LG 29FU1RL/RG, Service Manual

Page: 16 / 20

BLOCK DIAGRAM
- 16 -
SOUND AMP
LA42102N
(
(
(
(
FBT
20
0
V
28
V
AB
L
HEATER B+
Collector
14V
B+
(115V)
SMPS TRANS EER4942
40V
AC
INPUT
(100~240V
)
15
11
2
10
9 8 5
4
-14V 1
IC824
ST-6V REG
16
Rear_AV(1)
( PHONE/ SCART)
Rear_AV(1)
( PHONE/ SCART)
IC12
EE
PROM
24C1
6
SIF
SIF
3
14V
Rear_AV(2)
( PHONE/SCART/DVD)
Rear_AV(2)
( PHONE/SCART/DVD)
Menu
OK
VOL-
VOL+
PR-
PR+
SD
A
SC
L
5V
33V
12 13
VE
R. AMP
LA78141
IF
VIF
VIF
Saw Filter
3
H OUT TR
2S
C6090
Tuner
STR-
W6556
STR-
W6556
RGB Amp
TDA6107AJF
RGB Amp
TDA6107AJF
Sound Vcc 6.5V
IC823
3.3V REG
IC826
5V REG
V Heat er
HV
Vscreen
2
0
2
K
J
1
0
2
K
J
RK,GK,
B
K
24
.5
76Mhz
21V
5V
R
,G
,B
ou
t
IK
SI
F I
N
VIF IN
42
41
46
45
20
21
H-
FB
HO
UT
49
EW
34
RF
/M
NT
V
ou
t
31
32
33
AV
1 V
,L
,R
28
29
30
AV
2 V
,L
,R
23
24
RF
/M
NT
L
,Rou
t
12
13
14
15
R,G,B F
B
Or
Y,
P
B
,P
R
S
P
K
L,
R
out
48
47 VB
VA
6
7
8
9
R,G,B,
IK
60
X-TA
L IN
59
X-
TA
L O
U
T
63
AB
N
65
DE
G
66
EYE
1
IR
76
77
SD
A
SCL
2
10
AB
L
5
75
3.3V
56
DECD
IG
(2.
5V
)
55
35
18
5V
36
8V
1
68
1.8V
67
KEY
25
26
64
PW
R
71
S-
M
U
TE
72
SA
W
S/W
6
5
7
2
4
SP
K R
SP
K L
S-MUTE
1.
8V(RF ST)
2.
5V
8V(A
V
ST
Opt)
5V
ST-3.3
V
EW IC
KIA4558
HV &
H Comp
Circuit
HV
TO DY
ST-
3
.3
V
ST-
5V
2
20V
RF ST OPT
H DRIVE
TRANS
38V
31
V
RF ST OPT
Comp In
Scartin
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Only for training and service purposes. LGE Internal Use Only
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