darkhosis
Active Member
Ever since my $40 SX-780 went as a gift to a friend for mixing work he did for me, I've been yearning for a Pioneer receiver. My Sansui 5000A is a strong capable machine but it doesn't quite work as well with my KLH Model Fives as a daily driver. Something about the bass, I prefer the Pioneer design - at least in my living room .
Drove home with this 1010 last night bought from another hifi guy who was purging. Thanks to people here on the board, I knew that I should expect to put some work into this 1974 TOTL. It's been 2 years since my first failed attempt at fixing a 636...redemption time: got proper tools, enrolled at the local community college electronic program, and (hopefully) wisdom from some experience.
Initial report:
Cosmetically pleasant, one of the tone pot shafts is bent slightly but I can fix that with a needle nose pliers and slow patience.
First step will be to remove as much of the dust inside as possible. I use a paint brush, toothbrush, vacuum and compressed air. I've been recapping music gear both modern and vintage, and these boards seem a tad brittle in comparison. Anything to watch out for?
Main power caps measure: +55.8/-55.9 V DC
test point 19 : L, -30 mV DC // R, 17 mV DC
test point 14+16 : -17 mV DC // -11 mV DC
DC offset : L, -31.3 mV DC (unstable) // R, 19.3 mV DC
It's been serviced and I can tell the L amp board (near the transformer?) has been moved but I can't see what's been worked on.
R amp board:
It looks like heat damage to the board underneath those red resistors (?) but it's plain as day on the power supply board:
At the seller's house the receiver started making intermittent crackling (once every 2-3 minutes) in the L channel after running for about 10-15 minutes. Could this be the source?
Nothing else was visually standing out. The next step towards getting this into my living room and audio heaven is a parts order. Hoping the eagle eyes in this forum might catch a thing or 2 Im missing?
Happy Sunday!
Drove home with this 1010 last night bought from another hifi guy who was purging. Thanks to people here on the board, I knew that I should expect to put some work into this 1974 TOTL. It's been 2 years since my first failed attempt at fixing a 636...redemption time: got proper tools, enrolled at the local community college electronic program, and (hopefully) wisdom from some experience.
Initial report:
Cosmetically pleasant, one of the tone pot shafts is bent slightly but I can fix that with a needle nose pliers and slow patience.
First step will be to remove as much of the dust inside as possible. I use a paint brush, toothbrush, vacuum and compressed air. I've been recapping music gear both modern and vintage, and these boards seem a tad brittle in comparison. Anything to watch out for?
Main power caps measure: +55.8/-55.9 V DC
test point 19 : L, -30 mV DC // R, 17 mV DC
test point 14+16 : -17 mV DC // -11 mV DC
DC offset : L, -31.3 mV DC (unstable) // R, 19.3 mV DC
It's been serviced and I can tell the L amp board (near the transformer?) has been moved but I can't see what's been worked on.
R amp board:
It looks like heat damage to the board underneath those red resistors (?) but it's plain as day on the power supply board:
At the seller's house the receiver started making intermittent crackling (once every 2-3 minutes) in the L channel after running for about 10-15 minutes. Could this be the source?
Nothing else was visually standing out. The next step towards getting this into my living room and audio heaven is a parts order. Hoping the eagle eyes in this forum might catch a thing or 2 Im missing?
Happy Sunday!
(I've had mine a week and am still in awe. 
)
