Samsung LN26D450G1G Service Manual
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Samsung LN26D450G1G Service Manual

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EL9
SERVICE
TFT-LCD TV
Front Design : ToC Red Black
LN32D430G3DXZX
LN**D450G1G_M
VERDADERO
LCD-TV
Chassis : U61A
Model
Stand : Round
: LN26D450G1G
LN26D450G1M
LN32D450G1G
LN32D430G3DXZX
LN32D450G1M
Manual
Contents
1. Precautions
2. Product specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. Wiring Diagram

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Summary of Contents for Samsung LN26D450G1G

  • Page 1 VERDADERO LCD-TV Chassis : U61A Model : LN26D450G1G LN26D450G1M LN32D450G1G LN32D430G3DXZX LN32D450G1M SERVICE Manual TFT-LCD TV Contents 1. Precautions 2. Product specifications 3. Disassembly and Reassembly 4. Troubleshooting 5. Wiring Diagram Front Design : ToC Red Black Stand : Round...

  • Page 2: Table Of Contents

    Contents 1. Precautions ......................1-1 1-1. Safety Precautions ......................1-1 1-2. Servicing Precautions ..................... 1-2 1-3. Electrostatically Sensitive Devices (ESD) Precautions ..........1-2 1-4. Installation Precautions ....................1-3 2. Product specifications .................... 2-1 2-1. Model Comparison ......................2-1 2-2. Feature & Specifications ....................2-2 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: 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 5: 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 6: Installation Precautions

    1. Precautions 1-4. Installation Precautions For safety reasons, more than a 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 7: Product Specifications

    2. Product specifications 2. Product specifications 2-1. Model Comparison Model Inch LD450 Front View Detail View Front Color ToC RED Black With Stand 660.7 x 222.1 x 482.8 (mm) / 26 x 8.7 x 19 (inch) 26" Without Stand 660.7 x 78.6 x 435 (mm) / 26 x 3.1 x 17.1 (inch) Dimensions W x D x H With Stand 795.5 x 251.7 x 571.1 (mm) / 31.3 x 9.9 x 22.5 (inch)

  • Page 8: Feature & Specifications

    2. Product specifications 2-2. Feature & Specifications Model LN26D450G1G (HD) Feature Digital-TV, RF, 2-HDMI, 2-Component, 2-A/V, 1-USB2.0, D-SUB ሪ Brightness: 400 cd/m ሪ High Contrast Ratio : 4,500:1 ሪ Response Time: 8.5 ms ሪ Specifications Item Description LCD Panel 26 inch HD 60 Hz...
  • Page 9 2. Product specifications Model LN26D450G1M (HD) Feature Digital-TV, RF, 2-HDMI, 2-Component, 2-A/V, 1-USB2.0, D-SUB ሪ Brightness: 400 cd/m ሪ High Contrast Ratio: 4,500:1 ሪ Response Time: 8.5 ms ሪ Specifications Item Description LCD Panel 26 inch HD 60 Hz Horizontal: 60 KHz ~ 73 KHz (Automatic) Scanning Frequency Vertical: 47 Hz ~ 63 Hz (Automatic) Display Colors...
  • Page 10 2. Product specifications Model LN32D450G1G (HD) Feature Digital-TV, RF, 2-HDMI, 2-Component, 2-A/V, 1-USB2.0, D-SUB ሪ Brightness: 400 cd/m ሪ High Contrast Ratio: 4,000:1 ሪ Response Time: 8.5 ms ሪ Specifications Item Description LCD Panel 32 inch HD 60 Hz Horizontal: 60 KHz ~ 73 KHz (Automatic) Scanning Frequency Vertical: 47 Hz ~ 63 Hz (Automatic) Display Colors...
  • Page 11 2. Product specifications Model LN32D450G1M (HD) Feature Digital-TV, RF, 2-HDMI, 2-Component, 2-A/V, 1-USB2.0, D-SUB ሪ Brightness: 400 cd/m ሪ High Contrast Ratio: 4,000:1 ሪ Response Time: 8.5 ms ሪ Specifications Item Description LCD Panel 32 inch HD 60 Hz Horizontal: 60 KHz ~ 73 KHz (Automatic) Scanning Frequency Vertical: 47 Hz ~ 63 Hz (Automatic) Display Colors...

