LG Electronics 32LC2D(B) TROUBLESHOOTING AV1, 2, 3, 4/S-Video, Volume level Of, AV1,AV2 ,AV3

Page 27

TROUBLESHOOTING AV1, 2, 3, 4/S-Video

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TROUBLESHOOTING AV1, 2, 3, 4/S-Video

Push the POWER

Turn OFF the Mute

Increase the Volume

Correct them

ON key

YES

Check

the Condition

Is

Is the

Is the

of all Connectors,

No Audio

Volume level Of

wafers, I2C In

Set ON?

Mute ON?

the set 0?

corresponding

Signal

flow?

Check the

AV1,AV2 ,AV3,

Check the interfacing ciruit of

AV4/S-Video L/R signal

AV1,2,3 and AV4/S-Video

across R136-138, R135-137,

Replace NSP

accordingly w.r.t the mode.

R157-158, R174-175 respectively

according toThe

corresponding mode

On jack board

Check the

Check

3.3V supply across

PWM output of NSP

L402 and 1.8V at

across R436-439

C448

Check the

Power error or

AV L/R output

replace CXA2069

At R377,376

Power Error

Replace the MSP

Check the

Check the

Check

Check 18V

Amplifier output level

supply voltage 8V

audio output at MSP

supply at L421

At L423-426

across L403

across R429-431.

There may be some

Replace

error in Audio

TAS5122(amp)

source.

Power Error

Image 27

Contents SERVICE MANUAL READ THE SAFETY PRECAUTIONS IN THIS MANUALCHASSIS LD61A FACTORY NAME 32LC2DB-EC/37LC2DB-EC/42LC2DB-EC BEFORE SERVICING THE CHASSISSPECIFICATION CONTENTSCONTENTS PRODUCT SAFETYLeakage Current Hot Check circuit SAFETY PRECAUTIONSIMPORTANT SAFETY NOTICE General GuidanceElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSPower Output, Transistor Device Removal/Replacement IC Remove/ReplacementReplacement Small-Signal Discrete Transistor Removal/Replacement1.General SpecificationTV SPECIFICATIONreatment of the front polarizer 2. General Specification4.Component Video Input Y, PB, PR 3.Optical FeatureLCD Module5. 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 Table 1 Scart Arrangement 1.Full Scart 7. Mechanical specification8. Mechanical specification 32LC2DTable 2 Scart Arrangement 2.Half Scart 3. Channel Memory ADJUSTMENT INSTRUCTION2. Specification 1. Application RangePanel size selection 5. Select method of Panel size6. ADC Calibration Before AV ADC Calibration, should be executed theCool11000K - x 0.274±0.003, y 0.286±0.003 7. White BalanceBefore White-balance, the AV ADC should be done Case1 EC and FC model use PAL-BGDHI composite signalFUNTION SVC REMOCONTROUBLESHOOTING No image attached? Is the input cableNo image PASS No image No image No image No image No image AV1,AV2 ,AV3 TROUBLESHOOTING AV1, 2, 3, 4/S-VideoVolume level Of AV4/S-Video L/R signalTROUBLESHOOTING DTV/HDMI-Audio TROUBLESHOOTING RF/Component/PC FFC Wafer BLOCK DIAGRAMMainTDFB-G236P DVB/PAL WaferSound processor BLOCK DIAGRAMJackAUDIO/VI DEO SW CXA2069Q010 020050 EXPLODED VIEW32LC2DDESCRIPTION EXPLODED VIEW PARTS LIST32LC2DEXPLODED VIEW37LC2D EXPLODED VIEW PARTS LIST37LC2D 020080 130030 150 090 EXPLODED VIEW42LC2DEXPLODED VIEW PARTS LIST42LC2D REPLACEMENT PARTS LIST MAIN BOARDCAPACITOR DATE 2006. 05 DATE 2006. 05 DATE 2006. 05 DIODEs COIL & CORE & INDUCTOR RESISTORs TRANSISTORDATE 2006. 05 DATE 2006. 05 DATE 2006. 05 DATE 2006. 05 JACK BOARD OTHERsDATE 2006. 05 COIL & CORE & INDUCTOR DIODEsRESISTORs TRANSISTORDATE 2006. 05 CONTROL BOARD IR/LED BOARD SIDE A/V BOARDPage Page Page Page Page Printed in Korea P/NO 38289S0043