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A946 transistor pin function - Audio Players & Recorders

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How do I retrieve a message on sony spp-a946


LEO Privacy is the app for everyone I just downloaded it and I loved it, no one can just enter my phone without permission. It helps me to hide my images and videos. The most important is that it locks my important apps. I love this applock. LEO Privacy Applock Hide Safe Android Apps on Google Play

May 03, 2014 | Sony SPP A946 Cordless Phone

1 Answer

Sys cont ic la863328 cant set to on and not in function


Check all the pin voltages first. Replace the oscillator crystal. Check the frequency of oscillation at the collector lead of the line drive transistor. If all the above, except the frequency at the collector terminal of the line drive transistor, the IC is defective. Replace it. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy.
http://electronicshelponline.blogspot.com/

Feb 14, 2014 | Televison & Video

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29 onida oxigen h out complant


you mean a horizontal output transistor problem with your tv unit?. there are possible cause why a horizontal transistor get bad. it depends to what kind of trouble does the tv unit have. here are some of trouble that i encountered of H-out problem and how i fix it
  • leak regulator transistor, the problem of the tv unit when you turn on it works but suddenly shut down then the horizontal output get bad. now how are you going to know if the transistor is leak and shorted. by means of a digital multi tester or an analog tester. a good transistor must have a reading of .4 to .9 in a digital tester below or above to the range is said to be leak transistor. a regulator transistor is usually found at power supply section. how to test a transistor using the digital tester. get the tester and then pull out the transistor to chassis board. vinceisaac_24.jpg as you can see in the image above is a digital tester some other brands may vary in ranges but all the function are the same. now set the pointer to the resistance checking select to the range with diode sign. a transistor have 3 pins for base, emitter and collector (component term ) with the use of test probe now touch one end of probe either of the 3 pins and other probe to the other pin.check the reading to the display of tester if no reaction reverse the polarity until you find the correct reading as what i said a good transistor is about .4 to.9 and then try this process to the other pin of transistor to check if all the junction are good.
  • defective deflection yoke, the problem with the tv every time you turn on unit the horizontal output get damaged. a deflection yoke composed of two windings for vertical and horizontal coil ( technical term ). now how will you know if the coil has problem. a yoke has 4 wires, 2 wires for vertical and the other 2 wires for horizontal now with the use of digital tester set the pointer to the resistance checking either in a lower range. touch with the test probe either of the 2 wires check the reading if 0000 that means shorted sometimes cause by an over heat the insulation get damaged. repeat the process to the other 2 wires, a good coil at least has a reading about .5 to 1 ohm for horizontal and for vertical around 1.6 to 6 ohms it may vary depending to the yoke needed by the tv unit. vinceisaac_25.jpg the image above is sample of deflection yoke it was located and installed at the neck of ( crt )picture tube. if one of the coil winding has problem it always damaged horizontal output transistor and other part . i hope this trouble that i encountered will help you too to fix your problem good luck.

Jun 03, 2011 | Televison & Video

1 Answer

Power supply zapped by lightning; do you have a replacement power supply?


if you're referring to a replacement battery, please google your model and use the word battery. Otherwise, lightning tends to short out all kinds of stuff.

Sep 28, 2010 | Sony SPP A946 Cordless Phone

1 Answer

Specification of part place in the heat sink of the acer al1716As lcd monitor power supply pcb,i cnnot recognized burnt already,is that IC or transistor.it has 6 pin


Hello,

Transistors are with just three pins, so what you are seeing there should be an ic and not a transistor.

It is ics that have numerous pins, transistor have just three legs(pnp) or (npn).

So what you see is an ic.

Take care.

May 04, 2010 | Acer AL1716As 17" LCD Monitor

2 Answers

My receiver shuts off after 3 seconds.


Between the ground and the "PRD" pin of the CPU, there are three diodes: D503, D504 and D505. The first two seem to be useful to protect the CPU itself against any over-current. In case of short circuit or similar, these 2 diodes can easily blow out, and force to "0" the pin 139 voltage of the CPU ("PRD" pin, dedicated to detect any abnormal DC voltage from output transistors)
This is the reason why the protection circuit shuts-off the unit, even if the faulty power transistors have been replaced

Diodes are normal surface-mounted 1SS355: I've replaced them with two 1N4146, and everything works perfectly now.
Diodes are located in the "Function" board, at the left side of the unit: they are easily accessible

I've realized that the problems seems to be extremely common for this model, so I hope that this hint will be useful in several cases

Oct 28, 2009 | Yamaha RX-V1500 Receiver

1 Answer

Charger problem


A phone charger is supposed not to be serviceable (you must not replace components). As this is a safety device, and even a bad solder joint can cause a serious hazard (fire, shock, phone blown).

The only way to find out the value of this transistor is by using a multimeter with diode tester function and testing the transistor as if it was a circuit of two diodes (that is what a transistor is), see here: Testing semiconductors with analog and digital multimeters. , also Transistor.
If the transistor has blown this will be impossible.
Try also going to a spare component shop with the transistor and circuit, this is what we all do when we do not have the schematics and value.

Being this a $8 charger, better buying a replacement:

Sagem my202C European Mains Charger EU 2-Pin

Sagem my202c Chargers uk 3 pin plug


Apr 15, 2009 | Sagem my301L Cellular Phone

1 Answer

Sony SPP-A946 base unit intermittently charges the hand set.


Clean the contacts on the handset and base that charge the battery.

AL

Mar 17, 2009 | Sony SPP A946 Cordless Phone

1 Answer

How to program speed dial on sony spp-a946 cordless phone


  1. Press 'PGM'- "program" button.
  2. Press "speed dial" button.
  3. Select "station # " i.e. any button from 1-9 for speed dialing.
  4. (make sure to make a note of this selected # against the corresponding tel # and /or the person's name)
  5. Dial the complete (incl. 1 for USA or country code for other country tel. #s) telephone number to be stored for the selected speed dialing station #.
  6. Press "PGM" button again to complete the storing of the tel #.
  7. Test, after dial tone, by just pressing the selected station #

Mar 13, 2009 | Sony SPP A946 Cordless Phone

1 Answer

Monitor horizontal adjust no function


It is the problem of horizantal section.Check horizantan hold transistor that is placed on hitsink of eht and two small transistors near iton pcb.and check horizantal yoke coil pins for dry soldring or low voltages.If thats are ok then change hori. &ver. deflection ic.
Hope this solution works.i am always for you

Mar 15, 2008 | Gateway FPD2275W LCD Monitor

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