  • Page 12: Specification Comparison To Old Models

    2. Product specifications 2-3. Specification Comparison to Old Models LD4G (HD) LC4E / LC5F / LC5K Model LN**D450G1G_M LN**C4*0E*M / LN**C530F1M / LN**C550J1M Design Display Type LCD TV LCD TV Built-in Tuner Resolution 1366 X 768 1366 X 768 LCD Panel TFT LCD Panel 60 Hz TFT LCD Panel 60 Hz Screen Size...

  • Page 13: Detail Factory Option

    2. Product specifications 2-4. Detail Factory Option If you replace the main board with new one, please change the factory option as well. The options you must change ※ are “Type”. Model Name LN26D450G1G LN32D450G1G LN26D450G1M LN32D450G1M Vendor Panel CODE...

  • Page 14: Media Play

    USB Compatibility problem. Before connecting your device to The TV, Please back up your files to prevent them from damage or loss of data. SAMSUNG is not responsible for any data file damage or data loss. Do not disconnect The USB device while it is loading.

  • Page 15: Supported Formats

    2. Product specifications 2-5-2 Supported Formats Supported Subtitle Formats „ Name File extension Format MPEG-4 time-based text .ttxt text SAMI .smi HTML SubRip .srt string-based SubViewer .sub string-based Micro DVD .sub or .txt string-based Supported Video Formats „ Frame rate Bit rate File Container...

  • Page 16: Other Restrictions

    Below 1280 x 720: 60 frame max channel or lossless audio. Above 1280 x 720: 30 frame max WMA sampling rate 22050 Hz mono is not supported. H.263 is not supported. GMC 2 is not support. Only Samsung Techwin MJEPG is supported. 2-10...

  • Page 17: Accessories

    2. Product specifications 2-6. Accessories Product Description Code. No Remark Remote Control AA59-00486A Samsung Electronics Power Cord 3903-000601 Service center Owner’s Instructions BN68-03375A Warranty Card / AA68-03242L Safety Guide Manual AA68-03533A (Not available in all locations) 2-11...

  • Page 18: Disassembly And Reassembly

    3. Disassembly and Reassembly 3. Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the LCD TV. WARNING: This LCD TV contains electrostatically sensitive devices. Use caution when handling these components. 3-1. Disassembly and Reassembly Cautions: 1.
  • Page 19 3. Disassembly and Reassembly Description Inch Picture Description Screws Remove stand. 26" 32" Remove the screws of rear-cover. 26": 7 EA 32": 8 EA 6002-001294 26" 32"...
  • Page 20 3. Disassembly and Reassembly Description Inch Picture Description Screws Lift up the rear-cover. Remove the left and right speaker. Remove the screws of main board. 26", 32": 4 EA Remove the screws of IP board. 26", 32": 5 EA 6001-002284 26"...
  • Page 21 3. Disassembly and Reassembly Description Inch Picture Description Screws Remove the screws of stand link. 26": 2 EA 32": 5 EA Remove the screws of panel and front. 6001-002284 26" / 32": 2 EA. 26" screw is hidden under speaker ...

  • Page 22: Stand Assembly

    3. Disassembly and Reassembly 3-2. Stand Assembly Rear cover screws Stand Guide screws Inch Rear cover screws Stand Guide screws 26" 6002-001294 3 EA 32" 6002-001294 4 EA 6002-001294 4 EA Screw Size Code No. A (mm) B (mm) C (mm) Q'ty 26": 10 EA 6002-001294...

