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Legamaster PTX-8500 UHD Service Manual

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Service Manual: PTX8500 UHD
Legamaster
Service Manual
Model No.: PTX-8500 UHD
Page 1/21

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Summary of Contents for Legamaster PTX-8500 UHD

  • Page 1 Service Manual: PTX8500 UHD Legamaster Service Manual Model No.: PTX-8500 UHD Page 1/21...

  • Page 2: Revision History

    Service Manual: PTX8500 UHD Revision History Version Date Page Section Description V1.0 2015.01.16 First issued V2.0 2015.04.29 Change PSU (11012436001-AA) Page 2/21...
  • Page 3 Service Manual: PTX8500 UHD HANDLING GUIDE This 85” monitor is over 100KG in weight, there for two (2) eye-Bolt attachment locations have been placed on top on the unit, you can use the eye-Bolts provided (in the accessory box) to hang up this monitor. The installation of the hooks as below photo, we strongly recommend to follow this method to hang up this monitor.

  • Page 4: Repair Tools

    Service Manual: PTX8500 UHD 1. Repairing Condition 1.1. Repair Tools List the type and size of the tools that would typically be used to disassemble the product to a point where components and materials requiring selective repair can be removed. Item Tool Description Tool Size (if applicable)
  • Page 5 Service Manual: PTX8500 UHD 2. Access to the key components 2.1. Panel 2.1.1. Remove the Rear Cover Page 5/21...

  • Page 6: Remove The Bezel

    Service Manual: PTX8500 UHD 2.1.3. Remove the Bezel 2.1.4 . Panel BKT (24 s crews) Page 6/21...
  • Page 7 Service Manual: PTX8500 UHD 2.2. A/D board (If you only replace A/D board, just take off A/D board cover) A/D board cove r 2.3. Power board (If you only replace Power board, just take off Power board cover) Power board co ver Page 7/21...

  • Page 8: Parts Descriptions

    Service Manual: PTX8500 UHD 3. Parts descriptions 3.1. Module Page 8/21...
  • Page 9 Service Manual: PTX8500 UHD Part No. Name Descriptions 10050850001-AA 85” Panel LCD Module. (include LCD panel, Backlight and inverter) 11347003911-AB IR board Infrared receiver and LED. 11347005851-AB Keypad OSD Keypad board 11347006541-AB Ethernet Board Ethernet Remote Control Board 11347008963-CA Docking board OPS Docking board 11341674101-AA MEMC board PANEL MEMC board from Panel module...
  • Page 10 Service Manual: PTX8500 UHD 3.2. Wiring 3.2.1. Wiring for PCBA Page 10/21...
  • Page 11 Service Manual: PTX8500 UHD OPS Dockingboard Page 11/21...
  • Page 12 Service Manual: PTX8500 UHD Part No. Name Descriptions 11067026431-AA IR Wire IR Board to AD Board 11067026421-AB Keypad Wire Keypad to AD Board 11060175141-AA RC Wire AD board to Ethernet board (6P-6P) 11060175141-AA RC Wire AD board to Docking board (6P-6P) 11067005431-AA Control wire AD board to Docking board...

  • Page 13: Troubleshooting

    Service Manual: PTX8500 UHD 4. Troubleshooting Defect Checking Code Symptom Actions 1.Check AC power source, power cord and AC switch. If PSU abnormal then swap PSU R500 No Power 2.Check PSU else Swap AD board. 3.Check normal booting.(Refer to page24-Q2) 1.Check PSU Swap PSU 2.Check normal booting.(Refer to page 24-Q2)
  • Page 14 Service Manual: PTX8500 UHD Image retention LCM replace Vertical line defect LCM replace Horizontal line defect 1. Check video source and cable connection. LCM replace No backlight ( an side 1. Check PSU Swap PSU. Swap LCM backlight has failed) 2.
  • Page 15 Service Manual: PTX8500 UHD 4.1. Check PSU Functions 4.1.1. 11012413061-AA Page 15/21...
  • Page 16 Service Manual: PTX8500 UHD Connector Descriptions REF. ID PIN# SIGNAL REF. ID PIN# SIGNAL REF. ID PIN# SIGNAL REF. ID PIN# SIGNAL 24VDC 24VDC P801 BL ON 24VDC 24VDC PW ON 24VDC 24VDC 24VDC 24VDC 24VDC 24VDC 5.2VS 5.2VS P803 P804 P802 12VDC...
  • Page 17 Service Manual: PTX8500 UHD 1. Check the FUSE is OPEN or SHORT. Turn off the power Check the FUSE If the FUSE is “SHORT”(0Ω) then go to step2 If the FUSE is “OPEN” then replacement a new FUSE Turn on the power 5 seconds then go to step a.
  • Page 18 Service Manual: PTX8500 UHD 4.1.2. 11012436001-AA Output Input Connector Descriptions REF. ID PIN# SIGNAL REF. ID PIN# SIGNAL AC/L RC- & GND Input AC/R +5Vss Output +24V +24V Page 18/21...
  • Page 19 Service Manual: PTX8500 UHD 4.2. Check the Versions of SubMCU and Firmware There are two types of firmware in the monitor. One is the SubMCU and the other is the firmware of the AD Board Check firmware / SubMCU version on menu (“Information”). Step1.
  • Page 20 Service Manual: PTX8500 UHD Q2. How to check the normal booting of the monitor. Ans.: Step1. Disconnected all video cable.(VGA, DVI, Audio,…etc.) Step2. Connect the AC power cord only. Step3. Turn on the AC switch. The normal boot status as Fig. A Fig.
  • Page 21 Service Manual: PTX8500 UHD Q3. How to check the normal screen of the monitor.(Test mode) Ans.: Press RCU Key “Exit” or OSD key “Menu/Exit” for more than five seconds The normal screen status as Fig. B Fig. B Q4. How to update the firmware? Ans.: Refer to firmware update SOP.

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