LG 24MT47VC, Service Manual

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LGE Internal Use Only
Copyright © LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.3. Function Check
4.3.1. Check display and sound
*Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (SCART/CVBS)
3) COMPONENT (480i)
4) HDMI( 22inch - PC : 1920 x 1080 @ 60Hz, 24/28inch - PC :
1366 x 768 @ 60Hz )
* Display and Sound check is executed by Remote controller
*SCART(MT47DC only support)
*Composite/Component(MT47VC only support)
→ Caution : Not to push the INSTOP KEY after completion if the
function inspection.
4.3.2. PCMCIA CARD Check
You must adjust DTV 29 Channel and insert PCMCIA CARD
to socket.
- If PCMCIA CARD works normally, video signals will appear
on screen.But it works abnormally, "No CA module" will ap-
pear on screen.
→ Caution: Set up "RF mode" before launching products.
4.4. White balance adjustment
-Equipment
1) Color Analyzer: CA-210 (LED Module : CH 14)
2) Adj. Computer(During auto adj., RS-232C protocol is
needed)
3) Adjust Remocon
*RGB Gains are fixed data for each model.
Insert RS-232C Jack which is connected with PC for White
Balance or equivalent device.
→ Total Assembly line should be check whether the color
coordinate(x,y) data refer to below table were meet or not.
- Cool Panel
Color
Temperature
Cool 9,300 °K X=0.276 (±0.04)
Y=0.275 (±0.04)
<Test Signal>
Inner pattern
(204gray,80IRE)
Medium 8,000 °K X=0.290 (±0.04)
Y=0.298 (±0.04)
Warm 6,500 °K X=0.318 (±0.04)
Y=0.334 (±0.04)
Luminance
(cd/m²)
Cool Min : 80 Typ : 110 <Test Signal>
Inner pattern
(204gray,80IRE)
Medium Min : 80 Typ : 110
Warm Min : 70 Typ : 110
*Note : x,y coordinates are drifted about 0.007 after 30 mins
heat-run. So checking color coordinate within 5-min at
total assembly line, consider x,y coordinates might be
up to 0.007 than x,y target of each color temperature.
*Note : Manual W/B process using adjusts Remote control.
1) After enter Service Mode by pushing "ADJ" key,
2) Enter "White Balance" by pushing "►" key at "White Bal -
ance".
* When doing Adjustment, Please make circumstance as
below.
4.5. DPM Operation check
■ Measurement Condition: 100~240V@ 50/60Hz
1) Set Input to HDMI (with Input Label set to PC) and connect
HDMI cable to set – HDMI Mode
2) Cut off H sync or V sync of signal.
3) Check DPM operation refer to the below table.
Operating Condition Sync
(H/V)
Video LED
(SET)
Wattage
(W)
Power S/W On Sleep mode -
RGB,HDMI
Off/Off Off Amber 1
4.6. Model Name & SW Version & Adjust check.
* Press the ‘Instart’ key of ADJ remote controller
4.6.1. Model Name& SW Version Check
1) Check ‘Model Name’.
2) Check ‘S/W Version’ (Refer to the IC Ver. in the BOM)
4.6.2. Adjust Check
1) Check ‘Country Group’
2) Check ‘Area Option’
3) Check ‘Tool Option’ (Refer to the BOM Comments)
4) Check ‘EDID[RGB&HDMI]’ is OK.
* After check all, Press the 'EXIT' key of ADJ remote controller
to go out SVC menu.
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