Samsung PX2370 Service Manual
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Samsung PX2370 Service Manual

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SERVICE
TFT-LCD Monitor
PX2370
Refer to the service manual in the GSPN (see the rear cover) for the more information.
LCD-Monitor
Chassis
: LS23WHU
Model
: PX2370
Manual
1. Precautions
2. Product specifications
3. Disassembly and Reassemble
4. Troubleshooting
5. Exploded View & Part List
6. Wiring Diagram
Contens

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Summary of Contents for Samsung PX2370

  • Page 1: Service Manual

    LCD-Monitor Chassis : LS23WHU Model : PX2370 SERVICE Manual TFT-LCD Monitor Contens 1. Precautions 2. Product specifications 3. Disassembly and Reassemble 4. Troubleshooting 5. Exploded View & Part List 6. Wiring Diagram PX2370 Refer to the service manual in the GSPN (see the rear cover) for the more information.

  • Page 2: Table Of Contents

    Contents 1. Precautions ......................1-1 1-1. Safety Precautions ......................1-1 1-2. Servicing Precautions ..................... 1-2 1-3. Static Electricity Precautions ..................1-2 1-4. Installation Precautions ....................1-3 2. Product specifications .................... 2-1 2-1. Feature & Specifications ....................2-1 2-2. Spec Comparison to the Old Models ................2-2 2-3.
  • Page 3 Mideast & Africa http://mea.samsungportal.com © 2010 Samsung Electronics Co.,Ltd. This Service Manual is a property of Samsung Electronics Co.,Ltd. All rights reserved. Any unauthorized use of Manual can be punished under applicable Printed in Korea International and/or domestic law.

  • Page 4: Disassembly And Assembly

    3. Disassembly and Assembly 3. Disassembly and Assembly This section describes the disassembly and reassembly sequences for this monitor. Warning: As this monitor has parts that are sensitive to static electricity, be careful when handling them. 3-1. Disassembly Caution: 1. Turn the monitor off before beginning the disassembly process. 2.
  • Page 5 3. Disassembly and Assembly Description Photo Screws 3. Place the 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.
  • Page 6 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. 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: Fixing The Function Pcb

    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. Disassembly and Assembly Memo...

  • Page 10: Exploded View & Part List

    5. Exploded View & Part List 5. Exploded View & Part List 5-1. LS23WHUKF/XF - Exploded View...
  • Page 11 5. Exploded View & Part List 5-1-1. Parts List Location No. Code No. Description & Specification Q’ty SA/SNA Remark M0006 BN96-13409A ASSY SHIELD P-COVER;WHITE 23,SECC T0.8 M0013 BN96-12828A ASSY COVER P-REAR;WHITE 23,PMMA+ABS,HB,B M0014 BN94-03230K ASSY PCB MAIN-OTZ,W/W;LS23WTUKF5/EN M0027 BN96-12829A ASSY STAND P-BASE;WHITE 23,PMMA 3H,GY016 M0145 BN96-12843B ASSY BOARD P-FUNCTION TACT;WHITE,Functio...

  • Page 12: Parts List

    5. Exploded View & Part List 5-2. LS23WHUKF/XF - Parts List Service Bom (SA: SERVICE AVAILABLE, SNA: SERVICE NOT AVAILABLE) Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark BN90-02510A ASSY COVER FRONT;WHITE 23 ASSY COVER P-FRONT;WHITE T0003 BN96-12827A 23,PMMA,PMMA+AB ...3...
  • Page 13 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark ...3 3722-002922 JACK-DC POWER;3P,6.7mm,SnPb,Black ASSY HDCP;BN46-00018A,BR20/21BS_ ...3 BN97-00707A CS,MSTAR KEY CODE-CERTIFICATE;(HDCP KEY) ..4 BN46-00018A PPM42M5S, ...3 T0174 BN97-03934L ASSY SMD;LS23WTUKF5/EN,BN41-0* SOLDER-CREAM;LST309- ..4 0202-001477 0.711 M,D20~45um,96.5Sn/3A DIODE-...
  • Page 14 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark ..4 C258 2203-000236 C-CER,CHIP;0.1nF,5%,50V,C0G,1608 ..4 C409 2203-000292 C-CER,CHIP;0.01nF,5%,50V,C0G,1608 ..4 2203-000384 C-CER,CHIP;0.015nF,5%,50V,C0G,1608 ..4 C254 2203-000438 C-CER,CHIP;1nF,10%,50V,X7R,TP,1005 ..4 ZC14 2203-000626 C-CER,CHIP;0.022nF,5%,50V,C0G,1608 ..4 AD480 2203-002720 C-CER,CHIP;10nF,10%,25V,X7R,TP,1005 ..4 DC108 2203-005005...
  • Page 15 T0524 6902-000109 BAG PE;HDPE,T0.015,W350,L430,TRP,28,2,4..3 CIS4 BN61-01717A HOLDER-STAND;BIZET,NI PLT,CH,+,M4,L11(5) BRACKET-STAND BOTTOM;WHITE 23",EGI- ...3 BN61-06038A SECC, ...3 CCM1 BN63-02183K COVER-SHEET;Rhcm,PE Vinyl,T 0.04,250MM,2 COVER-STAND BASE;WHITE ...3 BN63-06408A 23",PMMA,3H,GY016 COVER-STAND BOTTOM;WHITE ...3 BN63-06409A 23",HIPS,HB,BK2 ...3 BN68-02304C LABEL-STICKER;WW,T0.05,50,10,LAVERDER 19 MANUAL FLYER-STAND;PX2370,WW,Mojo ...3 BN68-02532A 80g,21...
  • Page 16 T0527 BN68-00513A LABEL-E,PASS;ALL MODEL,YUPO(110G),50X15, MANUAL FLYER-WARRANTY CARD;Chinese,Art ...3 BN68-01789A MANUAL FLYER-TOC ...3 BN68-02186A GUIDE;COMM,SAMSUNG,10 L ...3 BN68-02533B MANUAL USERS-IB;PX2370,SC,Mojo 80g,210,1 BN91-04711B ASSY SHIELD-OTZ ONLY;WHITE 23 T0073 AA63-01200A GASKET-EMI;42S5,Conductive Fabric TAPE,0 CIS1 BN74-00021A TAPE-FILAMENT;Filament tape,clear,#8915, 0.24 ASSY BOARD P-FUNCTION M0146 BN96-12842B POWER;WHITE,Functi...
  • Page 17 5. Exploded View & Part List Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark ASSY BOARD P-FUNCTION ...3 BN96-12843A POWER;WHITE,Functi ASSY PCB MISC-F/PCB, MAIN;BN96- ..4 BN94-03450A 12843A,WH GUIDE-CONTROL;WHITE ..5 BN61-06033A 23",PMMA+ABS,BK23,H/ KNOB-CONTROL;WHITE ..5 T0022 BN64-01249A 23",PMMA+ABS,HB,BK23, ..5 T0174 BN97-03934Z ASSY SMD;WHITE F/PCB,BN41-0*...

