Author Topic: Fluke 1507 Insulation tester - High current draw [ SOLVED ]  (Read 274 times)

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Offline omegaone

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Fluke 1507 Insulation tester - High current draw [ SOLVED ]
« on: October 13, 2018, 07:34:55 pm »
Hi,

With power supply 6V connected rotary switch turned to any position other than off indicates a current draw of 0.9 A.
LCD does not come on, translucent panel lit. Any suggestions would help as cannot find a schematic. 
« Last Edit: October 15, 2018, 04:07:19 am by omegaone »
 

Offline PTR_1275

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Re: Fluke 1507 Insulation tester - High current draw
« Reply #1 on: October 13, 2018, 07:36:02 pm »
Any photos of the PCB both sides?
 

Offline omegaone

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Re: Fluke 1507 Insulation tester - High current draw
« Reply #2 on: October 14, 2018, 02:26:57 pm »
Pictures attached.

Before disassembly, unit completely went blank. (no display)
 

Offline PTR_1275

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Re: Fluke 1507 Insulation tester - High current draw
« Reply #3 on: October 14, 2018, 03:25:28 pm »
Did the meter get wet? The area around the main IC and crystal looks to be corodded (blue tinge and maybe rust)
 

Offline omegaone

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Re: Fluke 1507 Insulation tester - High current draw
« Reply #4 on: October 14, 2018, 10:39:08 pm »
This meter did not get wet, but you are correct about the blue tinge. It was recently shipped for annual calibration, and rejected because of this issue.
The battery compartment sits directly above it, I did notice this on one of the contacts for the AA battery which I cleaned. Truly appreciate your feedback because I  was not careful in looking!  I will do a proper cleaning and post back the results.

Picture of the damage is attached.
 

Offline PTR_1275

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Re: Fluke 1507 Insulation tester - High current draw
« Reply #5 on: October 15, 2018, 01:55:34 am »
I have a few 1507 boards that’s I got in a bulk lot of fluke stuff at work. No idea what was wrong with them for them to be removed from the cases, but some of them look to have been prodded with a soldering iron and others look untouched. I kept them because I couldn’t bring myself to throw them out. All the good parts are already taken, fuses, display etc...

Give the pcb a good clean. iPA and distilled water and then make sure you let it dry thoroughly. Hopefully after giving it a clean the power consumption drops back down to. What it should be.
 
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Offline omegaone

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Re: Fluke 1507 Insulation tester - High current draw
« Reply #6 on: October 15, 2018, 03:54:00 am »
Fully Operational Meter!

Battery leakage discharge residue was neutralized with vinegar  then cleaned with Isopropyl Alcohol and dried.
Battery compartment & contact was cleaned the same.
Unit power consumption normal and fully operational.

Sincere appreciation and Thank you to PTR_1275 for his keen eyes!

« Last Edit: October 15, 2018, 04:16:52 am by omegaone »
 


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