20
6.
Block Diagrams, Test Point Overview, and Waveforms
Block Diagram
Video
S
ign
a
l
A
u
dio
S
ign
a
l
D
a
t
a S
ign
a
l
UART
Wiring
D-
S
UB VGA
(CN6)
D-
S
UB
VGA O
u
tp
u
t
(CN9)
BNC (YP
b
Pr)
(CN7)
Phone J
a
ck
A
u
dio1 IN
RCA
A
u
dio2 IN
RCA
A
u
dio
3
IN
RCA A
u
dio
R
S
-2
3
2
IN
R
S
-2
3
2
OUT
VIDEO BUFFER
T
S
H
3
40
(U24/U27/U2
8
)
A
u
dio
DAC
AUDIO AMP
YDA1
38
(CN16)
S
CALER
5251A
(U29A)
AUDIO
S
W
NJW1411M
HDMI1
(CN5)
O
u
tp
u
t Termin
a
l
L C D P A N E L(LK460D
3
LZ1
8
)
S
-VIDEO
RCA (CVB
S
)
(J
a
ck1)
BNC (CVB
S
)
BNC (CVB
S
)
VIDEO
DECODER
UPD64015
Video B
u
ffer
MM1671
(U42)
S
DRAM
I
S
42
S
16100
DDR
S
DRAM
M1
3S
12
83
24A
MCU
W79E659
(U
3
4)
RTC
PCF
8
56
3
R
S
-2
3
2
S
P
3
24
3
EEPROM
24LC
3
2A
FLA
S
H
EN29F040
(U
33
)
S
YNC
S
EPARATOR
LM1
88
1(U4
3
)
DUAL 1-4 MUX
PI5C
3
25
3
HDMI2
(CN4)
HDMI
S
W
TMD
S3
41
S
A
(U11)
GPIO
EXPANDER
A
u
dio
B
u
ffer
T
S
4
8
2ID
Inp
u
t
Port
O
u
tp
u
t
PCBA
I2C Device
(J1)
C
S
YNC
S
ELECTOR
PI5V
33
1(U44)
Power
Mod
u
le
C
N
1
C
N
2
S
pe
a
ker
Bo
a
rd
KEYPAD
Bo
a
rd
IR/LED
Bo
a
rd
BLOCK DIAGRAM
I_17540_017.ep
s
3
1010
8