LG 32LG6000 (CHASSIS:LD89A) Service Manual ▷ View online
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1-2. In case of No Power
(1) Symptom
1) It does not charge at module.
2) Front LED does not work.
2) Front LED does not work.
(2) Check the followings
A power cord is plugged in with TV set?
Plug the power cord in.
Is AC-INLET Cable(Red+Blue) connected with th PSU?
Connect the AC-INLET Cable.
Yes
No
No
Are the fuses(F100, F101 or F700) OK on the PSU?
(check open or short status with Multi-meter)
(check open or short status with Multi-meter)
Replace the fuse.
Yes
No
Is the PSU connected with Main Board though a 24pin cable?
Connect a 24p cable to PSU to Main(P1000)pin.
Yes
Measure output voltages(16V, 12V, 5V) on the PSU.
-> [Main P1000] pin1,2:16V; pin(5,6):12V; pin(9~12):5V;
If the measured values are not a proper value, replace PSU.
-> [Main P1000] pin1,2:16V; pin(5,6):12V; pin(9~12):5V;
If the measured values are not a proper value, replace PSU.
Yes
No
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NG : always RED
No problem
No problem
Check LED A’ssy color.
Check remote control
Power key off
Replace LED A’ssy.
Check P502,501 VDD voltage(pin1~4) 12V
if not OK -> Check Q501,L502,500, PANEL_VCC_EN signal
Check LVDS data signal(pin11~22, pin27~28)
If not OK -> Replace IC100(Replace Main B/D)
if not OK -> Check Q501,L502,500, PANEL_VCC_EN signal
Check LVDS data signal(pin11~22, pin27~28)
If not OK -> Replace IC100(Replace Main B/D)
No problem
No problem
No problem
Check FRC B/D
1. P102 pin(9~13) EN signal
2. Pin1,2:6V, pin4:3.3V, pin6,7:12V, supply status
3. IIC check(R109,R111)
4. P103:pin1~4 VDD 12V, LVDS Data pin P104
1. P102 pin(9~13) EN signal
2. Pin1,2:6V, pin4:3.3V, pin6,7:12V, supply status
3. IIC check(R109,R111)
4. P103:pin1~4 VDD 12V, LVDS Data pin P104
LVDS Data pin
No problem
Lamp On status
Lamp On
status NG
status NG
Check inverter lamp
On/Of status.
Check Panel Error DET signal.
(P1000:pin17 or IC802:pin12)
Check LVDS Cable
1. Main B/D to FRC
2. FRC to T-CON
1. Main B/D to FRC
2. FRC to T-CON
Replace the LVDS Cable.
NG
NG
Recheck PSU(+5V, +12V, +16V)
-> If not OK then replace PSU
-> If not OK then replace PSU
Replace PSU
Check the PWM signal
(P1000, pin 22, 21)
Replace the Main B/D.
NG
Re App S/W download.
If not OK then replace IC100.
Replace the FRC B/D
No problem
Check LED A’ssy.
Replace PSU B/D or Main B/D.
Is the inverter OK?
(INV_CTL
signal:P1000:pin20)
(INV_CTL
signal:P1000:pin20)
Re MICOM S/W download
-> If not OK then replace
IC802
-> If not OK then replace
IC802
No problem
No
problem
NG
NG
NG
2. Main Board
2-1. In case of No Raster
2-1. In case of No Raster
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Check Tuner
1. VDD Check -> TU300 pin22:1.8V
1. VDD Check -> TU300 pin22:1.8V
pin21: 3.3V
pin4:5V
pin4:5V
2. IIC check -> pin1-,11
Check ATV signal
1. Video signal
-> TU Main Signal : R336
-> Tuner V-out:C318
1. Video signal
-> TU Main Signal : R336
-> Tuner V-out:C318
Replace TU300.
Check Front END IC100
1. Check C518
1. Check C518
Check DTV signal
1. TP signal -> Pin 24~34
2. IIC check -> pin 18,19
1. TP signal -> Pin 24~34
2. IIC check -> pin 18,19
Replace TU300.