  • Page 23: Troubleshooting

    4. Troubleshooting 4. Troubleshooting 4-1. Troubleshooting Check the various cable connections first. Check to see if there is a burnt or damaged cable. Check to see if there is a disconnected or loose cable connection. Check to see if the cables are connected according to the connection diagram. Check the power input to the Main Board.

  • Page 24: No Power

    4. Troubleshooting 4-1-2. No Power The LEDs on the front panel do not work when connecting the power cord. Symptom The SMPS relay does not work when connecting the power cord. The units appears to be dead. The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are improperly connected or the Main Board or SMPS is not functioning.
  • Page 25 4. Troubleshooting Check a other function (No picture part). Diagnostics A power is supplied to set? Replace a LCD Panel. Caution Make sure to disconnect the power before working on the IP board. Location (Main) - TOP BD1012 L201 BD209 IC202 (#5) BD1003 BD1002...
  • Page 26 4. Troubleshooting 4-1-3. No Video_Analog PC signal Symptom Audio is normal but no picture is displayed on the screen. Check the PC source. Major Check the Arsenal, Check the Chelsea. checkpoints This may happen when the LVDS Cable connecting the Main Board and the Panel is disconnected. Power indicator LED is off.
  • Page 27 4. Troubleshooting Location (Main) - TOP BD404 R805 R804 BD405 R806 ODD_TXCLK- ODD_TXCLK+ EVEN_TXCLK- EVEN_TXCLK+...
  • Page 28 4. Troubleshooting WAVEFORMS „ PC input (V-sink, H-sink, R / G / B) LVDS output...
  • Page 29 4. Troubleshooting 4-1-4. No video_HDMI1, 2 - Digital signal Symptom Audio is normal but no picture is displayed on the screen. Check the HDMI source. Major Check the HDMI switch, Check the Chelsea. checkpoints This may happen when the LVDS Cable connecting the Main Board and the Panel is disconnected. Power indicator LED is off.
  • Page 30 4. Troubleshooting Location (Main) - TOP Pin #7 Pin #12 ODD_TXCLK- ODD_TXCLK+ EVEN_TXCLK- EVEN_TXCLK+...
  • Page 31 4. Troubleshooting WAVEFORMS „ HDMI input (RX_Data, RX_Clk) LVDS output...
  • Page 32 4. Troubleshooting 4-1-5. No Video_Tuner - CVBS Symptom Audio is normal but no picture is displayed on the screen. Check the Tuner CVBS source. Major Check the Tuner, Check the Chelsea. checkpoints This may happen when the LVDS Cable connecting the Main Board and the Panel is disconnected. Power indicator LED is off.
  • Page 33 4. Troubleshooting Location (Main) - TOP ODD_TXCLK- ODD_TXCLK+ EVEN_TXCLK- EVEN_TXCLK+ Location (Main) - BOTTOM 4-11...
  • Page 34 4. Troubleshooting WAVEFORMS „ LVDS output 4-12...
  • Page 35 4. Troubleshooting 4-1-6. No Video_Tuner DTV Symptom Audio is normal but no picture is displayed on the screen. Check the DTV source. Major Check the Tuner, Check the Chelsea. checkpoints This may happen when the LVDS Cable connecting the Main Board and the Panel is disconnected. Power indicator LED is off.
  • Page 36 4. Troubleshooting Location (Main) - TOP ODD_TXCLK- ODD_TXCLK+ EVEN_TXCLK- EVEN_TXCLK+ Location (Main) - BOTTOM 4-14...
  • Page 37 4. Troubleshooting WAVEFORMS „ LVDS output 4-15...
  • Page 38 4. Troubleshooting 4-1-7. No Video_Video CVBS Symptom Audio is normal but no picture is displayed on the screen. Check the Video CVBS source. Major Check the Chelsea. checkpoints This may happen when the LVDS Cable connecting the Main Board and the Panel is disconnected. Power indicator LED is off.
  • Page 39 4. Troubleshooting Location (Main) - TOP ODD_TXCLK- R821 R816 R814 ODD_TXCLK+ R809 EVEN_TXCLK- EVEN_TXCLK+ 4-17...
  • Page 40 4. Troubleshooting WAVEFORMS „ CVBS OUT (Grey Bar) LVDS output 4-18...
  • Page 41 4. Troubleshooting 4-1-8. No Video_Component Symptom Audio is normal but no picture is displayed on the screen. Check the Component source. Major Check the chelsea. checkpoints This may happen when the LVDS Cable connecting the Main Board and the Panel is disconnected. Power indicator LED is off.
  • Page 42 4. Troubleshooting Location (Main) - TOP R815 R810 R821 ODD_TXCLK- R816 R814 ODD_TXCLK+ R817 R809 R808 EVEN_TXCLK- EVEN_TXCLK+ 4-20...
  • Page 43 4. Troubleshooting WAVEFORMS „ Compnent_Y (Gray scale) / Pb / Pr (Color bar) LVDS output 4-21...

