hurricanestv
Member
bought this used about 5 or 6 years ago. had this dude running a DVC sub. noticed that the clipping light on the right channel flickered quite a bit, but according to the manual, it wasn't out of the ordinary, and the sub was hitting pretty hard, so i ignored it.
just got a powered sub and pulled the 535 from the system and figured with my newfound knowledge, i'd check the dc offset before moving it to run my newly repaired nht superones. surprise! it's sending 11.5V to the right channel. 20mV to the left. lord knows how long it had been like that...the hum was probably above the passive crossover point on the sub and that voice coil probably never got any signal. :scratch2:
opened her up (beautiful inside with twin power supplies and adcom custom power supply caps) and immediately see one of the two 4A fuses on the right channel is toast. all i have handy are 2A or 3A fuses. plug a 3A fuse in (just to see what happens to DC offset, no plans to run speaks yet). DC offset drops to 31mV on that side.
Next step is to get a 4A fuse and run some cheap speakers for a while to see what happens.
Anyone got a line on a service manual for an adcom gfa-535? assuming he passes the next test, a quick tuneup would be nice.
just got a powered sub and pulled the 535 from the system and figured with my newfound knowledge, i'd check the dc offset before moving it to run my newly repaired nht superones. surprise! it's sending 11.5V to the right channel. 20mV to the left. lord knows how long it had been like that...the hum was probably above the passive crossover point on the sub and that voice coil probably never got any signal. :scratch2:
opened her up (beautiful inside with twin power supplies and adcom custom power supply caps) and immediately see one of the two 4A fuses on the right channel is toast. all i have handy are 2A or 3A fuses. plug a 3A fuse in (just to see what happens to DC offset, no plans to run speaks yet). DC offset drops to 31mV on that side.
Next step is to get a 4A fuse and run some cheap speakers for a while to see what happens.
Anyone got a line on a service manual for an adcom gfa-535? assuming he passes the next test, a quick tuneup would be nice.