Hi so I have a hcca1004 on the bench,
Amp powers up and idles at 2amps, makes clean audio on both right rear and left channels.
There's no audio on left front or right front terminals.
On power up the amp lights a solid blue led and a solid green led.
There's another green led which remains off.
Internally the amp looks nice and original, no signs of work, damage or repair.
Any thoughts on where to start with this one appreciated, thanks.
Amp powers up and idles at 2amps, makes clean audio on both right rear and left channels.
There's no audio on left front or right front terminals.
On power up the amp lights a solid blue led and a solid green led.
There's another green led which remains off.
Internally the amp looks nice and original, no signs of work, damage or repair.
Any thoughts on where to start with this one appreciated, thanks.
On the board the working channels are labelled ch3 and ch4
No audio on ch1 and ch2
RCA inputs all tested and working
38v dc on both output rails
No audio on ch1 and ch2
RCA inputs all tested and working
38v dc on both output rails
Photo of the board?
Have you tried operating all of the pots and switches through their entire range with a signal source connected and a speaker connected to the dead channel to see if the channel ever produced any sort of sound (even if it was just static/noise)?
Have you tried operating all of the pots and switches through their entire range with a signal source connected and a speaker connected to the dead channel to see if the channel ever produced any sort of sound (even if it was just static/noise)?
Do those points correspond to the two working channels?
If so, if you inject audio into the corresponding pins on the right-side connector, do you get audio on the dead channels?
If so, if you inject audio into the corresponding pins on the right-side connector, do you get audio on the dead channels?
Turned out to be dry solder joints under one of the verticle crossover boards, all good now.
