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HH Pulse wire came loose. Where does it go?

tvr

Well-known member
HH pulse quit last week. Made a lot of noise then went silent. I opened it up and there is a yellow wire coming from the coil connector that is hanging loose. I looked for places that might look like it was connected and I am not seeing things that looked soldered that not longer are. Any help is much appreciated. I am cross posting this in the both the beach and technology forums. If I get an answer in one, no need to post in the other. Thanks!
HHPulseWire.jpg
 
Had circuit board pictures at one point. PM me or post a large picture of the top of the circuit board. I may then remember where it goes.
 
The red and white wires (partly hidden by the capacitor) go into feed thru holes marked "coil". The red, white and yellow wires come from the coil connector. I don't see another place on the board that looks like a place that was soldered that is missing something. All the thru holes have something soldered in except the one marked test point (TP 0).
 

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just a guess..
 

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There's 3 wires coming off a mono coil.
Start of the coil wire, end of coil wire and shield wire.
Guessing from what I see, if you have a multi meter, see if you have continuity between the red and yellow wire and red and white wire. The ones that do will be the start and end wire.
The last wire is the shield wire which goes to ground. So the yellow wire probably goes to ground. Look for another solder pad under the circuit board near the white wire that connects to the white solder pad.

When I build my coil, see picture. White wire is the coil bundle wires start and end, Yellow wire is attached to the shield-copper tape. One white coil wire is connected with the shield yellow wire, which can be done at the circuit board or within the coil
 

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"There's 3 wires coming off a mono coil. Start of the coil wire, end of coil wire and shield wire." ... " shield wire which goes to ground"
That is what I was thinking. The battery wires (from the other side of the headphones) come into one of the pots then to the + - on the circuit board. I'll tack the yellow to the negative at the pot and see what happens.

Thanks! I needed the verification that the third wire was a shield and not some center tap that I saw nowhere to put.
 
Frustration! Ohmed it out through the battery terminal to the pot with the on/off switch, ready to connect it and ... I can find my soldering gun, but not either my 15 watt iron (the perfect tool for this) or my 25 watt iron. I'm not going in there with the gun as I'm very likely to melt about 4 wires and who knows what other damage the massive heat of the gun may do. Going to walk away for now and on the next trip to run errands will pick up a cheap iron.
 
Wire connected to point that ohms out as ground for the circuit card and negative on one of the two 9V battery terminals (they are wired in series, so circuit must run on around 18 volts. Put batteries in and turn it on ... nothing; then notice batteries are getting hot, fast. This detector may have seen it's last use.
Thanks for the help Sven and OBN; at least we tried.
 
TVR :
Did you ever figure out where the wire went. I have two HH Pulse machines. I can open them up and send you a picture of where the wires go .
Jeff
 
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There's 3 wires coming off a mono coil.
Start of the coil wire, end of coil wire and shield wire.
Guessing from what I see, if you have a multi meter, see if you have continuity between the red and yellow wire and red and white wire. The ones that do will be the start and end wire.
The last wire is the shield wire which goes to ground. So the yellow wire probably goes to ground. Look for another solder pad under the circuit board near the white wire that connects to the white solder pad.

When I build my coil, see picture. White wire is the coil bundle wires start and end, Yellow wire is attached to the shield-copper tape. One white coil wire is connected with the shield yellow wire, which can be done at the circuit board or within the coil
Sven,
When I pulled the connector apart that goes into the headset, I saw that the cable coil is a coax/ Both the yellow and the white wire was soldered to the shield. The red wire as well as the white wire (center conductor and shield) went to the circuit board where the board has two contact pads labeled coil.

What I don't know yet is if the other wire (yellow) is supposed to go to ground (battery negative) or somewhere else.
 
TVR :
Did you ever figure out where the wire went. I have two HH Pulse machines. I can open them up and send you a picture of where the wires go .
Jeff
That would be much appreciated. Am particularly interested in where the third wire from the coil wire goes. Two go to the circuit card where the card says coil; but the third wire is the one I'm not sure about.
 
I have a Headhunter Diver (Yellow model) and one of the 2 green wires came loose in mine and I soldered it on to other green wire on the sensitivity pot and now I get no signal at all.
Does anyone have a picture or diagram where this wire might go?
 
I have a Headhunter Diver (Yellow model) and one of the 2 green wires came loose in mine and I soldered it on to other green wire on the sensitivity pot and now I get no signal at all.
Does anyone have a picture or diagram where this wire might go?
 

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