1ProudAirman 12 Posted July 28 Posted July 28 I've been working on my new-to-me HR-772 receiver, and I could use some help. I picked up the receiver from FB marketplace for $120, which I think is a steal, but it has a couple of problems. I noticed that when I would turn up the volume the sound would get "thin", also, that the remote control would not work. I looked at the main caps and saw that they were bulging a bit, so I replaced them along with all of the other caps on the main board with hi quality caps. Here's where the problem began. Now when I turn it on, it goes in to protection mode after about 5 seconds. In that time, I can verify that the remote control works, but now the entire system goes into standby/protection mode. Does anyone know the proper voltages that should be expected out of each of the main transformer leeds, and after each power supply filter caps? I think I might be getting too much voltage out of the transformer, but it may be something I did. If anyone has any advice or information they can share about their experience, I'd be very grateful. Thanks 8
1ProudAirman 12 Posted July 28 Author Posted July 28 I have downloaded the Owner's and Technichian's Manuals from here, and they are helpful, but I'm either not seeing the voltages, or they aren't listed. Any help is appreciated. 2
Sk1Bum 11,403 Posted July 28 Posted July 28 Hello 1ProudAirman and welcome to thecarversite.com. Glad you found us, and thank you for your service. I wish I could help you out, but the last time I tried to fix electronics, I burned myself when I discovered I was holding the soldering iron upside down. The Carver receivers are popular here, so hopefully someone with experience working on and servicing them will chime in and suggest some places to start troubleshooting. 1
BobTFM35 2,767 Posted July 28 Posted July 28 (edited) Welcome to the Carver Site!! Do you have a reference number from the schematic or the board for a few of the item's you are looking at? Edited July 28 by BobTFM35
1ProudAirman 12 Posted July 29 Author Posted July 29 14 hours ago, BobTFM35 said: Welcome to the Carver Site!! Do you have a reference number from the schematic or the board for a few of the item's you are looking at? That's a good idea, I'll look through the photos, I'm sure I'll find some reference numbers. I'll post what I find. Thanks
Rob 5,977 Posted July 29 Posted July 29 Welcome!!! Do you have speakers or CD players or any input equipment still connected? Just wondering if you have tried both ways ( by itself and with speakers and input items) and it is doing the same thing?
Rob 5,977 Posted July 29 Posted July 29 On 7/28/2025 at 8:11 AM, 1ProudAirman said: I think I might be getting too much voltage out of the transformer I don't think that's the case if it is ok for a few seconds and then going into protection. 1
1ProudAirman 12 Posted July 29 Author Posted July 29 6 hours ago, Rob said: Welcome!!! Do you have speakers or CD players or any input equipment still connected? Just wondering if you have tried both ways ( by itself and with speakers and input items) and it is doing the same thing? Thank you for the question. I initially tried it with nothing connected, but added speakers to see if there were any audible signal, or if it would act differently, but there was no change. I didn't add anything else because I didn't want to risk damaging something else. Thanks again. 1
Rob 5,977 Posted July 29 Posted July 29 Since this is the welcome shop topic, you might want to start a new thread in the receiver area. 2
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