Read LG 55LP1M-WC (CHASSIS:CL-80) Service Manual online
3.2.5 Color coordinates Adjustment and brightness
Adjustment (AV input)
3.2.5.1 Color coordinates adjustment provisions:
■Adjusting Each color coordinate and Black level
EZ Video : Standard
ACC : Normal
■Input signal :
Adjust after input signal of PAL MODE l ,because
major sales area is EU.
PAL:CVBS(576i), 576i (HDTV port), 1080i / 60Hz
(HDTV port ) it Adjusts 3 Modes.
■Before Adjustment It shows a "PRESET
ADJUSTMENT START" message. And adjustment
begins.
3.2.5.2 Black level adjustment (Bias adjustment) :
■The input is 1080i/60Hz signal in Component 1 input
and 16/255 Gray Level.
Brightness Range 0.9~1.1 cd/m2, In the Sub Bright
(0x86) In order to hold the variable brightness.
*Reference : With CVBS input & COMPONENT1 INPUT
576i It is not with from Adjustment. It does default setting
for this value.
3.2.5.3 White Level Adjustment (Gain Adjustment)
■The Display is 240/255 Gray Level.
■For Adjustment the R Gain is fixed at 100, to adjust
■For Adjustment the R Gain is fixed at 100, to adjust
G/B gain , the color coordinates
■ 55LP1M-WC (x = 0.283±0.010, y = 0.298±0.010)
(G Gain is variable ,its range is 0 ~ 100)
■Only when the G gain goes over 100 it fixes the G
gain 100 and R/B gain is variable
■It makes the color coordinate. (Generally only R gain
Or G gain is fixed to 100)
3.2.5.4 Gray Scale Check
■The input can be 3 modes PAL : CVBS(576i) , 576i
(HDTV port), 1080i (HDTV port ).
■For each mode 16 GREY pattern is displayed
■Check 0 level is not displayed and 1/16 Grey is
■Check 0 level is not displayed and 1/16 Grey is
displayed.
■The 15/16 Gray and 16/16 Gray are checked
separately.
3.2.6 Operation condition check
3.2.6.1 Operational mode: Every mode, which is in
specification, is checked that it is accurate and are
operated.
3.2.6.2 Adjustment condition and operation check:
Satisfactory yes or no adjustment of screen
adjustment standards
■Analog/Digital screen condition check: From lower
part mode screen condition good yes or no check
Designation mode : 640x350 (70Hz) - 1 mode,
800x600 (75Hz) - 2 mode,
1024x768(60Hz) -12 mode,
1280x768(60 Hz)-13 mode
The input selection time is 8 seconds after key is
pressed and Analog or Digital display comes on the
screen.
3.2.6.3 H/V Position, Clock, Clock Phase and Auto
Calibration operation check
■The Mode 13 (1280*768,60Hz) 1line from on/off
pattern H/V Position and the Clock, Clock Phase it is
variable each and it is checked it operates normally
■The Clock, Clock phase are adjusted by auto
calibration when they have become variable. They
are checked.
3.2.6.4 Color operation check: 9300K, 6500, 3600K ,USER
COLOR are checked for normal operation.
■It is checked that 9300 and USER COLOR setting
are same.
Other quality : Satisfactory yes or no adjustment
against each item from the standard
condition which is written clearly in the
product specification
(1) Each SOURCE image and Sound check
■A/V : supports NTSC, PAL
3.2.6.5 Audio Spec
Speaker: 8ohm
INPUT(PC AUDIO) : 0.7Vrms , OUTPUT : (Commercial :
10W, 55" FIDA : Mono 15W)
INPUT(A/V) : 0.4Vrms(NTSC), 0.5Vrms(PAL), OUTPUT :
(Commercial : 10W, 55" FIDA : Mono 15W)
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