The antenna on my ICF-SW7600gr broke off. I want to solder on a new wire lead. should i only connect to the top solder point, or to all three where the old antenna plate rested?

check the connection inside the radio, switch of AC-DC connector maybe loose contact.( leak diode more probability replace it)

Step 1:
google translated


antenna wire connection on the circuit is cut and I do not know where the weld

antenna wire connection on the circuit is cut and I do not know where the weld

you might need to solder it
You attach wires to printed circuit boards (PCB) in a process called soldering. You heat the wire and PCB pad, melting the solder wire and allowing it to flow onto the wire and pad. The solder wire used is typically a lead-tin alloy although in some special cases, silver is used. Soldering a wire to a printed circuit board may be part of making, repairing or modifying the board or connecting it to another device.

Clean the pad on the circuit board where the wire will be attached. Gently rub the eraser on the pad until it is clean and shiny. Strip about 1/4 inch of insulation from the wire. Tin the end of the soldering iron by melting a small amount of solder onto the iron tip. Heat the wire end with the soldering iron for a few seconds and briefly touch the solder wire to the bare wire, just long enough to melt the solder, and let it flow into the stranded wires. This is called tinning the wire. Tinning the wire is not necessary with solid or single strand wire. Insert the wire end through the hole in the circuit board pad from the top or component side of the board. Bend the end of the wire slightly to prevent the wire from falling out while soldering but do not let the wire end touch any other component lead or another pad on the circuit board. Apply the soldering iron tip to the wire end and solder pad at the same for a few seconds until the solder used to tin the wire end melts. Apply just enough new solder to make a dome-shaped puddle on the pad that covers the hole and the wire. Remove the iron from the pad but do not move the board for a minute. Cool the new soldered joint and do not move the board until the solder hardens. Clip the wire end off with the wire cutters. The wire is permanently attached to the printed circuit board.

Soldering Guide http://www.kpsec.freeuk.com/solder.htm b> b> b> How to Solder to a Circuit Board: Skill Set (with Video)
http://www.popularmechanics.com/cars/news/4213423

I got mine apart by wedging a screwdriver in and twisting until it popped apart. (nothing broke) I started at a bottom corner and worked my way up the side until it came loose
The problem is that the broadcasting antenna at the top of the remote is very a very thin wire wrapped around a heavy cylindrical magnet and its solder points are extremely weak. You most likely dropped it and it came loose. I re-soldered mine and it worked perfectly.... until it broke again. The leads are very small and hard to fix.
Chalk it up to poor design.

Yes it can be fixed if you have patience and know your way around soldering.
FIrst its tough to take apart. I got mine apart by wedging a screwdriver in and twisting until it popped apart. (nothing broke) I started at a bottom corner and worked my way up the side until it came loose
The problem is that the broadcasting antenna at the top of the remote is very a very thin wire wrapped around a heavy cylindrical magnet and its solder points are extremely weak. You most likely dropped it and it came loose. I re-soldered mine and it worked perfectly.... until it broke again. The leads are very small and hard to fix.
Chalk it up to poor design.

The problem is that the broadcasting antenna at the top of the remote is very a very thin wire wrapped around a heavy cylindrical magnet and its solder points are extremely weak. You most likely dropped it and it came loose. I re-soldered mine and it worked perfectly.... until it broke again. The leads are very small and hard to fix.
Chalk it up to poor design.
It is hard to take apart... I got mine apart by wedging a screwdriver in and twisting until it popped apart. (nothing broke) I started at a bottom corner and worked my way up the side until it came loose. It is an easy fix if you know how to solder.

The problem is that the broadcasting antenna at the top of the remote is very a very thin wire wrapped around a heavy cylindrical magnet and its solder points are extremely weak. You most likely dropped it and it came loose. I re-soldered mine and it worked perfectly.... until it broke again. The leads are very small and hard to fix.
Chalk it up to poor design.
It is hard to take apart.... I got mine apart by wedging a screwdriver in and twisting until it popped apart. (nothing broke) I started at a bottom corner and worked my way up the side until it came loose. It is a fairly easy fix if you know how to solder.

Could be a diode or a capacitor. Where are you located?

Click Sony Support to download instruction manual (PDF file) of ICF-SW7600GR

Can You state exactly what the toy is. Maker, Name, model, pictures, year of manufacture. Details help the research process.
But try this...
If talking about a circuit, look where all the solders are, You can sometimes find a solder point that doesn't have a smooth top it will look like something broke off. Find two of these...To tell the difference when you find them which wire goes where, the solder point that traces back to any capacitor ( a cylindrical component with two leads on its bottom that has a black strip down its side noting which lead is negative.) The black wire can be soldered back to the point that traces back to a negative lead. Then the positive (red) will go to the other one.

If this does not help see if you can upload a good quality pic of both sides of the circuit if possible.

My jack plug lead got yanked and broke the wires inside the electronics unit. There are three screws to undo in order to get inside the electronics, one by the cable entry and two very small cross head scvrews in deep holes halfway along the unit. I cut the jack lead on the outside close to the cable entry and drilled out the hole through the cable guide and then poked the jack cable back through the hole into the electronic unit. I was able to solder the three leads to their respective pads. There are five solder pads next to the cable entry. With the cable entry at the top, the middle pad connects to the green cable, the rightmost pad connects to the red cable and the copper connects to a pad about 1 cm down from the rightmost connector. The technique was to tin the ends of the leads with solder before soldering them to the pads. I used a blob of glue from a glue gun to hold the cable in place inside the electronics unit. My plan B if the soldering was not possible was to take a jack plug and lead from an unused set of earpieces and use that lead in place of the original. It would have been much more difficult to replace the lead from the electronics unit to the headset.