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TK-630H programming troubles
- Thread starter OFD-14-109
- Start date
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In the second, component side, photo you see a diode symbol in the lower right corner. The diode has the anode, plus side to the left. That would be where the external power would go. It may be the same as the one of the +V pads.
OFD-14-109
Member
Ok so I would need to apply 5V there or is that where I would connect the 12V from pin 6 on the mic connector?
There seems to be a voltage regulator right near and connecting to the diode. A better close up may help.
IIRC there is 8 volts on the mic jack used for running the mic element. Not 12 volts. Still should power the RS232 chip via the regulator.
IIRC there is 8 volts on the mic jack used for running the mic element. Not 12 volts. Still should power the RS232 chip via the regulator.
I think that is the problem, trying to power the programming cable's RS232 to TTL chip from the serial port/computer.
My older Kenwood cable has a diode so the 8 volts does not back up into the serial port. If that photo was better one could see IF the power is really coming from one or two RS232 lines from the computer serial port. I can see the diode, just not where it goes.
Most of the serial to TTL chips need more 5 volt current than most serial ports on computers provide. And for me, a bad idea trying to get power from serial lines from the computer to power RS232 Serial to TTL chip in the programming cable. Newer computer Serial ports do not have enough voltage/current to program some radios. Serial port power IS limited by the serial port chip in newer computers.
Just my 2 kopeyka, if you're going to build you own, add a small "power on" LED (and associated resistor) to the output of the 5v regulator so that you'll know if there is a power problem. You could also power it from a 9v batt or an old 5v cell-phone charger if you want.
Good Luck!
Otis
Good Luck!
Otis
OFD-14-109
Member
I will take a better closeup picture of the chip tonight, I still haven’t got the problem fixed yet but I’ve been busy lately and haven’t worked on it much lately.
OFD-14-109
Member
OFD-14-109
Member
Do you have a part number by chance for the diode? I have the regulator just not the diode.
OFD-14-109
Member
Do you mean I will have to correct some of the traces to use a 2 leg diode or to make it work period?
OFD-14-109
Member
Ok I tried to make my own cable still had problems with programming does anyone happen to have a cable they know to work on the tk-*30 series radios I could borrow or purchase. If you would be willing to loan me the cable I would compensate you as well as prepay for shipping.
k9wkj
Member
why not just order one of these for your self
1X KWCA0GCT Programming Cable 4 Kenwood TK-830 TK-880 TK-980 TK-730
mines worked fine for a couple years on tk-830 and tk-863 and tk-941
1X KWCA0GCT Programming Cable 4 Kenwood TK-830 TK-880 TK-980 TK-730
mines worked fine for a couple years on tk-830 and tk-863 and tk-941
They make good cables and the price is good. But you can not repair the R232 to TTL chip because it IS potted.
OFD-14-109
Member
Will this cable work for my 630,730,&830? I’ve never had this much trouble programming a radio but I mainly program Motorola and Vertex radios
OFD-14-109
Member
Ok I ordered one I hope it works it’ll be the 4 cable I’ve been through lol. I like that it is wired for power through the radio instead of the computer so hopefully it’ll work.
OFD-14-109
Member
Wow they sure take a long time to process an order I ordered it on Monday and it still hasn’t shipped.
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