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Backlight Tester.

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zomikula:
Got one of these last year
Saves alot of time to be honest.

vinceroger69:

--- Quote from: Turnip on March 16, 2017,11:50:42 ---Hi folks,

Got one recently, only £16.00 inc post. User guide was in Chinese, so thought check it out.

Noticed little in the way of Mains isolation, but guess not a problem.

Seems it does everything required, also has a nifty insulation tester that bleeps 'Leak' when using an Avo 8 on the 300 volt range, even when set on a pretty low output - Guess some sensitivity - Chris.

--- End quote ---

with this tester do you have to alter the voltage manually? to left knob or do these increase the voltage slowly like a soft start and ramp the voltage up slowly and what is the switch for below the knob?

Turnip:
Hi Vince,

4 position switch is for max current (as noted)  Potentiometer controls voltage from 7.5v to max but as limited by max current, seems no chance of damaging Leds.

Seems OK so far - Don't know how it compares with the more expensive version, but it shows current also a leak test at a fairly high voltage as strips can well burn a bit -  Haven't yet checked how many megohms it can suss at near 200v - But guess a useful option - Chris.

vinceroger69:

--- Quote from: Turnip on April 01, 2017,12:35:37 ---Hi Vince,

4 position switch is for max current (as noted)  Potentiometer controls voltage from 7.5v to max but as limited by max current, seems no chance of damaging Leds.

Seems OK so far - Don't know how it compares with the more expensive version, but it shows current also a leak test at a fairly high voltage as strips can well burn a bit -  Haven't yet checked how many megohms it can suss at near 200v - But guess a useful option - Chris.

--- End quote ---
im in two minds the one you have or this one goes up too 300v
https://www.hklrf.com/0-300V-Smart-Fit-Voltage-All-Size-LED-LCD-TV-Laptop-Backlight-Tester-Tool-Lamp-Beads-Test-Detect-Repair_1948.html
its just under £22.00 delivered to the uk

Turnip:
Hi Vince,

That was the other option I referred to, but as I haven't bought one, can't give an opinion.

Mind you, your preference suggests good mains isolation, where the cheaper one might be suspect as noticed no transformer inside when I lengthened the supplied short mains lead to reach the power socket.

Guess they both do much the same thing - The cheapy has a leakage check which could be useful in the case of a string burnup - But there again, it should be obvious - Chris.

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