Re: Newbie - Hand Soldering TO-220 SMD - HELP!

Thanks to all, replaced 7 bad diodes and IGBT's in an old Panasonic plasma TV and works perfectly again.

Re: Newbie - Hand Soldering TO-220 SMD - HELP!

For SMD replacement work in general, what's your opinion on using pre-heating plates?

Re: Newbie - Hand Soldering TO-220 SMD - HELP!

The first video was outstanding. Seems very straightforward... for some reason I thought hot air would be less destructive but this video makes it seem pretty fast. thank you for taking the time to help me.

Re: Newbie - Hand Soldering TO-220 SMD - HELP!

OK, will give it a try... the exposed metal tab is line a pretty thin strip, less than 1/16" wide. Few questions please:

1) what temp would you use? I have a Weller 100W iron with 600F, 700F and 800F tips?

2) would you use Chipquick or other low temp solder?

3) how long? Is there someway of knowing when the solder has flowed enough under the SMD?

Many, many thanks

Jerry

Re: Newbie - Hand Soldering TO-220 SMD - HELP!



Sorry if I wasn't clear, the part to solder is not visible/accessible. It is the entire backside of the component which is mounted flat to the PCB - I assume it is constructed so to allow the PCB ground plane act as a large heat sink since these TV diodes (RN1501 or DAF30A) are rated at 20A with 100A surge. Are you saying I should apply the iron tip directly onto the SMD body?

Jerry...

I have a lot of experience with PCB thru-hole repairs but only some SMD replacements such as 0805 parts or SOT-23 transistors where i have tacked the pins to the pads manually with a fine solder tip. I am now replacing several TO-220D-A1 diodes on a TV pcb and all of these need the cathode backside of the component soldered to a large ground pad. I have a XYtronic LF-8800 80W hot air pencil (minimum setting is 300C, max is 450C) and used Chipquick low temp lead free solder paste. I have pre-warmed the SMD with the hot air pencil at 300C held about 1" above the SMD for about 1-2mins then turned...

Re: New Members - please post your introductions here

Greetings ! My name is Jerry, I am a ham radio nut for more than 50 years. I like to repair old vintage radios, aka boatanchors. Now retired, I am expanding my quest for knowledge and I am currently trying to repair an old Panasonic plasma TV on the component level. Lotsd of thru-hole soldering experience but almost zip with SMD and hot air pencils.... learning the hard way :-)