Philips 19HFL3233D/10 Service Manual page 27

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: OFF, High: ON)
2 2 BRIGHT_ADJ, Inverter bright PWM
control (Max.: 0 V, Min.: 3.3 V)
3 3, 4 +12 V Supply
4 5, 6, 7 Ground
5 8, 9 +18 V Supply
6 10 STANDBY, Standby
control (High: Normal, Low: Stand by)
7 11, 12 STB_PWR5V, +5VSB Supply
DC POWER INPUT
CN701 CN701
1
2
3
4
5
6
7
8
9
10
11
12
13
Figure 7-4 System power
7.4.2 Tuner power
TJ4220GDP provides the tuner power of approximately 5 V.
+5V_SW
R766 R766
10K 1/16W 5% 10K 1/16W 5% U706 U706
TJ4220GDP-ADJ TJ4220GDP-ADJ
E-PAD
1
NC
2
EN ADJ/SENSE
3
VIN VOUT
4
NC
C752 C752
10uF 16V 10uF 16V C772 C772
10uF 16V 10uF 16V
OFF ON
Figure 7-5 Tuner power
7.4.3 DDR3 1.5V
This AZ117D provides the 1.5 V power supply for the DDR
memory (U404).
INVERTER_ON_OFF
BRIGHT_ADJ
PWR_12V
PWR_18V
R702 R702
100R 1/16W 5% 100R 1/16W 5%
STB_PWR5V
C701 C701
NC/10uF NC/10uF
19120_208_110518.eps
9
8
GND
7
6
R759 R759
5
NC
15K 1% 15K 1%
R760 R760
47K +-1% 1/16W 47K +-1% 1/16W
R761 R761
12K 1% 1/16W 12K 1% 1/16W
19120_210_110518.eps
Circuit Descriptions
DV33
C725 C725
10uF 16V 10uF 16V
7.4.4 AV12 (U704)
This AZ117D provides the 1.2 V power supply for the DVBT/C
demodulator (U1011)
DV33
FB751 FB751
220R/2000mA 220R/2000mA
1
1UF16V 1UF16V
PWR_ON
110524
7.4.5 Nand flash Memory (U4051)
The set uses a 128 MB NAND flash for software code
+5V_TUNER
R4244 R4244
4K7 1/16W 5% 4K7 1/16W 5%
DV33
DV33
R4247 R4247
4K7 1/16W 5% 4K7 1/16W 5%
110518
Figure 7-8 Nand flash Memory (U4051)
TPM8.2E LA
FB705 FB705
220R/2000mA 220R/2000mA U703 U703
AZ1117D AZ1117D
1 2 3 2
VIN VOUT
C729 C729
22UF 16V 22UF 16V
Figure 7-6 DDR3 1.5V
U704 U704
AZ1117D AZ1117D
2 3 2
VIN VOUT
C757 C757
120R 1% 1/10W 120R 1% 1/10W
C756 C756
+ +
NC/22uF 16V NC/22uF 16V 1R 1/10W 5% 1R 1/10W 5%
Figure 7-7 AV12 (U704)
DV33 DV33 U4051 U4051
K9F1G08U0C-PIB0 K9F1G08U0C-PIB0
1 48
NC1 NC29
2 47
NC2 NC28
R4243 R4243
3 46
NC3 NC27
4K7 1/16W 5% 4K7 1/16W 5%
4 45
NC4 NC26
5 44
NC5 I/O7
6 43
NC6 I/O6
PARB#
7 42
RY/BY1 I/O5
POOE#
8 41
RE I/O4
POCE1#
9 40
CE1 NC25
10 39
NC7 NC24
11 38
NC8 NC23
12 37
VCC1 VCC2
13 36
VSS1 VSS2
14 35
NC9 NC22
15 34
NC10 NC21
PACLE
16 33
CLE NC20
PAALE
17 32
ALE I/O3
POWE#
18 31
WE I/O2
Flash_WP#
19 30
WP I/O1
20 29
NC11 I/O0
21 28
NC12 NC19
22 27
NC13 NC18
23 26
NC14 NC17
24 25
NC15 NC16
7. EN 27
DV15_DDR
+ + C730 C730
R712 R712 220UF 16V 220UF 16V
120R 1% 1/10W 120R 1% 1/10W
R726 R726
27ohm 1/10W +/-1% 27ohm 1/10W +/-1%
19120_212_110518.eps
110518
AV12
+ + C759 C759
22uF 16V 22uF 16V
R756 R756
R757 R757
19120_213_110518.eps
110518
PDD7 DV33
PDD6
PDD5
PDD4
C4262 C4262
220N 10V 220N 10V
PDD3
PDD2
PDD1
PDD0
19120_214_110519.eps
110519
2011-Jun-01