Electronics > Repair
Metcal stss-002 / RFG-30 soldering station repair
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jonpaul:
Usual chi com junk.

buy genuine Metcal

We designed SP-200 500 kHz in 1990s

Used on epay ~$100

j

kirill_maker:
Ok:

Checked all transistors - ok, but need to check Q4 (aka IRF130 in my variant) on curve tracer - just for case.
Checked power resistors - ok.
Checked caps - ok, but replaced with fresh one (just in case).

To do:

Check 74hc06 for signal generation.

Re-checked cable - resistance with connected tip 12 Ohm, capacitance of disconnected cable with disconnected nozzle on 10KHz is ~200pF
kirill_maker:
Wad? It's made in USA even with inch style screws...
macboy:
Maybe j forgot Metcal also makes 13MHz stations in addition to the later 500kHz ones he designed. Both types are excellent.
In any case, yours appears to be a genuine metcal. I hope you can get it working, it will be worth the effort.
The cable needs more than just continuity. It has an inductor and capacitor near the connector at the tip end (not station end). Some people have found that one or both of these can go bad, causing the handle/cable to not longer work. The best method of troubleshooting is to have a known good power supply to test the handle you have, and a known good handle to test your power supply. Otherwise you can't know which one is bad (or maybe both).
kirill_maker:
Unfortunately its first and only metcal that I have around. Is there way to examine cable with signal generator and fft analyzer? I dont have vna - yet , but maybe if i will crank up 13.56 mhz to cable i should see signal power drop ?
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