G
google@pharkus.homeip.net
Guest
Alright this thing is really getting on my nerves.
I want a list of conditions that the microcontroller in this unit can
detect which would cause it to turn off.
There is nothing wrong with the power amplifiers. At one time I had
this receiver running for two days with no problems whatsoever. At the
time, I believed there was a bad solder connection on the upper
amplifier board (the one containing all the voltage regulators and the
surround amplifiers), as barely tapping said board would cause the
power to turn off. I removed the board, resoldered everything large
(typical failure points) and reassembled. There was no change. I once
again removed the board, and resoldered a bunch more stuff (things
that looked cold/weak) and reassembled again. Now it shuts down EVERY
time. I press POWER, it turns on for about three seconds, then shuts
off. Sometimes the speaker output relays click on then back off
immediately at the same time as the power turns off, other times the
only click is the power supply relay.
The original failure caused the reverse diode on the power supply
relay to short. I replaced said diode.
Since I KNOW none of the power amplifiers are shorted, I accepted the
risk of bypassing the power supply relay. Apparently the computer in
this unit is smarter than me, since, even though it could no longer
actually turn off the power, it still blanked the display and stopped
responding to user input, as if it were off. The power amps do work in
this state, as I can inject a signal and drive speakers with them,
further proving that there is no actual fault to respond to. I am
strongly of the opinion that the microcontroller has been smoking
something it really shoud be sharing with the rest of us.
I want to know what conditions will trigger the computer to turn the
power off so that I can first try to figure out what is actually
wrong, or, failing that, trick it into minding its own business and
leaving me alone. Elsewise the whole thing is going to the basement
where I will shitstomp it and mangle it in ways Yamaha never imagined.
Please give me some input on this unit. I've never had this much BS
with an amplifier in my life, and after a similar experience with a
Yamaha powered mixer (TONS of bad soldering on the power supply board)
I am quickly losing any respect I ever had for Yamaha. Nice features
and would probably be good products IF THEY'D LEARN TO FREAKIN SOLDER.
I want a list of conditions that the microcontroller in this unit can
detect which would cause it to turn off.
There is nothing wrong with the power amplifiers. At one time I had
this receiver running for two days with no problems whatsoever. At the
time, I believed there was a bad solder connection on the upper
amplifier board (the one containing all the voltage regulators and the
surround amplifiers), as barely tapping said board would cause the
power to turn off. I removed the board, resoldered everything large
(typical failure points) and reassembled. There was no change. I once
again removed the board, and resoldered a bunch more stuff (things
that looked cold/weak) and reassembled again. Now it shuts down EVERY
time. I press POWER, it turns on for about three seconds, then shuts
off. Sometimes the speaker output relays click on then back off
immediately at the same time as the power turns off, other times the
only click is the power supply relay.
The original failure caused the reverse diode on the power supply
relay to short. I replaced said diode.
Since I KNOW none of the power amplifiers are shorted, I accepted the
risk of bypassing the power supply relay. Apparently the computer in
this unit is smarter than me, since, even though it could no longer
actually turn off the power, it still blanked the display and stopped
responding to user input, as if it were off. The power amps do work in
this state, as I can inject a signal and drive speakers with them,
further proving that there is no actual fault to respond to. I am
strongly of the opinion that the microcontroller has been smoking
something it really shoud be sharing with the rest of us.
I want to know what conditions will trigger the computer to turn the
power off so that I can first try to figure out what is actually
wrong, or, failing that, trick it into minding its own business and
leaving me alone. Elsewise the whole thing is going to the basement
where I will shitstomp it and mangle it in ways Yamaha never imagined.
Please give me some input on this unit. I've never had this much BS
with an amplifier in my life, and after a similar experience with a
Yamaha powered mixer (TONS of bad soldering on the power supply board)
I am quickly losing any respect I ever had for Yamaha. Nice features
and would probably be good products IF THEY'D LEARN TO FREAKIN SOLDER.