PDP-LX5080D
47
5
6
7
8
5
6
7
8
C
D
F
A
B
E
5.2.2 POWER SUPPLY UNIT
Flowchart of Failure Analysis for The POWER SUPPLY Unit
Is the cable connected firmly to
the P4 connector?
Is the cable to the P4 connector
broken?
Check the voltage at the DIGITAL Assy and
PO
W
ER SUPPLY Unit.
Check the voltage at the DIGITAL Assy and
PO
W
ER SUPPLY Unit.
Check the resistance between C102 (lead
nearest LF101) and the D105 anode,
using a tester.
Properly connect the cable between
the P4 and D23 connectors.
N
o
Replace the defective cable (J104).
Yes
Yes
Yes
Is the cable connected firmly to
the P9 connector?
Properly connect the cable between
the P9 and M2 connectors.
N
o
Yes
Is the cable to the P9 connector
broken?
Replace the defective cable (J106).
Is the fuse (F101) blown?
Replace the PO
W
ER SUPPLY
Unit.
Replace the PO
W
ER SUPPLY
Unit.
Replace the PO
W
ER SUPPLY
Unit.
Replace the PO
W
ER SUPPLY
Unit.
Yes
N
o
N
o
Is one of the limiting resistors
(R101/R102) blown?
Yes
N
o
The PO
W
ER SUPPLY Unit is
normal.
The PO
W
ER SUPPLY Unit is
normal.
STB 3.3
V
power is not output.
N
o
Is the
V
ADR voltage within the
specified values?
Is the
V
SUS voltage within the
specified range?
Is there a fluctuation in the
V
ADR voltage?
Is there a fluctuation in the
V
SUS voltage?
The ripple must be within 5
V
.
The ripple must be within 10
V
.
The specified voltage values are between
57 and 63
V
.
The specified voltage values are between
200 and 210
V
(
V
SU: 125/35
°
C).
N
o
Yes
Yes
N
o
N
o
Yes
Yes
The cells of the panel do not
light normally.
N
o
The PO
W
ER SUPPLY Unit is
normal.
The power is not on, even though
the RELAY port is active.
Is the relay (RY102) on?
• Check the relay operation at the terminal
(Pin 11 of P4). (
V
oltage: 3.3
V
)
• Check the relay sound (click).
N
o
Yes
Is the PFC voltage normal?
• Check the voltage between the J
W
135
(PFC OUT) and J
W
112 (G
N
D of primary
side) terminal.
• The voltage must be around 390
V
.
Caution:
High voltage!
Replace the PO
W
ER SUPPLY
Unit.
Replace the PO
W
ER SUPPLY
Unit.
Replace the PO
W
ER SUPPLY
Unit.
Replace the PO
W
ER SUPPLY
Unit.
N
o
Yes
Failure analysis for the
PO
W
ER SUPPLY Unit => PS1
Failure analysis for the
PO
W
ER SUPPLY Unit => PS2
Failure analysis for the
PO
W
ER SUPPLY Unit => PS3
Summary of Contents for KURO PDP-LX508D
Page 19: ...PDP LX5080D 19 5 6 7 8 5 6 7 8 C D F A B E ...
Page 20: ...PDP LX5080D 20 1 2 3 4 1 2 3 4 C D F A B E 4 BLOCK DIAGRAM 4 1 OVERALL WIRING DIAGRAM 1 2 ...
Page 22: ...PDP LX5080D 22 1 2 3 4 1 2 3 4 C D F A B E 4 2 OVERALL WIRING DIAGRAM 2 2 ...
Page 23: ...PDP LX5080D 23 5 6 7 8 5 6 7 8 C D F A B E ...
Page 159: ...PDP LX5080D 159 5 6 7 8 5 6 7 8 C D F A B E ...
Page 170: ...PDP LX5080D 170 1 2 3 4 1 2 3 4 C D F A B E 10 6 PANEL CHASSIS SECTION ...
