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What is the function of ic A3100

Total system is dead we replace output transistor and mosfeet but ic A3100 is not available in our market so we want data or substitution ic thank you

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  • dany sony Jan 23, 2012

    Did you found the part?I have the same problem.THx

  • dany sony Jan 23, 2012

    Did you found the solution or the part?I have the same problem.THX

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1 Answer

My sony 21 kv21da55 is not working it is totally dead i pulled out the system ic how was that?


Hi
Please do not dessolder anything before a thorough test. You should first check the main fuse. If it is blackened the MOSFET switchinhg transistor is probably bad and need to be replaced. The test should then go on thorugh the output line voltage in search of shorted components.
Only when the fuse is clean but open (interrupted) you can replace it and plug in the tv set and test.
Be careful and follow safety instructions on dealing with high voltage section of tv set. High voltage is letal.

I hope this will help you,

Sully

Sep 22, 2013 | Sony FD Trinitron WEGA KV-21CL10 21" TV

1 Answer

One side dead


hi zm_16dec,

Right chanel fully dead , output transistor burnedout ,

Without knowing the make and model of your amplifier

all i can advise is to replace the unknown part number of

the transistor.


Look for the working left channel output transistors and

replace the bad transistors in "pair". These may include

other components but check on it as well.


Check the speaker system, especially where that channel

is connected.Inspect speaker wires or cable up to the speaker

itself.


Amplifier wont blow without reason.It could be from the wirings,

speaker or volume settings of the unit.

Thanks for choosing Fixya for assistance!

Dec 24, 2012 | Audio Players & Recorders

2 Answers

Hitachi 32ld8700 ua no sound


Make sure you are not set to SAP mode...use mono or stereo.

Feb 03, 2012 | Hitachi 32LD8700 32 in. LCD Television

1 Answer

Toshiba model#57H94 dead set push power switch nothing want start up dead main ac fuse check good.Sam's Tv Service any help will be appreciate. Thanks


Check hori output and small blue high voltage capacitor 2k that feeds hori output transistor.
If these componets are OK then replace Both of the STK ICs they are big black ICs and will have PN# on them.example STK392-110.
Mats Electronics has ICs 1-800-628-1118
Encompass Parts Distribution has Free Service Manual for this Model# 57H94 you can print it out online.Go to their website.

Jun 05, 2011 | Toshiba 57H94 57" Rear Projection HDTV

1 Answer

Dead set ; fuse , ic regulator , horizontal output transistor , r2m diode replaced already. Still dead set.


Hi,
You need to confirm where is the trouble before replacing any parts.
Test the B+ on the H-out transistor.
No-check the B+ on 160v electrolytic cap.
If No B+ here then the trouble is in the regulator section before the chopper if it has.
Let me know the reading from your ohmmeter.
Thanks for using Fixya.
JDVillanueva

Feb 03, 2011 | Televison & Video

1 Answer

My tv model 60P8341A philips television screen is red and dull in color what do i need to do?


Hello
If your TV screen looks more red its red video output section is in trouble. Some philips circuts uses transistors while others uses ICs in that section. Philips magnavox model have both types. We here in India, have transistorised video output stages in Philips Magnavox sets. Whatever the ciruit type may be, the fault and its remedy is same.
Check whether your set has transistors or ICs used. If transistors are used, check the collector voltage at red video output transistor. If ICs are used, some sets uses a single IC for Red, Green and Blue output stages. Some of them have three ICs on board as Red,Green and blue output stages.
The video output stages are integrated on the base card of your TV. That is, a small square or rectangular board, pluged into the neck of the picture tube. You just find out the red,green and blue output transistors, or ics whichever may be used. It is ver easy to understand the video output transistors. They may be a little larger than other transistors.
An easy way is to locate the Red,Green and blue cathodes of the picture tube base board points. Check the voltage of the three of them They must be almost equal to each other, provided a little, that is, 2 or 3VDC difference is allowable and will be. In your case, the voltage at the red cathode may be , not may be, must be low. As cathode voltage lowers, emmision of that cathode will rise, and poise that colour is in excess. If the Red Cathode voltage in your TV is found low, say difference betwwen other two cathodes is 50v or so, repace the red output transistor or the Ic if used at that stage. If a single Ic is used in your TV as R_G_B outputs, replce the same. If three Ics are there, replace the red output control Ic. ok
If you have any more problems, inform fixya. They will send me alerts.
Thank you

Oct 20, 2010 | Philips Magnavox 27MS343S 27" TV

1 Answer

B1560 is not available in the market.


Don't know this particular transistor but most of the B#### transistors were manufactured by Bendix Corporations Semiconductor Division at South Street, Holmdel, New Jersey 07733. I think most if not all were Germanium PNP high power transistors in TO3 cases. It's just possible that some surplus dealer or electronics buff around Holmdel may have one in the junk box. If not look for a replacement with capability of handling the specified channel power output at the supply rail voltage. Gain is probably not too critical.

Oct 04, 2009 | Denon AVR-1506 Receiver

1 Answer

Power On + red LED turns on + but final relay (click) don't come so no sound


Your audio output transistors are shorted and your unit is staying in "protect " mode to protect your speakers from 40 to 60 volts that is being sent at them from the shorted outputs. If you can use a meter you won't need the schematic MOST likely because the outputs are USUALLY the only parts that short out. The output transistors( or chip ) are mounted to the large, finned heatsink. The #'s on the transistors start with "2SA-" and "2SC-" followed by numbers. There are two output transistors per channel. If your unit uses an IC for audio output then the # on the IC will be "STK-" followed by numbers. These parts are available from tritronicsinc.com. Good Luck!

barneyluc

Oct 17, 2008 | Denon PMA-2000R 2-Channel Amplifier

1 Answer

Dead set!


First, locate the horizontal output transistor. This is found very close to, or next to, the horizontal output transformer (also known as the flyback). The flyback should be on an aluminum heat sink, or on the side of the metal chassis. Disconnect or unsolder two of the three legs of the transistor. Measure it with your meter, or plug in the set with the light bulb attached across the fuse.
If the transistor is shorted, or the light bulb doesn’t glow bright anymore, replace the transistor and plug back in. If the light bulb glows bright again, you must replace both the flyback and horizontal output transistor simultaneously. In some cases this will fix the set, but sometimes there are multiple problems with a set.
Go to where the flyback is, and start measuring the diodes and capacitors on the flyback itself. If you don't find any shorts there, it could be a shorted vertical output IC, a shorted sound IC, a shorted disc capacitor in the Hi Voltage/sweep circuit, or in rare cases, a shorted capacitor or tuner.Feel free to ask and post whatever the result of your troubleshooting..


Hope this may help;

Regards,
VOTIT

DON'T FORGET TO RATE

Jul 30, 2008 | Televison & Video

1 Answer

Monitor is totally dead


Through my past experience I mwould remove the solder point at the input power B+ line to primary winding FBT. If the HOT has shorted there will be no power.Straight to the point if you know where the HOT is , you can desolder the middle pin or collector of the HOT transistor. If you desolder the pin which result the power led light turn up. That indicates either FBT or HOT has shorted

Apr 19, 2008 | LG Studioworks 45 14" CRT Monitor

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