  • Page 18: Precautions

    1. Precautions 1. Precautions 1-1. Safety Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1-1. Warnings For continued safety, do not attempt to modify the circuit board. Disconnect the AC power and DC power jack before servicing.

  • Page 19: Servicing Precautions

    1. Precautions 1-2. Servicing Precautions WARNING: An electrolytic capacitor installed with the wrong polarity might explode. Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions section of this manual. Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions.

  • Page 20: Installation Precautions

    1. Precautions 1-4. Installation Precautions For safety reasons, more than two people are required for carrying the product. Keep the power cord away from any heat emitting devices, as a melted covering may cause fire or electric shock. Do not place the product in areas with poor ventilation such as a bookshelf or closet. The increased internal temperature may cause fire.
  • Page 21 1. Precautions Memo...

  • Page 22: Product Specifications

    MagicLux: Screen brightness of the monitor automatically changes according to the ambient light intensity detected ሪ by the sensor Specifications Item Description Models Sync Master PX2370 LCD Panel TFT-LED panel, RGB vertical stripe, normally white transmissive, 23” Wide viewable 0.2652(H) X 0.2652(V) pixel pitch Scanning Frequency Horizontal : 30KHz ~ 81KHz...

  • Page 23: Spec Comparison To The Old Models

    2. Product specifications 2-2. Spec Comparison to the Old Models Model WHITE (PX2370) ECOFIT (XL2370) Design Brightness 250cd/m2 250cd/m2 Contrast 1000:1 1000:1 MEGA DCR MEGA DCR Response Time 5ms ( W to B) & 2ms (G to G) 5ms ( W to B) & 2ms (G to G)

  • Page 24: Accessories

    BN68-00174P Warranty Card BN68-01146D (Not available in all locations) User’s Guide, Monitor Driver, BN59-00992A Natural Color software, MagicTune™ software Stand Body BN96-12834A Samsung Electronics Stand Base BN96-12829A Service center CBF SIGNAL-DVI(I) to D-sub BN39-00310D 1,500mm(1.5M) Power Cord 3903-000384 1000mm(1.0M) Adaptor...

  • Page 25: Accessories (Sold Separately)

    2. Product specifications 2-4. Accessories (Sold separately) Product Description Ccde. No Remark DVI Cable BN39-00246L 1,500mm(1.5M) Samsung Electronics Service center HDMI Cable MD39-00116A...

  • Page 26: Troubleshooting

    4. Troubleshooting 4. Troubleshooting 4-1. Troubleshooting Set custom mode as follows before beginning a repair. - 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. The circuits to check: •...

  • Page 27: When The Power Does Not Turn On

    4. Troubleshooting 4-2. When the power does Not Turn on - When turning on the power button after connecting Adaptor, the LED at the front of the monitor Symptom does not operate. - Check the Adaptor power fuse and the Adaptor output power. - Check the connections for Adaptor and the Main board inside the monitor.
  • Page 28 4. Troubleshooting 4-2-1. Circuit diagrams when the power does not turn on...