  • Page 44: No Sound

    4. Troubleshooting 4-1-9. No Sound Symptom Video is normal but there is no sound. When the speaker connectors are disconnected or damaged. Major When the sound processing part of the Main Board is not functioning. checkpoints Speaker defect. Check the source and check the connection of Input the sound source properly.
  • Page 45 4. Troubleshooting Location (Main) - TOP BD209 R550 R549 R419 R420 R+, R-, L+, L- R525 R524 WAVEFORMS „ Speaker out 4-23...

  • Page 46: Function

    4. Troubleshooting 4-2. Function Control the sensitivity of function key is available in Factory mode. Option Sub Option Key Sensitivity Control Function Key Expert ADC / WB Advanced Key Sensitivity Default: 1 ~ 254 and Not Used Raising this value, the sensitivity decreases Not Used: Not use sensitivity, use Function Default value Function Key Default:...

  • Page 47: Factory Mode Adjustments

    4. Troubleshooting 4-3. Factory Mode Adjustments 4-3-1. Entering Factory Mode If you do not have Factory remote- control Power OFF MUTE Power ON If you have Factory remote-control INFO Factory If you don’t have Factory remote control, can’t access the factory mode. T - MST4IBRC - XXX Option T - MST4IBRS - XXX...

  • Page 48: Factory Data

    4. Troubleshooting 4-3-2. Factory Data LD450 „ Option Factory Menu Name Data Range Remark Factory Reset NONE / 19A6TH0C / 19I6TH0C / 22D6AF0C / 22I6AF0C / 26A6AH0C 26A6AH0C / 6D6AH0C / 32A6AF0C / 32A6AH0C / 32D6AF0C / 32L6AH0C / 37L6AF0C / 40A6AF0C / 40L6AF0C / 46A6AF0C / 46D6AF0C / 19A6AH0E / 19P6AH0E Type...
  • Page 49 4. Troubleshooting Watchdog ON / OFF WD Count 0 ~ 255 Dimm Type fixed Lvds Format JEIDA JEIDA / VESA / 19INCH Language_Arbic KR / US / EU Info+fatory TOOLS Support 0 ~ 255 Info+fatory LNA Support 0 ~ 255 Info+fatory MediaPlay DB On whth 5MB...
  • Page 50 4. Troubleshooting EER Reset Info+fatory Info+fatory NVR All Clear Spread Spectrum LVDS Spread ON / OFF Info+fatory Period 30K / 40K / 50K / 60K Info+fatory Amplitude 0.0 / 0.5 / 1.0 / 1.5 / 2.0 / 2.5 / 3.0 Info+fatory DDR Spread 0.1 ~ 2.0%...
  • Page 51 ON / OFF S-Micom Upgrade ON / OFF Hotel Option Hotel Mode ON / OFF Samsung / 2M / Locatel / VDA / VDA-SAcentic / Premiere / Sustinere / Quadriga / ETV / Ibahn / Magilink / SI Vender Samsung Info+fatory...
