Samsung T23A750 Service Manual
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Samsung T23A750 Service Manual

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See also: User Manual , Manual
SERVICE
TFT-LCD Monitor
T23A750 / T27A750
LCD-Monitor
Chassis : WDU1
Model
: T23A750
T27A750
Manual
1. Precautions
2. Product specifications
3. Disassembly and Reassemble
4. Troubleshooting
5. Wiring Diagram
Contens

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Summary of Contents for Samsung T23A750

  • Page 1 LCD-Monitor Chassis : WDU1 Model : T23A750 T27A750 SERVICE Manual TFT-LCD Monitor Contens 1. Precautions 2. Product specifications 3. Disassembly and Reassemble 4. Troubleshooting 5. Wiring Diagram T23A750 / T27A750...

  • 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 ..................1-3 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 ................2-3 2-3.
  • Page 3 This Service Manual is a property of Samsung Electronics Co.,Ltd. © 2011 Samsung Electronics Co.,Ltd. Any unauthorized use of Manual can be punished under applicable All rights reserved. International and/or domestic law. Printed in Korea...
  • Page 4 3. Disassembly and Assembly 3. Disassembly and Assembly This section describes the disassembly and reassembly sequences for this monitor. As this monitor has parts that are sensitive to static electricity, be careful when handling them. 3-1. Disassembly Turn the monitor off before beginning the disassembly process. When disassembling the monitor, do not use any metal tools except for the provided jig.
  • Page 5 3. Disassembly and Assembly Description Photo 3. Remove the 2 screws from the COVER REAR, and separate the COVER FRONT starting from the upper part as shown in the image. Screw 6001-001114 2 EA * Internal locking tabs on the front and back covers.
  • Page 6 3. Disassembly and Assembly Description Photo 5. Remove the tape as shown in the image. 6. Remove the jacks and cables from the main board, and separate the speakers.
  • Page 7 3. Disassembly and Assembly Description Photo 7. Remove the LVDS cable. * When you reassemble, be careful not to reverse LVDS cable. The direction of the cable is printed on it. (‘Panel’, ‘Main’)
  • Page 8 3. Disassembly and Assembly Description Photo 8. Remove the 4 screws, and separate the main board. Screw 6003-000264 4 EA...
  • Page 9 3. Disassembly and Assembly Description Photo 9. Remove the LVDS cable. Then remove the HOLDER from the main board and BRACKET AV, and separate the BRACKET AV. * New type of LVDS connector applied to 11’ model.(Double locking) 1. Flip up the locking tab on top of the connector.
  • Page 10 3. Disassembly and Assembly Description Photo 11. Separate the COVER STAND REAR. 12. Remove the 4 screws, and separate the HINGE and STAND NECK. Screw 6003-001374 4 EA...
  • Page 11 3. Disassembly and Assembly Description Photo 13. Separate the STAND MIDDLE. 14. Remove the 4 screws from the STAND BOTTOM. Screw 6003-001785 4 EA...
  • Page 12 3. Disassembly and Assembly Description Photo 15. Separate the STAND TOP. ※ Reassembly procedures are in the reverse order of disassembly procedures. Screw Size Code No. A (mm) B (mm) C (mm) Q’ty 6001-001114 6 EA 6003-000264 4 EA 6003-001374 4 EA 6003-001785 5 EA...

  • Page 13: 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 14: Servicing Precautions

    1. Precautions 1-1-4. Product Safety Notices Some electrical and mechanical parts have special safetyrelated characteristics which are often not evident from visual inspection. The protection they give may not be obtained by replacing them with components rated for higher voltage, wattage, etc.

  • Page 15: Static Electricity Precautions

    1. Precautions 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 static electricity. Immediately before handling any semiconductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground.

  • Page 16: Product Specifications

    2. Product specifications 2. Product specifications 2-1. Feature & Specifications Feature Supreme Digital Interface & Networking ሪ With a built-in ATV&DTV tuner, it supports TV with no particular set-top box and provides simple access with a single remote control. Excellent Picture Quality ሪ...
  • Page 17 2. Product specifications Specifications Item Description Model T23A750 T27A750 LCD Panel TFT-LCD panel, RGB vertical stripe, normally white transmissive 23” Wide viewable 27” Wide viewable 0.2655(H) x 0.2655(W) mm pixel pitch 0.31125(H) x 0.31125(W) mm pixel pitch Scanning Frequency Horizontal : 30 kHz ~ 81 kHz (Automatic)

  • Page 18: Spec Comparison To The Old Models

    Response Time Viewing Angle Left/Right/Up/Down : 85˚/85˚/80˚/80˚ Left/Right/Up/Down : 80˚/80˚/80˚/80˚ PC Input DVI(HDMI) D-SUB, DVI(HDMI) T23A750 : 65 W <0.5 Watt(Switch off) Power Consumption 35W<0.3W T27A750 : 70 W <0.5 Watt(Switch off) DPMS Less than 1.5 Watt Less than 0.3W...

