Sylvania 6620LDG, Service Manual

Page: 30 / 74

9-1
BLOCK DIAGRAMS < LCD TV SECTION >
System Control Block Diagram
L2650BLS
FUNCTION CB
A
KEY
-IN-1
22
CLN904
KEY SWITCH
KEY
-IN-2
11
BA
CKLIGHT
-ADJ
PWRCON
KEY SWITCH
IC1202
(TV MICR
O CONTR
OLLER)
4
21
CN1201
34
KEY
-IN-1
REMO
TE
RESET
RESET
AL+3.3V(D)
37 38
X1201 27MHz
XIN
26
D
VD-REMO
TE
23
D
VD-SCLK
22
D
VD-CS
19
D
VD-SD
A
T
A
17
LED-CONT
16
DISC-IN
15
DISC-OUT
D
VD-REMO
TE
D
VD-SCLK
D
VD-CS
D
VD-SD
A
T
A
LED-CONT DISC-IN DISC-OUT
XOUT
MAIN CB
A
5
KEY
-IN-2
29 30
P-ON-H
V
OLUME
A
UDIO-MUTE
SD
A
D
VD-MUTE
SCL
INPUT
-0
INPUT
-1
S-SW
SCL SD
A
32 11 13 35 12 14 36
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
-ADJ
D
VD-MAIN-PO
WER
20
D
VD-MAIN-PO
WER
P-ON-H
V
OLUME
A
UDIO-MUTE
INPUT
-0
INPUT
-1
S-SW
SCL SD
A
SD
A
2
SCL
1
CN1209
(NO CONNECTION)
IC1205 (MEMOR
Y)
SCL
6
SD
A
5 7
WP
Q1204
3.3V<-->5V CONVER
TER
B
US-OPEN
4
NO PART MOUNTED FOR CN1209
33
B
US-OPEN
27
P-25V
-ON
PWRCON
T
O
SYSTEM
CONTR
OL/SER
V
O
BLOCK DIA
GRAM
<D
VD SECTION>
6
AFT
-IN
44
TUNERCLK
18
D
VD-MUTE
AFT
-IN
FSC
P-25V
-ON
28
VCOM
VCOM
T
O
LCD
BLOCK DIA
GRAM
IC1201,IC1211
IR SENSOR CB
A
CLN105
CN1202
REMO
TE
SENSOR
RCV102
REMO
TE
33