  • Page 52 4. Troubleshooting Channel Type ATV / DTV / CATV / CDTV Power On Volume 0 ~ 100 Min Volume 0 ~ 100 Max Volume 0 ~ 100 Panel Button Lock Unlock Unlock / Lock / OnlyPower TV / AV / Comp / PC / HDMI1 / HDMI2 / Power On Source HDMI3 / HDMI4 Shop Option...
  • Page 53 4. Troubleshooting SPDIF PCM Gain -9dB -10dB ~ 0dB Info+fatory BTSC Mono Prescale -10 ~ 10 Info+fatory BTSC streo Prescale -10 ~ 10 Info+fatory SAO Prescale -10 ~ 10 Info+fatory A2 Ident High Thld -10 ~ 10 Info+fatory A2 Ident Low Thld -10 ~ 10 Info+fatory Carrier2 Amp High Thld...
  • Page 54 4. Troubleshooting HDMI ROBIN ON / OFF Info+fatory HDMI Callback ON / OFF Info+fatory HDMI CTS Thld 0 ~ 15 Info+fatory HDMI CTS Cnt1 0 ~ 15 Info+fatory TMDS_EQ2_Boost 0 ~ 7 Info+fatory TMDS_EQ2_Gain 0 ~ 3 Info+fatory TMDS_PLL_Loop 0 ~ 3 Info+fatory TMDS_CPREG_BLEED 0 ~ 1...
  • Page 55 4. Troubleshooting Factory Menu Name Data Range Remark Test Pattern OFF / White / Grey / Black / Red / Green Pattern Sel / Blue Logic Pattern Sel … fixed Logic Level Sel … fixed Panel Auto Setting Success Info+fatory Panel Display Time 22Hr Logic Usb D / L...
  • Page 56 4. Troubleshooting Master Lock_1 A_Modulation_1 A_Code Rate_1 A_Timer InterLeave_1 A_Segments Num_1 A_Ber_1 B_Modulation_! B_Code Rate_1 B_Timer InterLeave_1 B_Segments Num_1 B_BER_1 C_Modulation_1 C_Code Rate_1 C_Timer InterLeave_1 C_Segments Num_1 C_BER_1 T-ConUsbDownload Failire ADC / WB Factory Menu Name Data Range Remark AV Calibration Success Success / Failure Comp Calibration...
  • Page 57 4. Troubleshooting 1st_PC_Delta 0 ~ 7 2nd_AV_R_Low fixed 2nd_AV_G_Low fixed 2nd_AV_B_Low fixed 2nd_AV_R_High fixed 2nd_AV_G_High fixed 2nd_AV_B_High fixed 2nd_AV_Delta 0 ~ 7 2nd_COMP_R_Low fixed 2nd_COMP_G_Low fixed 2nd_COMP_B_Low fixed 2nd_COMP_R_High fixed 2nd_COMP_G_High fixed 2nd_COMP_B_High fixed 2nd_COMP_Delta 0 ~ 7 2nd_PC_R_Low fixed 2nd_PC_G_Low fixed 2nd_PC_B_Low...
  • Page 58 4. Troubleshooting 2nd_B_H 0 ~ 255 Sub Brightness 0 ~ 1023 R_Offset 0 ~ 1023 G_Offset 0 ~ 1023 B_Offset 0 ~ 1023 Sub Contrast 0 ~ 1023 R_Gain 0 ~ 1023 G_Gain 0 ~ 1023 B_Gain 0 ~ 1023 Movie R Offset …...

