Philips 32PFL3606H/12 Service Manual page 35

7.4 Circuit Description
7.4.1 System power
The main board power is received at connector CN7001 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 7-11.
Table 7-1 Connector CN7001 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: 0V, Min: 3V3)
3 3, 4 +12V Supply
4 5, 6, 7 Ground
5 8, 9 +24V Supply
6 10 STANDBY, Standby
control (High: Normal, Low: Stand by)
7 11, 12 STB_PWR5V, +5VSB Supply
8 13 LED ON, LED on power board need a signal to
control it by panel turn on needed
DC POWER INPUT
CN7001 CN7001
CONN CONN
1
2
3
4
5
6
7
8
9
10
11
12
13
R7010 R7010
10KOHM +-5% 1/8W 10KOHM +-5% 1/8W
Figure 7-11 System power
7.4.2 Digital/Analog power
The DVDD3V3 and AVDD3V3 are from U7005 (G1084), it can
provide 5 A output current. R7013/FB7006 are for power
measurement. FB7006 also is for filtering.
DIGITAL/ANALOG POWER DVDD3V3/AVDD3V3 form +5V_SW
+5V_SW
FB7005 FB7005
220R/2000mA 220R/2000mA
U7005 G1084TU3UF U7005 G1084TU3UF
3
VIN VOUT
C7028 C7028
100uF 16V 100uF 16V + +
100N 16V 100N 16V
C7027 C7027
Figure 7-12 Digital/Analog power
INVERTER_ON_OFF
BRIGHT_ADJ
+12V
R7005 R7005 0R05 4A 1/4W 0R05 4A 1/4W
R7006 R7006 0R05 4A 1/4W 0R05 4A 1/4W
+24V
R7009 R7009 100OHM1/16W 100OHM1/16W
STB_PWR5V
C7007 C7007
NC/22uF 10V NC/22uF 10V
19080_215_110325.eps
DVDD3V3
FB7006 FB7006
R7013 R7013
0R05 4A 1/4W 0R05 4A 1/4W 220R/2000mA 220R/2000mA
Vout
2 1
R7020 R7020
RB 130R 1% 130R 1%
+ + 100uF 16V 100uF 16V
C7029 C7029
C7023 C7023
C7022 C7022
100N 16V 100N 16V
10uF 10V 10uF 10V
R7021 R7021
RA
220R 1% 220R 1%
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Circuit Descriptions
7.4.3 Tuner power
The tuner power is derived from +12V by U7001 (AS7805), the
power should not drop below 4.75 V for the LG tuner, but it can
be 4.9V at least.
TUNER POWER +5V_TUNER form +12V
+12V
R7233 R7233
NC/18 OHM 2W NC/18 OHM 2W
R7026 R7026
0R05 4A 1/4W 0R05 4A 1/4W
7.4.4 Peripheral
This chassis uses 128 MB NAND flash for it's software code. It
stores the main software of the TV.
NAND Flash
DVDD3V3
STANDBY
110325
7.4.5 System EEPROM
The EEPROM is 128 Mb, it includes many important data for
this TV for example NVM and, adjustment data.
SYSTEM EEPROM
SYS_EEPROM_WP
AVDD3V3
2
OSCL0
OSDA0
110401
back to
div. table
TPM6.1E LA
FB7001 FB7001 220R/2000mA 220R/2000mA
U7001 AS7805DTR-E1 U7001 AS7805DTR-E1
1 2 1
IN OUT
C7018 C7018 C7019 C7019
+ +
330NF 16V 330NF 16V 10uF 16V 10uF 16V
C7030 C7030
100uF 16V 100uF 16V
Figure 7-13 Tuner power
U4005 U4005
1
NC
2
NC
3
NC
4
DVDD3V3
NC
5
330 OHM 1/16W 330 OHM 1/16W NC
6
R4025 R4025 NC
PARB# 7
RB
POOE# 8
R4027 R4027
R
POCE1# 9
E
10
4.7K1/16W 4.7K1/16W
NC
11
NC
VDD_NAND 12
VDD
13
VSS
C4042 C4042
14
NC
1UF16V 1UF16V
15
NC
PACLE 16
CL
PAALE 17
AL
POWE# 18
W
Flash_WP# 19
WP
20
NC
21
NC
22
NC
23
NC
24
NC
NAND01GW3B2CN6E NAND01GW3B2CN6E
NAND 128MB
Figure 7-14 Peripheral
R4042 R4042
4K7 1/10W 5% 4K7 1/10W 5%
R4045 R4045
NC/0R05 1/10W NC/0R05 1/10W
2
R4102 R4102 Q4003 Q4003
10K 1/16W 5% 10K 1/16W 5% BC847C BC847C
R4013 R4013
4K7 1/16W 1% 4K7 1/16W 1%
Figure 7-15 System EEPROM
7. EN 35
+5V_TUNER
3
C7020 C7020 C7021 C7021
22uF 10V 22uF 10V
100N 16V 100N 16V
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110401
48
NC
47
NC
46
NC
45
NC
44 PDD7
I/O7
43 PDD6
I/O6
42 PDD5
I/O5
41 PDD4
I/O4
40
NC
39
NC
38
NC
37 VDD_NAND
VDD
36
VSS
35
NC
34
NC
33
NC
32 PDD3
I/O3
31 PDD2
I/O2
30 PDD1
I/O1
29 PDD0
I/O0
28
NC
27
NC
26
NC
25
NC
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110401
DVDD3V3
Pin7 WP
HI = > Disable write
LO = > Enable Write
U4008 U4008
8 1
VCC A0
7 2
WP A1
6 3
SCL A2
5 4
SDA VSS
AT24C128BN-SH-T AT24C128BN-SH-T
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110401
2011-Jun-10