The DSP modes in my receiver stopped working so I can only hear things from stereo mode. It started as a periodic thing but now is streao only. Any suggestions? Hve I overheated the unit somehow? Perhaps a blown fuse? Any help wll be appreciated
I had (have) the same problem. It didn't seem to have any particular cause or reason why it would start or stop. I got tired of this & purchased a refurb Onkyo (shoponkyo.com). As long as I felt I had nothing to lose I took the cover off the KLH & started pulling & reseating the remomable plugs. When that didn't help I started banging different components. When I hit a black semiconductor on the right side I heard a pop, like when I would lose the surround. It is labeled "MX" just along side there is a paper label(0270100). It is the largest black semiconductor on the main board.
I then banged it a bit harder a few more times & the surround was back & worked fine. a few days later I lost the surround again. A few knocks on the "MX" brought in back again. I can't tell for sure if this can be pulled & reset, but for now I am leaving the cover of & am ready to give "MX" a couple of shots with a screwdriver handle.
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If everything is connected correct, the only thing I can think of, is you don't put in a surround signal. If you only feed 2 way stereo, only two speaker will work. Also if you switch to stereo, the other channels will stop working. Check the cables, the settings and the input.
Sounds like it may have a DSP failure. Straight stereo signals bypass the DSP stages. Could be an expensive fix. I suggest you take it to a Hitachi agent for a quote. Not something that can be easily fixed on the kitchen table I am afraid.
This sounds like a problem with the DSP chip. Turn off any DSP and surround modes in the unit and see if it at least plays in stereo. You may need to unhook the DVD player from the 5.1 inputs and put the front left/right into a CD or TAPE input to fully test this theory. If that doesn't work, I have a VSX-D309 that just came up for sale (sorry, no remote)
1) See if your receiver is in Stereo mode. 2) You can change your audio preferences from within your DVD menu from Stereo to surround. 3) Change receiver and dvd audio menu options to Dolby ProLogic surround.
Did it ever work properly? If not, let's get down to basics and set it up for the simplest configuration it can have: FM source in stereo with front left and right speakers, no Surround Mode, no DSP, no Tape Monitor, no Mute, Volume not turned all the way down. Does that work?
Do you have Surround Speakers defined in System Setup A? If not, only Dolby Surround or Off are valid Surround Modes.
Is T2 Monitor indicator lit? Press the Tape-2 Monitor.
Is there acceptable sound other than during Speaker testing? NO? Is MUTE On?
THE BEST SOUND IS WHAT SOUNDS BEST TO YOU, HOWEVER DO THIS:
1, USING THE SETUP MIC CONFIGURE YOUR DENON, PAGE 8 OF THE MANUAL. NEXT
2. RAISE THE REAR SPKR LEVELS, PAGE 46,47. NEXT
3. WHEN LISTENING TO AUDIO CD OR RADIO TRY THE 5 CH STEREO DSP MODE.
4. WHEN WATCHING A DVD USE DSP DOLBY PROLOGIC OR TRY 5CH STEREO IF THE MOVIE IS MOSTLY TALKING.
5, TRY 5CH STEREO WHEN WATCHING PROGRAMS WITH MOSTLY TALKING
Front panel button engaged for 5 or 7 channel operation? Also check front panel rear surround speakers button is engaged. Should get you back to 7.1 unless you have changed the rear surround speaker setup for a 2nd zone, also be sure you have a 7.1 DSP setting enabled.
Can I assume the calibration procedure also didn't work for the Front left channel? (It's not a "surround" if it's in the front). Switch the receiver to Stereo mode to eliminate any DSP actions. Tune an FM station to eliminate any external device or cable issues. What do you hear from the two Front speakers?
OK? Select a DSP surround mode. Check all modes. What happens?
If the channel goes dead using some or all DSP modes there's probably something wrong with the processor. If they all work...
Isolate the source that exhibits the problem.
It was a bad left channel cable somewhere, wasn't it?
Chances are if The Receiver only has sound in Stereo Direct Mode and all surround modes and Sub out are Inop the DSP (Digital Signal Processing) Card is most likey defective. These boards are not available from marantz (D&M Holdings) and must be Component level repaired which usually is not cheap. If Only the Sub out is not working check setup to be sure sub woofer is set for on. Also If On Screen setup menu does not appear on video monitor Unit may need to be Reset manually which entails discharging a Capaitor on main P.C.B Contact email@example.com for details