UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Non-working Commodore PET 3016

Mark1960 · 14th Jan 2021, 10:13 pm

Just want to add a warning to be very careful when using a manual solder sucker, they tend to kick when the spring is released and if the soldering iron is touching the pcb and the solder sucker tip kicks the soldering iron, the combination of the heat and shock can damage the pad. Sorry for repeating the warning, just want to make sure you avoid damage to the board.

I would also agree with sirius using the soldering iron from the component side of the board when removing the IC pins with tweezers. This is less likely that you’ll try and pull a pin where the solder is not fully melted on the top side, which could pull the pad.

Then when sucking the solder from the holes work from the solder side of the board. This might just reduce the cumulative effect of heat on the adhesive holding the pads to the board, but also if you do damage a pad its easier to repair a bottom side pad than a top side pad.

14th Jan 2021, 10:13 pm	#117
Mark1960 Octode Join Date: Mar 2020 Location: Kitchener, Ontario, Canada Posts: 1,298	Re: Non-working Commodore PET 3016 Just want to add a warning to be very careful when using a manual solder sucker, they tend to kick when the spring is released and if the soldering iron is touching the pcb and the solder sucker tip kicks the soldering iron, the combination of the heat and shock can damage the pad. Sorry for repeating the warning, just want to make sure you avoid damage to the board. I would also agree with sirius using the soldering iron from the component side of the board when removing the IC pins with tweezers. This is less likely that you’ll try and pull a pin where the solder is not fully melted on the top side, which could pull the pad. Then when sucking the solder from the holes work from the solder side of the board. This might just reduce the cumulative effect of heat on the adhesive holding the pads to the board, but also if you do damage a pad its easier to repair a bottom side pad than a top side pad. Last edited by Mark1960; 14th Jan 2021 at 10:16 pm. Reason: Noted sirius already said to work from top side to remove pins.