The main voltage source.
The primary voltage source is IBM denoted by the letter M at the end as the voltage:
- VCC5M
- VCC3M
- VCC1R8M
- VCC1R2M
1 - controller of switching the primary voltage generated.
a) When mounted via pin Adapter DC-IN
Figure 19 - power control circuit mode with DC adapter plug-IN
Analysis:
- The switching voltage will create VCC5M, VCC3M, VCC1R8M and VCC1R2M. To generate the voltage, the switching requires two conditions to be VINT16 voltage supply and control commands from IC VCC5M_ON and VCC1R8M_ON PMH4 taken to control sources.
- When power VCC3SW, PMH4 source driver ICs will operate, originally 73 feet (EXT-PWR) of the IC has a high resistance due to polarization and R110 and R53 IC temporarily without a command.
- If you plug the vacuum Adapter DC-IN, the voltage is 16V Adapter voltage should go through the R870 passing through Zener diode D9 (12V) for light polarized in Q73 lead, making the voltage pin 73 (EXT -PWR) lows, the EXT-PWR pin is low, the source driver IC will PMH4 VCC5M_ON and VCC1R8M_ON order to control for the circuit switching operation.
- When switching-5V operating voltage will produce VCC5M, this voltage-3V Click for switching operation, switching-3V operating voltage generated VCC3M, PMH4 source driver IC will check the voltage MPWRG signal through about 18 feet, if that is true VCC3M voltage 18 will be high, this is the last leg of the incident controller IC PMH4, if this pin voltage, the IC will lose lock The next command and it will not have the secondary voltage.
b) When the machine is not mounted Adapter - PIN only
Analysis:
- When the PIN is still associated, IC TB62501 boot source is powered through VREGIN16 components: Fuse F2 => resistor R453 => diodes D10 level on pin 57 of IC-TB62501.
- Voltage IC-TB62501 VCC3SW created by the legs 59 to power the control IC through pins 7,31,59,80,98 PMH4 sources.
- If we do not plug the Adapter EXT-PWR pin will be high and the source driver IC does not give orders and VCC1R8M_ON VCC5M_ON, only when you press the switch on the machine PWRSWITCH, then pin 32 of IC-PMH4 down IC at low levels and this will give the command VCC1R8M_ON VCC5M_ON and to control circuit for switching operations generate the voltage levels.
- Chan 18 of the IC-PMH4 checks VCC3M source, if this voltage is 18 feet high and IC-PMH4 will continue to open up the command to open a secondary source.
Figure 20 - Diagram controller mode only source PIN
Questions and answers:
1) The voltage source is what and when they occur?
Answer:
- The voltage source is the power that appears when you press the switch or when we plug adapter (even if not press the switch but Adapter leg mount DC-IN)
- The voltage source is often the sign of M in the tail, there are four primary voltage on the IBM machine that is VCC5M, VCC3M, VCC1R8M and VCC1R2M
Answer:
- The voltage source is the power that appears when you press the switch or when we plug adapter (even if not press the switch but Adapter leg mount DC-IN)
- The voltage source is often the sign of M in the tail, there are four primary voltage on the IBM machine that is VCC5M, VCC3M, VCC1R8M and VCC1R2M
2) The conditions for the machine to the voltage is what?
Answer:
- The voltage of the circuit switching to create, so to have the voltage it needs the following conditions:
* themselves SWITCHING source works well
* There VINT16 voltage for the circuit switching.
* There VCC5M_ON and VCC1R8M_ON control commands from the controller IC
to power PMH4 taken.
Answer:
- The voltage of the circuit switching to create, so to have the voltage it needs the following conditions:
* themselves SWITCHING source works well
* There VINT16 voltage for the circuit switching.
* There VCC5M_ON and VCC1R8M_ON control commands from the controller IC
to power PMH4 taken.
3) Conditions for source driver IC PMH4 for the command and control VCC5M_ON VCC1R8M_ON What?
Answer:
- To control IC PMH4 source for the command and control VCC5M_ON VCC1R8M_ON should have the following conditions:
* voltage for IC-PMH4 VCC3SW
* PMH4 good source driver IC
* 73 Foot (EXT-PWR) has a low
leg power adapter DC-IN>
* Chan 32 (PWR SWITCH) is a low
press switch to open source >
Answer:
- To control IC PMH4 source for the command and control VCC5M_ON VCC1R8M_ON should have the following conditions:
* voltage for IC-PMH4 VCC3SW
* PMH4 good source driver IC
* 73 Foot (EXT-PWR) has a low
leg power adapter DC-IN>
* Chan 32 (PWR SWITCH) is a low
press switch to open source >
4) I want to check the voltage VCC5M, VCC3M, VCC1R2M VCC1R8M and then measuring where?
Answer:
You can measure the voltage across the coil at the top of the scale with voltage DC
Answer:
You can measure the voltage across the coil at the top of the scale with voltage DC
Figure 21 - Location of measuring the voltage on the machine.
- Measure the voltage at the coil L3 VCC5M if 5V is OK
- Measure the voltage at the coil L4 VCC3M if 3V is OK
- Measure the voltage at the coil L19 VCC1R8M if 1.8 V is OK
- EMG pressure at the top of the coil L8 VCC1R2M if 1.2 V is OK
- Measure the voltage at the coil L4 VCC3M if 3V is OK
- Measure the voltage at the coil L19 VCC1R8M if 1.8 V is OK
- EMG pressure at the top of the coil L8 VCC1R2M if 1.2 V is OK
5) When determining the machines lost the primary voltage source as VCC5M, VCC3M, VCC1R8M we must check what?
