Hisense 50E77HQ Service Manual
  1. Manuals
  2. Brands
  3. Hisense Manuals
  4. LCD TV
  5. 50E77HQ
  6. Service manual

Hisense 50E77HQ Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

LCD Television
Service Manual
Chassis： MT9900
Version: V 1.0
Hisense Visual Technology Co.，Ltd.
November 19, 2021

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 50E77HQ and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Hisense 50E77HQ

Summary of Contents for Hisense 50E77HQ

  • Page 1 LCD Television Service Manual Chassis： MT9900 Version: V 1.0 Hisense Visual Technology Co.，Ltd. November 19, 2021...
  • Page 2 REVISION HISTORY Version Revise content Reviser Date V1.00 First issued Wangyue 2021-11-19 - 2 -...

  • Page 3: Table Of Contents

    Contents Contents ..................................- 3 - Service Manual ................................- 4 - 1. Precautions and notices ............................. - 4 - 1.1 Warning ..............................- 5 - 1.2 Notes ............................... - 7 - 2. TV boards: ..............................- 10 - 2.1 Main board layout ..........................- 10 - 2.2 TV boards part list ..........................

  • Page 4: Service Manual

    USE OF NON-AUTHORIZED PARTS WILL VOID THE MANUFACTURE'S WARRANTY Proper service and repair is important to the safe, reliable operation of all Hisense Equipment. The service procedures recommended by Hisense and described in this Service Guide are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose.

  • Page 5: Warning

    Ref. No. in the parts list. Use of non-manufacturer's recommended parts may create shock, fire, or other hazards. Under no circumstances should the original design be modified or altered without written permission from RCA. Hisense assumes no liability, express or implied, arising out of any unauthorized modification of design. Service tech assumes all liability.
  • Page 6 1.1.4 When replacement parts are required, be sure to use replacement parts specified by the manufacturer or have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock, or other hazards and will void the manufacturer's warranty.

  • Page 7: Notes

    (3) If a foreign substance (such as water, metal, or liquid) gets inside the panel module, immediately turn off the power. Continuing to use the product may cause fire or electric shock. (4) If the product emits smoke, and abnormal smell, or makes an abnormal sound, immediately turn off the power.
  • Page 8 • At all times other than when adjusting and checking the product, be sure to turn OFF the POWER Button and disconnect the power cable from the power source of the TV during servicing. • To prevent electric shock and breakage of PC board, start the servicing work at least 30 seconds after the main power has been turned off.
  • Page 9 problems resulting from scratches on the parts, the deformation of parts, and short-circuits due to residual electric charge. • Perform a safety check when servicing is completed. Verify that the peripherals of the serviced points have not undergone any deterioration during servicing. Also verify that the screws, parts and cables removed for servicing purposes have all been returned to their proper locations in accordance with the original setup.

  • Page 10: Tv Boards

    2. TV boards: 2.1 Main board layout 2.1.1 The top of main board (2RSAG7.820.11711) The rear of main board (2RSAG7.820.11711) - 10 -...
  • Page 11 - 11 -...
  • Page 12 2.2 Wiring diagram ( example for 55U69GEVS): XP1： Power for main board jacket Main board terminal Power board terminal definition definition BL_EN/SW BL_EN/SW1 DIMMING2/PWM2 DIMMING2/DIM1 DIMMING/PWM DIMMING/PWM1 VCC_A VCC_A/ VCCA1 VCC_A VCC_A/ VCCA1 3DEN-NC PWR-ON/OFF/ STB POWER ON/OFF/ STB1 - 12 -...
  • Page 13 12VS/ VCC2 12VS/ VCC3 12VS/ VCC1 12VS/ VCC2 12VS/ VCC2 12VS/ VCC3 XP14：51pin VBO to Tcon board Tcon Main board 定义 说明 Config Power Supply Input Voltage 12V-Panel Power Supply Input Voltage 12V-Panel Power Supply Input Voltage 12V-Panel Power Supply Input Voltage 12V-Panel Power Supply Input Voltage 12V-Panel...
  • Page 14 No Connection AGP R496,R484,R525 NC Ground MSE R814 OK，R482,R523NC HTPDN Vx1 HTP HTPDN V18 OK,R421 NC LOCKN Vx1 LOCK LOCKN V17OK,R423,C270 NC, R278,R277OK10k Ground Ground RX0N VX1 lane 0 C_VB1_1N RX0P VX1 lane 0 C_VB1_1P Ground RX1N VX1 lane 1 C_VB1_2N RX1P VX1 lane 1...
  • Page 15 Rxn10 V-by-One HS Data Lane 10 C_VB1_10N Rxp10 V-by-One HS Data Lane 10 C_VB1_10P Ground Rxn11 V-by-One HS Data Lane 11 C_VB1_10N Rxp11 V-by-One HS Data Lane 11 C_VB1_10P Ground Rxn12 V-by-One HS Data Lane 12 C_VB1_10N Rxp12 V-by-One HS Data Lane 12 C_VB1_10P Ground Rxn13...

