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LCD-TV Chassis : GCR40ASA GCR40CCN Model : LA40A450C1X LA40A350C1X SERVICE Manual TFT-LCD TV Contents 1. Precautions 2. Product specifications 3. Disassembly and Reassembly 4. Troubleshooting 5. Exploded View & Part List 6. Wiring Diagram 7. Schematic Diagram LA40A450C1X / LA40A350C1X Refer to the service manual in the GSPN (see the rear cover) for the more information.
3. Disassembly and Reassemble 3. Disassembly and Reassemble This section of the service manual describes the disassembly and reassembly procedures for the LA40A450C1 LCD TV. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1. Disassembly Cautions: 1.
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3. Disassembly and Reassemble Description Picture Description Screws 3. Remove Screw from the stand BRKT and lift up the stand BRKT. 4. Disonnect cable from the boards. 5. Remove the screws of Scaler board’s shield case and boards.
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3. Disassembly and Reassemble Description Picture Description Screws 6. Remove screws and Lift up the Lod pa...
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3. Disassembly and Reassemble Description Picture Description Screws 7. Remove the screws of Stand BKLT. Lift up the Stand BKLT. 8. Remove the Bracket of Boards * Caution: Don’t force yourself on wall mount bracket during disassembly. It may be deformationed.
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3. Disassembly and Reassemble Description Picture Description Screws 9. Remove the screws on Panel. Reassembly procedures are in the reverse order of disassembly procedures. ※...
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.
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.
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.
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2. Product specifications CHANNEL FREQUENCY TABLE OUTPUT FREQUENCY : ANALOG fv:45.75MHz, fs:41.25MHz DIGITAL Fc:44MHz TUNING STEP SIZE : FIRST PLL 250KHz SECOND PLL 62.5KHz OSD CH NO CH NO CH NO CH NO Air-DTV Air-NTSC BAND Cable STD BAND Cable HRC Cable IRC 72.
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2. Product specifications OSD CH NO CH NO CH NO CH NO Air-DTV Air-NTSC BAND Cable STD BAND Cable HRC Cable IRC 499.25 ULTRA 498.00 499.25 505.25 ULTRA 504.00 505.25 511.25 ULTRA 510.00 511.25 517.25 ULTRA 516.00 517.25 523.25 ULTRA 522.00 523.25 529.25...
2. Product specifications 2-3. Spec Comparison to the Old Models Model Coral (LA40A450C1) Jasmin (LA40S86B) Design Display Type LCD TV LCD TV Built-in Tuner Resolution 1366 x 768 1366 x 768 LCD Panel TFT LCD Panel 50Hz TFT LCD Panel 50Hz Screen Size 40”...
(AAA x 2) BN59-00689A (A350) Power Cord 3903-00145 Cover-Bottom BN63-03665B BN68-01507J (A450) Owner’s Instructions BN68-01507Q (A350) Samsung Electronics Service center Cleaning Cloth BN63-01798A Warranty Card / Registration Card / Safety Guide Manual 6801-001011 (Not available in all locations) Stand Screw x 4...
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.
4. Troubleshooting 4-1-1. No Power The LEDs on the front panel do not work when connecting the power cord. The SMPS relay does not work when connecting the power cord. Symptom 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.
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Does the digital data appear at the Check a IC6001. output of LVDS (R6048~6045_FBE)? Change a main PCB ass’y Check a LVDS cable? Replace a lcd panel? Please, Call to Samsung Co. LTD. Caution Make sure to disconnect the power before working on the IP board.
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4. Troubleshooting 4-1-3. No Video (HDMI - Digital Signal) Symptom Audio is normal but no picture is displayed on the screen. Check the HDMI source Major Check the M-star checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
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4. Troubleshooting WAVEFORMS Digital Output Data Signal of HDMI(Data)
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[4] Does the signal appear at C5068 Change a main PCB ass’y. of IC5001? Check the LVDS cable? Replace the LCD panel? Please, Call to Samsung Co. LTD. Caution Make sure to disconnect the power before working on the IP board.
