Diagnostic & Test Tools
DC Power Supplies
Regulated DC bench power supplies and current meters for powering and diagnosing phone and tablet motherboards, from SUNSHINE, SUGON, AIFEN, LUOWEI and 2UUL.
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Buying guide
How to choose a DC power supply
Voltage and current range. Model numbers often state it – a "3005" supply delivers up to 30 V and 5 A, a "1505" up to 15 V and 5 A. Phones need much less, but headroom helps for laptops and short-killing.
Current display. A precise ammeter (mA resolution) shows the boot current pattern; some smart supplies plot current curves.
Short killing. Higher-current supplies can be used to burn out shorted capacitors – use with care.
FAQ
Why use a DC power supply for phone repair?
It powers the board without a battery and shows the current draw, which reveals shorts, boot problems and charging faults.
What do the numbers 3005 or 1505 mean?
They describe the maximum output: 3005 = 30 V / 5 A, 1505 = 15 V / 5 A, and 3010 = 30 V / 10 A.
What is a USB ampere meter used for?
It shows charging voltage and current between charger and phone, to check if a phone charges or fast-charges correctly.
