LG 70LA8610-TA / 70LA860Y-TA (CHASSIS:LB34D) Service Manual ▷ View online
3. DTCP?
[DTCP]
The Digital Transmission Content Protection Specification defines a cryptogrphic
protocol for protecting audio/video entertainment content from unauthorized copying,
intercepting, and tampering as it traverses digital transmission mechanisms such as a
high-performance serial bus that conforms to the IEEE 1394-1995 standard. Only
legitimate entertainment content delivered to a source device via another approved copy
protection system (such as the DVD Content Scrambling System) will be protected by this
protection system.
[Three cryptographic Keys]
• Authentication Key which is formed as a result of authentication and used to protect the
exchange keys.
exchange keys.
•Exchage Key which is used to set up and protect content streams.
•Content Key which is used to encrpt the content being exchanged.
4. Changed BOM
Changed Item
: Separate HDCP check box.
- HDCP 2.0 Tx
- HDCP 2.0 Rx
- HDCP 1.4 Rx
As-Was
Current
Contents of LCD TV Standard Repair Process
No.
Error symptom (High category)
Error symptom (Mid category)
Page
Remarks
1
A. Video error
No video/Normal audio
1
2
No video/No audio
2
3
Picture broken/ Freezing
3
4
Color error
4
5
Vertical/Horizontal bar, residual image, light
spot, external device color error
spot, external device color error
5
6
B. Power error
No power
6
7
Off when on, off while viewing, power auto
on/off
on/off
7
8
C. Audio error
No audio/Normal video
8
9
Wrecked audio/discontinuation/noise
9
10
D. Function error
Remote control & Local switch checking
10
MR13 operating checking
11
11
12
Wifi operating checking
12
13
Camera operating checking
13
14
External device recognition error
14
15
E. Noise
Circuit noise, mechanical noise
15
16
F. Exterior error
Exterior defect
16
First of all, Check whether there is SVC Bulletin in GCSC System for these model.
Normal
audio
Y
N
Move to No
video/No audio
No video
Normal audio
Check Back Light
On with naked eye
On
Y
N
Check Power
Board
24V, 12V,3.5V etc.
Normal
voltage
Y
N
Replace T-con Board
or module
And Adjust VCOM
Repair Power
Board or parts
Check Power Board 24V output
Normal
voltage
voltage
Y
Replace Inverter
or module
N
Repair Power
Board or parts
End
Always check & record S/W Version and White
Balance value before replacing the Main Board
Replace Main Board
Re-enter White Balance value
※Precaution
Established
date
Standard Repair Process
Revised date
1/16
LCD TV
Error
symptom
A. Video error
No video/ Normal audio
☞A18
☞A1
☞A18
☞A4 & A2
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D
↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)
1
2013.03.05
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