LG 32LG3DCH (CHASSIS:LA76B) Service Manual ▷ View online
- 17 -
9. All Source Audio
Make sure you can’t hear any audio
Check 12S Signal
DATA,CLK,L/RCLK
Check IC402 Power 1.8V,3.3V_PRO, 16V
L516,R505,R508
Replace FB
Y
N
Replace it
N
Check Connector
P1200
Y
Y
Replace connector
N
Check speaker
Y
Replace speaker
N
Maybe NTP3000A has problems. Replace it
Y
10. Digital TV Audio
Check video output
Follow procedure All source audio trouble
shooting
Y
Follow procedure digital TV video
trouble shooting
N
N
Maybe NTP3000A internal audio
DSP has problems. Replace it
11. Analog TV Audio
Check video output
Follow procedure All source audio trouble
shooting
Y
Follow procedure analog TV video
trouble shooting
N
N
Maybe NTP3000A audio block has
problems. Replace it
Check L516 voltage level 16V
Replace it
N
Y
Check I2S signal
Replace it
N
Y
- 18 -
13. Component/ RGB/ AV Audio
12. Pillow Speaker
Check video output
Y
Follow procedure external
input video trouble
shooting
N
Check Connector
JK601 (Component)
JK605 (RGB)
JK600 / JK500
(AV Rear, AV Side)
JK601 (Component)
JK605 (RGB)
JK600 / JK500
(AV Rear, AV Side)
Replace connector
N
Y
Check signal
R620,R621(Component)
R638,R639(RGB)
R613,R614(AV Rear)
R668,R667(AV Side)
Replace it
N
Y
Check Q711 power voltage level 16V
Replace it
N
Y
Maybe NTP3000A has problems
14. HDMI Audio
Check video output
Follow procedure All source audio trouble
shooting
Y
Follow procedure HDMI video
trouble shooting
N
N
Maybe NTP3000A audio block has
problems. Replace it
Check EDID NVRAM (IC800)
Power #8 & I2C Signal (#5, #6)
Replace it or redownload
Y
N
Chec k m ai n
s p ko ut p ut
Fo llo w p ro c ed ure All so urc e aud io t ro ub le
sho o t ing
Y
Fo llo w p ro c ed ure aud io t ro ub le
s ho o t i ng
N
N
Mayb e NTP3000A aud io b lo c k has
p ro b lem s. Rep lac e it
Chec k IC1204
Rep lac e i t
N
Y
Chec k SW1200
Rep lac e i t
N
Y
- 19 -
TS_CLK
TS_SYNC
TS_VALID
TS[0-7]
/TS_ERROR
PM_TS_CLK
PM_TS_SYNC
PM_TS_VALID
PM_TS[0-7]
IF_P
IF_N
HDMI_DATA
HDMI_CLK
SIDE AV
RGB AUDIO
REAR AV
RGB
COMP
HDMI
MSTAR
(IC100)
LGDT
3304
(IC400)
FPGA
(IC1000)
VCOMO
SIDE_CVBS
SIDE_L
SIDE_R
DSUB_R
DSUB_G
DSUB_B
REAR_CVBS
REAR_L
REAR_R
REAR_S-VIDEO
COMP_Y
COMP_PB
COMP_PR
COMP_R
COMP_L
DSUB_R
DSUB_L
LVDS
WAFER
TPA
6110A
(IC502)
TPA
6011A
(IC501)
NTP
3000A
(IC500)
DATA
SCLK
LRCLK
MCLK
EXT_SPK
HP_L
HP_R
DATA
CLK
MODULE
MAIN SPK
SPK OUT
H/P OUT
DIGITAL
ANALOG
VIDEO
AUDIO
TUNER
TDVF-H071P
(TU400)
Pillow SPK
BLOCK DIAGRAM
1. Main
- 20 -
+16V
+5V
+12V
IC100
MSTAR
IC900
PTC
IC500
NTP3000A
IC1000
ASIC
IC400
LGT3304
IC501
TPA6011
3.3V
2.6V
SI3865BDV
(Q706)
3.3V
1.2V
1.8V
16V
5V
5V
3.3V
TU400
TUNER
5V
SI4925BDY
(Q711)
SC1565IST-1.8
(IC707)
MP2305DS
(IC701)
SI4925BDY
(Q704)
LCD
MODULE
SI4925BDY
(Q709)
AZ1085S-3.3TR
(IC704)
SC4215ISTRT
(Q708)
AZ1085S-3.3TR
(IC711)
AZ1117H-3.3
(IC706)
AZ1117H-3.3
(IC705)
AZ1085S-ADJTR
(IC709)
AZ1085S-3.3TR
(IC703)
AZ1085S-ADJTR
(IC710)
1.25V
16V
12V
5V
12V
POWER B"D
POWER_ON/OFF
"From MSTAR"
POWER_ON/OFF
"From MSTAR"
DCDC_LT3479
(IC903)
12V MPI
DCDC_AZ34063
(IC1204)
TRANS
PILLOW SPK
2. POWER
Click on the first or last page to see other 32LG3DCH (CHASSIS:LA76B) service manuals if exist.