  • Page 19: Accessories

    AA68-03242L Warranty Card BN68-02001A (Not available in all locations) User Manual BN68-03598A Cleaning Cloth BN63-01798B [Model Standard of [USA/Canada] LT23A750ND/ZA] AA59-00442A Samsung Electronics [EU/CIS] Service center AA59-00445A Remote Control & Batteries (AAA x 2) [Brasil] AA59-00451A [Australia/New Zealand/Singapore] AA59-00445A Batteries...
  • Page 20 Description Code. No Remark [USA/Canada] 3903-000598 [EU/CIS] 3903-000525 Power Cord [Brasil] 3903-000532 [Australia/New Zealand/Singapore] 3903-000563 HDMI Cable BN39-01502A [Model Standard of LT23A750ND/ZA] Component Gender BN39-01154W Samsung Electronics Service center Stereo Cable BN39-01286A 3D Glasses Assy BN96-18236A S/W DRIVER-TRIDEF 3D BN46-00078D...

  • Page 21: Troubleshooting

    4. Troubleshooting 4. Troubleshooting 4-1. First Checklist for Troubleshooting Self-Test Feature Check „ Your monitor provides a self test feature that allows you to check whether your monitor is functioning properly. Turn off both your computer and the monitor. Unplug the video cable from the back of the computer Turn on the monitor.

  • Page 22: No Power

    4. Troubleshooting 4-2. No Power The LED on the front panel of the monitor does not work when the power is connected and the Symptom Power button is pressed. Check if the Power switch on the rear panel of the monitor has been turned on. Major Check the SMPS fuse and output power of power adapter.
  • Page 23 4. Troubleshooting 4-2-1. Circuit diagrams when the power does not turn on...
  • Page 24 4. Troubleshooting...
  • Page 25 4. Troubleshooting...
  • Page 26 4. Troubleshooting...
  • Page 27 4. Troubleshooting 4-2-2. Waveforms...

  • Page 28: Hdmi No Screen

    4. Troubleshooting 4-3. HDMI No Screen The LED power turns on but the screen is blank when the HDMI cable is connected. Symptom Check the HDMI cable connections. Major Check whether the LVDS cable is connected correctly to the panel. checkpoints Check the circuit related HDMI input and scaler operation.
  • Page 29 4. Troubleshooting 4-3-1. Circuit diagrams and waveforms (HDMI No Screen) when no screen is displayed on the monitor HMR41-AK5200...
  • Page 30 4. Troubleshooting HMR41-AK5200 4-10...
  • Page 31 4. Troubleshooting 4-11...
  • Page 32 4. Troubleshooting 4-3-2. Waveforms 4-12...

  • Page 33: Faults And Corrective Actions

    4. Troubleshooting 4-4. Faults and Corrective Actions Fault Photo Symptoms and Corrective Actions Remarks Symptoms: When the monitor is turned on, only a full black screen is displayed continually regardless of the signals. Causes: This fault occurs due to a fault or incorrect connections of the LVDS cable.

  • Page 34: Adjustment

    - TV/AV key: Switch to AV mode. 4-6-2. Factory specifications * When you have replaced the main board, change the settings according to the following factory specifications. Note that the “Type” setting must be changed. Model Name T23A750 T27A750 Vendor AMLCD AMLCD...
  • Page 35 4. Troubleshooting 4-6-3. Service Mode Menu Initial display in service mode Mode : DTV , RES : NOTSUPPORT Option T-GASMAKUC-XXX Main SW version T-GENMAUSS1-XXX Sub SW version Control E-Manual : MGSATSCA-xxxx e-manual version EDID SUCCESS Expert CALIB : AV / COMP / PC / HDMI / ADC/WB Option : 2022090012A Advanced...
  • Page 36 4. Troubleshooting Sub-Page of Service „ Option Control Factory Reset EDID Type 27A1TF0E Sub Option Local Set PDP Option Model TA750 Hosptality Option Tuner SEC_Si2173 Shop Option Asia Option Light Effect Sound Ch Table NONE Tuner Status Front Color U-T-BL-M Config Option ADC/WB ADC Target...

  • Page 37: White Balance -Calibration

    4. Troubleshooting 4-7. White Balance - Calibration 4-7-1 White Balance -Calibration 1. Calibration PC Calibration 4-7-2 Service Adjustment - You must perform Calibration in the Lattice Pattern before adjusting the White Balance. Color Calibration „ Adjust spec. 1. Source : PC 2.

