Question about RCA F36673ET 36" TV

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Dead fuse was blown, power resistor 2.7 ohm 15 watt was open, replaced both and the fuse blows again. The power supply seams strange to me. The 110 volts is rectified then it goes to a transformer? That seams backwards?

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SOURCE: resistor

http://www.eserviceinfo.com/downloadsm/25749/RCA_24F512T.html

down load the schematic diagram &get the value.

hope this will help you.

Posted on Oct 12, 2007

jeramie_curt
  • 36 Answers

SOURCE: RCA L42WD22

3 watts metal oxide resistor. Don't have to worry about volts. Just use a 3 watt

Posted on Feb 28, 2011

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Loud crack when turning unit on, blows main fuse no lights come on.. bottom of power supply black and signs of burn...


DO NOT REPLACE THE FUSE !!! You will do more damage.

I just repaired one of these. A small ceramic surface mounted cap very near where the +/- 85 volt connectors plug onto the board blew up.

This left a sputtered mess on the insulating material at the right rear corner of the power supply.

The net parts list of parts I had to replace:

1. Main IGBT transistors on heat sinks. You have to remove the heat sinks to get at the mounting screws. 1MBK50D or equivalent. I used DigKey part APT28GA60BD15

2. One 1N4148 surface mount diode that is for gate drive speedup. D24 and D25. (don't remember which one was shorted)

3. All four driver transistors for the gate of the IGBT's. @ each 2SA1020 (PNP) and 2SC2655 (NPN). These are tall TO92-like transistors and I believe that at least one of these I had to get from Mouser.

4. Transistor T9, suface mount BC856B (PNP)

5. Replaced all four surface mount caps, one had exploded.
C50, C51,C54,C56. Replace with 0.01mfd/200 Volt 1206 style surface mount caps Digikey 478-1511-6

6.Replaced ceramic wire wound 10 Watt stand up resistors that were blown open. Replaced with 20 ohm design change. These slowly charge the main input filter caps and when supply is stable, a relay shorts them out. If you have replaced the fuse, you LIKELY blew them out. Original value was 10 ohms on some units. This was a Mouser part. 280-PRM10-20-RC

7. The 2153 switching reg chip IC1. This chip shorts. It is made by International Rectifier and I believe the full number is something like IRF2153. I had these in stock and not sure of which source I had procured them from... It was from one or the other.

Lots of destruction and one really needs a desoldering station to work this. Removal of the blown IGBT's is especially tough. All solder must be removed from the transistor leads AND the thermistor on one of the heat sinks. Once you have verified the leads are loose, one has to rock the heat sinks to get the tabs free. The tabs are NOT soldered! Be careful when restoring to get the thermistor leads started in their holes.

Note: ALL these repair parts were procured from DigiKey.com and Mouser.com. Neither of these places had all, I had to order from both. Mouser had the ceramic resistors.

When restarting this, leave outputs disconnected until it is running again. USE a series 75 watt light bulb in the 120 volt input. ONLY work on the unit using an isolation transformer as a large portion of this is connected right to the power line.

There is a small 15 volt switching supply that comes on first that runs the relay to short out the inrush limiting resistors. With the 2153 shorted as usual, this auxilary supply can't reach voltage enough to turn on the relay. The power for this is supplied through the ceramic resistors.

May 08, 2010 | Behringer Pmp3000 16 Channel Audio Mixer

2 Answers

Blown fuse everytime it powers on


yes right there is a short circuit in power supply if you are non technical then replace the power supply if you are technical then open the power supply and check the 4diodes of bridge if faulty replace it again check transistor attatched to heat sink if faulty repalce it

Feb 28, 2010 | Pyramid (PS36KX) 600-Watt Power Supply

1 Answer

Is there a way that you can tell if your resistors are blown


Hi


Thanks for using FixYa. By looking at the resistors you can see if they are burned or brown color. Only the resistors with small value blow(getting open) like 1 ohm 1/4 watt or 1 ohm 1/2 watt or 10 ohm 1/2 , 1/4 watt some times the bigger one like 100 ohms, the bigger than 100 ohm just changing the value and make problem.


