Read LG 20LCD-H5 / 20L-510LT (CHASSIS:LJ71A) Service Manual online
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4. Total Assembly line process
4.1. Adjustment Preparation
- Above 30 minutes H/run in RF no signal
4.2. Confirm color coordinate of component
(1) Set Input to COMPONENT.
(2) Input signal : 480P
(2) Input signal : 480P
Full white 216/255 gray level (85 IRE Model : 212, Pattern :
78 at MSPG925L)
78 at MSPG925L)
(3) Set PSM : Dynamic / CSM : Cool
(4) Confirm whether x = 0.276±0.03, y = 0.283±0.03 or not.
(4) Confirm whether x = 0.276±0.03, y = 0.283±0.03 or not.
4.3. Confirm color coordinate of AV1
(1) Set Input to AV1
(2) Input signal : CVBS, NTSC-M
(2) Input signal : CVBS, NTSC-M
Full white 216/255 gray level (85 IRE, Model : 201, Pattern
: 78 at MSPG925L)
: 78 at MSPG925L)
(3) Set PSM : Dynamic / CSM : Cool
(4) Confirm whether x = 0.276±0.03, y = 0.283±0.03 or not.
(4) Confirm whether x = 0.276±0.03, y = 0.283±0.03 or not.
4.5. Other quality
- Confirm that each items satisfy under standard condition that
was written product spec.
- Confirm Video and Sound at each source
(1) Analog TV
- Select input Analog TV and check whether picture is
displayed or not.
(2) Terrestrial Digital TV
- Select input Terrestrial Digital TV and check whether
picture is displayed or not.
* Use ISDB-T Signal Generator(LG3802) and Stream
(Ch11, NHK1, Freq.473.143MHz) stored in the Generator.
Caution) It’s necessary to connect B-CAS CARD when you
check this source.
check this source.
(3) Satellite Digital TV (BS/CS)
Select input BS satellite Digital TV and check whether
picture is displayed or not.
picture is displayed or not.
Caution) It’s necessary to connect B-CAS CARD when you
check this source.
check this source.
(4) AV1
- Select input AV1 (CVBS) and whether picture is displayed
or not.
(5) AV2
- Select input AV2 (CVBS/S-video) and whether picture is
displayed or not
(6) COMPONENT
- Select input COMPONENT and whether picture is
displayed or not.
(7)HDMI
- Select input HDMI and whether picture is displayed or not
4.6. HDCP setting
(High-Bandwidth Digital Contents Protection)
- Connect HDMI cable to HDMI jack.
- Input HDCP key with HDCP-key-in-program.
- HDCP key value is stored on EEPROM(AT24C64) which
- Input HDCP key with HDCP-key-in-program.
- HDCP key value is stored on EEPROM(AT24C64) which
is E00~F20 addresses of 0xBC~0xBE page.
- AC off/on and on HDCP button of MSPG925 and confirm
whether picture is displayed or not of using MSPG925.
- HDCP key value is different among the sets.
4.7 DDC EDID Write
1) Connect HDMI Signal Cable to HDMI Jack.
2) Write EDID DATA to EEPROM(24C02) by using DDC2B
2) Write EDID DATA to EEPROM(24C02) by using DDC2B
protocol.
3) Check whether written EDID data is correct or not. (refer to
Product spec).
<DIGITAL DATA 256Byte>
4.8. Modem Communication check
4.9. Optical digital audio output(SPDIF) check
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