Pathak Technologies

Important test steps when repairing


1. Power Source Test:
- Most mains do not need CPUs (except for some INTELs that require a new CPU
).

- If the source is not tested try to remove the 12V (4pin) jack if you can, then the problem is
100% in the VRM circuit is short. - Squeeze: If the fault is just an island mosfet or something light, press squeeze will run normally.
Pressure
or not hit, then hit hard. - Measure 5V (or 2v5 -> 5V) at PS-ON battery.
If lost: Battery Detector PS-ON -> Chip NAM or
SIO. That guy beat that guy. (If the test chip, the source NAM and instead try quartz
chips anymore offline)
- Detect mosfet island (or IC Island): Green foot -> (last) island port (or direct) -> SIO; Dam
gates or SIO island.

Major damage: dead island mosfet, SIO error, NAM chip error.

2. Clock pulse:

- Run as soon as you click on the source without needing to plug in the CPU, check the clk and fix immediately step 2. Usually just cough, change quartz and replace IC clock is all.

3. Check the source levels:
- Vcore; VRM circuit

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For understanding laptop schematic you must know abbreviation and short form name of the motherboard components. And it is kind of dictionary for technicians, so these are necessary for better understanding electronic data.

Hope it’s useful for you!
AC: Alternating current
ACDRV: AC adapter to system-switch driver output
ACEDET: Adaptor Current Detector
ACGOOD: Valid adapter active-low detect logic open-drain output
ACLN: Adaptor Current sensor Input
ACN: Adapter current sensor resistor
ACOP: Input Over-Power Protection
ACOV: Input Overvoltage Protection
ACP: Adapter current sense resistor, positive input.
ADP+: Adapter Positive Supply
ADP_ID: Adapter Identity
AGND: Analog Ground
ALWP: ALWAYS POWER ON
B+: AC OR BAT POWER RAIL FOR POWER CIRCUIT
BATT: Battery
BAT+: BAT POWER RAIL FOR POWER CIRCUIT
BAT_DRV: Bat Fe Gate Driver
BAT_V: Battery Voltage
BOM: BILL OF MATERIAL MANAGEMENT
BT: BUTTON
BT-EN: Bluetooth Enable
BUZER: Connected
BYP: Bay pass
CHGEN: Charge enables active-low logic input
CIN: Input Capacitor
CLK_EN: CLKOCK ENABLE
CN: CONECTOR
CRT: Cathode ray tube
CSIN: Current Sensor input Negative
CSIP: Current Sensor input Positive
DC: Direct current
DM: DIM DIM SOCKET SOKET MEMORY SOKET DDR
DOCK: DOCKING SOCKET
EC: Embedded Controller
EC_ON: Embedded Controller Enable
EMI: Electromagnetic Interference (GANGGUAN ELEKTROMAGNETIK)
EN: ENABLE
ENTRIP: Enable Terminal
F: FUSE
FSEL: Frequency Select Input
GATE: Trigger gate
GND: Ground
GP: GROUND PIN.
GPI: General Power Input
GPIO: General Power Input Output
HDMI: High-Definition Multimedia Interface
ID: Continuous Drain Current
IDM: Pulsed Drain Current
ILN: Operating Supply Current
ILN (SHDN): Shutdown Supply Current
ILN (STBY) : Standby Supply Current
IS: Continuous Source Current (Diode Conduction)
IVIN: Battery Supply Current at VIN pin
JP: JUMPER POINT
KBC: Keyboard Controller
UVLO: Input Under voltage Lock Out
LC DV: LCD POWER
V: RAIL (POWER)
LDO: Linear Driver Output
V+: Positive Voltage
LGATE: Lower-side MOSF ET gate signal
VADJ: Output regulation voltage
LPC: Low Pin Count
VALW: ALWAYS ON POWER
LVDS: Low-voltage differential signalling (SYSTEM VALWP VALW PAD PENSIGNALAN)
VBAT: BATTERY POWER
MBAT: MAIN BATTERY
VCCP: power chip (ich graphic chips)
NB: North Bridge
VCORE: POWER PROCESOR
ODD: OUTPUT DISC DRIVE
VDD: Control power supply
PCI: Peripheral Component Interconnect
VDDR: VDS DOWER DDR (VDRAMNRAMNMEM)
VDS: VOLTAGE DRAM SOURCE
PGOOD: Power good open-drain output
VFB: feedback inputs Power
PIR: PRODUCT IMPROVED RECORD
VGS: VOLTAGE GATE SOURCES
PSI #: Current indicator input
VIN: Input Voltage Range
PVC C: IC power positive supply
VIN: ADAPTER POWER SUPPLY (volt in)
RSMR ST: Resume Reset
VL: Power Lock
R TC: REAL TIME CLOCK
VL: voltage across the load/Tegangan beban resistor
SB: South Bridge
VL: Voltage Linear
SHDN: Shutdown
VLDOIN: Power supply of the VTT and VTTREF output stage (to power MOS)
SYS_SDN: System Shutdown
VOT: Volt out
SPI: Serial Peripheral Interface
VRAM: Power memory
VREF: POWER REFERENCES/SCHEMA REFERENCE/PERMINTAAN SKEMA
VS: SUITCH POWER
TD: Death Time
VS+: SUPPORT VOLTAGE POSITIF
THRM: THERMAL SENSOR
V SB: SOWER SWITCH BUTTON
TMDS: Transition Minimized Differential Signalling (TRANSMISI DATA TEKNOLOGY)
VSS: Signal ground
VSW: POWER SWICT
TP: TES POINT
VTT: Memory Termination Voltage
TPAD: THERMAL PAD
VTERM: Memory Termination Voltage
VUSB: POWER USB
VGA: POWER VGA (VGPXNGPUNCVOD)
VGFX: POWER GRAPHIC CHIP
VREF: VOLTAGE REFERENCES
C N=Connector
D=Diode
R=Resistor
C=Capacitor
U= (chip) IC
XIY= Crystal
UIQ= Mosfet
L= Coil
H= Hole
PAD = (pad)
SW = switch
PQ= Power Mosfet Big
PD= Power Diode
PU= Power IC
PR= Power Resistor
PC= Power Capacitor
PL= Power Coil

IDENTIFICATION OF BASIC ELECTRONIC COMPONETS THEIR CHARACTERISTICS & TESTING

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BEFORE REPAIRING ANY ELECTRIC OR ELECTRONIC DEVICE WE SHOULD KNOW HOW TO USE MULTIMETER

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