LG Electronics 32LC2D(B), 37LC2D(B), 42LC2D(B) service manual No image

Page 18
Manual background

No image

Is the

YES

Is the input

NO Attach the input

 

 

 

Set ON?

 

cable attached?

cable(s)

 

 

 

 

 

 

 

 

 

NO

 

YES

 

 

 

 

 

 

Push the POWER

 

 

 

 

 

 

 

ON key

 

Check the

 

What is

 

 

Power Error

 

 

 

Condition of all

PASS

 

 

 

 

 

 

 

 

 

 

 

Connectors, wafers,

 

the input signal

 

 

 

 

 

 

I2C In the

 

mode?

 

 

FAIL

 

 

 

system.

 

 

 

 

 

 

 

 

 

 

 

Check CVBS

FAIL

Check 3.3V

 

 

 

 

 

AV1

Signal at R103

 

At L110 on jack

 

 

 

 

 

 

of jack board

 

board

 

 

 

 

 

 

PASS

 

PASS

- 18

 

 

 

 

 

 

 

Replace Jack board

-

 

PASS

Check 24bit

PASS

 

 

 

Check LVDS

Check Main_V

Check Sub_V

 

 

 

 

 

 

 

RGB at AR700-

 

 

 

 

Output of Cortez

 

 

At R309

At R302

 

 

PASS

 

AR705

 

 

 

 

 

 

 

 

 

 

Check for S/W error

FAIL

 

FAIL

 

FAIL

 

 

 

 

 

 

 

 

 

 

Replace Cortez

 

 

 

Check Q303

 

 

 

 

 

 

Check Power

 

PASS

 

 

 

 

 

 

Circuit and 9V

 

 

 

 

 

Levels and crystal

 

Replace CXA2069

 

 

 

 

 

at L300

 

 

 

 

PASS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Hudson

FAIL

 

FAIL

Correct the circuit

 

 

 

 

 

 

 

Power Error

 

 

 

 

 

Image 18
Contents BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUALCHASSIS LD61A FACTORY NAME 32LC2DB-EC/37LC2DB-EC/42LC2DB-EC SERVICE MANUALPRODUCT SAFETY CONTENTSCONTENTS SPECIFICATIONGeneral Guidance SAFETY PRECAUTIONSIMPORTANT SAFETY NOTICE Leakage Current Hot Check circuitSERVICING PRECAUTIONS Electrostatically Sensitive ES DevicesSmall-Signal Discrete Transistor Removal/Replacement IC Remove/ReplacementReplacement Power Output, Transistor Device Removal/ReplacementSPECIFICATION 1.General SpecificationTV2. General Specification reatment of the front polarizer3.Optical FeatureLCD Module 4.Component Video Input Y, PB, PR5. RGB PC INPUT Mode Table 6. RGB DTV INPUT Mode TableRGB-PC EDID DATA 7. HDMI INPUT Mode Table 8. HDMI DTV Mode TableHDMI EDID DATA 32LC2D 7. Mechanical specification8. Mechanical specification Table 1 Scart Arrangement 1.Full ScartTable 2 Scart Arrangement 2.Half Scart 1. Application Range ADJUSTMENT INSTRUCTION2. Specification 3. Channel MemoryBefore AV ADC Calibration, should be executed the 5. Select method of Panel size6. ADC Calibration Panel size selectionCase1 EC and FC model use PAL-BGDHI composite signal 7. White BalanceBefore White-balance, the AV ADC should be done Cool11000K - x 0.274±0.003, y 0.286±0.003SVC REMOCON FUNTIONTROUBLESHOOTING No image Is the input cable attached?No image PASS No image No image No image No image No image AV4/S-Video L/R signal TROUBLESHOOTING AV1, 2, 3, 4/S-VideoVolume level Of AV1,AV2 ,AV3TROUBLESHOOTING DTV/HDMI-Audio TROUBLESHOOTING RF/Component/PC Wafer BLOCK DIAGRAMMainTDFB-G236P DVB/PAL FFC WaferCXA2069Q BLOCK DIAGRAMJackAUDIO/VI DEO SW Sound processorEXPLODED VIEW32LC2D 010 020050EXPLODED VIEW PARTS LIST32LC2D DESCRIPTIONEXPLODED VIEW37LC2D EXPLODED VIEW PARTS LIST37LC2D EXPLODED VIEW42LC2D 020080 130030 150 090EXPLODED VIEW PARTS LIST42LC2D REPLACEMENT PARTS LIST MAIN BOARDCAPACITOR DATE 2006. 05 DATE 2006. 05 DATE 2006. 05 DIODEs COIL & CORE & INDUCTOR TRANSISTOR RESISTORsDATE 2006. 05 DATE 2006. 05 DATE 2006. 05 DATE 2006. 05 OTHERs JACK BOARDDATE 2006. 05 DIODEs COIL & CORE & INDUCTORTRANSISTOR RESISTORsDATE 2006. 05 CONTROL BOARD SIDE A/V BOARD IR/LED BOARDPage Page Page Page Page P/NO 38289S0043 Printed in Korea