205 003201 IC BUS SWITCH TC7WB125FK SSOP 8P 2x2 3 mm 2 SA 4 1405 ...

Page 14: ...C510 3708 001150 CONNECTOR FPC FFC PIC 30P 1mm SMD A SN Y 1 SA 4 HB01A 3711 005499 HEADER BOARD TO CABLE BOX 8P 1R 1 25mm S 1 SA 4 HB01A 3711 005509 HEADER BOARD TO CABLE BOX 4P 1R 1 25mm S 1 SA 4 T0077 BN41 01341A PCB MAIN WHITE FR 4 2 MP1 0 1 6 mm 80 1 SNA 4 BN97 03927U ASSY MICOM OTZ W W M WH23U0CAA 1004 0 20 1 SNA 5 IC115 1107 001580 IC FLASH MEMORY MX25L4005 4Mbit 512Kx8 S 1 SNA 4 0403 001180...

Page 15: ...3 BN69 00617B PALLET MUSE 17 WOOD 1240 970 120 1 SNA 2 T0246 BN69 04357A CUSHION SET FX2390 EPS 16 7g l 1 SNA 0 1 BN92 05720G ASSY BOX LS23WHUKF XF 1 SNA 2 T0077 BH68 00329D LABEL BAR CODE 02 NO CE NO WT Y MPRII LA 1 SNA 2 BH68 00659F LABEL BOX 00 ALL MODEL MOJO 90G 90 95 WH 1 SNA 2 BN68 02258B LABEL STICKHIC MPX2370 CHINA MOJO 80G 5 1 SNA 2 BN69 04604A BOX 03 SET FX2390 CB A 01 SW2 ECT40 YEL 1 SN...

Page 16: ...H 1 SNA 5 BN61 06030A GUIDE LAMP WIHTE 23 PMMA GY0160 H GLOSS 1 SNA 5 BN61 06044A GUIDE POWER WHITE ABS GR70 1 SNA 5 BN64 01246A KNOB DECORATION POWER WHITE 23 PMMA ABS 1 SNA 5 BN64 01247A INLAY PLATE WHITE 23 PET SHEET T1 88 1 SNA 5 BN64 01248A KNOB CONTROL MIRROR WHITE 23 ABS HB WH1 1 SNA 5 T0174 BN97 03934Y ASSY SMD WHITE POWER BN41 0 1 SNA 6 0403 001339 DIODE ZENER UDZS6 2B 6 06 6 33V 200mW SO...

Page 17: ...OL WHITE 23 PMMA ABS HB BK23 1 SNA 5 T0174 BN97 03934Z ASSY SMD WHITE F PCB BN41 0 1 SNA 6 1405 001233 VARISTOR 30Vdc 5A 1 6x0 8x0 8mm TP 2 SA 6 R329 2007 000081 R CHIP 2 7Kohm 5 1 10W TP 1608 2 SNA 6 AAR39 2007 000123 R CHIP 1 5Kohm 5 1 10W TP 1608 2 SNA 6 AC14 2203 000189 C CER CHIP 100nF 80 20 25V Y5V TP 1608 2 SNA 6 T0313 3404 001379 SWITCH TACT 12V 50mA 250gf 4 9x4 9x1 5mm 5 SA 6 HB01A 3711 0...

Page 18: ... American National Standards Institute ANSI C101 1 Leakage Current for Appliances and Underwriters Laboratories UL Publication UL1410 59 7 With the unit completely reassembled plug the AC line cord directly into a 120V AC outlet With the unit s AC switch 4 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...

Page 19: ...move the instrument s ground lead last 1 3 Static Electricity Precautions Some semiconductor solid state devices can be easily damaged by static electricity Such components are commonly called Electrostatically Sensitive Devices ESD Examples of typical ESD are integrated circuits and some field effect transistors The following techniques will reduce the incidence of component damage caused by stat...

Page 20: ... it from being exposed 4 to moisture Otherwise it may cause a fire or electric shock Make sure to turn the power off and unplug the power cord from the outlet before repositioning the product Also check 5 the antenna cable or the external connectors if they are fully unplugged Damage to the cord may cause fire or electric shock Keep the antenna far away from any high voltage cables and install it ...

Page 21: ...1 4 1 Precautions Memo ...

