AJMatthew
New Member
Got a C-70 with the infamous right channel dropout. When I got it I cleaned it with deoxit but paid attention mostly to the green side since I am just getting into vintage gear and not sure exactly what to look for. So I have several pics with questions if anyone can answer them I'd love to hear any advice or discussion.
The underside has some dark areas in particular. Does this grantee a part needs to be replaced? What causes this?
On this thought does a dark side correlate directly to the other side? There are three leaking caps in this area but no black underneath those.
What should I look for in a leaking cap?
I'm pretty sure one of the aspects of leaking cap is when block crusty residue emits from below. Does a cap bulge before leaking? Do they happen separately?
Below is a picture of the source of some suspected bad caps that had black crusty spread wide over other circuit parts. Does this ruin those?
Does a part look bad but perfectly fine? If there is a burnt color above it would this be a part that needs to be replaced?
What traits are there to look for in parts going bad? Are these bulging, or just look funny?
I am curious if this unit has been serviced on. The circled relay switch does not match the other Matsushita HB2E-DC24V parts. It not only is a different shade of orange, but the label is different, but the part number is the same. More relays could have been replaced or none, what is the best way to tell? Multimeter?
The underside has some dark areas in particular. Does this grantee a part needs to be replaced? What causes this?
On this thought does a dark side correlate directly to the other side? There are three leaking caps in this area but no black underneath those.
What should I look for in a leaking cap?
I'm pretty sure one of the aspects of leaking cap is when block crusty residue emits from below. Does a cap bulge before leaking? Do they happen separately?
Below is a picture of the source of some suspected bad caps that had black crusty spread wide over other circuit parts. Does this ruin those?
Does a part look bad but perfectly fine? If there is a burnt color above it would this be a part that needs to be replaced?
What traits are there to look for in parts going bad? Are these bulging, or just look funny?
I am curious if this unit has been serviced on. The circled relay switch does not match the other Matsushita HB2E-DC24V parts. It not only is a different shade of orange, but the label is different, but the part number is the same. More relays could have been replaced or none, what is the best way to tell? Multimeter?
