Why no sound from denon dra-375rd? - Yamaha HTR-6130 Receiver

https://www.cnet.com/forums/discussions/denon-receiver-problem-video-but-no-sound-328661/

https://www.hifiengine.com/manual_library/denon/dra-635r.shtml

Most subs are 4 ohm cabinets. That being said, if you added this to one of the channels alone, fine. If added while another speaker was also connected (A+B mode) and the other was a 4 ohm cab as well, then yes, you probably smoked that channel. The two 4-ohm cabs in parallel like that appear to the amp like a 2-ohm load. This amp is designed for a 4-ohm load minimum. It is likely that the output stage overheated and damaged the output transistors. I would have expected the amp to go into protect mode though. Let the receiver cool down and try again. If it works, then the problem is the low load and removing the sub will "fix" it. If not, then further examination of the output stage will be necessary.

Dan

There is a main fuse located either close to where the AC cord enters the unit or under a PC board attached to the transformer. In any case, it is unlikely that the fuse is the real problem. Is there a standby light at all or nothing at all? If there is a standby light, the fuse is fine. If the unit won't stay on or turn on, the problem could be a bad 5V supply or shorted outputs.

Please update this with any additional symptoms and I'll provide additional details.

Thanks,
Dan

tape 2 should have a "monitor" button that goes along with it.

turn it off and sound should return

In this case the output transistors are probably shorted. With the unit unplugged, check the pins of the output transistors (center to either outside pin) and if they read shorted, they need to be replaced. It is possible that the previous stage will also have shorted components. If you have no experience with this type of repair, see a service shop. The parts should not exceed $25.

Dan

your door on the in side has 4two5 rods inside to tell what it is you will have to take off the door panal and try wd-40

The unit is rated at 120 watts total output ( 60 watts per channel x2 channels) As far as being worth fixing it depends on the price of the parts and what you want to do after its fixed. I looked around a little and the unit gets good reveiws from owners. They say its great for a "just music" system.

Thank you for responding. I called in an audio specialist to look at the whole system--he believes there is a problem with the amplifier. Will post what he finds out when he looks inside.

Hi,
Owner's Manual is PN 3834RH0020U
On pg13
1. Press TUNER/BAND to select AM or FM
(Leftmost rectangular button on left of volume knob)
2. Select station by using TUNING +/-
3. Press PROGRAM/MEMO on the remote
A preset number will appear.
4. Press PRESET +/- (or PRESET ^/v on remote) to
select the preset number you want.
5. Press PROGRAM/MEMO again. The statio is stored.
6. Repeat above for more stations.

Believe you can store up to 30 stations.

Tony, this is an incorrect substitution. The cap voltage should be higher. They probably ran out of the cylinder types. I'm surprised to see such high capacitance value however.