Page 22: ...ble 0 2652 H X 0 2652 V pixel pitch Scanning Frequency Horizontal 30KHz 81KHz Vertical 56Hz 61Hz Display Colors 16 7 Million colors Maximum resolution Horizontal 1920 Pixels Vertical 1080 Pixels 60Hz Input Signal DVI I with HDCP HDMI Input Sync Signal Seperate H V sync Composite H V Sync on Green Level TTL level Maximum Pixel Clock rate 164 MHz Active Display Horizontal Vertical 509 184 H x 286 41...

Page 23: ...to B 2ms G to G Input Analog Digital HDMI Analog Digital HDMI Color Effect Gray Green Aqua Sepia Mode Gray Green Aqua Sepia Mode Magic Tune Premium Premium Magic Bright 5 steps Standard Game Cinema Dynamic CR Custom 7 steps Text Internet Game Sports Movie Dynamic CR Custom MagicSeries MagicBright MagicLux MagicECO MagicReturn MagicAngle MagicBright Color Tone 4 steps Cool Normal Warm Custom 4 step...

Page 24: ...ter Warranty Card Not available in all locations BN68 01146D User s Guide Monitor Driver Natural Color software MagicTune software BN59 00992A Stand Body BN96 12834A Stand Base BN96 12829A CBF SIGNAL DVI I to D sub 1 500mm 1 5M BN39 00310D Power Cord 1000mm 1 0M 3903 000384 Adaptor 12V 3A BN44 00139C Cleaning Cloth 160mm x 120mm BN63 02368B ...

Page 25: ...2 4 2 Product specifications 2 4 Accessories Sold separately Product Description Ccde No Remark DVI Cable 1 500mm 1 5M BN39 00246L Samsung Electronics Service center HDMI Cable MD39 00116A ...

Page 26: ...he screen is blank check whether the power cord is connected correctly 2 The circuits to check 3 When the raster does not appear Function PBA Main PBA Inverter Adaptor When 5V is generated but a blank screen is displayed Main PBA 14V is not Generated Adaptor Press the MENU button and hold down the 4 Enter Source button for more than five 5 seconds to return the monitor to factory mode ...

Page 27: ...he other output terminals Diagnostics IC602 IC601 IC604 CN601 Yes Check the connection status for the function ass y Yes Replace the Adaptor No Is DC12V measured at pins2 of the CN601 connector when pins 1 3 are 0V Is DC5V measured at C698 of the IC604 when pin2 is DC 12V Check the circuits related to IC604 No Yes Check and replace the Adaptor Check the circuits related to IC601 No Is DC3 3V measu...

Page 28: ...4 3 4 Troubleshooting 4 2 1 Circuit diagrams when the power does not turn on 4 2 3 1 ...

Page 29: ...119 R122 and R124 input terminals No Check the circuits related to IC200 No Check the circuits related to CN400 Do output signals appear at pins 8 to 30 of CN400 No Is DC 5V measured at pins 1 2 and 3 of CN400 Do the 3 Hsync and 4 Vsync waveforms appear at pins 66 67 of IC300 respectively 2 Do the RGB inputs appear at R119 R122 and R124 of CN101 1 Is X300 oscillating correctly Check and replace th...

Page 30: ...4 5 4 Troubleshooting 4 3 1 When a blank screen is displayed Analog 1 2 3 4 6 5 ...

Page 31: ...4 6 4 Troubleshooting 4 3 2 Waveforms when no screen is displayed Analog 1 4 3 ...

Page 32: ...gnostics CN400 CN600 CN601 CN101 IC300 X300 Yes Check and replace the circuits related to X300 No 1 Is X300 oscillating correctly 2 Do input signals appear at R101 and R108 of CN101 Check the R101 to 108 input terminals No Yes Do output signals appear at pins 8 to 30 of CN400 Check the circuits related to CN400 No Yes Is DC 5V measured at pins 1 2 and 3 of CN400 Check the 5V_PANEL signal and the B...

Page 33: ...4 8 4 Troubleshooting 4 4 1 Circuit diagrams when a blank screen is displayed Digital 1 2 4 3 ...

Page 34: ...4 9 4 Troubleshooting 4 4 2 Waveforms when a blank screen is displayed Digital 1 2 ...

Page 35: ...gnostics CN400 CN600 CN601 CN102 IC300 X300 Yes Check and replace the circuits related to X300 No 1 Is X300 oscillating correctly 2 Do input signals appear at R171 and R178 of CN102 Check the R171 to 178 input terminals No Yes Do output signals appear at pins 8 to 30 of CN400 Check the circuits related to CN400 No Yes Is DC 5V measured at pins 1 2 and 3 of CN400 Check the 5V_PANEL signal and the B...

