Philips 42PFL9664H/12 Service Manual page 44

EN 44 7. Q549.6E LA
7.2 Power Architecture
Refer to figure Figure 7-3
platform.
PSU
P la tfo rm
P o w e r
3V3stby
+12V
24V** Inverter*
24 Vs
(+/-12 Vs opt)
24V
7.2.1 Power Supply Unit
All power supplies are a black box for Service. When defective,
a new board must be ordered and the defective one must be
returned, unless the main fuse of the board is broken. Always
replace a defective fuse with one with the correct
specifications! This part is available in the regular market.
Consult the Service website for the order codes of the boards.
In the TV543 Elite Core Narrow and Thin (N&T) platform, two
Power supply Units are implemented.
In this manual, no detailed information is available because of
design protection issues.
The output voltages to the chassis are:
• +3V3-STANDBY (standby-mode only)
• +12V (on-mode)
• +Vsnd (+24V) (audio power) (on-mode)
• +24V (bolt-on power) (on-mode)
• IPB: High voltage to the LCD panel.
7.2.2 Diversity
Below find an overview of the different PSUs that are used:
2009-May-29
Circuit Descriptions
for the power architecture of this
F use
12VD isp
SSB
Standby
+3V3 stby
+1V2 +1V2-ST AN D BY
BL D IM *
Lam p On *
12V
U ndervoltage Sw itches off
detect
+3V3 and
+5V
D etect 2
(12V sense)
Power-OK
Stby P
Am bilight
Bolt - on
Figure 7-3 Power Architecture TV543/92 platform
LC D
Power-on
PNX5100
Lam p On
F use
+1V2
D ual
D C /D C
Enable -3V3
+3V3
+2V5
+3V3F
+1V8
2.5V 1%
voltage ref
Boost conv .
+33V
(opt)
+1V2
+5V
D ual
D C /D C
+5V
tuner
D etect 1
Audio proc
+ C lass D
+3V3 (SSB)
V inverter 4kV*
V backlight 24 V**
Table 7-1 Supply diversity
PSU
IPB DPS-288CP A B & IPB DIV-003
IPB DPS-288CP A B & IPB Delta 2k9 N&T 47"
V display
Boost control (Opt)
BL D IM
+1V2-PNX85XX
+3V3
+2V5 +2V5 (loc.Contr.FPGA)
+1V8 +1V8-PNX85XX
+1V8 +1V8-PNX5100
+33V-TUN(analog)
AN D
+1V2-PN X 5100
+5V
+5V-T un +5V-T U N
*: present in inverterless displays
**: present in displays w ith internal inverter
18310_202_090317.eps
Model Input Voltage Range
42" High Mains (198- 265 Vac)
High Mains (198- 265 Vac)
Inverter**
Display
090317