Samsung QN Q900R Series Repair Manual
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Samsung QN Q900R Series Repair Manual

Samsung QN Q900R Series Repair Manual

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Repair Guide
Basic Model
QN55Q900RBFXZA
Applicable Model
QN**Q900R*
Ver.1.0

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Summary of Contents for Samsung QN Q900R Series

  • Page 1 Repair Guide Basic Model QN55Q900RBFXZA Applicable Model QN**Q900R* Ver.1.0...

  • 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 LED TV. 1. Disconnect the LED TV 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)
  • Page 11 Disassembly and Reassemble Description & Screws Picture Description Insert open jig to points and lift up Gently lift up the Rear Cover from the bottom corners to release all mounting clips as indicated by Red Rectangles. If tabs break, Using Back cover as it is. Locking tabs locations Remove the BT/WIFI module from Source Cover(1).
  • Page 12 Disassembly and Reassemble Description & Screws Picture Description Remove USI-T cables(A) and Function cable(B) on TV board. Remove the power cable(A), (B) on Power board. Remove the power cable(C) on TV Board Remove the power cable(A) on Power board. Remove the power cable(B) on TV Board Remove the ffc(SPI)(A) on Power board.
  • Page 13 Disassembly and Reassemble Description & Screws Picture Description Removing LD/ SMPS board ② - Remove each FFC Cable(BLU) (1) ① - Undo 8 screw points(2) Removing Main board - Undo 4 screw points NOTE Reassembly procedures are in the reverse order of disassembly procedures.

  • Page 14: One Connect Disassembly

    Disassembly and Reassemble 2-2. One Connect Disassembly Description & Screws Picture Description Remove the 3 screws from ASSY COVER P-OC BOTTOM. Screws 6003-000282 SCREW-TAPTYPE : M3 x L8, ZPC(BLK) • C/BOTTOM+C/TOP Use the Open Tool to unlock each corner. Open Jigs •...
  • Page 15 Disassembly and Reassemble Description & Screws Picture Description Remove the Cables. CNM803(26Pin) LEAD CONNECTOR-POWER Remove the 5 screws at each marked screw location on the board. Screws 6003-000282 SCREW-TAPTYPE : M3 x L8, ZPC(BLK) • SMPS+S/TOP Lift off the black Insulator Sheet taped to the plate assembly at "PULL"...
  • Page 16 Disassembly and Reassemble Description & Screws Picture Description Remove the 4 screws on the One Connect Board. Screws 6003-000282 SCREW-TAPTYPE : M3 x L8, ZPC(BLK) • MAIN BOARD+C/BOTTOM Completed the disassembly. NOTE Reassembly procedures are in the reverse order of disassembly procedures.

  • Page 17: Troubleshooting

    Troubleshooting 3. Troubleshooting 3-1. After Replacing Main Board ■ Setting TV into Factory Mode Samsung IR Remote (Limited Operation) 1. TV Power Standby. 2. Press as follows. • Remote Button Info - Factory Factory Remote (AA81-00243B) First Screen Appearing in Factory Mode Important Screen info: T-NKLAKUC-XXXX.XX...
  • Page 18 Troubleshooting MAIN : Option, MODE : SATELLITE, RES : NOSIGNAL Home Updates Exit Type 55K6AU0SB Local Set SW MODEL UCU8000 Front Color UCU8000 - U55CB2 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 19 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 20 Troubleshooting ④ Front Color :Check Label Rating of the TV Home Updates Exit Factory Reset Type 55K6AU0SB Writing Type Local Set SW Model UCU8000 Front Color UCU8000 - U55CB2 Writing Fornt Color Model Code UN55CU8000FXZA TUNER Ch Table NONE * Reference to Front Color list in the Factory Menu <"Front Color"...
  • Page 21 Troubleshooting ⑤ Model code :Check Label Rating of the TV Home Updates Exit Factory Reset SAMPLE Type 55K6AU0SB Writing Type Local Set SW Model UCU8000 Front Color UCU8000 - U55CB2 Writing Front Color Model Code UN55CU8000FXZA <Model Code digits exceeded > <Set Model Code>...
  • Page 22 Troubleshooting ■ SVC - S/N - Writing S/N <Writing S/N : Check Label Rating of the TV > SAMPLE...

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