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EN 24
7.
TPM8.3L LA
7.4
Circuit Description
7.4.1
System power
The main board power is received at connector CN701 from
power board, to receive the power and signals from the PSU.
See
Table 7-1
for the correct pining, The shown test points in
Figure
7-4.
Table 7-1 Connector CN701 overview
Item
Pin
Description
1
1
INVERTER_ON_OFF, Inverter board
control (Low: ON, High: OFF)
2
2
BRIGHT_ADJ, Inverter bright PWM
control (Max.: 0 V, Min.: 3V3)
3
3, 4
+12 V Supply
4
5, 6, 7
Ground
5
8, 9
+24 V Supply
6
10
STANDBY, Standby
control (High: Normal, Low: Stand by)
7
11, 12
STB_PWR5V, +5VSB Supply
8
13
POWER OK
CN701
1
BL_CTRL
2
BRI_ADJ
3
4
5
+
6
NC/C701
7
330UF 35V
8
9
10
11
+
12
C703
13
330UF 35V
CONN
R701
10K 1/16W 5%
+
C705
470UF 10V
Figure 7-4 System power
7.4.2
Nand flash Memory (U403)
The set uses a 256 MB NAND flash for software code
DVDD3V3
R4117
4K7 1/16W 5%
R4115
4K7 1/16W 5%
PARB#
POOE#
POCE1#
10
11
DVDD3V3
12
13
14
C4108
15
100N 16V
PACLE
16
PAALE
17
POWE#
18
FLASH_WP#
19
20
21
22
23
24
Figure 7-5 Nand flash Memory (U403)
7.4.3
NVM (U4103)
The system NVM is a 128 KB IC. It contains all system settings.
2011-Sep-30
Circuit Descriptions
+12V
NC/FB701
1
2
120R/6000mA
NC/C702
100N 50V
+24V
FB702
1
2
120R/6000mA
C704
100N 50V
R712
8.2K 1/10W
ZD701
NC/BZX84C3V6
R738
NC/0R05 1/16W
5VSB
FB703
1
2
120R/6000mA
C706
10uF 10V
PWR_OK
R750
0R05 1/10W
19190_208_110905.eps
U403
1
48
NC1
NC28
2
47
NC2
NC27
3
46
NC3
NC26
4
45
NC4
NC25
5
44
PDD7
NC5
I/O7
6
43
PDD6
NC6
I/O6
7
42
PDD5
RY /BY 1
I/O5
8
41
PDD4
RE
I/O4
9
40
DVDD3V3
CE1
NC24
39
NC7
NC23
38
NC8
PRE
DVDD3V3
37
VCC1
VCC2
36
VSS1
VSS2
35
NC9
NC22
34
NC10
NC21
33
C4109
CLE
NC20
32
PDD3
100N 16V
ALE
I/O3
31
PDD2
WE
I/O2
30
PDD1
WP
I/O1
29
PDD0
NC11
I/O0
28
NC12
NC19
27
NC13
NC18
26
NC14
NC17
25
NC15
NC16
HY 27US08561A-TPCB
19190_211_110905.eps
C4104
220N16V
1
2
3
4
7.4.4
Reset (U4101)
When the input voltage for the MT5301B main processor drops
below 2.93 V, a system reset will be enforced by U4101.
ORESET#
PSU_STBY
H : ON
L : Standby
OPWRSB
110905
C4110
10uF 10V
110905
DVDD3V3
R4103
U4103
8
E0
VCC
7
E1
WC
6
E2
SCL
5
VSS
SDA
CAT24C128Y I
R4106
2.2K 1/16W
I2C address at A0
Q4101
PMBS3904
10K 1/16W 5%
Figure 7-6 NVM (U4103)
3V3SB
R4139
0R05 1/16W
1
GND
VCC
R4140
NC/5K1 1/16W 5%
R4108
0R05 1/16W
U4101
MAX809STRG
C4123
R4110
NC/10P 50V
NC/100K 1/16W
Figure 7-7 Reset (U4101)
R4104
R4105
OSCL0
OSDA0
MEMORY _WP#
R4109
H: Write Enable
L: Write Protect
19190_212_110905.eps
110905
3V3SB
5VSB
R4111
NC/820R 1/10W 1%
3
C4107
R4112
100N 16V
NC/1K8 1/10W 1%
19190_213_110905.eps
110905
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