LG 32LH40 / 32LH41 (CHASSIS:LA92B) Service Manual ▷ View online
- 21 -
(3) HDMI
Check input connect JK500,JK501,JK502,JK503
Can you see the normal waveform?
Can you see the normal waveform?
JK500,JK501,JK502,JK503 may have problem. Replace this Jack.
After checking the Power of this chip, you should decide to replace this or not.
After checking the Power of this chip, you should decide to replace this or not.
YES
YES
YES
NO
NO
NO
NO
After checking the Power & Select Pin & Etc of this chip,
you should decide to replace this or not.
you should decide to replace this or not.
Check DDC communication lines
(IC502)
(IC502)
Check the output of TDA9996HL(IC502)
_HDMI1,2,3 or HDMI4..
Can you see the normal waveform?
_HDMI1,2,3 or HDMI4..
Can you see the normal waveform?
Check HDCP communication lines(IC105)
YES
Check the Output (Pin Audio_MASTER_CLK ,MS_LRCK
MS_SCK,MS_LRCH) of LGE3159(IC100).
Can you see the normal waveform?
MS_SCK,MS_LRCH) of LGE3159(IC100).
Can you see the normal waveform?
Check IC600(NTP-3100L) L606/L607
YES
NO
After checking the Power & Select Pin & Etc of this chip,
you should decide to replace this or not.
you should decide to replace this or not.
NO
After checking the Power & Select Pin & Etc of this chip,
you should decide to replace this or not.
you should decide to replace this or not.
- 22 -
(4) SPEAKER
Check the output (Pin A8,B7,C7,D8) of LGE3159(IC100).
Measure waveform at R160,R161,R162,R163 because it
s more easy to check.
Can you see the normal signal?
Check the input (Pin 7,17,18,19) of NTP3100((IC600).
Can you see the normal waveform?
YES
NO
NO
This board has big problem because Main chip(BCM3553) have some troubles.
After checking thoroughly all path once again,
You should decide to replace BCM3553 or not.
After checking audio signal line, you should decide to replace item or not.
YES
NO
After checking the Power & I2C & Reset of this chip,
you should decide to replace this or not.
NO
YES
After checking audio signal line, you should decide to replace item or not.
Check the connector & Speaker
Check the Output (Pin
Audio_MASTER_CLK
,MS_LRCK
MS_SCK,MS_LRCH) of LGE3159(IC100).
Can you see the normal waveform?
Check IC600(NTP-3100L) L606/L607
YES
- 23 -
(5) SPDIF
Check the output (Pin E9) of LGE3159(IC100).
Measure waveform at R159 because it
s more easy to check.
Can you see the normal signal?
Check the input of JK601.
Can you see the normal waveform?
YES
NO
NO
This board has big problem because Main chip(LGE3159) have some troubles.
After checking thoroughly all path once again,
You should decide to replace LGE3159 or not.
After checking audio signal line, you should decide to replace item or not.
YES
After checking the Jack, you should decide to replace item or not.
- 24 -
BLOCK DIAGRAM
1. Over view
D-sub RGB
HDMI 1
Side A
V
CV
BS
, L
/R
DDR2 (5
12Mb
it)
Qimonda
/ Hy
nix
NAND Flash
(256Mb)
Digita
l A
udio
(Optic
)
Digita
l AMP
NT
P3100L
RS-232C (Ctrl./SVC)
I2S
EEPROM
512Kb
RGB/
H/V
Half-NIM Tuner
DD
R_Data[
0:
15]
, D
Q
S,
DM …
Ad
dr.[ ]
, ctrl. data
MAX3
232
Saturn5
Saturn5
(ATSC US)
(ATSC US)
MSD
3158
MPEG2
L
inux
Scal
er
He
adphone
D
a
ta [0 …
7
]
IF
+/-
SIF
TU_CVBS
R
e
set / IF
_AGC
…
SDA
/SCL_
5V
JT
A
G
C
L
K,T
D
I,T
D
O
,M
S,
R
S
T
HDMI4
Ad
dr[0…1], C
S
…
Au
d
io L/R
A
u
dio L/R (for
RGB)
HDMI 2
SP
DI
F
RX
/T
X
R
X
/TX
RE
A
R
RE
A
R
J
A
CK
P
A
CK
J
A
CK
P
A
CK
SIDE
SIDE
J
A
CK
P
A
CK
J
A
CK
P
A
CK
SCL
, SDA
_3
.3
V
T
R
B
u
ffer
VS
B
D
e
m
od.
X-t
al
Res
et
S
w
itch
Reset IC
12MH
z
T
S
In[0…
7]
TS_
cl
k, SOP, Va
l
EEPR
OM
Data[1
6:31]
AV
Component 1
Y
Pb
Pr, L/R
CV
BS
, Y/
C,
L
/R
Component 2
Y
Pb
Pr, L/R
Digital A
udio
(Coaxial)
USB2.0
SCL
, SDA
_3
.3
V
B
lu
e
tooth
Do
ngl
e
(Option)
DP
/D
M
DP
/D
M
O.C. Protector
+5V
+5V
LCD Module
(FHD, 1
2
0Hz)
FRC IC
(MST
7323)
DDR2
Qimonda/Hy
nix
FRC Block
FRC Block
LV
D
S
Option
HDMI 3
HDMI S/W
L
RCK
LR
CH
Mas
ter CLK
LCD Module
(FHD, 60
Hz)
DDR2 (5
12Mb
it)
Qimonda
/ Hy
nix
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