RF4 e-Buff 32V 5A Current Analyzer Power Supply

Mobile Repair Power Supply Built for Current-Led Diagnosis

The RF4 e-Buff gives you a mobile repair power supply that shows what a board draws, not only what it receives. It outputs 0–32V at up to 5A, reads voltage and current to 0.001 resolution, and plots current on a live curve. You watch a dead phone’s draw on a pointer gauge, a digital readout and a graph at the same time. That combination suits technicians who diagnose from current behaviour first and reach for the hot air gun second. If your bench already runs a multimeter and a microscope, this unit adds the one view they cannot give you: draw over time.

Pointer, Digital and Curve Display

Two readouts cover two working habits. The pointer gauge gives you the fast glance. Needle movement tells you a board pulls, stalls or jumps before you read a single digit. The digital display gives you the exact figure to 0.001V and 0.001A, so you log one repair and compare it against the next board on your bench.

Curve mode adds the third view. The graph refreshes at a high rate, so it catches small current changes that a slow numeric readout skips. When a phone hangs on logo or runs a boot loop issue, the curve shows you where the draw climbs, drops or repeats. You read the pattern instead of guessing which stage fails.

Adjustable Output and Overload Monitoring

The adjustable output covers 0–32V at up to 5A. One unit handles battery-line tests, charging-line tests and board power-up for phones, tablets and small electronics. The standard 5V/2A output gives you a fixed, repeatable supply for USB-style charging checks. That matters when charging issue jobs fill most of your day. You set the voltage a board needs, connect the output lines and start reading. You stop hunting for a separate adapter for every board that lands on your bench.

Short circuits and overloaded rails show up on a repair bench every week. The e-Buff includes electronic fence monitoring designed to prevent overload, so a faulty board meets a monitored supply instead of an unwatched one. Set your voltage and current limits before you connect a board. Then let the unit track the draw while you probe, jumper lagana points or lift a suspect component.

Where It Fits in Your Repair Workflow

Power the board first and read the draw before you decide anything. A dead phone with no draw sends you down the power path. An abnormally high draw points to a short, which sends you to the multimeter and the microscope. The reading also helps you separate a hardware fault from a software one before you start a box chalana session or software marna job.

After IC change karna work on a hot air station or soldering station, power the board again and compare the draw against your first reading. Technicians who flash, reflow eMMC or UFS chips, or work with ISP pinout tools also watch the curve through those steps. A stable curve tells you the board settles after the work. A dead after flash fault shows up the same way, as a draw that never settles. Keep your PCB holder, test box and reballing kit within reach, since the e-Buff sits at the start and end of almost every board job.

Why Technicians Choose This Tool

Most bench supplies show a number. The e-Buff shows a number, a needle and a graph, which means you confirm a reading three ways without switching instruments. That cuts the back-and-forth between a supply, a meter and your notes. Shops that run several benches get the same readout on every board, so two technicians read one fault the same way.

The box contains the main unit, one power cord and two output lines. That covers a working setup on day one. If your work grows past 5A, step up to a higher-current bench supply and keep this unit on your dedicated phone-diagnosis bench. For Pakistani repair shops that handle daily Android and iPhone board work, the e-Buff gives you current visibility at a specialist level without crowding the bench.