LeTV X50 air UN3016 User manual

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CLIENT/BRAND CUSTOMER MODEL
LeTV Letv X50 Air UN3016
SERVICE MANUAL

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Revision List
Version
Release Date
Revision Instructions
Customer Model TPV Model
A00 Apr.15,2015 Initial Release X50 Air UN3016 HK
E50E21NCEZLHNNK

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TABLE OF CONTENTS
1. Technology Specification ------------------------------------------------------------------------------------- 4
1.1 General Specification ---------------------------------------------------------------------------------------- 4
1.2 Input/ Output Specification ---------------------------------------------------------------------------------- 4
2. Operating Instructions ----------------------------------------------------------------------------------------- 5
2.1 TV set interface description ------------------------------------------------------------------------------- 5
2.2 The Use of Remote Control ------------------------------------------------------------------------------- 6
2.3 Connector description -------------------------------------------------------------------------------------- 7
3. Repair Flow Chart ------------------------------------------------------------------------------------------------ 8
4. Block Diagram ---------------------------------------------------------------------------------------------------- 13
4.1 Main board ---------------------------------------------------------------------------------------------------- 13
5. Schematic Diagram---------------------------------------------------------------------------------------------- 14
5.1 Main Board ---------------------------------------------------------------------------------------------------- 14
5.2 Power Board -------------------------------------------------------------------------------------------------- 15
5.3 KEY Board ---------------------------------------------------------------------------------------------------- 19
5.4 IR Board ------------------------------------------------------------------------------------------------------- 20
5.5 Driver Board -------------------------------------------------------------------------------------------------- 21
5.6 AC-PUSH Board --------------------------------------------------------------------------------------------- 22
6. Exploded View ---------------------------------------------------------------------------------------------------- 23
7. BOM ------------------------------------------------------------------------------------------------------------------ 25

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1. Technology Specification
1.1 General Specification
1.2 Input/ Output Specification
RGB INPUT SIGNAL TIMING
Dots × Lines Vertical Frequency (Hz)
Horizontal Frequency (kHz)
720 ×400 70.1 31.5
640 ×480 59.9 31.5
800 x 600 60.0 37.9
1024x768 60.0 48.363
1360x768 59.79 47.72
1400x900 60 55.93
1680x1050 60 65.29
1920x1080 60 67.50

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2.Operating Instructions
2.1 TV set interface description

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2.2 The Use of Remote Control

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2.3 connector description
D-sub
1 5
610
11 15
VGA (15pin D-sub) connector
Pin no description P in no description
1. Red Video 9. No Pin
2. Green Video 10. Sync Ground
3. Blue Video 11. RXD
4. RXD 12. TX Serial Data for DDC
5. Ground 13. H-Sync
6. Red Ground 14. V-Sync
7. Green Ground 15. RX Serial Clock for DDC
8. Blue Ground
HDMI
Pin no description Pin no
description
1 TMDS Data2+ 11 TMDS Clock Shield
2 TMDS Data2 shield 12 TMDS Clock-
3 TDMS Data2- 13 CEC
4 TMDS Data1+ 14 Reserved (N.C. on device)
5 TMDS Data1 shield 15 SCL
6 TMDS Data1- 16 SDA
7 TMDS Data0+ 17 DDC/CEC Ground
8 TMDS Data0 shield 18 +5V Power
9 TMDS Data0- 19 Hot Plugs Detect
10 TMDS Clock+

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3. Repair Flow Chart
No power (LED “Off”)
Check the AC input and the
power is “ON”? Power “On”
Check the IR board and LED
Replace the IR board
Replace the main board
Power board output=12V? Replace the power board
No
Yes
No
Yes
No

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Abnormal Display
Reset the source
Check the source
Check the panel
Replace the main board
Replace the LVDS cable
Replace the panel
No
No
No
Yes
Yes
Yes
No
No
Check the main board
Enter factory mode to do
“EEPROM initial”&“Reset”
Check the LVDS cable

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No
Check the cable between the
speakers and main board is OK?
No sound or sound abnormal
Check the TV is muted, adjust the
volume or enter the menu to reset?
Reinsert the audio cable or
change the TV system
Replace the cable
Replace the speaker
Replace the main board
No
Yes
Check the speaker resistance value is in spec
(Remark: The value is marked on the speaker)?
Check the audio source connection
and the TV system are correct?
Yes
No
Yes
No
Enter factory mode to do “Reset”
No