FUNAI LT5-M32BB, Service Manual

Page: 23 / 76

7-1
System Control Block Diagram
A73F2BLS
BLOCK DIAGRAMS
CN102
KEY
-IN1
KEY
-IN1
34
KEY SWITCH KEY SWITCH
IC3803 (SUB MICR
O CONTR
OLLER)
IC3501 (MAIN MICR
O CONTR
OLLER)
TU4102
(TUNER UNIT)
CN3501
3
RESET
XOUT
XIN
RESET
IC3802
AL +3.3V
X3801
Q103
Q104
4MHz OSC
DIGIT
AL MAIN CB
A UNIT
PO
WER SUPPL
Y CB
A
J
A
CK CB
A
IR SENSOR CB
A
FUNCTION CB
A
PO
WER SUPPL
Y CB
A
CLN51B
REMO
TE
SENSOR
RCV891
AL+3.3V
D102 PO
WER
ST
ANDBY
D101
LED-G
88
CLN51A
REMO
TE
55
LED-R
99
CN302
CN4502
REMO
TE
21
3
CN4503
SD
A
71
7
CN303
SCL
81
6
CN701
CN4105
Q3802
SD
A
22
18
CN7001
SCL
23
17
LED1
REMO
TE
LED1
13
11
5
4
CN552
CL552B
7
2
2
7
3
6
PR
O
TECT1
4
PR
O
TECT3
2
BA
CKLIGHT
-PWM
7
BA
CKLIGHT
-ON
PR
O
TECT1
PR
O
TECT3
BA
CKLIGHT
-PWM
BA
CKLIGHT
-ON
6
CN3802
KEY
-IN2
43
JUNCTION CB
A
REMO
TE
9
17
LAST
-OUT
16
4 6
9
10
A6 B6
SCL SD
A
G20
DTV
-ON-H
H23
DTV
-RESET
H22
DTV
-B
US-CONT
H21
DTV
-TXD
H20
DTV
-RXD
J23
DTV
-W
AKEUP
SCL
SD
A
L22
B
US-OPEN
XOUT XIN
X3502
27MHz OSC
AC10 AB10
IC802 (T
ONE CONTR
OL)
SCL SD
A
14 13
IC7701 (VIDEO/A
UDIO SELECT
OR)
SCL SD
A
45 44
IC3801
(MEMOR
Y)
SCL
SD
A
6 5
WP
7
IC3103
(HDMI INTERF
A
CE)
SCL
SD
A
28 27
RESET
102
B
UFFER
AMP-MUTE
AMP-STBY
V
-COM
P-ON-H
T
O
A
UDIO-2
BLOCK DIA
GRAM
TO INVER
TER
BLOCK DIA
GRAM
(CL552A)
AMP-MUTE
A16 K23
BA
CKLIGHT
-PWM
AMP-STBY
J20
A11
BA
CKLIGHT
-ON
J21
E3 D1
PR
O
TECT3
LAST
-OUT
KEY
-IN1
KEY
-IN2
F3
A12
L23
B16
T
O
DIGIT
AL
SIGNAL PR
OCESS
BLOCK DIA
GRAM
T
O
PO
WER SUPPL
Y
BLOCK DIA
GRAM
PR
O
TECT1
18
P-ON-H
10
V
-COM
P-ON-H
22
2
Q3801
B
UFFER
Q3804
B
UFFER
ST
A
TUS-OUT
19
ST
A
TUS-OUT
C11
POFF-OUT
20
RESET
1
POFF-OUT
D11
RESET
D20
Q3803
B
UFFER
Q3807
B
UFFER
DTV
-W
AKEUP
24
DTV
-RESET
23
DTV
-RXD
28
DTV
-TXD
27
TU-SCL
37
TU-SD
A
3
6
SWITCHING
Q4184
SWITCHING
Q4183
DTV
-ON-H
T
O
PO
WER SUPPL
Y
BLOCK DIA
GRAM
T
O
D
VB-T MODULE
CBA UNIT