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You need to check the connection of the lead that carries the audio from the DSS to the amp, move it to one of the other channels ie vcr and see if it can be heard when set to and switched to vcr. Then we know if we are dealing with the Amp or the source..
hello do you mean is total dead if so check the glass fuses inside, but beware if you put another 1 in and it blows again then theres a dead short someware also make sure you use the same rated fuses the value will be on the end of the fuse or on the fuse holder on the power board. fingers crossed.
the best thing to do is a code search per the directv manual and hope the Marantz powers off when you find the code.
If it turns off, you have won half the battle. Save the code and try turning the Mar back on.
The issue is that these universal satellite remotes are very limited on there funtionality with audio systems.
Keep in mind that if you find a code that turns it on & off, you will probably be limited volume only. If you get those three functions, you are very happy and call it done.
Hope this helps.
This goes for all sounds systems and not only Marantz.
There is a 1 Farad "super capacitor" that needs to be replaced. You need soldering skills to do it. The board is accessible if you remove the front panel of the receiver. The part # is DB-5R5D105; you can get them on eBay for about $2.00 each. Regarding the center channel issue, you may have a bad solder joint on the P781 connector on the P774 board. This is the board that houses the output transistors for the 3-channel main amp board (P704). If not these solder joints, you have a weak driver transistor on P704, and troubleshooting would probably be best left to a pro. Good luck!
The stock remote for the SR-18EX is the RC-18SR - that's the one it shipped with when new. You can also use the RC-2000, RC2000 MkII, and I have an aftermarket RC-1400 that works perfectly with my SR-18EX, AND offers 15 macros instead of the standard 4 you get with the stock remote.