My clock/radio was working intermittently with what I thought was a broken wire, where the power cord entered the body. I foolishly didn't keep track of wire colours when I melted the solder connections to remove the power cord. Can anyone help with which way the black and white wires from the power cord are supposed to be re-soldered, please? Is the black on the right or left (on the soldering side)? If I was a guessing man I'd say the rectangular box indicates black on the left because the 1 in the box indicates 'power', right or wrong?
About the pictures: pictures of the same end of the circuit board, front and back. Top pic: GCI 1V0 94V-0 cn301 Bottom pic: SONY P301 ICF-c793 1-716-151-12(2) 1-671-842-12 P7 07 99.02.02 T301

THANKS TO ALL WHO REPLY!

THANKS TO ALL WHO ANSWER!

 

My clock/radio was working intermittently with what I thought was a broken wire, where the power cord entered the body. I foolishly didn't keep track of wire colours when I melted the solder connections to remove the power cord. Can anyone help with which way the black and white wires from the power cord are supposed to be re-soldered, please? Is the black on the right or left (on the soldering side)? If I was a guessing man I'd say the rectangular box indicates black on the left because the 1 in the box indicates 'power', right or wrong?
About the pictures: pictures of the same end of the circuit board, front and back. Top pic: GCI 1V0 94V-0 cn301 Bottom pic: SONY P301 ICF-c793 1-716-151-12(2) 1-671-842-12 P7 07 99.02.02 T301

THANKS TO ALL WHO REPLY!

THANKS TO ALL WHO ANSWER!View attachment 138929 View attachment 138930

Is that a gigantic solder blob pretending to be a booger between 2 pads; bottom left near the connector?

 

Is the power plug polarized?

 

Is that a gigantic solder blob pretending to be a booger between 2 pads; bottom left near the connector?

Yes, that looks like it needs fixing.

 

Is the power plug polarized?

It doesn't matter as it is only feeding a transformer you can connect the wires either way round.

 

Yes, that looks like it needs fixing.

Good idea to clean the "snail trail" of flux where it ran down the board, before giving up and try hoodwinking the warranty department.

 

I guess my answer got deleted with the duplicate post I reported!
Max.

 

Is the power plug polarized?

Thanks for the interest in my problem, dl324. By polarized I think you may mean the plug end? with one blade larger than the other? If thats what you mean then yes, polarized. If its not the plug end you refer to then I don't have enough knowledge to answer.

I guess my answer got deleted with the duplicate post I reported!
Max.

Maxheadroom, you're forgiven! I duplicated the post thinking I would get better visibility with two posts. Looks like it worked

 

Is that a gigantic solder blob pretending to be a booger between 2 pads; bottom left near the connector?

Ian: thanks for the interest in my problem, and yes quite some booger there. Original from the factory I think. Radio has been reassembled and seems to still work fine.

Good idea to clean the "snail trail" of flux where it ran down the board, before giving up and try hoodwinking the warranty department.

Yes, that looks like it needs fixing.

Albert: Thanks for the reply. I think that solder blob is original from the factory and has worked well for 20 years. Radio is together after my power cord fix and seems to be working fine.

 

By polarized I think you may mean the plug end? with one blade larger than the other? If thats what you mean then yes, polarized.

Yes, that's what I meant.

Does the device have an on/off switch?

 

Yes, that's what I meant.

Does the device have an on/off switch?

Yes it does have an on/off switch. Its a clock/radio.

 

There is no switch between the inputs to that board and the transformer primary.
Clock radios don't generally an on/off switch. Why would you want to turn off a clock?

 

There is no switch between the inputs to that board and the transformer primary.
Clock radios don't generally an on/off switch. Why would you want to turn off a clock?

Albert, the radio is switched, an on/off button, but not the clock. Most clock radios have switches for the radio.

 

Albert, the radio is switched, an on/off button, but not the clock. Most clock radios have switches for the radio.

Quite. Which means that there is no mains power switch.

 

Quite. Which means that there is no mains power switch.

Albert, I'd have to agree with you on this, because it just makes sense to me, a carpenter. Thanks again for your interest in solving my problem.

 

Albert, I'd have to agree with you on this, because it just makes sense to me, a carpenter. Thanks again for your interest in solving my problem.

If there is no power switch, then the polarity of line and neutral doesn't matter. With a power switch, the hot wire needs to go to the switch.

 

Can anyone help with which way the black and white wires from the power cord are supposed to be re-soldered, please?

It doesn't matter which way the wires go.

If you had taken the time to completely fill out your user profile, we would know what country you are in and also the line input characteristics. But in this case, it doesn't matter - either way you connect the power it will work. By work, I mean that the voltage will be dropped to the required input to the circuitry - whether or not the circuits are working properly remains to be seen.

 

If there is no power switch, then the polarity of line and neutral doesn't matter. With a power switch, the hot wire needs to go to the switch.

dl324, Thank you!

 

It doesn't matter as it is only feeding a transformer you can connect the wires either way round.

It doesn't matter which way the wires go.

Most likely correct. As long as it's a 2-prong plug. I've never seen a clock radio with a 3-prong plug and a grounded case but that doesn't mean there's not one.

 

Most likely correct. As long as it's a 2-prong plug. I've never seen a clock radio with a 3-prong plug and a grounded case but that doesn't mean there's not one.

slk001, Thanks