Panasonic TH-50PC77U 50 in. Plasma TV Logo

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Bruce Lewis
Bruce Lewis Posted on Sep 25, 2011
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Is there a fuse in the TH-50PC77U that can be changed? No power light and open resistance across power input

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electroman

  • 1039 Answers
  • Posted on Sep 08, 2011

SOURCE: I have a Th-50PC77U that

& blinks is sc or,sd or ,su board or all 3. Disconnect the ac cord. remove the back cover. on the left are 2 thin boards with flat cables that connect to the panel. these 2 boards are the SD and SU boards. They are connected to a board to the right. This the SC board or Y sustain board. Disconnect the 2 wie plug that connects this SC board to the power board in the middle. Examine the sqauare ics on the SC and SU boards on the rt side. Look for a pit or burn mark on one of the ics. If you see one then this board is bad. Disconnect this board from the SC board remove connectors on the rt and also remove the all the screws on this board. It should now be hanging free only by the flat cables on the rt. reconnect the 2 wire cable from the SC board to the power board. Plug in the set and power on. If set turns on the that board needs replaced. You will see 1/2 of picture. If still won,t turn on then disconnect the ac cord and the 2 wire conn from power board to SC board. disconnect the other board on the left letting it hang free. re connect SC to power board,plug ac cord in and turn on. If set now will turn on then Replace that board. If stiil won/t turn replace the SC board.

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Anonymous

  • 2098 Answers
  • Posted on Sep 25, 2011

SOURCE: Panasonic TH-50PC77U will not turn on. Are there

Hi bhlewis116,

Yes, the power supply board(where the power cord's directly connected) has fuses. It is a multicolored or white ceramic fuse.

jdvillanueva_130.jpg White ceramic fuse


jdvillanueva_131.jpg multicolored ceramic fuse



To check it on the power supply board, you have to take off the rear cover of your TV. Let the unit unplug from the outlet for 1 hour to drain the voltages from the board before you do the repair.

See the location of the fuses on the picture below.

jdvillanueva_132.jpg


Check its continuity using the multimeter. If you've found an open one, replace it with same current(ampere) rating that is printed on the fuse itself or on the board.

Jdvillanueva

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How to fix codes p195 on 2004 lincoln ls 3.0
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Nov 29, 2012 • Cars & Trucks
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Hi.. please help me.. my minolta dialta 183 is not working.. there's a code CO5 in the screen.. please help me to fix it.. thanks
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Step 1
Check:
Fusing Heater Lamp (H1) turns
ON.

Step 2
Check:
Fusing Heater Lamp (H1) is open-circuited.
<Check Procedure>
Check the resistance across both
ends of the Fusing Heater Lamp
(H1).
The Fusing Heater Lamp is open-circuited
if the resistance is infinity.

Result: YES
Action: Change Fusing Heater Lamp (H1).

Step 3
Check: Thermoswitch 1 (TS1) is operational.
<Check Procedure>
Check the resistance across both
ends of the Thermoswitch 1 (TS1).
The Thermoswitch 1 is open-circuited
if the resistance is infinity.

Result: NO
Action: Change Thermoswitch 1 (TS1).

Step 4
Check: Fusing Unit Interlock Switch (S2) is
operational.
<Check Procedure>
Check continuity across terminals
when the Fusing Unit Interlock
Switch (S2) is turned ON.
• Across S2-1A and S2-1B
• Across S2-2A and S2-2B

Result: NO
Action: Change Fusing Unit Interlock
Switch (S2).

Result : YES
Action: Change DC Power Supply (PU1).

Step 5
Check: Thermistor (TH1) is open-circuited.
<Check Procedure>
Check the resistance across CN15-2
and CN15-3 on the Fusing Unit side
with CN15 disconnected.
The Thermistor is open-circuited if
the resistance is infinity.

Result: YES
Action: Change Thermistor (TH1).

Step 6
Check: The following voltages are supplied
from the Master Board (copier: PWBA).
<Check Procedure>
Check voltage across a Master Board
(copier: PWB-A) pin and GND when
the Power Switch is turned ON.
• Voltage across PJ10A-7 and GND
DC24 V when Fusing Heater Lamp
(H1) is OFF
DC0 V when Fusing Heater Lamp
(H1) is ON
• Voltage across PJ10A-10 and
GND
DC24 V when Fusing Heater Lamp
(H1) is OFF
DC0 V when Fusing Heater Lamp
(H1) is ON

Result: NO
Action: Change Master Board (copier:
PWB-A).
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Oct 05, 2011 • Konica Minolta DiALTA Di200 Copier
1helpful
1answer

Minolta dialta 183 help me... theres a code in the screen CO5 .. and automatically turn off.
C0500: Warm-up failure

Step 1
Check:
Fusing Heater Lamp (H1) turns
ON.

Step 2
Check:
Fusing Heater Lamp (H1) is open-circuited.
<Check Procedure>
Check the resistance across both
ends of the Fusing Heater Lamp
(H1).
The Fusing Heater Lamp is open-circuited
if the resistance is infinity.

Result: YES
Action: Change Fusing Heater Lamp (H1).

Step 3
Check: Thermoswitch 1 (TS1) is operational.
<Check Procedure>
Check the resistance across both
ends of the Thermoswitch 1 (TS1).
The Thermoswitch 1 is open-circuited
if the resistance is infinity.

Result: NO
Action: Change Thermoswitch 1 (TS1).

Step 4
Check: Fusing Unit Interlock Switch (S2) is
operational.
<Check Procedure>
Check continuity across terminals
when the Fusing Unit Interlock
Switch (S2) is turned ON.
• Across S2-1A and S2-1B
• Across S2-2A and S2-2B

Result: NO
Action: Change Fusing Unit Interlock
Switch (S2).

Result : YES
Action: Change DC Power Supply (PU1).

Step 5
Check: Thermistor (TH1) is open-circuited.
<Check Procedure>
Check the resistance across CN15-2
and CN15-3 on the Fusing Unit side
with CN15 disconnected.
The Thermistor is open-circuited if
the resistance is infinity.

Result: YES
Action: Change Thermistor (TH1).

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Check: The following voltages are supplied
from the Master Board (copier: PWBA).
<Check Procedure>
Check voltage across a Master Board
(copier: PWB-A) pin and GND when
the Power Switch is turned ON.
• Voltage across PJ10A-7 and GND
DC24 V when Fusing Heater Lamp
(H1) is OFF
DC0 V when Fusing Heater Lamp
(H1) is ON
• Voltage across PJ10A-10 and
GND
DC24 V when Fusing Heater Lamp
(H1) is OFF
DC0 V when Fusing Heater Lamp
(H1) is ON

Result: NO
Action: Change Master Board (copier:
PWB-A).
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P0193 fuel rail pressure circuit high input
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May 21, 2010 • Panasonic TH-50PC77U 50 in. Plasma TV
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The television just won't turn on but my outlet plugs are working fine.
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You should be able to bring the fuse into radioshack for a replacement.
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Mar 26, 2010 • Panasonic TH-50PC77U 50 in. Plasma TV
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Panasonic th-50pc77u red light blinks 8 times in cycle
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How do you chck the fuse?
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If you do not have access to a multimeter, you can still make a continuity tester as follows:
Take a AA cell and a small torch bulb, connect one point of the bulb with the cell. Attach a piece of wire each to the unconnected sides of the bulb and the cell. Now to check continuity connect the open ends of wires across the fuse. If the fuse is good the bulb will light but not otherwise.
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