Philips VE8 Service Manual page 123

EN 124 9. Q529.1A LA
9.2 Main Supply
9.2.1 32" Sets
The 32" sets in this chassis can come with two different buy-in
Delta supply units:
• DPS-230B
• DPS-182CP A.
When defective, a new panel must be ordered and the
defective panel must be sent for repair, unless the main fuse of
the panel is broken. Always replace a defective fuse with one
with the correct specifications! This part is available in the
regular market.
Refer to the Spare Parts list for the order number of the supply
unit.
DPS-230B
The supply unit delivers the following voltages to the chassis:
• 60/24V and 12V (connector CN2, LCD panel, 3 pins)
I I
• 24V (connector CN4, Ambilight, 6 pins).
A
• 12 V (connector CN5, Bolt-on, 4 pins)
B
• +12 V (connector CN5a, Bolt-on provisional, 4 pins)
B
• 3.3 V , 12 V , +12 V
SB SSB
SSB, 11 pins)
• +12 V (connector CN7, SSB, 8 pins).
SSB
DC output protections - Short Circuit Protection
The 3.3 V standby power circuit has short circuit protection with
an auto restart function and an over voltage protection which
operates within a range of 120 to 140% of the nominal value.
In case a short-circuit situation occurs at the 12 V, 12 V
24 V output the over voltage protection operates within a
A
range of 120 to 140% of the nominal value.
In case a short-circuit situation occurs at one of the + 12 V
- 12 V outputs, the over voltage protection intervenes at a
A
maximum value of 19 V.
In case a short-circuit situation occurs at the 24 V
supply unit will auto-recover when the fault condition is
1316
Lamp interfacing
1319
Ac-input +
Mainsfilter
AC-IN
1308
Circuit Descriptions, Abbreviation List, and IC Data Sheets
and -12 V (connector CN6,
audio audio
output, the
INV
CCFL-
inverter
PFC
Low Stby
Figure 9-3 High level Power Architecture IPB42
removed. It operates within a range of 120 to 140% of the
nominal value.
DPS-182CP A
The supply unit delivers the following voltages to the chassis:
• 24 V
14 and 12 pins)
• 24 V
• 12 V
• +12 V
• 3.3 V
SSB, 11 pins)
• +12 V (connector CN7, SSB, 8 pins).
DC output protections - Short Circuit Protection
The 3.3 V standby power circuit has short circuit protection with
an auto restart function and an over voltage protection which
operates within a range of 120 to 140% of the nominal value.
In case a short-circuit situation occurs at the 12 V, 12 V
24 V output the over voltage protection operates within a
A
range of 120 to 140% of the nominal value.
In case a short-circuit situation occurs at one of the + 12 V
- 12 V
A
maximum value of 19 V.
In case a short-circuit situation occurs at the 24 V
supply unit will auto-recover when the fault condition is
removed. It operates within a range of 120 to 140% of the
nominal value.
9.2.2 37" and 42" Sets
or
B
The 37" and 42" sets in this chassis come with a IPB supply
unit. The difference between both is the adjustment of the lamp
current in the high-voltage inverter: 120 mA for 37" and 135 mA
or
A
for 42" panels, adjustable with potentiometer 3224 (diagram
A2).
Refer to the Spare Parts list for the order number of the supply
unit.
24V-power
1M90
Platform
1M09
- Power
12V
Power
1M95
1M99
power
Control
(connector CN2 and CN3, LCD panel,
inv
(connector CN4, Ambilight, 6 pins).
A
(connector CN5, Bolt-on, 4 pins)
B
(connector CN5a, Bolt-on provisional, 4 pins)
B
, 12 V, +12 V and -12 V
SB audio
outputs, the over voltage protection intervenes at a
Ambient
Light
Bolt-on
SSB
I_17660_121.eps
(connector CN6,
audio
or
B
or
A
output, the
INV
140308