Page 36: ...4 11 4 Troubleshooting 4 5 1 Circuit diagrams when a blank screen is displayed HDMI 1 2 4 3 ...

Page 37: ...4 12 4 Troubleshooting 4 5 2 Waveforms when a blank screen is displayed HDMI 1 2 ...

Page 38: ...full white screen is displayed regardless of the signals when turning on the monitor Cause This error occurs when only lamp power is supplied and the video signals are not input to the panel due to an LVDS cable connection error Action Replace the LVDS cable or connect the cable correctly so that the video signals can be supplied to the panel A Full White pattern is a feature of a TN panel when no...

Page 39: ... Basic Service Items to Perform after Replacing a Board 3 1 Check the PC color adjustment status 2 Input DDC input both of Analog and Digital 3 Check whether the appropriate MCU code for the model is input 4 Hard power the monitor off after entering service mode and performing a reset DDC EDIT Data Input 4 1 Use when updating the AD board code 2 Download the WinDDC program DDC Input program and He...

Page 40: ...put signal is higher than the supported frequency of the product safe mode gives users some time one minute to change the video card settings to the Recommended Mode settings Panel information Micom version Micom checksum Select the Auto Auto option Select the PixelShift option Country Scaler Vender The SVC Function OSD is made up of 103 horizontal x 82 vertical grids The SVC Function OSD consists...

Page 41: ...nel cycle will be set to 0 Service Mode features Auto Auto On Off PixelShift On Off Country English Korean Chinese Japanese HDCP HP DVI On Off Hotplug function On Off for DVI HDCP HP HDMI On Off Hotplug function On Off for DVI HotPlug Time 5 50 Default 9 0 9sec This feature lowers the level of voltage to that of Hotplug Time during communication for recognizing the recognition pin inside the monit...

Page 42: ... Before You Begin 1 Use a DDC Manager MTI 2050 version or later 2 Select the DDC file name after running the program Program WinDDC BY SAMSUNG ELEC Co Ver 4 65 12V Modify 20050425 DDC SMPX2370A ddc SMPX2370D ddc SMPX2370H ddc 3 Similarly to the previous dual model insert the cable into DDC Manager Port 1 analog and enter and check DDC Connect to parallel port DDC MANAGER Connect to MAIN board CN10...

Page 43: ...ddc icon 4 Click the Open F5 icon 5 Select a port and DDC file e g For PX2370 Analog select SMPX2370A ddc 6 Another port SMPX2370D ddc Digital 7 The other port SMPX2370H ddc HDMI 8 Click the OK button 4 5 6 8 9 Enter the serial number and press Enter For a previous version of WinDDC Analog Data Digital Data and HDMI Data should be entered separately Repeat steps 2 to 6 9 ...

Page 44: ...ing the MCU Data 1 Check the following options Manufacture MSTAR Device Type TSUMxx Communication Por t DSUB15 Analog External Memory PMC25LV040 1 2 Click the LoadFile button select an MCU code file and then click the Open O button ...

Page 45: ...4 20 4 Troubleshooting 3 Click the Auto Program button 4 When programming and verification are complete hard power the monitor off and then on again 3 ...

Page 46: ...4 21 4 Troubleshooting Inputting the Code HDCP 1 Run the service exe file 2 Click the HDCP button ...

Page 47: ...4 22 4 Troubleshooting 3 Click the HDCP Write button and select MStar_HDCPKEY 4 Inputting the HDCP key is completed ...

Page 48: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 Wiring Diagram Main Board ...

Page 49: ...onnection Main Board Function Connector CN202 LVDS CN400 Regulator X300 LED Driver CN600 Adaptor CN601 Audio Out CN700 Optical Out OP700 DVI I Jack CN101 HDMI Jack CN102 Power Connector CN1201 Scaler IC300 Flash Memory IC200 Regulator ...

Page 50: ...nce of a fault Blank Screen and No Power errors may occur CN600 Sends PWM outputs from the power board to the inverter Upon occurrence of a fault Blank Screen error may occur CN700 HDMI sound output terminal Upon occurrence of a fault An error may occur in I2S digital sound outputs inputted to the HDMI CN102 HDMI signal input terminal Upon occurrence of a fault No Digital Output No TMDS output err...

Page 51: ...6 4 6 Wiring Diagram Memo ...

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