Forum Replies Created
April 12, 2018 at 10:51 am in reply to: PCB testing troubles #3260
I’ll send you some pictures by email. The sparks were generally going straight up from the resistor, so I don’t see much of a black spot on the board.
GrantApril 12, 2018 at 9:24 am in reply to: PCB testing troubles #3257
Geez, sorry I need so much handholding. The 120 ohm R15 resistor does not glow or spark when the tube is removed. Just to be clear, it starts glowing first, then began to spark, like a small fireworks sparkler. It’s quite … sparky.
I also took a look at the solder side of the board, and there doesn’t seem to be any connections from R15 to nearby soldering points.
GrantApril 11, 2018 at 7:25 pm in reply to: PCB testing troubles #3252
Okay … progress, I think. I bridged the P4 and P5 pads, like you suggested, Brach. Amp seems to turn on, but the 120ohm resistor at R15 glows and sparks. Assuming I fried it somehow. Is it soldered wrong? If I order a replacement, what values should I look for in terms of wattage, etc?
GrantApril 10, 2018 at 1:45 pm in reply to: PCB testing troubles #3247
I took the board apart last night to check for potential problems on the solder side, so I’ll try your suggestions when I put it back together. I wasn’t getting voltage across C and D.
GrantApril 9, 2018 at 2:32 pm in reply to: PCB testing troubles #3241
Just emailed the pictures. I am getting 120 volts at P5. Sorry, I misunderstood your earlier questions.
GrantApril 9, 2018 at 10:00 am in reply to: PCB testing troubles #3238
Thanks. I’ll email a picture to you. It may be hard to see. I am getting 120-ish vac at the IEC jack.April 9, 2018 at 9:30 am in reply to: PCB testing troubles #3236
Thanks, the pad connecting to one of the black wires coming from the power transformer is the one that got fried. I was able to solder the black wire to the board, but I wonder about the connection.
Test point 1 DC voltage: zero volts.
Red and brown wires from power transformer: zero reading.April 9, 2018 at 6:59 am in reply to: PCB testing troubles #3232
I’ll check the troubleshooting thread. I may need to do a bit of PCB repair, because I fried one of the contact pads on edge of the board. I’m sure we’ll figure it out.