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I've an old Ampex subwoofer AX578MS.it muted when I inserted USB cable.and scanner radio mounted spoilt.I replaced three transistors.but no sound.yet the power indicator light is working

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6ya6ya
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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: Steering mounted radio control button light replacement

The radio buttons come as a set, they are very easy to replace but being a dealer only part a bit pricey.

Posted on Nov 29, 2008

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  • 9 Answers

SOURCE: No sound from the System, Power light is on the

make sure you plug the subwoofer into the green jack port on your pc.

Posted on Oct 16, 2009

jhinsincity
  • 616 Answers

SOURCE: No sound from the subwoofer

Fuse is probably blown

Posted on Apr 13, 2010

  • 1 Answer

SOURCE: Mustek Scanexpress A3 USB scanner stopped working

my scanmagic 1200ub is recognized by my pc but i keep getting a message saying"cannot locate component.could it be that particular port?

Posted on Dec 15, 2010

dunnbiker
  • 8546 Answers

SOURCE: Yamaha Rx-V367 Subwoofer not working,

Have you looked at the manual?

The NEW thing doesn't work.

Does the subwoofer work for setup? That would certify the hardware and speaker definitions are ok.

The PC has the responsibility for defining and sending out something between headphone and full-blown 7.1 though the HDMI. Check your PC sound controls and the "Information on HDMI" section of the manual.

For the radio mode, probably the only analog stereo source you have, read up on the STRAIGHT decoding mode and Sound Field programs.

Posted on May 08, 2011

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1 Answer

Turn tv on, tv screen will come on blue then turn off


Hi
I think your TV set has a short circuit in the RGB output circuit and shuts down or mute to protect the CRT. This circuit is located in small board attached to the CRt neck. If you are keen on electronics or you have a fried that is, you can mesure the voltages in the collectors of the three big transistor mounted on that board. The voltages of these transistor collectors are slightly diferent and the faulty one has low or even no voltage. It should be replaced.

Sully

Sep 28, 2013 | Televison & Video

1 Answer

I need transistors ( Imt4401 and Imt4403) for High Freq.Amp (SRM450) - where can i get them?


Could be 2N4401/2N4403, PN2222A/MPS2907A, NPN/PNP, NTE replacements are NPN/123AP and PNP/159, At radio Shack, Mouser Electronics, Newark Electronics, D'Albani Corporation and a number of places as this is a very common small signal transistors, hope this helps.

Dec 06, 2011 | Mackie SRM-450 System

1 Answer

We just got a new cable box and now the Picture works but no sound. The volume is not muted on the tv or cable box. We've tried connecting the cable box three different ways and still get the same...


Does say a dvd player give sound when connected to the same input? If you have determined that the source is good and the speakers are turned on in the menu then I would replace the main board.

Sep 08, 2011 | Sony KDE-50XS955 50 in. Plasma HDTV

1 Answer

I have no sound


consigning no sound on your TV



You might need to do some troubleshooting tips first before calling a repair man to replace the sound IC inside the TV.

Hello,

First check that any muting control is not activated. This might be a button on the remote or set itself. If you have a headphone jack, it may have dirty contacts as plugging in a headphone usually mutes the speaker.If the set is mono or only one channel of a stereo set is out, then check for bad connections to the loudspeaker. Test the loudspeaker by disconnecting one of the wires (with the power off!) and measuring its resistance with an ohmmeter (it should be less than 100 ohms - probably less than 8 ohms). Or momentarily touch a 1.5 volt battery to the speaker terminals - you should get a click or pop from the speaker.

Next, trace back from the speaker output terminals to the circuit board and look for bad solder connections or a loose or dirty connector.

If these tests do not reveal anything, you probably need a scope (or audio signal tracer) and schematic. Or at least the part number off of the chip. Is the final amp a chip also or just a transistor? Have you tested the transistor? If there is little or no buzz from the speaker, that would indicate a problem fairly near the output. If the tuner/if were bad, I would expect some noise/humm pickup from the low level audio stages. Get the part number off of the chip. If it is in a socket, check the contacts for corrosion or looseness.


Check the volume setting. It might sound simple, but it's the best place to start. Make sure the television sound is not muted or turned all the way down using the remote or buttons on the front of the television. If the batteries are dead in the remote and the TV is muted or turned down, it might seem like the sound is broken.


Examine cables connected to the TV. Sometimes a loose connection can cause a loss of sound. Ensure all cables are tightly connected to the television and correctly inserted. Some peripherals are connected using a three-plug system and are usually labeled red, white (sometimes black) and yellow. Both the red and white leads are sound cables. Try removing all the cables (except the power) from the back of the television and turning it to TV mode, then listen for static or other sound.


Plug in headphones to the television with all cables re-attached. See if you can hear sound through the headphones. If you can, it may indicate that the TV's internal speakers are not working. If you can't hear anything through the headphones, it may be indicative of a larger problem.

