glenn jarrett
pfm Member
Got hold of a SM80 power amp
no relay click
all semis seem ok
but every single capacitor so far except the power supply way out of spec
changed the caps in the secondary power supply board a lot of heat damage to the pcb and a few lifted tracks (shite pcb )
thats now working
and i have a relay click
but 250mv drifting dc offset on one side
and 20mv the other
hopefully changing the rest of the caps will sort this out another 16 caps to go
nn by glenn jarrett, on Flickr
nm by glenn jarrett, on Flickr
20210324_163908 by glenn jarrett, on Flickr
20210326_120821 by glenn jarrett, on Flickr
20210326_122848 by glenn jarrett, on Flickr
20210326_123108 by glenn jarrett, on Flickr
no relay click
all semis seem ok
but every single capacitor so far except the power supply way out of spec
changed the caps in the secondary power supply board a lot of heat damage to the pcb and a few lifted tracks (shite pcb )
thats now working
and i have a relay click
but 250mv drifting dc offset on one side
and 20mv the other
hopefully changing the rest of the caps will sort this out another 16 caps to go
nn by glenn jarrett, on Flickr
nm by glenn jarrett, on Flickr
20210324_163908 by glenn jarrett, on Flickr
20210326_120821 by glenn jarrett, on Flickr
20210326_122848 by glenn jarrett, on Flickr
20210326_123108 by glenn jarrett, on Flickr