  • Page 16: Tv Boards Part List

    Ties,clamps and tapes: To show the positions where ties and clamps and tapes should be, for checking after servicing.Before disassemble the TV ,besure to take photes for the TV assembly example for 55U69GEVS. 2.2 TV boards part list Main board Boards function difference For Series Main chassis type...

  • Page 17: Factory/Service Osd Menu And Adjustment

    3. Factory/Service OSD Menu and Adjustment 3.1 Remote Control - 17 -...
  • Page 18 - 18 -...

  • Page 19: Factory Osd Menu

    3.2 Factory OSD Menu figure -1 Factory OSD menu list: if you want to learn more about TV, you’d better read it but would not adjust the value please. The Factory menu may be have difference for diverse - 19 -...
  • Page 20 market and customer. Take 55U69GEVS for example. Options: Write keys: Note: Check whether the Key information under the current Version is OK, if appears “NG” or such as following red surround irregular information then need rewrite the key. - 20 -...
  • Page 21 Factory menu Description Remark White Balance data adjusting, different source has different WB values. Before adjusting, White Balance please change to desired source. channel init TV Produce signal preset, during the factory produce using. Option Items can choose Clear all initial the TV，EEPROM reset current software version information Soft version...
  • Page 22 Channel init huangdao old Qing Dao TV Produce signal preset, during the factory produce using. huangdao new …… - 22 -...
  • Page 23 "M" used in factory product. ToFAC Option "U" used in user state. LNB power 13/14;18/19;Power off Region Region choose country Country choose Logo Customer logo choose Language Language choose VCOM Panel voltage, UART On/off (when choose "on" then can serial port connect with Tool successfully) On/off PQ COM...

  • Page 24: Software Upgrading

    d. Restart the TV. e Also the Keys information must been checked, if appear “NG”, then must rewrite key code. 4. Software Upgrading 4.1 USB Upgrade Main software upgrade directly with USB The main software can be upgraded with USB disk. It includes two modes: user mode、 factory mode. Take for example.
  • Page 25 Firgure-1: Upgrading software Firgure-1 - 25 -...

  • Page 26: Flash Tool Upgrading

    4.2 Flash Tool upgrading First set program or if USB upgrades failure ,may causing TV crashed and SecureCRT no print message. If the above measures cannot use， repairers need to burn the boot program . Then USB disk to ”file. upgrade the“...
  • Page 27 Click , choose bootloader image, and the click 'upgrade' Then wait the upgrade finished. - 27 -...
  • Page 28 4.2.5 ”file.The file needs to changed name as USB disk to upgrade the“ usb_MTK_9900_EU.pkg ‘upgrade_loader.pkg’.Then open the TV and Open the SecureCRT in the meanwhile. clik 'ESC' into bootloader, DTV> set： eeprom.bw 0x38a 0xff 0x64 set: cu When the program finished, we need to change projectID Execute the following orders in DTV>...

  • Page 29: Trouble Shooting

    5. Trouble shooting 5.1 Troubleshooting for Remote Control Remote control does not work Try new batteries Replace battery Replace RC Replace remote control Check IR receiver Change Led & IR board Replace Led & IR BD Change Led & IR cable Replace Led &...

  • Page 30: Troubleshooting For Function Key

    5.2 Troubleshooting for Function Key Buttons does not work Check solder connections and see if Check switches any switches are stuck. Replace Key BD Check key board Check Key BD cable Change cable Replace main board - 30 -...

  • Page 31: Tv Won't Power On

    Work Replace Main Replace Main BD Power on Replace Panel (to contact Hisense tech support.) Replace Power BD Notice: MT9900 Europe market： TV work normally indication led is no light. TV standby indication led is red. - 31 -...

  • Page 32: Troubleshooting For Audio

    5.4 Troubleshooting for Audio No sound Reconnect Check connecter Replace speaker wire Check speaker wire Replace speaker set Check speaker set Replace main board Power Supply Board - 32 -...

  • Page 33: Troubleshooting For Tv/Vga/Hdmi Input

    5.5 Troubleshooting for TV/VGA/HDMI input No picture on the screen Check Signal Source Make sure signal source is available Reconnect Check connect Replace cable Check cable Replace main board - 33 -...

  • Page 34: Troubleshooting For Ypbpr Input

    5.6 Troubleshooting for YPbPr input No picture on the screen Check Source work or not Check Source Device Reconnect Check connect Check Wires (Green Blue, Red) Replace wires Replace main board - 34 -...

  • Page 35: Troubleshooting For Video Input

    5.7 Troubleshooting for Video input No picture on the screen Check Source work or not Check Signal Source Reconnect Check connect Replace Cable/Wires Check Cable/ Wires Replace main board - 35 -...

  • Page 36: Signals Block Diagram & Power Assign & Schematic Diagram

    6. Signals Block Diagram & power assign & schematic diagram - 36 -...
  • Page 37 - 37 -...
  • Page 38 - 38 -...

This manual is also suitable for:

55u8hq55e77hq65u7hq65u8hq55e7hq

Table of Contents

Save PDF