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EN 18
7.
VEM1.1E_LA
Power Supply
7.2
Power Supply Unit
7.2.1
Before checking other parts first check whether fuse on the
PSU is not broken. Always replace a defective fuse with one
with the correct specifications! This part is available in the
regular market.
Consult the Philips Service web portal for the order codes of the
boards.
Power Management
7.3
The on-board DC/DC converters receive the following voltages
from the PSU (depending on set execution):
•
+3.3 VSB, for standby mode.
•
+5 VSB, for standby mode.
•
+12 VSB, for standby mode.
•
+3.3 V, for on mode.
•
+5 V, for on mode.
Circuit Description
7.4
System power
7.4.1
The main board power is received at connector CN5 from
power board, to receive the power and signals from the PSU.
See
Figure 7-2
for the correct pining.
20
19
3V3_VCC
18
17
3V3_STBY_1
16
15
12V_STBY
14
13
12
11
12V_STBY
10
9
8
7
6
5
4
3
2
1
power_pin1
CN5
Figure 7-2 Connector CN5 overview
System power
7.4.2
The main board power is received at connector CN5 from
power board, to receive the power and signals from the PSU.
See
Figure 7-2
for the correct pining.
2013-Oct-18
Circuit Descriptions
power cable
3V3_VCC
24V_VCC_AU (N/A 22" models)
12V_STBY
power_pin11
5V_STBY
DIMMING
BACKLIGHT_ON/OFF
S211
STBY_ON/OFF
power_pin3
nc
S212
STBY_ON/OFF_NOT
S115
24V_VCC_AU
19560_205_130909.eps
130909
The output voltages to the chassis are:
•
+5V / +3V3 / 12 V- STANDBY
•
+5 V / +12V (on-mode)
USB Interface
7.2.2
The SOC has one input port for USB,
MEDIATEK
USB Host
Interface
Figure 7-3 USB Interface
back to
div. table
19560_208_090913.eps
090913
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