I am from India. I have a 3 yr old RX 7042 S A/V receiver. Now, there is no sound...just a display showing 'DSP - NG' . I took it to the authorised service JVC service centre..and it is still lying there for the last 7 months. The guys there says...we are trying this & that, changed that Chip, this Chip. I don't know what to do...3 weeks back they said they have solved the problem and I paid 3000 Indian Rupees (around 75 US$), but there was sound only from the analoge source. Anyone there to help me?
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Re: JVC A/V Receiver RX 7042S - DSP NG
It seems the problem of your unit is in the power amplifier section,the IC chip there is defected that why only analog source .you better bring back to them the unit it is the only option, that is there back job...
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Bad DSP chip. The only other possibility is if you have the "Direct" on. On the front of the receiver it's a small button. Also make sure your "Speaker Select" A/B is "on" You will see it on the display, it's also a small button on the front of the receiver. If all this is correct and you still have no audio, it's a bad DSP chip. Not worth repair, it's 400-500 repair. Not very common in a Yamaha RX-V series, but I have seen it. I'm a Yamaha Dealer. If you need further help, post a comment and I will be glad to help you further.
After few sec when you turn on your receiver did you hear a click noise ? if yes your receiver is OK not in protection mode if no click noise is output protection in that case you must return where did you buy for service and update firmware a lot of update
However you can reset your receiver and debug the DSP section ( digital signal processor ) as follow
1. Press and hold down VCR/DVR button, then press STANDBY/ON button when the unit is Power on.
2. After " Clear " is displayed, the preset memory and each mode stored in the memory are initialized and will
return to the factory settings, and turn to Standby mode.
Now turn back on and check if it work or not and make sure check input mode such as analog or coaxial or optical input if stil no sound then debug DSP as follow
To set in DSP debug mode
1. Press and hold down DISPLAY button, then press STANDBY/ON button while the unit is powered ON.
The version number of m icroprocessor is displayed only for 3 seconds.
2. Press TONE+ button within 3 seconds above, the version number of 1st DSP is displayed.
3. Press DISPLAY button while the 1st DSP version is displayed. The status of DSP and DIR will be displayed.
FFFFFF0 0 000
Press STANDBY/ON button.
Then unplug the unit for 30 sec then plug in it should work now if not you need to return it to 1 of the service center Onkyo in your town to repair it