Mainboard : Circuits source CPU ( VRM – Regu Vol Module )
The position of the motherboard VRM circuit
What is VRM ? – VRM is ( Vol Regu Module – Module voltage stabilizer ) – circuit stable voltage for the CPU
– Circuit VRM ( voltage stability for the CPU ) is usually located next to the CPU socket , circuit components include :
– IC fluctuations ( also called the IC pulse -)
– IC -phase islands ( known as drivers , driving pulse -)
– The lights Mosfet
– The coil ( including the easily recognizable to the coil mounted around the CPU socket – )
– The filter capacitors ( to and around the CPU – )
The function of the circuit VRM a controller for CPU power supply is stable with a relatively large current of about 8 to 10A
What is VRM ? – VRM is ( Vol Regu Module – Module voltage stabilizer ) – circuit stable voltage for the CPU
– Circuit VRM ( voltage stability for the CPU ) is usually located next to the CPU socket , circuit components include :
– IC fluctuations ( also called the IC pulse -)
– IC -phase islands ( known as drivers , driving pulse -)
– The lights Mosfet
– The coil ( including the easily recognizable to the coil mounted around the CPU socket – )
– The filter capacitors ( to and around the CPU – )
The function of the circuit VRM a controller for CPU power supply is stable with a relatively large current of about 8 to 10A
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VRM circuitry on the motherboard ASUS Socket 478
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VRM circuit on motherboard socket 775 GIGABYTE
VRM circuit on the motherboard GIGABYTE Socket 478
Logic circuit diagram of the motherboard VRM
2.1 – The main component of the VRM circuit
– IC range – function oscillators ( pulse PWM – pulse width modulation ) to control the operation of pairs of light Mosfet
– IC phase Islands – split each range into two opposite -phase oscillation is
– LED Mosfet – Activity -interrupt the control signal of the PWM pulse , the pulse -phase PWM with the Mosfet positive lead , while the negative phase pulse PWM Mosfet is off .
– Coils – combined with capacitors to filter the voltage pulses into DC voltage DC
– Capacitors – combined with the filter coil voltage pulses into DC voltage DC
2.2 – Principles of operation of the VRM circuit :
– When the supply voltage VCC to the IC fluctuations ( ISL 6565A ) simultaneously PGOOD legs ( leg press ATX power problems ) have reported the average voltage ICs will operate , it generates pulses PWM1 , PWM2 and PWM3 to 3 pairs of lights for Mosfet
– The PWM pulse is split into two impulses are in opposite phase when passing through the island IC phase , then the two phases will lead to the opposite impulse control leg of the light G Mosfet .
– When the light pulse is positive Mosfet drivers it would lead , have pulse audio controller it will break , so will shut off lights Mosfet continuous oscillation frequency of the PWM pulse
– Two pairs of lights on each Mosfet will close off alternate lights led the other lights off and vice versa , creating a voltage pulse in the middle .
– After the voltage pulse filter circuit will be L – C filter into a voltage level to one-way flat CPU
2.3 – Features circuit of VRM
– Circuit voltage converter from 12V down to approximately 1.5 V and current up to about 8 from 2A to 10A
– Circuit itself has little capacity loss is only about 20 % effective capacity .
– Denmark has the ability to automatically adjust the CPU voltage level signal through the logic at the foot VID0 , VID1 , VID2 ,
VID3 , VID4 report from the CPU .
– Pentium 4 motherboard on the CPU when not attached to the VID pins and a valued logic circuits give voltage VRM
by default 0V ( note the very important – lqv77)
– Input Voltage VRM on the motherboard ‘s circuitry is 12V 4 pen , 3 pen on the motherboard is 5V
– Voltage output of the circuit on the motherboard VRM 3 pen when not attached to the CPU is about 1.6 V
– When the supply voltage VCC to the IC fluctuations ( ISL 6565A ) simultaneously PGOOD legs ( leg press ATX power problems ) have reported the average voltage ICs will operate , it generates pulses PWM1 , PWM2 and PWM3 to 3 pairs of lights for Mosfet
– The PWM pulse is split into two impulses are in opposite phase when passing through the island IC phase , then the two phases will lead to the opposite impulse control leg of the light G Mosfet .
– When the light pulse is positive Mosfet drivers it would lead , have pulse audio controller it will break , so will shut off lights Mosfet continuous oscillation frequency of the PWM pulse
– Two pairs of lights on each Mosfet will close off alternate lights led the other lights off and vice versa , creating a voltage pulse in the middle .
