51
PDP-5020FD
5
6
7
8
5
6
7
8
A
B
C
D
E
F
[2] POWER SUPPLY UNIT
Flowchart of Failure Analysis for The POWER SUPPLY Unit
Is the cable connected firmly to
the P7 connector?
Is the cable to the P7 connector
broken?
Check the voltage at the MAIN Assy and
POWER SUPPLY Unit.
Check the resistance between D112 cathode
and JW194 (jumper),
using a tester.
Properly connect the cable between
the P7 and M2 connectors.
No
Replace the defective cable (J109).
Yes
Yes
Is the fuse (F102) blown?
Replace the POWER SUPPLY
Unit.
Replace the POWER SUPPLY
Unit.
Replace the POWER SUPPLY
Unit.
Replace the POWER SUPPLY
Unit.
Yes
No
Is one of the limiting resistors
(R126) blown?
Yes
No
The POWER SUPPLY Unit is
normal.
The POWER SUPPLY Unit is
normal.
STB 3.4 V power is not output.
No
Is the VADR voltage within the
specified values?
Is the VSUS voltage within the
specified range?
Is there a fluctuation in the
VADR voltage?
Is there a fluctuation in the
VSUS voltage?
The ripple must be within 5 V.
The ripple must be within 10 V.
The specified voltage values are between
72 and 78 V.
The specified voltage values are between
200 and 210 V (VSU: 125/35
°
C).
No
Yes
Yes
No
No
Yes
Yes
The cells of the panel do not
light normally.
No
The POWER 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 JW281
(jumper). (Voltage: 5 V)
• Check the relay sound (click).
No
Yes
Is the PFC voltage normal?
• Check the voltage between the JW154
(jumper) (-) and JW139 (jumper) (+).
• The voltage must be around 400 V.
(340V or less are defective.)
Caution:
High voltage!
Replace the POWER SUPPLY
Unit.
Replace the POWER SUPPLY
Unit.
Replace the POWER SUPPLY
Unit.
Replace the POWER SUPPLY
Unit.
No
Yes
Failure analysis for the
POWER SUPPLY Unit => PS1
Failure analysis for the
POWER SUPPLY Unit => PS2
Failure analysis for the
POWER SUPPLY Unit => PS3
Summary of Contents for ARP3476
Page 10: ...10 PDP 5020FD 1 2 3 4 A B C D E F 1 2 3 4 2 2 SPECIFICATIONS ...
Page 11: ...11 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F ...
Page 12: ...12 PDP 5020FD 1 2 3 4 A B C D E F 1 2 3 4 2 3 PANEL FACILITIES Front Section ...
Page 13: ...13 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F Rear Section ...
Page 14: ...14 PDP 5020FD 1 2 3 4 A B C D E F 1 2 3 4 Remote Control Unit ...
Page 15: ...15 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F ...
Page 21: ...21 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F ...
Page 22: ...22 PDP 5020FD 1 2 3 4 A B C D E F 1 2 3 4 4 BLOCK DIAGRAM 4 1 OVERALL WIRING DIAGRAM 1 2 ...
Page 25: ...25 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F OVERALL DIAGRAM PDP 5020FD ...
Page 31: ...31 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F ...
Page 71: ...71 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F ...
Page 192: ...192 PDP 5020FD 1 2 3 4 A B C D E F 1 2 3 4 9 6 PANEL CHASSIS SECTION ...