Please do accept the solution if the issue is resolved or else revert for further assistance.


Thanks
Rylee

Jan 22, 2010 | Televison & Video

1 Answer

Just installed new steam shower, it produces steam for about 5 minutes and then blows the fuse


Based from your comments, a new steam shower that blows the fuse in five minutes. You could have installed a new steam shower that is much bigger than what you previously have.
1. For a 5000 watts steam shower at 220 volts
power must have a fuse rating of 40 amps, supply
wires of at least No. 6 AWG Type THW ; and at
110 volts a fuse rating of 80Amps, supply wires
of at least No. 2 AWG type THW.
2. For a 4000 watts at 220 volts, Fuse: 30 amps,
Supply wire: No. 10 AWG type THW. At 110volts
60 amps, Supply wires : No. 4 AWG Type THW
3. For a 3000 watts at 220 volts, Fuse: 20 amps
Supply wire: No. 10 AWG type THW; At 110volts
Fuse: 40 amps, Supply wire: No. 6 AWG THW
4. For a 2000 watts at 220 volts, Fuse: 15 amps
Supply wire: No. 10 AWG THW and at 110 volts
Fuse: 30 amps, Supply wire: No, 8 AWG THW

Nov 27, 2009 | Hammering

1 Answer

Samsung pcl5414r power resistors and pico fuses??


Hi again and welcome back to FixYa,

Appreciate the direct "Ask Me'.

Based on your original post, only the STK ICs were replaced. Presumably 392-040, the surrounding resistors and pico fuses could very well have been affected as well. Depending on the board revision (pls confirm location numbering on the actual board), the resistors could be:
RZ104 -RZ106 - 270 Ohm 1/2watt
RZ133-RZ135 - 27K Ohm 1/16 watt
RZ136 & RZ138 - 3.3K Ohm 1/8 watt
RZ146 and RZ147 - 3.9 Ohm 2 watt
RZ148 and RZ149 - 150 Ohm 2 watt
while the pico fuses would look like the image below.
90b151e.jpg
Good luck and Thank you for using FixYa.

Dec 26, 2008 | Samsung PCL5415RB 54" Rear Projection...

1 Answer

AKAI PDP4225M HAS RED LIGHT BUT WILL NOT POWER ON.


this is because R001 is not 5.6 ohms, it's 560K ohms

Nov 10, 2008 | Akai PDP4225M 42 in. Plasma Television

1 Answer

AKAI PDP4225M HAS RED LIGHT BUT WILL NOT POWER ON.


hi isolate ur power unit out replece ur resisitor & every other burnt items then check the schottky diodes in the secondary side &the electrolytic capacitors if bulgge or leak. if all this are ok , power then use voltmeter to test ur output voltages if ok , unplug your inverter  & power

Nov 10, 2008 | Akai LCT3201AD 32 in. LCD Television

1 Answer

Toshiba tw40f80, replaced both convergence ic's, power light still blinks


Solder yoke plug and vertical IC connections.....try again.
Let me know.....T.

BTW....Tosh recommends STK-392-110's replace with -110T's
Toshiba OEM.....then there is no question about resistor value
change......

Aug 03, 2008 | Toshiba TW40F80 40" Rear Projection...

1 Answer

Peavey 400BH


Thanks for the update. I'll need to look through my records for similar problems. Stay tuned...
Dan

Jun 13, 2008 | Audio Players & Recorders

1 Answer

Fuse blows when it gets plugged in


No it doesn't sound like a resistor, it sounds like you have a short in power supply, you can look for bad Diodes in bridge rectifier,or solder bridge, or transistor short, start from beginning to end. It is definately a short and most of the time resistors open and this will not cause a blow just a dead set.

Sep 21, 2007 | Emerson EWF2703 27" TV

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