  • Page 59: White Balance -Calibration

    4. Troubleshooting 4-4. White Balance - Calibration 4-4-1. White Balance -Calibration ADC / WB AV Calibration Comp Calibration PC Calibration HDMI Calibration 4-4-2. Service Adjustment You must perform Calibration in the Lattice Pattern before adjusting the White Balance. Color Calibration / Adjust spec Source: HDMI Setting Mode: 1280 x 720 @ 60 Hz Pattern: Pattern #24 (Chess Pattern)
  • Page 60 4. Troubleshooting Method of Color Calibration (Component) „ Apply the 720p Lattice (N0. 6) pattern signal to the Component IN 1 port. Press the Source button to switch to “Component 1” mode. Enter Service mode. Select the “ADC” menu. Select the “Comp Calibration” menu. In “Comp Calibration Off”...
  • Page 61 4. Troubleshooting LN26D450G1G / LN26D450G1M „ Adjustment Coordinate CA - 210 P - Mode Y (Luminance) T (K) + MPCD [Dynamic Cool1] 49 fL H / L 12,000 (+ / -0) (Sub_CT: 128 Fix) HDMI Comp 3.6 f L L / L...

  • Page 62: Servicing Information

    4. Troubleshooting 4-5. Servicing Information To RS232C control Port: COM# (Serial) Bit rate: 38400 Data Bit: 8 bit Parity: None Stop Bits: 1 Flow Control: None Description of RS232C Pin# Name Full Name Carrier Detect Received Data Transmitted Data Data Terminal Ready Signal Ground Data Set Ready Request To Send...

  • Page 63: Software Upgrade

    4. Troubleshooting 4-6. Software Upgrade Software Upgrade can be performed by downloading the latest firmware from samsung.com to a USB memory device. Current Version - the software already installed in the TV. Note Software is represented as ‘Year / Month / Day_Version’.

  • Page 64: Rear Cover Dimension

    4. Troubleshooting 4-7. Rear Cover Dimension Model LN26D450G1G 203.3 (mm) 61.4 (mm) 110.2 (mm) 431.4 (mm) 200 (mm) 100 (mm) LN26D450G1M LN32D450G1G 259.5 (mm) 66.8 (mm) 129.4 (mm) 560.8 (mm) 200 (mm) 200 (mm) LN32D450G1M 4-42...

  • Page 65: Wiring Diagram

    5. Wiring Diagram 5. Wiring Diagram 5-1. Wiring Diagram HD Model „ IP Board Main Board CNI802 Driver CN201 CN801 CN1602_HD CN1201 CN302 T-CON Speaker Speaker Function&IR...

  • Page 66: Connector

    5. Wiring Diagram 5-2. Connector CN201 (To Powr board) CN1602_HD (To Panel) B5 V Panel_VCC ODD [CLK]+ SW_POWER B12VS Panel_VCC ODD [CLK]- B5 V SW_INVERTER Panel_VCC A5 V B13 V Panel_VCC ODD [2]+ Panel_VCC ODD [2]- B13 V B12VS PWM_DIMM ODD [1]+ ODD [1]- TCON_WP...
  • Page 67 5. Wiring Diagram CN301 (MONITOR OUT) CN401 (PC) PC_RED PC_5 V OUT_R PC_GREEN IDENT_PC OUT_R PC_BLUE R_FANET T_FANET SDA_DOWN PC_HS CN302 (SPEAKER) PC_VS SCL_DOWN CN1201 (FUNCTION) CN402 (PC / DIV SOUND) MSDA FUNC_INTR PC_SR_IN A3.3 V LED_STB PC_SL_IN MSCL CN504 (UNIVERSAL JACK) CN1501 (USB1) USB_VCC USB_DP...

  • Page 68: Connector Functions

    5. Wiring Diagram 5-3. Connector Functions Connector Functions CN201 ↔ IP CN801 Supply main power and dimming signal from IP board to Main Board. CN1601_FHD / CN1602_HD ↔ T-Con CNF1 The LVDS signal transfered from Main Board to Panel. CNI802 ↔ T-BALANCE Board Supply power from IP board to Driver Board.

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