Question about Sony STR-V444ES Receiver

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The remote volume control fails. It can be caused to work again for a short time by manipulating the control. How do I get at the control to replace it. Where can I get a schematic?

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You can find a remote replacenment at sony autorizad service center if they dont have it in stock they will order it for you the service manual is hard to get at this time
try this number for parts
1-800-488-SONY (7669) good luck

Posted on Dec 19, 2009

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PO508


why say that is false, its not, the PCM does tests, and if they fail
they are truth, for sure. only why it fails matters.
some fails are indirect
why replace the most expensive part first? odd that.
why not find true cause.?
the key to understanding EFI and PCMs. is to know
how they work, its just a computer , if the inputs lie the PCM messes up. if the actuator is bad, the PCM has no control of it. its bad.
the 508 code dont mean to change a part, the PCM is not human.
we do the test detailed in the FSM to find true cause.
then replace that.
so the fsm says
Idle Air Control Motor Sense Circuit Low Input and
The PCM detected the IAC Motor Sense circuit current was less than 175mA during the CCM test period. Possible Causes:
  • IAC motor driver circuit is open or shorted to ground
  • IAC motor sense circuit is open or shorted to ground
  • IAC motor is damaged or it has failed
  • PCM has failed (note its last and is 1% changes here. or none.

in simple terms,
THe PCM can not control idle, you will see that. easy, driving car.
The PCM controls this AIR valve at all times, controlling idle RPM
by adding or stubtracting AIR.
The PCM has the MONITOR (like a NANNY) that monitors the IAC at all times, (at the same time as it uses it)
its a test. it see the ISC motor current is wrong.
the IAC seems to have and OPEN COIL inside, or the connector fell off ,is corroded or the wires to it snapped.
a technician checks the IAC, carefully the FSM shows all the steps
here even to the point of measuring the coil. and other checks.

that is how it is done.
most shops gander at it and just replace it, then when it fails again, a new pCM then when it fails again, oh crud, some bloke, wired in a
stinking auto remote start to this IAC and cut the power feed to it.
$1000 later , a 10cent fix. in 1minute flat.
guessing can be expensive

Jun 30, 2014 | 2003 Chrysler Voyager

Tip

Acoustic Authority A-3780


The Acoustic Authority A-3780 speaker system was an awesome unit blowing away all other competitors in it's price range. One would pay four or five times more to get similar results. Some owners have even used the system for Karaoke and keyboards on stage (very demanding and not recommended) in small venues. That's the good news.

The bad news is that the parts used failed often, especially in the remote control. But if you own one, here's a few general electronic repair solutions to help keep you up and running.

Problem: Remote won't turn on the speakers.

The power on switch is usually broken. They don't seem to last long.
1 Replace it if you can find one...good luck.
2 Replace with another switch design with a little modification to the remote case.
3 Remove it and resolder wire jumpers where the switch was on the remote board so that the unit is always on unless you unplug it or turn it off using a surge protector. As this system did not have a delay circuit per power on and speakers on it will work the same.

Problem: Scratching noises when changing the volume control on the remote.

Oxidation/wear on the volume potentiometer. Using a electronic contact cleaner will clean it up for awhile.
1 Replacement is best but you probably won't find the part.
2 Keep the remote volume fixed and use the computer volume to adjust.

Problem: Loud buzzing from the speakers. Tests:
1 Do the speakers still play audio even though you hear the buzz?
2 Does the buzz go away and the audio is OK on a headset plugged into the connector on the remote?

If yes then chances are one or both of the large 10,000uf 50v electrolytic capacitors on the main power board in the sub woofer has blown. These are filter capacitors to eliminate AC voltage in the DC. When one fails you can get a loud AC 60 cycle hum at the speakers. Check to see if the capacitors are flat on top. If one or both are bulged upwards then the capacitor has vented the electrolytic fluid and failed. Replace them both even if one failed. They cost $5.00-$20.00 online. You can also find them sometimes in audio power amps/receivers if you have a broken one in the closet.