– After the voltage pulse filter circuit will be L – C filter into a voltage level to one-way flat CPU
2.3 – Features circuit of VRM
– Circuit voltage converter from 12V down to approximately 1.5 V and current up to about 8 from 2A to 10A
– Circuit itself has little capacity loss is only about 20 % effective capacity .
– Denmark has the ability to automatically adjust the CPU voltage level signal through the logic at the foot VID0 , VID1 , VID2 ,
VID3 , VID4 report from the CPU .
– Pentium 4 motherboard on the CPU when not attached to the VID pins and a valued logic circuits give voltage VRM
by default 0V ( note the very important – lqv77)
– Input Voltage VRM on the motherboard ‘s circuitry is 12V 4 pen , 3 pen on the motherboard is 5V
– Voltage output of the circuit on the motherboard VRM 3 pen when not attached to the CPU is about 1.6 V
Logic circuit diagram VRM ( voltage stability for the CPU )
Legend of the IC pins oscillation
– VCC – Power supply for IC
– PWM1 , PWM2 , PWM3 – The foot pulse width modulation to control lead pair of lamps Mosfet
– ISEN1 , ISEN2 , ISEN3 the foot of the current sensor
– EN – Legs for IC operation
– ENLL ( PGOOD foot ) – Foot ATX power status works well
– The foot VID0 , VID1 , VID2 , VID3 , VID4 status logic voltage value for CPU use
– PGOOD , OVP – VRM circuit status of the male chipset
– VSEN – Chan voltage sensor ( foot feedback )
– VCC – Power supply for IC
– PWM1 , PWM2 , PWM3 – The foot pulse width modulation to control lead pair of lamps Mosfet
– ISEN1 , ISEN2 , ISEN3 the foot of the current sensor
– EN – Legs for IC operation
– ENLL ( PGOOD foot ) – Foot ATX power status works well
– The foot VID0 , VID1 , VID2 , VID3 , VID4 status logic voltage value for CPU use
– PGOOD , OVP – VRM circuit status of the male chipset
– VSEN – Chan voltage sensor ( foot feedback )
VRM circuit on MSI motherboard
- VRM voltage stabilizer circuit on the motherboard MSI
- The similarities and differences between the motherboard ‘s VRM circuitry Petium Pentium 4 and 3
– Principles of operation of the VRM circuitry on the same two types of motherboard
– fundamental difference between the two types of Main VRM circuit is input voltage of 5V motherboard Pen 3 also use the input voltage of 12V using Mainboard Pen 4
– When not attached to the motherboard CPU VRM circuit the pen 3 is the default voltage 1.6 V VRM circuitry of the motherboard also the default Pen fell down 4 wholesale 0V
- Pentium 3 motherboard has only one pair of lights on circuit Mosfet VRM
- Circuits reported incidents of VRM circuit on male Chipset
– When the VRM circuit will work well for signals of chipset reported male VRM_GD said operating state of the circuit has good stability for the CPU voltage , CPU ready hot action .
– Signal Chipset VRM_GD taken as a condition to give south chipset system reset signal , if VRM circuit does not work or have problems, there will be no signal VRM_GD chipset so that the signal will not reset to boot
VRM circuit test methods – Test for CPU supply
When checking the voltage level for the CPU , you should note the following few points :
– With a Pentium 3 motherboard , you can then check for the CPU vCore voltage without the need to add CPU Socket
– With the Pentium 4 motherboard to measure the voltage supply for the CPU , the CPU into the socket you need to add before then , if no CPU VRM circuit of the Main Pen 4 the voltage 0V by default .
– Before you add the socket to check the CPU voltage, you first need to measure vCore voltage ( without CPU ) to exclude cases with short circuit Mosfet VRM as increasing vCore voltage may damage your CPU.
When checking the voltage level for the CPU , you should note the following few points :
– With a Pentium 3 motherboard , you can then check for the CPU vCore voltage without the need to add CPU Socket
– With the Pentium 4 motherboard to measure the voltage supply for the CPU , the CPU into the socket you need to add before then , if no CPU VRM circuit of the Main Pen 4 the voltage 0V by default .
– Before you add the socket to check the CPU voltage, you first need to measure vCore voltage ( without CPU ) to exclude cases with short circuit Mosfet VRM as increasing vCore voltage may damage your CPU.
6.1 – Position measure vCore voltage ( vCore is a source of supply for CPU VRM )
– Please measure vCore voltage ( voltage for CPU ) measured at the beginning of the month with a DC coil , you can measure in both the first coil are , if the alarm clock is about 1.5 V DC VRM circuit was ” OK ” , if the alarm clock voltage of 0 or below 1V VRM DC circuit is broken.
