Denon AVR-X3600H No sound even to pre outs in direct analog mode. Help please!
Hi, I have a Denon AVR-X3600H I'm trying to repair. I have no electronics repair experience but I have a multimeter, service manual and a will to fix it (https://device.report/m/d5de8c00e617...f63147aba9.pdf)
Everything seems to work except for no sound even through the pre outs. However I will get sound using Zone 2 pre outs.
Only digital symptom I can tell is it will soft lock when in the Speakers/Test Tone menu and be unable to adjust +/- db during the test tone.
I've followed the trouble shooting guide, audio check (page 83 in the manual) booted it in service path check mode 1. Analog direct but still no sound.
Looking at the analog audio diagram (page 49) there's only two chips between analog in and pre outs. Input selector (NJU72750) and volume control (NJU72343) however there's two sets of them.
Both input selectors (NJU72750) seem to be good because I can change sources (even digital ones) fine in zone 2
I'm thinking something is wrong with the volume control chips (NJU72343) but it seems unlikely to me that both would die at the same time. I've checked the voltage regulator that powers them and its good, although I haven't checked it at the chip. Its not accessible without taking the essentially the whole thing apart. Also input selectors (NJU72750) are powered by the same rail so I think its fine.
Looking at the schematic (page 24) The only other thing I could think could be wrong is some how the the data connection MVOL_DATA is not making it to the chips. Anyway to test this?
I'm thinking of ordering volume control chips NJU72343 for about $18 delivered from digikey and finding and paying some one to solder them. Does that sound like a good plan?
(Also is there any way to route zone 2 through the third input selector and amplifier to see if those are still good?)
Any help is appreciated Thanks in advance.
Everything seems to work except for no sound even through the pre outs. However I will get sound using Zone 2 pre outs.
Only digital symptom I can tell is it will soft lock when in the Speakers/Test Tone menu and be unable to adjust +/- db during the test tone.
I've followed the trouble shooting guide, audio check (page 83 in the manual) booted it in service path check mode 1. Analog direct but still no sound.
Looking at the analog audio diagram (page 49) there's only two chips between analog in and pre outs. Input selector (NJU72750) and volume control (NJU72343) however there's two sets of them.
Both input selectors (NJU72750) seem to be good because I can change sources (even digital ones) fine in zone 2
I'm thinking something is wrong with the volume control chips (NJU72343) but it seems unlikely to me that both would die at the same time. I've checked the voltage regulator that powers them and its good, although I haven't checked it at the chip. Its not accessible without taking the essentially the whole thing apart. Also input selectors (NJU72750) are powered by the same rail so I think its fine.
Looking at the schematic (page 24) The only other thing I could think could be wrong is some how the the data connection MVOL_DATA is not making it to the chips. Anyway to test this?
I'm thinking of ordering volume control chips NJU72343 for about $18 delivered from digikey and finding and paying some one to solder them. Does that sound like a good plan?
(Also is there any way to route zone 2 through the third input selector and amplifier to see if those are still good?)
Any help is appreciated Thanks in advance.
Comment