LG 42LN5700 Service Manual

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Contents of LCD TV Standard Repair Process Detail Technical Manual
No. Error symptom Content Page Remarks
1
A. Video error_ No video/Normal audio
Check LCD back light with naked eye A1
2 LED driver B+ 24V measuring method A2
3 Check White Balance value A3
4 Power Board voltage measuring method A5
6
A. Video error_ No video/Video lag/stop
TUNER input signal strength checking method A6
7 LCD-TV Version checking method A7
9
A. Video error_Color error
LCD TV connection diagram A8
10 Tuner Checking Part A9
11 Check Link Cable (LVDS) reconnection condition
A10
A11
A10 : 32/37/42/47/55
A11 : 32 AUO
12 Adjustment Test pattern - ADJ Key A12
13
A. Video error_Vertical/Horizontal bar,
residual image, light spot
LCD TV connection diagram A8
14 Check Link Cable (LVDS) reconnection condition
A10
A11
A10 : 32/37/42/47/55
A11 : 32 AUO
15 Adjustment Test pattern - ADJ Key A12
16
<Appendix>
Defected Type caused by T-Con/ Inverter/
Module
Exchange T-Con Board (1) A-1/5
17 Exchange T-Con Board (2) A-2/5
18 Exchange LED driver Board (PSU) A-3/5
55” : driver board
Other : PSU
19 Exchange Module itself (1) A-4/5
20 Exchange Module itself (2) A-5/5
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Only for training and service purposes
LGE Internal Use Only

LG 42LN5700 Specifications

General

Display diagonal	42 \
Native aspect ratio	16:9
Native refresh rate	60 Hz
LED backlighting type	-
Supported video modes	1080i, 1080p, 720p
Screen format adjustments	4:3
Supported graphics resolutions	1920 x 1080 (HD 1080)
Motion interpolation technology	TruMotion 120 Hz
3D	No
Photo effects	Cinema, Vivid
Playback modes	Zoom
Volume control	Digital
Audio decoders	Dolby Digital, Dolby Digital DTS
RMS rated power	20 W
Number of speakers	2
HDMI ports quantity	3
DVI-D ports quantity	0
USB 2.0 ports quantity	USB 2.0 ports have a data transmission speed of 480 Mbps, and are backwards compatible with USB 1.1 ports. You can connect all kinds of peripheral devices to them.
Component video (YPbPr/YCbCr) in	1
Consumer Electronics Control (CEC)	SimpLink
Smart modes	Cinema, Game
Lifestyle apps	Skype
Audio formats supported	AAC, AC3, MP3, PCM
Video formats supported	DIVX, DIVX HD, MPEG
Control type	Buttons
Product color	Black
Panel mounting interface	200 x 200 mm
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (standby)	0.3 W
Power consumption (typical)	41.4 W
Sustainability certificates	ENERGY STAR
Package depth	175 mm
Package width	1150 mm
Package height	659.8 mm
Package weight	14197 g

Weight and Dimensions

Depth (with stand)	234.9 mm
Height (with stand)	627.8 mm
Weight (with stand)	10704 g
Depth (without stand)	78.9 mm
Width (without stand)	967.9 mm
Height (without stand)	565.9 mm
Weight (without stand)	9616 g