Lightwave Halfnote Green Laser Questions

**Laser Ben** · 10-02-2009, 12:59

Yes, exactly, that will work for the timer system.

**smogthemog** · 10-03-2009, 09:33

The 500Hz generator cct is built and connected up as is all the other connections to make it operate according to Ben and Bart

I am getting the 'FAULT' LED lit with the 'TMP FLT' LED lit also on the driver board?
Any ideas please?

**Laser Ben** · 10-03-2009, 10:05

That means that one of the 4 temperatures on the laser/board is not where it should be. I would guess that it is the thermistor that pulgs into JHS1, it should be 10k, I would make sure that is pluged in. Next I would check the PTC device on the main board, it was replaced with a resistor as the stock part was distroyed, and was impossible to find a replacement for. There should be a resistor there, make sure it is connected to the board.

Check page 69 in the manual for a flowchart on diagnosing it.

**smogthemog** · 10-03-2009, 10:10

OK, sorry, didn't get back here in time.
Thanks for the reply Ben.

I cured that and it was the resistor you mentioned come adrift.

Now when I reset the system, LED1 (PS) lights and so does LED11 (TEC) - I get a flash of green light a second or so later and then the Fault LED lights along with V-FLT LED4 (page 68) which is the diode voltage too high.
I am running the PSU at 230V remember and not 110v as you would have been - could this make a difference? It shouldn't I know but.....

**smogthemog** · 10-03-2009, 10:15

Its working

I turned down the 1K pot I has controlling the voltage to pin8 and it struck up

**dar303** · 10-03-2009, 11:00

Congrats, good work! How much power does it output?

**Laser Ben** · 10-03-2009, 11:07

Originally Posted by smogthemog

Its working

I turned down the 1K pot I has controlling the voltage to pin8 and it struck up

22A is quite low, that is only 5-6A above threshold. I would step it up to 30A and you should get rated power.

**smogthemog** · 10-03-2009, 11:12

It's pegging my Lasercheck (1W) and that is the only power meter I have so I don't truly know for sure.
It makes a mess of the cardboard box it was aimed at

**smogthemog** · 10-03-2009, 11:47

Originally Posted by Laser Ben

22A is quite low, that is only 5-6A above threshold. I would step it up to 30A and you should get rated power.

It wont go over 26A Ben without tripping out.
I have wound up the current monitoring pot to allow full threshold but when I bring the current pot, the one I added controlling the 0-5v on Pin 8, up it reaches 26A and then trips. It won't let me take it any higher?

Any clues as to why this is doing this please?

**Laser Ben** · 10-03-2009, 11:57

The issue is the supply voltage. It should be exactly 3.3V +-0.05V. If not, it will trip the fault light. I would guess this is because of the change in input voltage. Can you power it with 120V?

'
Check page 68 in the manual.

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