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6. Schematic
6.1 Main Board
715L1203-1
MST8111B SCHEMATIC
VCPU
VCC12V
VCC5V
VCPU
VCC12V
VCC3.3
VCC2.5
VAA1
VAA2
VAA3
VAA4
VCC5V
CON402(PITCH 2.00)
CN201
GND
ON_OFF
1
2
GND
DIM
3
4
VCC12V
VCC12V
5
6
GND
GND
7
8
VCC5V
VCC5V
9
10
GND
GND
11
12
VCC5V
R203
1K
1/16W
Brightness
R205 4.7K
1/16W
1
Q202
4
AdjBACKLITE
PMBS3904
VCC5V
R206
10K
1/16W
R207 4.7K
1/16W
1
Q204
6
onPanel_5V/3.3V
C207
0.1uF
B1
RIN
GNDR
TXD
GIN
RXD
GNDG
DDC_CLK
SOG
DDC_DAT
BIN
GNDB
ST_DET1
HSY NC
ST_DET2
VSY NC
R+
R-
G+
G-
B+
B-
CLK+
CLK-
3.INPUT
B3
ST_DET2
ST_DET1
DDC_CLK
CSZ
DDC_DAT
SCL
RXD
SDA
TXD
HWRESET
INT
AD0
VCC5V
AD1
AD2
VCC12V
AD3
VCPU
Volume
onPANEL_5V/3.3V
onBACKLITE
6.MCU
B4
onBACKLITE
onPanel_5V/3.3V
VCPU
VCC12V
VCC3.3
VCC2.5
AdjBACKLITE
VAA1
VLCD
VAA2
VAA3
VAA4
VCC5V
VLCD
2.POWER
R201
4.7K
D201 SS14
FB201
600 OHM
C202
C204
C203
+
+
0.1uF
220uF/25V
220uF/25V
R204
10K
1/16W
C206
+
1uF/0805
VLCD
VLCD
5
VCC5V
VCC3.3
R208
10K
1/16W
R209
R210
Q203
AO3401
0
1/16W
NC
PMBS3904
C208
R211
+
10uF/16V
10K
1/16W
B2
RIN
GNDR
GIN
GNDG
SOG
BIN
GNDB
HSY NC
VSY NC
R+
R-
G+
G-
B+
B-
CLK+
CLK-
CSZ
SCL
SDA
HWRESET
INT
AD0
AD1
AD2
AD3
Volume
AdjBACKLITE
4.SCALER
VCC5V
VCC12V
R202
VCC12V
6
10K
1/16W
1/16W
C201
R212 4.7K
1/16W
VCC5V+
1
VCC5V
0.1uF
Q201
VCC5V
3,6
PMBS3904
VCPU
VCPU
6
C205
0.1uF
19
EN7220 Service Manual
VCC2.5
VCC2.5
VCC3.3
VAA1
VAA2
VAA3
VAA4
PA[0..9]
PB[0..9]
VCC5V+
SOT-223
D202
U201
GS1D
RT9164-25CG
3
C210
0.1uF
onBACKLITE 6
VCC5V+
TO-252
U202
3
2
VIN
VOUT
1
ADJ
C214
C215
0.1uF
AIC1084-33CE
47uF/16V
VCC3.3
VAA1
VAA2
VAA3
VAA4
B5
PA[0..9]
PA[0..9]
VLCD
PB[0..9]
PB[0..9]
VLCD
5.PANEL INTERFACE
VCC2.5
2
VCC2.5
VI
VO
C211
C212
+
47uF/16V
0.1uF
VCC3.3
VCC3.3
4
VAA1
VAA1
4
C216
VAA2
+
0.1uF
VAA2
4
VAA3
VAA3
4
VAA4
VAA4
4
4
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