  • Page 38: White Ratio (Balance) Adjustment

    4. Troubleshooting 4-7-3 White Balance - Adjustment (low light) (hight light) Sub Bright Sub Contrast 3. W/B R offset R gain G offset G gain B offset B gain (W/B adjustment Condition refer next page) 4-8. White Ratio (Balance) Adjustment * All White Balance default value for TA750/TA950 is set in a factory line already.

  • Page 39: Servicing Information

    4-9. Servicing Information 4-9-1. USB Download Method Samsung may offer upgrades for Monitor’s firmware in the future. Upgrades will be possible by connecting a USB drive to the USB port located on your Monitor. Insert a USB drive containing the firmware upgrade into the USB port on the rear of the Monitor.

  • Page 40: Software Upgrade

    4. Troubleshooting 4-10. Software Upgrade 4-10-1. Program Upgrading - MAIN 1. If you select MENU → Support → Software Upgrade on remote control, you’ll see below picture. 2. Press ENTER, then you’ll see below picture. Select Yes 3. Micom program is now upgrading as below picture. After Software Upgrade is process by 100%, the monitor is automatically turn off and on.

  • Page 41: Micom Program Upgrade

    4. Troubleshooting 4-11. Micom Program Upgrade 1. Enter the Factory Mode and select the “SVC” menu. Mode : COMP , RES : NOTSUPPORT T-GASMAKUC-XXX Option T-GENMAUSS1-XXX Control E-Manual : MGSATSCA-xxxx EDID SUCCESS Expert CALIB : AV / COMP / PC / HDMI / ADC/WB Option : 2022090012A Advanced...
  • Page 42 4. Troubleshooting 2. Select the “MICOM UPGRADE” menu. MAIN : SVC, MODE: COMP, RES : NOTSUPPORT Test Pattern DCc_Check_Local Panel Auto Setting Failure DCC_Check_Total PANEL DISPLAY TIME 12Hr IR_ON_OFF T-CON USB Failure BT_ON_OFF Download T-CON CheckSum BT ADDRESS e4e0c53574a2 CPLD USB Download Failure BT ADDRESS REMOCON PAIRING...

  • Page 43: Wiring Diagram

    5. Wiring Diagram 5. Wiring Diagram 5-1. Wiring Diagram N301 CN302 CN1601 DGND F_TXO0N 45 B_TXE2P HP_LINE_SL_OUT F_TXO0P 46 DGND HP_LINE_SR_OUT F_TXO1N 47 B_TXECN IDENT_HP F_TXO1P 48 B_TXECP DGND F_TXO2N 49 DGND CN201 HP_LINE_SL_OUT F_TXO2P 50 B_TXE3N A14V_PW DGND 51 B_TXE3P DGND CN402 F_TXOCN...
  • Page 44 5. Wiring Diagram CN604 CN602 CN1201_3D HDMI2_RX2+ HDMI1_RX2+ MHL_AON DGND DGND HDMI2_RX2- HDMI1_RX2- A3.3V_PW HDMI2_RX1+ HDMI1_RX1+ MSCL_A5V DGND DGND MSDA_A5V HDMI2_RX1- HDMI1_RX1- WAKE HDMI2_RX0+ HDMI1_RX0+ LED_STB DGND DGND DGND HDMI2_RX0- HDMI1_RX0- 10 HDMI2_RXCLK+ 10 HDMI1_RXCLK+ 10 NC 11 DGND 11 DGND 11 FRAME_SYNC_IN 12 HDMI2_RXCLK- 12 HDMI1_RXCLK-...

  • Page 45: Board Connection

    5. Wiring Diagram 5-2. Board Connection Main Board „ CN1601 (Bottom side) CN1801_CI (Europ Only) CN301 CN503_EU (UK/Brasil Option) (US/Korea Option) CN1502 CN1201_3D CN501 CN302 CN503_EU CN201 CN602 CN1501 CN1401_RS CN1701 CN402 CN604 CN303 Connector Speaker Function & B/T Connector(Connect with function Assy) Adaptor DC Power(+14V) Digital Audio Output(Optical) ATV/DTV Tuner...

  • Page 46: Connector Functions

    5. Wiring Diagram 5-3. Connector Functions Connector Functions CN1601 Transmits LVDS signals from the Main board to the panel * When a problem occurs: The Blank Screen and No Power errors may occur. CN604, CN602 HDMI&DVI signal input terminal * When a problem occurs: The No HDMI&DVI Output error may occur. CN201 Supplies 14V from the Power adapter to the Main board.

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T27a750

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