Emerson EWL2005, Service Manual

Page: 19 / 52

7-1
BLOCK DIAGRAMS
System Control Block Diagram
L3202BLS
FUNCTION CB
A
IC333
(TV MICR
O CONTR
OLLER)
3
21
KEY
-IN-1
22
CN104
CLN104
KEY SWITCH
11
KEY
-IN-1
REMO
TE
RESET
RESET
Q151
P-ON+3.3V(D)
42 43
X161 27MHz
XIN
XOUT
MAIN CB
A
LCD MAIN CB
A UNIT
4
KEY
-IN-2
11
KEY
-IN-2
22 18 17
BA
CKLIGHT
-SW
19
5
BA
CKLIGHT
-ADJ
21
3
P-ON-H
16
8
V
OLUME
15
9
A
UDIO-MUTE
13
11
INPUT
-0
12
12
INPUT
-1
11
13
S-SW
71
7
SCL
61
8
SD
A
51
9
BA
CKLIGHT
-SW
BA
CKLIGHT
-ADJ
P-ON-H
V
OLUME
A
UDIO-MUTE
SD
A
SCL
INPUT
-0
INPUT
-1
S-SW
SCL SD
A
20 35 31 40 19 32 41
T
O
PO
WER SUPPL
Y
BLOCK DIA
GRAM
T
O
IF/VIDEO
BLOCK DIA
GRAM
T
O
A
UDIO
BLOCK DIA
GRAM
BA
CKLIGHT
-SW
BA
CKLIGHT
-ADJ
P-ON-H
V
OLUME
A
UDIO-MUTE
INPUT
-0
INPUT
-1
S-SW
SCL SD
A
T
O
LCD BA
CKLIGHT
BLOCK DIA
GRAM
CN102B
CN102A
SD
A
2
SCL
1 CN112
(NO CONNECTION)
IC171 (MEMOR
Y)
SCL
6
SD
A
5 7
WP
Q131
3.3V<-->5V CONVER
TER
B
US-OPEN
4
NO PART MOUNTED FOR CN112
23
B
US-OPEN
P-ON-H2(NU)
14
10
16
P-ON-H2
12
P-25V
-ON
P-25V
-ON
T
O
PO
WER
SUPPL
Y
BLOCK DIA
GRAM
KEY SWITCH
IR SENSOR CB
A
CLN105
REMO
TE
SENSOR
RCV102
AL +5V
D102 PO
WER
Q102
P-ON-H
44
CN105
REMO
TE
33
INVER
TER CB
A
BA
CKLIGHT
-ADJ
99
CN411
CLN411
BA
CKLIGHT
-SW
88
P-ON-H
11
11
P-ON-H
AFT
-IN
10
14
5
AFT
-IN
80
TUNERCLK
Q301
B
UFFER
AFT
-IN
B
US-OPEN
51
9
CN103B
CN103A
CN113
(NO CONNECTION)
SD
A
2
SCL
1 B
US-OPEN
4
CN113 IS USED FOR ADJUSTMENT AT FACTORY
P-ON-H
FSC
12
3
FSC