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Transistor in position Q309 is burned out

Transistor position Q309 burned out, need a replacement part number

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MY RADIO BLEW UP ONE OF ITS TRANSISTOR B..something please help me to know the other digits for thew repair

Transistors have their type written on them in very small print.
Look at the transistor that is faulty and read off the number printed on it.

Dec 19, 2013 | Philips AZ2555 CD Boombox

1 Answer

I have a pioneer sa9800 with problems it has sound but on right channel a lot of craclin noise is heard even when it is on phono a bad leakage is heard as well any help pls?


Aug 07, 2011 | Lasonic TRC-931 Cassette Boombox

1 Answer

Need a new anntena, how do I get one?

You can always get replacement antennas from the local hardware store or simply order replacements from or to do this all you have to do is get the product model number and part number and search on ebay and
Hope this solution has been helpful?

Mar 05, 2011 | Aiwa CA-DW235 Boombox

1 Answer

Need ac power cord

You can always get replacement cables from the local hardware store or simply order replacement cables from or to do this all you have to do is get the product model number and part number and search on ebay and
Hope this solution has been helpful?

Mar 05, 2011 | Durabrand CD Player with Cassette...

2 Answers

Pioneer SA 9800 Ampliffier Output transistor going off frequently

I assume these are the complimentary pair that drive the speakers. On one of the speaker. You know I think you have a short in the speaker that it drives. Speaker can fuction even if there was a problem with it. I think what happened is when the original transistors shorted out it overloaded the speaker, but not to a point where it is burnt. There is nothing that can overload a power transistor except the speakers, I design a lot of amplifiers, the base input can overload it if you put dc in there, but that would make a the sound all distorted, I assume the sound seem fine. Solution is try connecting a known good speaker and I bet it wont burn out anymore. Even if the speaker look fine don't trust it.

Jun 30, 2009 | Lasonic TRC-931 Cassette Boombox

1 Answer

I have a jukebox that stopped playing radio, cd and cassette? any recommendation on where or how to fix it?

This is a power supply problem. First check for a blown fuse where the AC cord comes in to the circuit board. Try to put another fuse if its blown with same rating. If it blow again then there is a semicondutor that has failed. Semiconductors fail by conducting current on both direction therefore creating a short. Example of a semiconductors are: diodes, transistors, regulator packages, chips etc. Transsistor would have three pins. Diodes are usually cylindrical shape with a color band on one end, and has pin on both ends. Chips, and are also semiconductors, but rarely goes out. Thats because most chips run on very small current. The rule of thumb is the bigger a semiconductor device, the more current it operates on, and therefore more likely to naturally fail. So if you were to test one of these components. You would use a multimeter, turn the dial to select "diode" and do a go/no-go test. Meaning you would see if there is contituity on only one direction. Now in that mode, the meter actually display "voltage drop" semiconductors usually have 0.4 voltage drop across one direction, give or take a few fraction of a volt. The other direction there is almost no voltage drop. Thats because it is not suppose to conduct the other way. If you suspect a shorted out diode, or transistor in the power supply, take it out of the circuit, using a soldering iron, then measure it one more time to confirm. If it was bad, note the number on it,and hopefully it is still readable, and replace with the same kind, or one the has the same characteristic.

Jun 29, 2009 | RCA Spirit Of St. Louis Radio/Cassette/CD...

2 Answers

My sharp Stereo is stuck in '' protect'' mode

Protect mode is not something that a reset will fix. Basically it indicates that there is a problem with the final output stage of the amplifier. Normally this indicates that the output transistors are defective. In most boomboxes, the amplifier is a single IC. If you can post the model number, I can provide you with the required part and cost.


Mar 25, 2009 | Sharp Boomboxes

1 Answer

Sony boombox model cfs-b11 transformer

Your tape requires 9 volt transformer as shown in below schematic..


Part number is 1-450-016-11

Mar 05, 2009 | Sony Boomboxes

3 Answers

Error code U01

The part# for Q308 is KRA102MTA I have the service manual if you want it

Sep 09, 2007 | Panasonic RX-D12 Cassette/CD Boombox

2 Answers

Replacement Antenna

antennas are not so strict part of an audio equipment, you may replace with one available, with the same size, eventhough not the same length.

May 20, 2007 | RCA RCD152 Boombox

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