Samsung LS BM70 Series Repair Manual
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Samsung LS BM70 Series Repair Manual

Samsung LS BM70 Series Repair Manual

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Repair Guide
Basic Model
LS32BM702UNXGO
Applicable Model
LS**BM70*
Ver.1.1

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Summary of Contents for Samsung LS BM70 Series

  • Page 1 Repair Guide Basic Model LS32BM702UNXGO Applicable Model LS**BM70* Ver.1.1...

  • Page 2: Table Of Contents

    Contents 1. Precautions 1-1. Safety Precautions ..........................1-1 1-1-1. Warnings ..........................1-1 1-1-2. Servicing the Product ......................1-1 1-1-3. Fire and Shock Hazard ......................1-1 1-1-4. Product Safety Notices ......................1-2 1-2. Servicing Precautions ........................1-3 1-2-1. General Servicing Precautions ...................1-3 1-3. Electrostatically Sensitive Devices (ESD) Precautions ..............1-4 1-4.
  • Page 3 Samsung- authorized service provider. Any damage or defect to product resulting from a repair, or an attempt to repair, the product by any person other than a Samsung certified service provider will not be covered by the warranty.
  • Page 4 Samsung’s liability in any case shall be limited to the greatest extent permitted by law. Samsung reserves the right, at its sole discretion, to change, modify, add or remove portions of any part of this manual at any time. It is your responsibility to check the manual periodically for changes. Your use of the manual...

  • Page 5: Precautions

    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 6: Product Safety Notices

    Precautions 6. Observe the original lead dress, especially near the following areas: Antenna wiring, sharp edges, and especially the AC and high voltage power supplies. Always inspect for pinched, out-of-place, or frayed wiring. Do not change the spacing between components and the printed circuit board. Check the AC power cord for damage. Make sure that no wires or components touch thermally hot parts.

  • Page 7: Servicing Precautions

    Following the repair by a non-authorised service provider, self-repair or non-professional repair of the product, Samsung is not liable for any damage to the product, any injury or any other product safety issue caused by any attempt to repair the product which does not carefully follow these repair and maintenance instructions.

  • Page 8: Electrostatically Sensitive Devices (Esd) Precautions

    Precautions 1-3. Electrostatically Sensitive Devices (ESD) 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.

  • Page 9: Installation Precautions

    Precautions 1-4. Installation Precautions 1. For safety reasons, more than a people are required for carrying the product. 2. Keep the power cord away from any heat emitting devices, as a melted covering may cause fire or electric shock. 3. Do not place the product in areas with poor ventilation such as a bookshelf or closet. The increased internal temperature may cause fire.

  • Page 10: Disassembly And Reassemble

    This section of the service manual describes the disassembly and reassembly procedures for the Product. 1. Disconnect the Product from the power source before disassembly. 2. Follow these directions carefully. - Use the Samsung Open Jig and Cushion to remove the Rear Cover. • Open Jig Tool, Protection Cushion (curved models Only) CAUTION - Recommended Torque for Cabinet/Stand screws : 10 ~ 12kgf •...
  • Page 11 Disassembly and Reassemble • Loose the two screws and lift the stand.(32”) Remark ”...
  • Page 12 Disassembly and Reassemble • Loose the 4 screws and lift the stand. (43”) Remark...

  • Page 13: Cover Rear Disassembly

    Disassembly and Reassemble 2-2. Cover Rear Disassembly „ 32” Product • Put Open jig in the marked position of the picture. Remark BN81-14946B (Open Jig) • Enter and lift the Open jig in the indicated position, and secure space. Remark BN81-14946B (Open Jig)
  • Page 14 Disassembly and Reassemble Be careful not to damage the panel. Remark - Insert the OPEN JIG in the position where the triangle mark is located. You should not cross the bottom of the panel with OPEN JIG. BN81-14946B (Open Jig) •...
  • Page 15 Disassembly and Reassemble • Remove the COVER REAR by lifting the top. Remark • Decomposition complete. Remark 32”...
  • Page 16 Disassembly and Reassemble „ 43” Product • Put Open jig in the marked position of the picture. Remark • Enter and lift the Open jig in the indicated position, and secure space. Remark BN81-14946B (Open Jig) Be careful not to damage the panel. Remark - Insert the OPEN JIG in the position where the triangle mark is located.
  • Page 17 Disassembly and Reassemble • Lift the Locking Point using the Open Jig along the arrow direction of the figure. Remark BN81-14946B (Open Jig) • Decomposition complete. Remark 43”...

