Analyse Method Repair Laptop Motherboard

The most effective method of searching for problems on

motherboard laptops is the method of measuring Voltage (Voltage),

Current (Current), signal (frequency). Inside the schema the

motherboard manufacturer has provided the Voltage Rail detail (the

voltage voltage that should be there) for the motherboard to

function properly. The task of the technician is to find out if there is

an above measuring subject missing (missing voltage and signal ).

Requirements for

motherboard life

require voltage 19V,

5V and 3V_ALW.

The measurement

point indicates that

19V is present with

the arrival of 19V

from VIN to + B

with source battery fet point, VIN for Charger IC and DC / DC IC.

Also ensure Upper N chanel source for 3V and 5V is present 19V

so it is ready at Triger by dc / dc ic and pass the 3V and 5V

voltages. The 3V and 5V measurements already present can be

measured on Inductor 3V and 5V respectively.

Measurements 3V and 5V at other point not mean 3V and 5V_ALW

are already present. VREG3 and VREG5 are not meant to mean

3V and 5V as requirements for life are available. Similar to facing

Short Motherboards, we only find the new availability short 19V, 5V

and 3V checked. How to quickly find short it must use a PSU, This

can save a lot of time in the search for short components. It is

important to know that before doing voltage inject or enter the

voltage we must know the direction of voltage and signal, voltage

line and most importantly is the voltage magnitude. As mentioned

above there is 19V, 5V And 3V on circuit power (VALW). An

injection error / insert voltage can be fatal to a componen2 which

has a maximal capacity under the voltage supplied. Unfortunately

again if the error enter / As described above there is a path 19V, 5V

and 3V on circuit power (VALW). An injection error / insert voltage

can be fatal to a componen2 which has a maximal capacity under

the voltage supplied. Unfortunately again if the error enter / As

described above there is a path 19V, 5V and 3V on circuit power

(VALW). An injection error / insert voltage can be fatal to a

componen2 which has a maximal capacity under the voltage

supplied. Unfortunately again if the error enter /

Inject the voltage on the VS (Voltage on switch) line where there is

a path of 0.75VTT, 1.5VCCORE, 1.05VFGX, 1.2VCCP where this

line only has a maximal 2.5V.jika injection exceeds the maximum

voltage capacity then some components on the line will be

damaged even burned And can cause damage to the circuit

conductor to exacerbate the damage that already exists.