LG 32CL20-UA (CHASSIS:LA92A) Service Manual ▷ View online
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10. Analog TV Audio
Check RF Cable.
OK
Check SIF buffer signal.
Check SIF Signal line.
No
OK
Check Tuner 5V Power
TU1001 4pin
Check IC1002.
Check IC1005(19”, 22”).
No
Bad Tuner
Replace Tuner.
No
OK
Follow procedure All source audio
trouble shooting guide.
Replace Mstar(IC100)
or Main board.
No
9. Digital TV Audio
Check Tuner 5V Power
TU1001 4pin.
Check IC1002.
Check IC1005(19”, 22”)
No
OK
Check IF_P/N Signal.
Bad Tuner. Replace Tuner
No
OK
Check Demodulator Input Clock(X1005).
Replace X1005.
No
OK
Check IC400(LGDT) Output
-AR1070, AR1071
Replace IC400.
No
OK
Check Output Signal
P600 1, 2, 3, 4 pin
Replace NTP(Audio AMP)
IC500
No
OK
Check speaker resistance
and connector damage.
Replace speaker.
No
OK
Check Connector & P600
Replace connector
if found to be damaged.
No
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BLOCK DIAGRAM
D-sub RGB
HDMI 1
Side AV
CVBS, L/R
DDR2 (512Mbit)
Qimonda /
Hynix
NAND Flash
(256Mb)
Digital Audio (Optic)
Digital AMP
NTP3100L
RS-232C (Ctrl./SVC)
I2S
EEPROM
512Kb
RGB/H/V
Half-NIM Tuner
DDR_Data[0:15], DQS, DM...
Addr.[ ], ctrl. data
MAX3232
Saturn5
(ATSC
US)
MPEG2
Linux
Scaler
Data [0...7]
IF +/-
SIF
TU_CVBS
Reset / IF_AGC...
SDA/SCL_5V
JTAG
CLK,TDI,TDO,MS,RST
Addr[0...1], CS...
Audio L/R
Audio L/R (for RGB)
HDMI 2
SPDIF
RX/TX
RX/TX
JACK PACK
at REAR
JACK PACK
at SIDE
SCL, SDA_3.3V
TR Buffer
VSB
Demod
.
LGDT3305
X-tal
Reset Switch
Reset IC
12MHz
TS In[0...7
]
TS_clk, SOP, Val
EEPROM
Data[16:31]
DDR2 (512Mbit)
Qimonda /
Hynix
AV
Component 1
Y Pb Pr, L/R
CVBS, Y/C, L/R
SCL, SDA_3.3V
Bluetooth
Dongle
(Option)
DP/DM
LCD Module
(FHD,HD)
LVDS
EEPROM
EEPROM
HDMI 3
EEPROM
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122
120
510
500
121
300
200
400
521
530
800
801
805
802
804
803
821
540
900
910
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
A2
LV1
A10
C
2009
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