– Please measure vCore voltage ( voltage for CPU ) measured at the beginning of the month with a DC coil , you can measure in both the first coil are , if the alarm clock is about 1.5 V DC VRM circuit was ” OK ” , if the alarm clock voltage of 0 or below 1V VRM DC circuit is broken.
CPU voltage measured at the top level of the positive windings or capacitors 6.3 V
When measuring the voltage level on the motherboard CPU pen to add four new CPU into the socket then the output voltage
measured at the beginning of the output coil ( from 2 to 4 coil outputs are similar in size )
measured at the beginning of the output coil ( from 2 to 4 coil outputs are similar in size )
6.2 – The test procedure and VRM circuitry on the motherboard vCore voltage Pentium 4
Step 1 – Measure the voltage when not attached to the CPU vCore voltage to 0V by wholesalers fell down , if not already installed when vCore voltage CPU VRM has been short circuit is 12V Mosfet above ( D Mosfet has leg match at 12V )
Step 2 – Install the CPU , power supplies , switch , and vCore voltage measured at the foot of the winding
– If the output voltage between 1.5 V VRM circuit is good
– If the output voltage between 1.5 V VRM circuit is good
– If there is no or a low output voltage below 1V VRM circuit is broken
- Explain the steps above then check :Step 1 (Derived and measured without CPU )
– You power the motherboard , the clock in regulation to lift the standard 10V DC vCore voltage measurement at the top of the coil voltage stabilizer circuit of VRM
– Main Fit Test Card to observe the status of the source
– Turn on the switch ( PWR short legs ) to run the main source , the lamp 3.3 V , 5V and 12V light up on the Test Card is a good source and ATX motherboard is not short
– Measure the leg of the coil voltage of 0 V to prone wholesale ( not add due to CPU VRM output voltage circuit default = 0V )
=> If not found add CPU voltage measured at the top of the coil is about 5 to 10V VRM is being short- circuit Mosfet , you should carefully check the lights Mosfet .Step 2 (Turn the source and measure the CPU into the socket was mounted on the Main )
– Install the CPU into the socket on the motherboard ( CPU certainly is good )
– You power the motherboard , the clock in regulation to lift the standard 10V DC vCore voltage measurement at the top of the coil voltage stabilizer circuit of VRM
– Main Fit Test Card to observe the status of the source
– Turn on the switch ( PWR short legs ) to run the main source , the lamp 3.3 V , 5V and 12V light up on the Test Card is a good source and ATX motherboard is not short
– Measure the voltage coil leg up to about 1.5 V ( since when did add CPU = > VRM circuit voltage should produce about 1.5 V or by using the CPU voltage )
=> If the CPU was mounted at the top which shows the coil voltage ( vCore voltage ) is equal to 0V VRM circuit is not activeYou need to be corrected as follows :
– dry vacuum oscillation pulse PWM IC and IC -phase island
– Check if there are any lights Mosfet not be short ?
– Replace IC PWM pulse oscillation
discussion of :
– This article is for you new to the job is extremely difficult not aware ” operating principles ” of the circuit . But for the makers of ” e ” because it is relatively simple circuit ” of the pulse voltage stabilizer “normal . Voltage pulses of this form if you learn via TV or monitor it more complicated . In TV or CRT Monitor circuit ” of the pulse voltage stabilizer ” to get the signal source ” non- recovery ” from ” High voltage transformers ” on … But in this circuit is simply the pulse , there is a supply voltage output . If the CPU would be good ” feedback ” VID0 , VID1 , VID2 , VID3 , VID4 continued operation of vessels , if not better CPU ( or CPU contactless good death ) , the stop pulse level – > interrupt output .
– If you lose power supplies for CPU : check back from the CPU ( make sure the CPU better) good contact with socket CPUs , the best MOSFET ( not touching , breaking , leakage … ) Good Driver IC ( measured by current or wave instead test ) pulse of good IC ( measured by the wave , or rather try ) .
– this circuit if the ” e ” is an easy experience by going to discover information essential http://www.alldatasheet.com to investigate the pulse is on the IC will have an analysis of operating principle details . The English course, then . The more your self-discovery from this suggestion lightly. hardware that people do not know , just as people spend http://www.alldatasheet.com ” removable ” only.
– Because this circuit operation with very high flow should probable damage in this area is great. Know and fix the principle of this circuit is successful 60-70 %
– Early notice important element of this circuit should also have my own an article in the same subject but by receiving and presenting different. All further references .
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