Problem: No audio, no lighted remote. All connections are correct.

Check all parts on the sub woofer power board for any visual failures. When ceramic capacitors fail they usually blow up. Check resistance on all resistors looking for shorts or opens. Get a DVM with Diode Check (example Fluke 77) and check the diodes. Also check the large power transistors for shorts or opens. Just read the resistance across the transistor pins and see if they all match between each other. The specific value in not important. If one is mostly shorted or open compared to the others then it has failed.

on Aug 30, 2011 | Audio Players & Recorders

1 Answer

We have also lost the manual for the RCA DTA800B1 converter box and need instructions to program the remote to work with a Sharp TV.


Press PGM on the remote control. The signal indicator on it remains lit.Enter the 3-digit program code with the number keys. Press OK The signal indicator will be o when the program is one.Press the volume keys on this remote control to check if they can adjust the volume of your TV set.• If you fail to control your TV set,repeat steps 2 to 4 to program again. Try another program code if there is more than one for your TV brand.• If the signal indicator remains lit after blinking four times, you may have
entered the wrong code. Repeat steps 3 to 4 to program again. Make sure you have correctly entered the code.• You can still use your TV remote control to turn on your TV set, select input source and control the volume.for conrmation.your sharp tv code is 005, 021, 071, 085, 087, 092, 128, 183, 208, 274, 298

Sep 16, 2011 | Televison & Video

1 Answer

Volume on remote does not work


Many times this is caused by debris on the carbon pads associated with the specific buttons, in your case the volume buttons, although if this is the cause I suspect other buttons to be in similar condition. The volume is likely used more than the other buttons thus failing first. The control must be disassembled and the specific pads cleaned with a Q tip and isopropyl alcohol and the mating surfaces on the circuit board. If this still does not solve the problem the carbon pads can be resurfaced with a chemical sold at electronic suppliers such as MCM electronics (can be found online using Google).

Sep 05, 2010 | One For All URC-4330 Remote Control

1 Answer

My memorex televison channels won't turn and the volume won't work either. What trouble shooting should i try?


Ur manual control on tv,still work everythings?Replaced the remote very common in remote use it for one or two years.Website 1-800-Remotes Factory Original,buy an orignial remote or very close to it.The CPU in the remote is not completely just shorted,not dead just cause some functions is dead.

Jan 12, 2010 | Memorex MLT3221 32 in. LCD TV

1 Answer

Remote has failed to work. It's not the batteries.


It is possible that you spilled something on your remote which has caused it to fail or it is possible that the remote is just broken. If you have the skills to take it apart and see if there is a problem inside, then go for it. Otherwise you can order a new remote control from a site like www.newremotecontrol.com

Jul 28, 2009 | Coby DVD-224 DVD Player

1 Answer

We have been given a new remote control but the volume does not work and when we try to turn over it works for ma minute then stops working altogether


Hi, I think you have a something (an object or liquid) inside the buttons that is causing a short on the remote control board. When you turn the remote control over, the object does not touch the remote control board, this is why the remote control works. I would turn the remote control over and just tap on it firmly a few times. if that does not work, then you might use a blow dryer on the remote control Key. Let me know the outcome so that I can further assist you. Thanks, Mike H

Nov 02, 2008 | Televison & Video

1 Answer

Volume knob quirks


if you know how to repair, then replace the volume control switch. it is a digital type/mechanical type of switch with silicone oil on it to prevent sudden turn of volume. if i were the repairman i can simply clean the contacts of the volume control and pour silicon oil again. but i really dont know in your area if they try to clean those.

May 03, 2008 | Yamaha RX-V1200 Receiver

1 Answer

Volume controls dont work when using remote


I would start by trying other codes on the universal remote. Sometimes codes will only work part of the remote such as the numbers or channels but not volume. Your motorola cable remote sounds like it may only need a good cleaning. sometimes when you take remotes apart it will look like somthing got spilt in it. I would start there first.

Mar 17, 2008 | Sanyo DS27910 27" TV

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