NG : DTV
Check ATV sound signal
1. Sound signal
-> SIF : R317
-> SECAM-L sound:R326
1. Sound signal
-> SIF : R317
-> SECAM-L sound:R326
NG : DTV
Check sound processor
1. IC603 pin50 for SIF(RF sound)
2. IC603 pin47 for SECAM-L sound
1. IC603 pin50 for SIF(RF sound)
2. IC603 pin47 for SECAM-L sound
Check App S/W.
If App S/W OK then replace IC603.
If App S/W OK then replace IC603.
Check Digital AMP
1. VDD 16V:IC600 pin49~52, 32~35
1. VDD 16V:IC600 pin49~52, 32~35
VDD 1.8V:IC600 pin2, 13, 16
2. Mute check:IC600 pin25
No problem
No problem
No problem
No problem
Check App S/W
If App S/W OK then replace IC600.
If App S/W OK then replace IC600.
NG
NG : DTV
NG
NG
Replace Main B/D.
NG
Check App S/W.
If App S/W OK then
replace IC100.
If App S/W OK then
replace IC100.
2-2. In case of abnormal display or sound when RF mode
Replace TU300.
NG
NG
Check App S/W.
If App S/W OK then replace Main B/D.
If App S/W OK then replace Main B/D.
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Check video signal
1. Red : JK100 pin15 and C508
2. Green : JK100 pin11 and C511
3. Blue : JK100 pin7 and C514
4. CVBS : JK100 pin20 and C1909
1. Red : JK100 pin15 and C508
2. Green : JK100 pin11 and C511
3. Blue : JK100 pin7 and C514
4. CVBS : JK100 pin20 and C1909
Check AV1 Jack
1. SCART1 LINK check
->R148 or JK100 pin17
1. SCART1 LINK check
->R148 or JK100 pin17
Check Video, Audio
Check Audio signal
1. R : JK100 pin2 and C679
2. L : JK100 pin6 and C692
1. R : JK100 pin2 and C679
2. L : JK100 pin6 and C692
Audio NG
Check App S/W.
If App S/W OK then replace IC603.
If App S/W OK then replace IC603.
No problem
Check the input source of Equipment.
NG
Check App S/W.
If App S/W OK then replace IC600.
If App S/W OK then replace IC600.
Check App S/W.
If App S/W OK then replace Main B/D.
If App S/W OK then replace Main B/D.
NG
Check Digital AMP
1. VDD 16V : IC600 pin49~52, 32~35
1. VDD 16V : IC600 pin49~52, 32~35
VDD 1.8V : IC600 pin12,13,16
2. Mute check : IC600 pin25
No problem
Video NG
Replace IC100.
No problem
No problem
2-3. In case of abnormal display or sound when side AV1(SCART1) mode
Check video signal
1. CVBS : JK101 pin20 and C519
1. CVBS : JK101 pin20 and C519
Check AV2 Jack
1. SCART1 LINK check
->R149 or JK101 pin17
1. SCART1 LINK check
->R149 or JK101 pin17
Check Video, Audio
Check Audio signal
1. R : JK101 pin2 and C690
2. L : JK101 pin6 and C627
1. R : JK101 pin2 and C690
2. L : JK101 pin6 and C627
Audio NG
Check App S/W.
If App S/W OK then replace IC603.
If App S/W OK then replace IC603.
No problem
Check the input source of Equipment.
NG
Check App S/W.
If App S/W OK then replace IC600.
If App S/W OK then replace IC600.
Check App S/W.
If App S/W OK then replace Main B/D.
If App S/W OK then replace Main B/D.
NG
Check Digital AMP
1. VDD 16V : IC600 pin49~52, 32~35
1. VDD 16V : IC600 pin49~52, 32~35
VDD 1.8V : IC600 pin12,13,16
2. Mute check : IC600 pin25
No problem
Video NG
Check App S/W.
If App S/W OK then
Replace IC100.
If App S/W OK then
Replace IC100.
No problem
No problem
2-4. In case of abnormal display or sound when side AV2(SCART2) mode
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