Philips Cineos 32PFL9603D/10, Руководство по обслуживанию

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Circuit Descriptions, Abbreviation List, and IC Data Sheets EN 1 8 1 Q529.1E LA 9.
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
I
and 12V
I
(connector CN2, LCD panel, 3 pins)
• 24V
A
(connector CN4, Ambilight, 6 pins).
• 12 V
B
(connector CN5, Bolt-on, 4 pins)
• +12 V
B
(connector CN5a, Bolt-on provisional, 4 pins)
• 3.3 V
SB
, 12 V
SSB
, +12 V
audio
and -12 V
audio
(connector CN6,
SSB, 11 pins)
• +12 V
SSB
(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
B
or
24 V
A
output the over voltage protection operates within a
range of 120 to 140% of the nominal value.
In case a short-circuit situation occurs at one of the + 12 V
A
or
- 12 V
A
outputs, the over voltage protection intervenes at a
maximum value of 19 V.
In case a short-circuit situation occurs at the 24 V
INV
output, the
supply unit will auto-recover when the fault condition is
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
inv
(connector CN2 and CN3, LCD panel,
14 and 12 pins)
• 24 V
A
(connector CN4, Ambilight, 6 pins).
• 12 V
B
(connector CN5, Bolt-on, 4 pins)
• +12 V
B
(connector CN5a, Bolt-on provisional, 4 pins)
• 3.3 V
SB
, 12 V, +12 V
audio
and -12 V
audio
(connector CN6,
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
B
or
24 V
A
output the over voltage protection operates within a
range of 120 to 140% of the nominal value.
In case a short-circuit situation occurs at one of the + 12 V
A
or
- 12 V
A
outputs, the over voltage protection intervenes at a
maximum value of 19 V.
In case a short-circuit situation occurs at the 24 V
INV
output, the
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
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
for 42" panels, adjustable with potentiometer 3224 (diagram
A2).
Refer to the Spare Parts list for the order number of the supply
unit.
Figure 9-3 High level Power Architecture IPB42
Ac-inp u t +
M a in s filter
PFC
CCFL-
inverter
Pl a tform
- Power
L a mp interf a cing
1 3 16
1 3 19
AC-IN
1 3 0 8
24V-power
1M90
1M09
12V
Low S t b y
power
Power
Control
1M95
1M99
Bolt-on
Am b ient
Light
SS B
I_17660_121.ep s
140 3 0 8