  • Page 18: Bracket-Stand Link & Bracket-Stand Link Top Disassembly (32" Only)

    Disassembly and Reassemble 2-3. Bracket-Stand Link & Bracket-Stand Link Top Disassembly (32” Only) • Release SCREW and separate the BRACKET-STAND LINK & BRACKET-STAND LINK TOP. Remark ※ Please disassemble the corresponding part of the screw using a manual driver. If you use the motor driver as an unreasonable torque, there is a risk of a screw hut. 32”...

  • Page 19: Assy Speaker Disassembly

    Disassembly and Reassemble 2-4. Assy Speaker Disassembly • Lift the two ASSY SPEAKERs and separate them. Remark 32” 43” 2-10...

  • Page 20: Smps Pcb Disassembly

    Disassembly and Reassemble 2-5. SMPS PCB Disassembly • Please check below before removing SMPS board. - As shown below, discharge SMPS using Samsung discharge equipment to each capacitor. Remark - In LED On state, discharge is completed when switching to OFF state.
  • Page 21 Disassembly and Reassemble • After performing Capacitor Discharge. 1) Remove all cables. 2) Remove one screw. 3) Gently lift the upper right corner of the board and push it down to remove the Remark board. * NOTE: When Installing the SMPS Board make sure its properly set in all mounting slots and fully locked into position.
  • Page 22 Disassembly and Reassemble • After performing Capacitor Discharge. 1) Remove all cables. 2) Remove one screw. 3) Gently lift the upper right corner of the board and push it down to remove the Remark board. * NOTE: When Installing the SMPS Board make sure its properly set in all mounting slots and fully locked into position.

  • Page 23: Main Pcb Disassembly

    Disassembly and Reassemble 2-6. Main PCB Disassembly „ 32” Product • Please remove all connected cables from board. Remark • Hold the board with both hands, and push it to the left to remove the board. Remark * Note: When installing the mainboard, correct in the mounting slot Please check if it is installed.
  • Page 24 Disassembly and Reassemble „ 43” Product • Please remove all connected cables from board. Remark • Hold the board with both hands and lift it gently. Remark • Slide down to remove the board. 2-15...

  • Page 25: Function Disassembly

    Disassembly and Reassemble 2-7. Function Disassembly „ 32” Product • Please remove the cable connected to the Tcon panel. Remark • Grab the fixed plastic module and gently lift it up and remove it. Remark 2-16...
  • Page 26 Disassembly and Reassemble „ 43” Product • Please remove the cable connected to the source board. Remark • Grab the fixed plastic module and gently lift it up and remove it. Remark 2-17...
  • Page 27 Disassembly and Reassemble • Complete. (32/43”) Remark 32” 43” • Reassembly procedures are in the reverse order of disassembly procedures. • The exterior may differ depending on the product. Note 2-18...

  • Page 28: Troubleshooting

    Troubleshooting 3. Troubleshooting 3-1. After Replacing Main Board ■ Setting TV into Factory Mode Samsung IR Remote (Limited Operation) 1. TV On 2. Press as follows. • Remote Button Info Factory AA81-00243B First Screen Appearing in Factory Mode Important Screen info: T-NKLAKUC-XXXX.XX...
  • Page 29 Troubleshooting MAIN : Option, MODE : SATELLITE, RES : NOSIGNAL Home Updates Exit Type 65Y6AU0SA Local Set SW MODEL UAU8000 Front Color AU8000B-U65AB1 SAMPLE Writing Fornt Color ■ Replacing Main Board When replacing Main Board, certain values needs to be manually input in Factory menu to complete the replacement. Steps to Replace Main Board (Example) 1.
  • Page 30 Troubleshooting ② Local Set : Set according to Local region(country) ③ SW Model : Check Label Rating of the TV(located on the Rear Cover) - SW Model is digits after “/” in Version No. Choose same SW Model code from the list. Home Updates Exit...
  • Page 31 Troubleshooting ④ Front Color :Check Label Rating of the TV Home Updates Exit Factory Reset Type 65Y6AU0SA Writing Type Local Set SW Model UAU8000 Front Color AU8000B-U65AB1 Writing Fornt Color Model Code UN65AU8000FXZA TUNER Ch Table NONE * Reference to Front Color list in the Factory Menu <"Front Color"...
  • Page 32 Troubleshooting ⑤ Model code :Check Label Rating of the TV Home Updates Exit Factory Reset SAMPLE Type 65Y6AU0SA Writing Type Local Set SW Model UAU8000 Front Color AU8000B-U65AB1 Writing Front Color Model Code UN65AU8000FXZA <Model Code digits exceeded > <Set Model Code> (over 19 digits)
  • Page 33 Troubleshooting ■ SVC - S/N - Writing S/N <Writing S/N : Check Label Rating of the TV > SAMPLE...

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