mac plus power/sweep board

[max¥¥]

i have a mac plus with screen problems, as i understand the problem is a cracked solder joint, but i was wondering if the solder joint is on the power/sweep or on the logic board

 

[macquariumguy]

Definitely the power/analog board, but it's likely the problem isn't so simple as that. That board was under-engineered in several ways, I replaced hundreds of them back in the day.

 

[MacTech68]

Definitely the power/analog board, but it's likely the problem isn't so simple as that. That board was under-engineered in several ways, I replaced hundreds of them back in the day.

Yup, it sure was, I remember the mud-slinging! 😱

But it won't hurt to try running a soldering iron over the LOPT, Yoke connector and Power/sweep to motherboard connector. the last one has a trick where the second last pin on one end is skipped - I saw a few where the last pin (after the skipped one) was missed. 😉
________
buy extreme q

 

[max¥¥]

yeah i took it to a tv repair shop and the guy replaced a voltage regulator witch sorted the problem for a month or so, then when it stopped working i assumed it was a cracked solder joint

 

[max¥¥]

can i get to the power/sweep board to solder the joints without removing it (i don't like the idea of scraping a screwdriver under the anode cap to discharge it)

 

[MacTech68]

can i get to the power/sweep board to solder the joints without removing it (i don't like the idea of scraping a screwdriver under the anode cap to discharge it)

Yes, just make sure it's been switched off for 20 minutes and unplugged from the mains. It's not "recommended" but for re-soldering the video connectors, you can get away with it.
________
Rehab Forum

 

[max¥¥]

Yes, just make sure it's been switched off for 20 minutes and unplugged from the mains. It's not "recommended" but for re-soldering the video connectors, you can get away with it.

it's been switched off for a year, so it should be fine, and i shall try soldering it after school🙂

 

[MacTech68]

I should mention that there is a solder joint you may miss.

The motherboard/logic board connector has a pin that is skipped just before the last pin on one end. Make sure you don't miss the one after the skipped one. It's the multi-coloured cable, single row, in-line that is soldered horizontally and goes to the motherboard.

🙂
________
Suzuki G engine

 

[max¥¥]

ok i will have to wait till the weekend as i can't find the long screwdriver so i need to get a new one