Electronics > Repair
NOCO GB70 repair help
AN86:
ZD2 is beeping on continuity test. And on diode test on DMM it said 0.002V. but continuity test is beeping so i guess its bad.
Is there any value specific i need to ask in store?
jerryk:
You cannot test ZD2 in circuit. You have already taken the resistance at C21 which was 3.4 ohms so this will be the same at ZD2. The only way to test ZD2 under current conditions is the remove it. FWIW if ZD2 is shorted when you remove it your jump pack will start working if was the only issue. Once you remove ZD2 if no change in symptoms then check the resistance again across C21 or ZD2 pads and see if it is still 3.4ohms or thereabouts.
Jerry
eurgenca:
Like I told you. Replace ZD2 with 5V1 diode, and if you LUCKY you are good to go, but probably not. Next step is to check douther board if you will have problems with charging. If CPU is bad you are stuck.
AN86:
In my store they dont have zener diode in smd variant,so i did solder this one just to try and i guess its working. I will order smd from the internet and after i solder it ill send if its working on car or not.
eurgenca:
Connect charger and check if consuming current. You still have chance for ghost charging effect.
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