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Does the signal appear at C5064 Check a connection harness. or C5061 of IC5001? Check a LVDS cable ? Replcelcd panel? Please, Call to Samsung Co. LTD. Caution Make sure to disconnect the power before working on the IP board.
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4. Troubleshooting WAVEFORMS CVBS Output Signal 4-10...
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Does the Y/C signal appear at Check a connection harness. C5062or C5063 of IC5001? Check a LVDS cable ? Replcelcd panel? Please, Call to Samsung Co. LTD. Caution Make sure to disconnect the power before working on the IP board. 4-11...
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4. Troubleshooting WAVEFORMS Digital Output Data Analog Signal(Y,C) 4-12...
4. Troubleshooting 4-1-7. No Sound Symptom Audio is normal but no picture is displayed on the screen. Check the RF Source Major Check the M-star checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Connect a sound cable.
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4. Troubleshooting WAVEFORMS The Signal are Inputed to IC1201 The Signal are Inputed to IC1202 4-14...
4. Troubleshooting 4-2. Alignments and Adjustments 4-2-1. General Alignment Instuction Usually, a color LCD-TV needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync. Use the specified test equipment or its equivalent. Correct impedance matching is essential.
4. Troubleshooting 4-3. Factory Mode Adjustments 4-3-1 Entering Factory Mode To enter ‘Service Mode’ Press the remote -control keys in this sequence : - If you do not have Factory remote - control INFO MENU MUTE Power on - If you have Factory remote - control PICTURE ON DISPLAY FACTORY...
4. Troubleshooting 4-3-3 Factory Data Option Table(Service) WB Adjust Information Advanced Menu Checksum T-CRL32MEAM-**** HDCP Success Month/Day/Year/Hour/MIN/SEC Option Table(Service) Item Range Option Factory Reset Country(0x55) Default_0 Ready ON/OFF 19/22/23/26/27/32/37/40 Inch Option /42/46/50/52/57 Dimm Type INT/INT_NEG/EXT_POS/EXT_NEG/EXT/ 19AM_TN/22AU_TN/22CM_TN/26AM_AG/ 26AU_AG/26CM_NG/32AU_AG/32AU_NG/ Panel Type 40AU_AG 32CM_NG/32CM_AG/37AU_AG/37CP_AG/ 40AU_AG/40AM_AG Coral/Jade/Tanzanite/Pyrope/Amber...
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4. Troubleshooting Item Range Option Control WM Calib ON/OFF EDID Protect ON/OFF Edid Type Coral/P450-50HP/P450-42HP L12_1366_768 EDIE Write Failure/Success L12_1366_768 Succes WB Data Reset ON <-> OFF EEPROM Reset Logic Download ON <-> OFF PDP Filter 42” 3D PDP Group P34A_R3d Spread Spectrum ON/OFF...
4. Troubleshooting 4-4. White Balance - Calibration 4-4-1 White Balance -Calibration 1. Calibration 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 ...
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4. Troubleshooting Method of Color Calibration (AV) 1) Apply the NTSC Lattice (N0. 3) pattern signal to the AV IN 1 port 2) Press the Source key to switch to “AV1” mode 3) Enter Service mode 4) Select the “Calibration” menu 5) Select the “AV Calibration”...
4. Troubleshooting 4-4-3 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) 4-5. White Ratio (Balance) Adjustment You can adjust the white ratio in factory mode (1:Calibration, 3:White-Balance).
4. Troubleshooting 4-6-3 After S/W Upgrade How to Access Service Mode Entering Factory Mode <Power OFF> → <INFO> → <MENU> → <MUTE> → <Power ON> Factory Data Option Table(Service) WB Adjust Information Advanced Menu If you want to enter here, press “0000”. How to Initialize.
6. Wiring Diagram 6-3. Connector Functions Connector Functions Supply main power from SMPS to Main Board. * defective symptom : abnormal Picture CN1001 <-> CNM802 Supply dimming power from SMPS to Main Board. * defective symptom : abnormal Picture CN2101 <-> SPEAKER Connection Main Board and Speaker.