Question about Pioneer VSX-27TX Receiver

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No DTS sound / RESET

Hi, I got a VSX-27TX recently, and this unit is not working with DTS sound. I already have tried many discs on 4 DVD players (configurated to dts), as Panasonic S35, LG DR1F9H, Nakamichi DVD15 and DVL 909 hacked for dts out, but NO DTS sound. Already changed the in coaxial/optical digital ports 1 to 4 to DVD/LD and TV/SAT modes, with digital and auto signal select. No sound, only a low noise "tick" on L/R front speakers (the light on panel shows front L/R for DTS only). The big DTS display on panel not appears, only the tiny beside the speakers indicator. Dolby Digital is working fine. Maybe there is a reset for this receiver? My old D906S have the reset botom. I will thank a lot for any tip or the definitive solution.

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Re: No DTS sound / RESET

Hi I have a Pioneer VSX D908S which is basically the same amplifier as yours with the difference that the one I have has no THX certification, as a matter of fact the service manual is the same, and mine has the same problem. The prblem is located in the DSP board, if you are able to remove the bonett, you will see on the right side a metal cover, remove it, once you have removed it, look for a IC9374 it is located, -looking this board in front to you- almost at the left upper corner, this IC has the PDK042A on it, with a soldering iron resolder this circuit. This is common problem with this pioneer amplifiers, and this procedure not always works, the final solution is to buy the DSP board but it is expensive. Good luck! Miguel

Posted on Oct 06, 2007

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Where can i find diagram for bad soldering for pioneer elite VSX-27TX stereo receiver?

You really should be an expert to do repairs on these recivers but if that is the case, you can get the maintenance manual here:

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you can locate the R9371 & R9374 beside or the same circuit of the IC 9374 Very near not far to IC 9374.

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My surround sound won't work now when I play the dvd player

Could be many things - I know, bad answer. There is no simple answer or fix.

Without more info one can only speculate.

Please determine and answer as many or all of the following so that we can help.

1) What is the make and model number of the Surround sound unit?
2) What is the make and model of the DVD player?
3) How is the DVD player connected to the Surround sound unit?
3a) Is it connected via an HDMI cable?
3b) Does the DVD player have regular stereo connections that you are using (we call these analog audio connectors)?
3c) does the DVD player have digital audio outputs that are connected to the Surround sound receiver?
4) Did the DVD player EVER make sound?
4a) if yes - what changed?
4b) if yes - does this happen with different discs?

Now some general points.
I'll assume that the other sources do work and play sound through all speakers when they are supposed to play sound through all speakers.

Then - I'll assume that without changing anything else you select the DVD player input that used to make sound but doesn't now.

Problem could be the encoding option that you have selected when you play the disc.
Many DVD's and Bluray's have audio options that you can select from the disc's main menu.
Dolby digital is the most common - also known as AC3.
Some discs have another digital audio track called DTS.

Not all surround receivers can decode all formats.

Even if your surround receiver claims to be able to decode AC3 and DTS, they will not if you don't connect the correct cable to the receiver and usually map the input to the correct digital audio connection that you are using OR if your DVD player is not capable of outputting all formats.

There are many different ways to connect the gear and many different ways one can configure correctly or not; all contributing to whether you get sound or not.

So in the above example - by selecting DTS, you do not get any sound - then try another audio track option. Basic stereo usually works (also know as PCM - which is audio like a CD).

OR maybe you never properly configured the audio properties of the DVD player.

Go into the DVD's menu or set up options and see what you find but make sure you know how the DVD is connected to your surround receiver!

As you can see - there is no simple answer without a lengthy Q and A exchange first.

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Everytime I use the DTS functions to enable my surround sound, no sound goes to my speakers. I am able to use it only for the standard output with the left and right front speakers. What could be causing...

DTS should be enabled only if your source has a DTS digital audio out connected to the receiver.Mostly only DVD / Bluray players have DTS sound and is outputted through an optical or co-axial port on the back of the player. Its a multichannel digital encryption technology where the signal is sent through one cable and your receiver decodes it into 5.1 or 7.1 channels according to the source.

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if your dvd/blue ray player has digital optical spdif, this can be used to transfer the encoded DD+/DTS digital audio.

the besat way to run your tv audio through the reciever is to hook up the dvd/blue ray player up with (perferrably) digital optical spdif, composite spdif or (least favorably) through the stereo stereo analog inputs on the reciever for "dvd" audio in and hook the video from the dvd/blue ray up to the corresponding "dvd" video component input on the reciever.

this way is only going to get your dvd/blue ray sound, next you need to hook up your cable box to the reciever so that you can get broadcast tv sound. hook up the cable box audio to the "tv" stereo analog audio ins, and hook the video to the corresponding "tv" video component inputs.

the component video inputs have separate jacks for red, green and blue ( labeled "Y" "Pb" and "Pr") and are capable of carrying a 1080p full hd signal. use the component video outputs on the reciever to output the video signal to a component video input on the tv, using the receiver's input selector to change the video source.

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