Namco Cyber Lead Audio Amp 8662966100 troubleshooting/repair

[notsonic]

I have two of these amps. One is the original that came with my cabinet, and the right channel doesn't work. The other is a Yaton special which stops working after a minute. Since these are of an age where they could have problem caps, I'm going to put a cap list together and try that first.



Breaking it down, there's an amplifier IC, a handful of surface mount electrolytic caps, one through hole, and a noise filter IC with it's own little surface mount electrolytic caps. And then there's just the connectors, volume pot, and assorted surface mount resistors and ceramic caps.

• IC1: BA3121
• IC2: LA4705
• C1: 22uf 10V
• C2: 4.7uf 25v
• C3: 4.7uf 25v
• C4: 4.7uf 25v
• C5: 10uf 16V
• C6: 4.7uf 25v
• C7: 2.2uf 50V
• C8: 100uf 16v
• C9: 47uf 16v
• C10: 2.2uf 50v
• C11: 1000uf 16v (through hole, radial, electrolytic)

Edit: I've written down what the markings look like so far. I'm not too familiar with identifying electrolytic smd caps.

 

[imbord3rlin3]

good looks on writing the cap list. saved me a lot of time. im gonna make a list of everything in mine too in january. good luck!

 

[notsonic]

Recapping fixed the one with no right channel. I didn't try fixing the other one.



This was the first smd cap replacement I've done since I ruined a PS One (which was the first one I ever tried a few years ago). I used a cheap hot air rework gun to remove the old caps and just installed them with a soldering iron. Tin one pad, slide it in, hope its flush and sneak solder into the other pad. I'm sure there's better techniques but it worked for me.