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Hi, I'm still new here. I'm going to try limiting the questions on this to just this side project. I'm still waiting on a lens assembly shipping from Hong Kong, so the laser diode project is on hold
I have a HeNe tube(NEC GLT 165) complete with it's original PSU & power transformer, all of which I removed from an antique laser video disk player. It was years ago when I put all these parts in a box and I don't remember writing any notes on which wires go to what, so a small challenge here. Also, I think the transformer might've 'bumped' the PSU circuit board, as it's cracked right down the middle! Just a little soldering is all it needs
Please don't ask if the tube is cracked:bowdown:
The PSU board has pins numbered 1~13. After spending several days searching LPF & Google, I found the best info on Sam's laser FAQ's. There, a list of some Pioneer schematics showing PSU connections look very promising, but nothing matched-up exactly.
Pins 1 & 2 on my PSU & on the Sam's site are the same, power from transformer to PSU. On what I have, these two were and still are connected.
Pins 4 & 5 AC mains in. What I have is a short piece of lamp cord with the indentation from a strain relief. This looks like where the wall outlet is connected, & Sam's schematics agree on the pin numbering.
Tracing pins 4 & 5 on the PSU board shows that the AC mains input is completely isolated from the rest of the board. After running through a fuse and a filter section, outputs on pins 8 & 9. Pin 9 has a wire that is tied to another wire that is connected to pin 6. I believe I tied these two wires together, and that they went to the main power switch. Sam's schematics agree with that, only one small problem is that pin 6 does not go anywhere and no other wires are currently connected to this pin. So I'm assuming a wire came loose from here while in the box.
Good news is that pin 8 is connected to the input side of the transformer.
The transformer is a multi-voltage input type, that is - there's a selector switch to plug into one of four mains voltages. 110, 120, 220 & 240. There's also another fuse block wired inline with the selector switch. This makes three fuses total for the entire system I have here. I temporarily cut the selector switch wiring and tested all positions. There's one wire on the switch that is not connected to anything, but it gets connected to one each of all the other wires depending on which position the switch is in. So I'm guessing this should be connected to pin 6 on the PSU?
Pins 3 & 7 are not used. Pin 13 is one of the wires to the laser tube, the other wire of which goes directly to the flyback.
Now for what I had thought were the real issues here. Pins 10, 11 & 12. The Sam's schematics were only partially helpful as they don't cover this exact model, but as they all agree with each other on pin usages as well as with my PSU, then I'm hoping that these next few assumptions may hold true for all of these PSU's.
Pin 10 is shown on the schematics as a ground. On mine, there's a black wire connected to that.
Pin 11 is shown being connected to an interlock switch on all schematics, with the PR 8210 schematic also stating that this is connected to 12 volts positive. The PR 8210 also shows that the interlock is bypassing a resistor that has '270' written next to it. Maybe 270 ohms? So the voltage to pin 11 drops when the interlock switch is flipped. But for my purposes, I don't need an interlock and am assuming that I can connect +12 volts to pin 11. I'm thinking of using a separate wall wart for this instead of messing around with the other outputs on the transformer. It has five wires taped-off. On my PSU there's a purple wire on pin 11, going nowhere special
On Sam's, another page to do with setting-up a new tube, as part of an alignment procedure - there's a reference made to 'shorting pin 12 to ground' using a jumper so as to get the PSU to stay on with the disk player opened-up. I'm thinking this was in reference to all of the Pioneer players, and maybe will also hold true for my PSU. The schematics show this wired to a 'lid switch', then to another module. On my PSU, there's a red wire with a position sensing mechanical switch at the other end. So I'm thinking of connecting this to pin 10, and also connecting the 12 volt negative to this pin.
I'll also wire-in a power switch between pin 9 & the selector switch. But I thought I'd wait on all of this until I should get any feedback from this forum. Hopefully, I made this clear enough that not too many questions need be asked about what I'm doing here...:thanks:
I have a HeNe tube(NEC GLT 165) complete with it's original PSU & power transformer, all of which I removed from an antique laser video disk player. It was years ago when I put all these parts in a box and I don't remember writing any notes on which wires go to what, so a small challenge here. Also, I think the transformer might've 'bumped' the PSU circuit board, as it's cracked right down the middle! Just a little soldering is all it needs
Please don't ask if the tube is cracked:bowdown:
The PSU board has pins numbered 1~13. After spending several days searching LPF & Google, I found the best info on Sam's laser FAQ's. There, a list of some Pioneer schematics showing PSU connections look very promising, but nothing matched-up exactly.
Pins 1 & 2 on my PSU & on the Sam's site are the same, power from transformer to PSU. On what I have, these two were and still are connected.
Pins 4 & 5 AC mains in. What I have is a short piece of lamp cord with the indentation from a strain relief. This looks like where the wall outlet is connected, & Sam's schematics agree on the pin numbering.
Tracing pins 4 & 5 on the PSU board shows that the AC mains input is completely isolated from the rest of the board. After running through a fuse and a filter section, outputs on pins 8 & 9. Pin 9 has a wire that is tied to another wire that is connected to pin 6. I believe I tied these two wires together, and that they went to the main power switch. Sam's schematics agree with that, only one small problem is that pin 6 does not go anywhere and no other wires are currently connected to this pin. So I'm assuming a wire came loose from here while in the box.
Good news is that pin 8 is connected to the input side of the transformer.
The transformer is a multi-voltage input type, that is - there's a selector switch to plug into one of four mains voltages. 110, 120, 220 & 240. There's also another fuse block wired inline with the selector switch. This makes three fuses total for the entire system I have here. I temporarily cut the selector switch wiring and tested all positions. There's one wire on the switch that is not connected to anything, but it gets connected to one each of all the other wires depending on which position the switch is in. So I'm guessing this should be connected to pin 6 on the PSU?
Pins 3 & 7 are not used. Pin 13 is one of the wires to the laser tube, the other wire of which goes directly to the flyback.
Now for what I had thought were the real issues here. Pins 10, 11 & 12. The Sam's schematics were only partially helpful as they don't cover this exact model, but as they all agree with each other on pin usages as well as with my PSU, then I'm hoping that these next few assumptions may hold true for all of these PSU's.
Pin 10 is shown on the schematics as a ground. On mine, there's a black wire connected to that.
Pin 11 is shown being connected to an interlock switch on all schematics, with the PR 8210 schematic also stating that this is connected to 12 volts positive. The PR 8210 also shows that the interlock is bypassing a resistor that has '270' written next to it. Maybe 270 ohms? So the voltage to pin 11 drops when the interlock switch is flipped. But for my purposes, I don't need an interlock and am assuming that I can connect +12 volts to pin 11. I'm thinking of using a separate wall wart for this instead of messing around with the other outputs on the transformer. It has five wires taped-off. On my PSU there's a purple wire on pin 11, going nowhere special
On Sam's, another page to do with setting-up a new tube, as part of an alignment procedure - there's a reference made to 'shorting pin 12 to ground' using a jumper so as to get the PSU to stay on with the disk player opened-up. I'm thinking this was in reference to all of the Pioneer players, and maybe will also hold true for my PSU. The schematics show this wired to a 'lid switch', then to another module. On my PSU, there's a red wire with a position sensing mechanical switch at the other end. So I'm thinking of connecting this to pin 10, and also connecting the 12 volt negative to this pin.
I'll also wire-in a power switch between pin 9 & the selector switch. But I thought I'd wait on all of this until I should get any feedback from this forum. Hopefully, I made this clear enough that not too many questions need be asked about what I'm doing here...:thanks: