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View Full Version : Can anyone tell me how to disable the strobe light?


allthingsanalogue
16-04-2015, 04:39
I'be been looking but can't find how to disable the strobe on the 1210.

Is it the brown wire on the bottom of the board on the 7 pin connector?

Thank you.
CageyH
16-04-2015, 05:34
If you have fitted the external PSU by connecting the positive power on the resistor near to where the regulator used to be, the negative on the earth terminal and spliced in the blue and brown original power wires to the brown wire at the bottom of the deck, the power switch now becomes the strobe disable switch.

If my instructions are unclear, have a look at the fitting an external PSU thread. It's all detailed in there.

Thinking about it, it does seem like the brown wire at the bottom of the board is the strobe power feed. I would need to check before I could commit 100%.
allthingsanalogue
16-04-2015, 07:45
I fit the positive here, there was no resistor just a link wire there.

http://i39.tinypic.com/2h6umtf.jpg

What yon are saying makes sense, at the moment the power switch is not connected to anything. Still thinking if to disable the strobe or not, I do like it and with the psu upgrade I'm not sure I'll notice much difference with it off.

It would mean however I could leave the SR3 switched on all the time like the rest of my kit without worry of damage to the LED's in the strobe lamp (although It's unusual for them type of LED's to burn out).
aniki
16-04-2015, 08:01
If you remove the power switch / speed switch assembly you will see that the strobe LEDs are attached to a tiny separate pcb. This is connected to the main switch PCB by two wires (Black & Red).
Could you not just desolder these from the main PCB?
I assume that everthing would still work as it does now but simply remove the lights from the equation...
allthingsanalogue
16-04-2015, 08:27
If you remove the power switch / speed switch assembly you will see that the strobe LEDs are attached to a tiny separate pcb. This is connected to the main switch PCB by two wires (Black & Red).
Could you not just desolder these from the main PCB?
I assume that everthing would still work as it does now but simply remove the lights from the equation...

I think that option just turns of the leds for the strobe lamp but the strobe circuit is still operating.
aniki
16-04-2015, 09:21
I think that option just turns of the leds for the strobe lamp but the strobe circuit is still operating.

Correct; but I follow the school of thought that while the LEDs may emit RFI that may have an effect on a poorly shielded cartridge, the effect of the strobe circuit on the power supply itself is not audible.
aniki
18-04-2015, 13:15
I think that option just turns of the leds for the strobe lamp but the strobe circuit is still operating.

Apologies Andrew. My recollection was incorrect; I didn't actually de-solder anything. I just removed the two cables (brown and red) from the multi-connector.
I'm no electronics engineer but in theory if the lamp is disabled by merit of the fact that the cables are disconnected, does this not mean that if the circuit is now incomplete the strobe element cannot operate?

http://img.photobucket.com/albums/v236/aniki666/74A33B0D-DD15-4FCC-999A-F9808D99DCBA.jpg
Andrei
18-04-2015, 21:17
Consider this from KAB-USA https://www.kabusa.com/frameset.htm?/1200bld.htm
allthingsanalogue
19-04-2015, 20:03
Apologies Andrew. My recollection was incorrect; I didn't actually de-solder anything. I just removed the two cables (brown and red) from the multi-connector.
I'm no electronics engineer but in theory if the lamp is disabled by merit of the fact that the cables are disconnected, does this not mean that if the circuit is now incomplete the strobe element cannot operate?

http://img.photobucket.com/albums/v236/aniki666/74A33B0D-DD15-4FCC-999A-F9808D99DCBA.jpg

I think you are right!

I can just splice the brown wire through the main power switch and the leave the red connected.

Did you notice much difference with it off?
CageyH
19-04-2015, 20:06
I had it wired up on the switch. I can't say I ever noticed a difference with them on or off.
aniki
19-04-2015, 20:40
Did you notice much difference with it off?

I run my deck without any lights at all (bar the speed button LEDs). Does it make a difference? Maybe; but I can't say I noticed to be honest.
keiron99
23-04-2015, 07:54
I run my deck without any lights at all (bar the speed button LEDs). Does it make a difference? Maybe; but I can't say I noticed to be honest.

I couldn't live without the cueing light. Every turntable should have one!
keiron99
23-04-2015, 07:55
By the way, Serge on the WigWam (can I mention that place?) recently posted that strobe is driven by the same oscillator that drives the turntable, which means that if the oscillator is slow, the turntable will run slow, but so will the strobe, so showing the correct speed. Makes it a bit of a nonsense, really!
allthingsanalogue
24-04-2015, 20:28
Well I wired the brown wire into the switch tonight and I can now switch the strobe on and off!
allthingsanalogue
24-04-2015, 20:29
By the way, Serge on the WigWam (can I mention that place?) recently posted that strobe is driven by the same oscillator that drives the turntable, which means that if the oscillator is slow, the turntable will run slow, but so will the strobe, so showing the correct speed. Makes it a bit of a nonsense, really!

I would be surprised if the oscillator would slow down, either work or it won't I reckon.