  • Page 29: When The Screen Is Blank (Analog)

    4. Troubleshooting 4-3. When the screen is blank (Analog) - Even though the LED power turns on, the screen is blank when connecting the DVI-I to D-sub Symptom cable. - Check the DVI-I to D-sub cable connections. Major checkpoints - Check whether the LVDS(FFC) cable is connected correctly to the panel. - Check whether the lamp connector of the panel is connected correctly to the Inverter.
  • Page 30 4. Troubleshooting 4-3-1. When a blank screen is displayed (Analog)
  • Page 31 4. Troubleshooting 4-3-2. Waveforms when no screen is displayed (Analog)

  • Page 32: When A Blank Screen Is Displayed (Digital)

    4. Troubleshooting 4-4. When a blank screen is displayed (Digital) Symptom - Even though the LED power turns on, the screen is blank when connecting the DVI cable. - Check the DVI cable connections. Major checkpoints - Check whether the LVDS(FFC) cable is connected correctly to the panel. - Check whether the lamp connector of the panel is connected correctly to the Inverter.
  • Page 33 4. Troubleshooting 4-4-1. Circuit diagrams when a blank screen is displayed (Digital)
  • Page 34 4. Troubleshooting 4-4-2. Waveforms when a blank screen is displayed (Digital)

  • Page 35: When A Blank Screen Is Displayed (Hdmi)

    4. Troubleshooting 4-5. When a blank screen is displayed (HDMI) Symptom - Even though the LED power turns on, the screen is blank when connecting the HDMI cable. - Check the HDMI cable connections. Major checkpoints - Check whether the LVDS(FFC) cable is connected correctly to the panel. - Check whether the lamp connector of the panel is connected correctly to the Inverter.
  • Page 36 4. Troubleshooting 4-5-1. Circuit diagrams when a blank screen is displayed (HDMI) 4-11...
  • Page 37 4. Troubleshooting 4-5-2. Waveforms when a blank screen is displayed (HDMI) 4-12...

  • Page 38: Error Examples And Actions

    4. Troubleshooting 4-6. Error Examples and Actions Error Appearance Symptoms and Actions Remarks Symptom: DVI signals are not recognized. *On how to input DDC, refer to the training manual. Cause: This error occurs because the PC cannot recognize the mode information since the DVI DDC is not input to the monitor.

  • Page 39: Adjustment

    1) Use when updating the AD board code. 2) Download the WinDDC program, DDC Input program, and Hex and DDC files appropriate to the model through the Quality Control department of Samsung Electronics. Install the jig and input the data, as shown in the figure. Monitor needing...

  • Page 40: Service Function Specifications

    4. Troubleshooting 4-7-2. Service Function Specifications Checking the Code Version „ 1. Check the MCU code version and checksum after entering SVC Mode. 2. Entering SVC Mode - Adjust the Brightness and Contrast values to 0. - Hold down the Enter button for five (5) seconds. - The SVC Function OSD is displayed.
  • Page 41 4. Troubleshooting When replacing the panel „ After replacing the panel, select the Panel Ch. No. item and press the MENU key for five seconds. The Panel Ch. No. will then increment by one and the panel’s time information will be set to 0. At the same time, the panel cycle will be set to 0.
  • Page 42 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 : 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.
  • Page 43 4. Troubleshooting Entering DDC 1. Connect the DVI-I to D-Sub cable (DVI cable) to the PX2370 and DDC Manager respectively. 2. Install the “Winddc.exc” program. 3. Click the “Winddc” icon. 4. Click the Open [F5] icon. 5. Select a port # and DDC file.
  • Page 44 4. Troubleshooting Inputting the MCU Data „ 1) Check the following options. - Manufacture : MSTAR - Device Type :TSUMxx - Communication Por t: DSUB15(Analog) - External Memory : PMC25LV040 2) Click the LoadFile button, select an MCU code file, and then click the Open [O] button. 4-19...
  • Page 45 4. Troubleshooting 3) Click the Auto Program button. 4) When programming and verification are complete, hard power the monitor off and then on again. 4-20...
  • Page 46 4. Troubleshooting Inputting the Code (HDCP) „ 1. Run the service.exe file. 2. Click the HDCP button. 4-21...
  • Page 47 4. Troubleshooting 3. Click the HDCP Write button and select MStar_HDCPKEY. 4. Inputting the HDCP key is completed. 4-22...

  • Page 48: Wiring Diagram

    6. Wiring Diagram 6. Wiring Diagram 6-1. Wiring Diagram - Main Board...

  • Page 49: Board Connection

    6. Wiring Diagram 6-2. Board Connection - Main Board LVDS CN400 Function Connector CN202 Regulator LED Driver Regulator CN600 Flash Memory X300 IC200 Scaler IC300 DVI – I Jack Adaptor CN101 CN601 HDMI Jack Audio Out Optical Out CN102 CN700 OP700 Power Connector CN1201...

  • Page 50: Connector Functions

    6. Wiring Diagram 6-3. Connector Functions Connector Functions CN101 DVI-I (Analog/ Digital) signal input terminal * Upon occurrence of a fault: No RGB Output error may occur. CN201 Connects to the power Function board. * Upon occurrence of a fault: Either a No LED screen error may occur or the light sensor may not function.
  • Page 51 6. Wiring Diagram Memo...

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