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JBC 2010 cartridge availability?
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74HC04:

--- Quote from: leFonque on April 25, 2022, 03:28:10 pm ---Hi everyone,

Last week i've found and bought an old jbc ad 2000 soldering station. I've tried to use a T245 type handle, i've had the same problem as mentioned above, at 350 degrees (C) setting tip temperature was only about 200 degrees.

I've opened it up, checked the pcb, i've found out that the controller chip was actually a 28 pin pic mcu.

When i followed the the track from positive thermocouple pin of the handle on pcb, i've found the thermocouple amplifier (op07) The positive feedback resistor (at the left) of it was 1M Ohm. Amplified output was connected to one of pic mcu's adc channels.

I've attached a k-type temperature tester to tip of the iron, powered the station, at max setting tip temp was 190 degrees (C), TC amp->pic adc input voltage was 4,5V Dc.

I've paralled the feedback resistor with 1Meg resistor. With new feedback ratio, at maximum setting  tip temperature was 350 degrees.

That was my quick and painless solution, i hope if someone  still (or will) have the same problem uses it.

 

--- End quote ---

Thank you very much indeed leFonque! Despite now owning a CD-2BQF, I  still use my AD 2000 for most day-to-day soldering tasks and have recently damaged my 2010-001 tip (yes, the one I mentioned 8 years ago... It hasn't had much use by me until last year).

I'd love to try a T210 with this station... So the only modification reuired to make the T245 work was the change of feedback resistor to 500k, right?

Thank you.
leFonque:

--- Quote from: 74HC04 on April 25, 2022, 08:26:24 pm ---
--- Quote from: leFonque on April 25, 2022, 03:28:10 pm ---Hi everyone,

Last week i've found and bought an old jbc ad 2000 soldering station. I've tried to use a T245 type handle, i've had the same problem as mentioned above, at 350 degrees (C) setting tip temperature was only about 200 degrees.

I've opened it up, checked the pcb, i've found out that the controller chip was actually a 28 pin pic mcu.

When i followed the the track from positive thermocouple pin of the handle on pcb, i've found the thermocouple amplifier (op07) The positive feedback resistor (at the left) of it was 1M Ohm. Amplified output was connected to one of pic mcu's adc channels.

I've attached a k-type temperature tester to tip of the iron, powered the station, at max setting tip temp was 190 degrees (C), TC amp->pic adc input voltage was 4,5V Dc.

I've paralled the feedback resistor with 1Meg resistor. With new feedback ratio, at maximum setting  tip temperature was 350 degrees.

That was my quick and painless solution, i hope if someone  still (or will) have the same problem uses it.

 

--- End quote ---

Thank you very much indeed leFonque! Despite now owning a CD-2BQF, I  still use my AD 2000 for most day-to-day soldering tasks and have recently damaged my 2010-001 tip (yes, the one I mentioned 8 years ago... It hasn't had much use by me until last year).

I'd love to try a T210 with this station... So the only modification reuired to make the T245 work was the change of feedback resistor to 500R, right?

Thank you.

--- End quote ---

You're welcome Sir. I hope you'll try and succeed. At the attached image you may see the temp. measurement. The tip is genuine Jbc c245-903, handle is a cheap one from China which i bought online, it has the basic 3 cable connection.
I think t210 tips' thermocouple response won't be totally different from t245s, maybe you'll have to try some minor resistance value changes, so it's alright to give it a try.

My regards
 
74HC04:
Excellent work! Thanks again  :) 
tittu82:
Wow! Founded this very old topic, yesterday I tried the parallel resistor, it worked for me with a 560kohm resistor!!!! I put a switch so I can use both old and new handpieces!!! I love my AD 2000, it is simply the best! P.S. I also own the new JBC devices.
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