Call a repairman. If at this point everything has failed to produce a sound, it's time to call in the professionals. A qualified technician should be able to fix the problem either at your home or in a workshop.

Aug 17, 2011 | Televison & Video

1 Answer

Hi! I have a Jensen XA2150 Amplifier, from the speaker output I have connected a Subwoofer Sony 10 inch 1100W. Tha'ts gave me a nice bass sound, but now it's death! The amplifier have a 25A fuse,...


Have you checked the fuses inside the amp?Unscrew the cover and with the amp sitting on its back,remove the cover.You have 2-4 fuses,old round type,in there.

May 21, 2011 | Jensen XA2150 Car Audio Amplifier

1 Answer

Hello, my BC246T scanner has no sound, but it stops on different frequencies. I took the back off and try , checking the circuit boads, but did not solve sound problem. Is there anything else I can try. I...


Sorry, but the only mute function is in the external speaker and headphone jacks. Plugging into either one will mute/disconnect the internal speaker. Your scanner is about six years old, so it's possible that the speaker has quit working or that you have a problem with the audio amp. Try connecting either headphones or an external speaker to the appropriate jack. If you get audio through either one then chances are that you internal speaker is shot. No audio at all indicates a circuit problem that needs professional help. You local Radio Shack store can help with either problem. If they don't have the proper speaker in stock they can order one for you, and they can also arrange quality repair of your scanner. CAUTION: If you go the repair route, be sure to get a firm price, not just an estimate before you commit. Repairs can approach or exceed the cost of a comparable new scanner. Good luck and happy scanning.

Bill B
Listening in since the 60's

Oct 05, 2010 | Uniden BC246T Handheld Scanner

5 Answers

Alfa Romeo 166 ICS Radio AUDIO mode is inoperative. As I switch the radio button to the "ON" position by pressing the switch, I get all the tuninig of CD/Casette/FM/AM radio frequencies, but non fo them...


The audio board is at fault. Take the unit in for repairs at any car dealership. They can send it out for repairs to any center that repairs radios for cars

Sep 07, 2010 | 2000 Alfa Romeo 166

2 Answers

I am looking for a diagram or picture as to how to get to the speakers to replace them on a 97 villager??


Section 15-03: Speakers 1997 Villager Workshop Manual DESCRIPTION AND OPERATION Radio Speakers All vehicle sound systems are equipped with radio speakers (18808) located at all four corners of the vehicle. The radio speakers are mounted in the RH front door (20124) and LH front door (20125), as well as behind the quarter trim panels (31012) in the rear of the vehicle. The Ford Super Sound Audio System has the addition of a subwoofer mounted in the RH quarter trim panel.
-----------------------------------------------------------------------------------------
Radio Speakers, Front Door Removal
  1. Remove the front door trim panel (23942). Refer to Section 01-05 .
Trim Panel(s), Door Front
Removal
  1. Disconnect the battery ground cable (14301) if equipped with power locks or power windows.
  2. svv~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Use care when removing the front door inside handle escutcheon (22620). Failure to do so can result in damage to the component.
    Carefully pry off the front door inside handle escutcheon by inserting a standard 1/4 inch screwdriver between the top rear portion of the front door inside handle escutcheon and the front door trim panel (23942).
  3. Remove the three cover caps and front door trim panel screws.
  1. Remove the one front door trim panel capped screw from the door pull handle.
  2. If equipped with power windows, remove the door pull handle. Disconnect the electrical connectors.
  3. Slide a flat-bladed tool behind each of the retainers and twist the tool to disengage the front door trim panel from the front door (20124).
  4. Remove the front door trim panel.

Door Electrical Connections
Removal and Installation
Refer to Section 01-11 for Power Window, Section 01-09 for Power Mirror, or Section 01-14B for Power Locks. Watershield
Removal
  1. Remove the Front Door Trim Panel . Refer to the removal procedure in this section.
  1. Remove the front door watershield by carefully detaching it from the adhesive.
  1. Remove the four front door radio speaker screws.

May 20, 2009 | 1997 Mercury Villager

1 Answer

GE 32GT740 32" TV problem


there are two things that can cause this, 1 there is a muting transistor on the bottom of the PCB that is a surface mount transistor that goes short. this is the channel mute transistor. when you change channels it is designed to mute the static between channel changes. if it shorts then it mutes. 2 the EE-PROM is defective and needs to be replaced. i'de go with the transistor first. if you are unequipped to do this repair have a tech do it.

Mar 02, 2008 | GE 32GT740 32" TV

1 Answer

Amp has burned up


You'll need to replace all three transistors and any other in the same line (unless they're divided by high power diodes). Make sure you check all resistors before replacing anything. Search www.digikey.com for parts, they should have the exact transistors-just put the numbers on the transistors into the search field.

Oct 16, 2006 | MTX Thunder 8302 Car Audio Amplifier

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