Answer:
- When it lost the primary voltage as VCC5M, VCC3M, VCC1R8M or VCC1R2M the you need to check the voltage of the following:
* Check the voltage VINT16 (see previous section)
* Check if the command takes the same time two VCC5M_ON voltage VCC5M and
VCC3M
* Check if the loss of voltage command VCC1R8M_ON VCC1R8M
Answer:
- When it lost the primary voltage as VCC5M, VCC3M, VCC1R8M or VCC1R2M the you need to check the voltage of the following:
* Check the voltage VINT16 (see previous section)
* Check if the command takes the same time two VCC5M_ON voltage VCC5M and
VCC3M
* Check if the loss of voltage command VCC1R8M_ON VCC1R8M
To check on your command line look at the following photos:
Figure 22 - PMH4 source driver IC is the cause of many problems on the source.
Figure 23 - IC-PMH4 and legs related to the process of open source.
Analysis:- usually two orders VCC1R8M_ON VCC5M_ON and will simultaneously command at a time and voltage around 3V, so the output voltage of this pin should meet the following conditions:
* The power supply pins of the IC-PMH4 VCC3SW (7,31,59,80,98 feet) required
voltage 3V
* 73 Foot (EXT-PWR) should be low (0V) when I plug the Adapter.
* Chan 32 (PWR SWITCH) should be low (0V) when you press the switch to open
source.
=> If you plug DC-IN Adapter leg but still measured 73 feet high (3V)
, you check the components R873, D9, Q73 and Q53 in Figure 19 and Figure
24, 25 below:
Figure 24 - Location of components R870, D9, Q73 to electrical signals from the
adapter to the foot 7 3 (EXT-PWR) of the IC controller PMH4
adapter to the foot 7 3 (EXT-PWR) of the IC controller PMH4
Figure 25 - Q53 on the way to light signals from the Adapter to
73 feet (EXT-PWR) of the IC controller PMH4
73 feet (EXT-PWR) of the IC controller PMH4
2 - create a voltage switching VCC5M (5V) and VCC3M (3V)
IC MAX1631 oscillator.
IC MAX1631 oscillator.
Figure 26 - Circuit switching voltage generated VCC5M and VCC3M
Analysis:
SWITCHING resources created circuit voltage and VCC3M VCC5M include the following elements:
- Oscillator MAX6131 IC.
- Two power lights (single Mosfet reverse) Q16 and Q17 to control VCC5M voltage (5V)
- Light Mosfet dual (double contrast) Q18 to control VCC3M voltage (3V)
The conditions for circuit operation:
- V + supply voltage to pin 22 of MAX1631 IC oscillator, voltage is supplied from voltage VINT16 after going through R523 (10Ω)
- Chan 23 (SHDN) voltage of about 3V, if this pin voltage = 0V, the IC oscillator will be locked, does not work.
- Chan 7 (TME/ON5) can command high voltage (3V) to open source VCC5M
- Chan 28 (RUN/ON3) can command high voltage (3V) to open source VCC3M
After all the conditions on the IC oscillator will operate to produce the oscillation signal at the foot DH5, DL5 control the lights Mosfet Q16 and Q17, and ranging DH3, DL3 control lights dual Mosfet Q18.
Principle of operation:
- Voltage VINT16 will power the lights in the leg D Q16 and Q18 but the light is not working if not controlled oscillator pins G.
- Voltage VINT16 go through R523 (10Ω) Power in leg 22 of the MAX1631 IC oscillator.
- Resistor R903 will be polarized to 23 feet (SHDN) is high to allow the IC is ready for operation, if the shutdown command from the IC to boot PWRSHUTDOW TB62501 SHUTDOW2 signal sent to or from the IC report of CPU overheat - LM26 taken to the leg 23 (SHDN) will be low and the IC will be locked.
- When the pin 23 is placed high on IC ready, if pin 7 (TME/ON5) is high, the IC will fluctuate in DH5 and legs to control the lamp DL5 Mosfet Q16 and Q17-generating activities VCC5M voltage (5V), if the foot 28 (RUN / ON) is high, the IC will fluctuate in the DH3 and legs to control the lamp DL3 Mosfet Q18 reverse dual voltage operation make VCC3M (3V ).
- The lights Mosfet Q16 and Q17 operate on the principle of push-pull, the lights on the leading lights turned off and vice versa, creating spikes in the middle, the coil L3 and the capacitor voltage filter for filtering will VCC5M flat.
- Similar to the lamps in pairs Q18 also acts to create a voltage pulse at the midpoint, coil L4 and capacitor filter will filter into a DC voltage source VCC3M flat out.
Figure 27 - Regional SWITCHING power circuit supply voltage and VCC3M VCC5M
Figure 28 - Conditions for the MAX1631 IC oscillator operation is pin 22 voltage 11V
or 16V PIN mounting and mounting adapter must have 23 feet high (3V)
or 16V PIN mounting and mounting adapter must have 23 feet high (3V)
Figure 29 - After the voltage of power supply voltage on pin 22 and allows the foot 23
should be open command VCC5M_ON (3V) levels on the pins 7 and 28 pins of the IC
should be open command VCC5M_ON (3V) levels on the pins 7 and 28 pins of the IC
Questions and answers:
1) Voltage VCC3M VCC5M and can measure at any location on your computer?
Figure 30 - Location switching control circuit voltage and VCC3M VCC5M on an IBM-T40, T41, T4
2) The power and VCC3M VCC5M they appear and when they appear together?
Answer:
- The power and VCC3M VCC5M appear when you press the switch to open source (if the phone is not attached to the foot DC Adapter -IN), or it will appear when you plug the adapter (including not power)
- The voltage appearing at the same time but using the MAX6131 IC fluctuations of voltage 5V line to power the legs VCC5M VL, so if it takes 5V IC voltage fluctuations will interrupt.
Answer:
- The power and VCC3M VCC5M appear when you press the switch to open source (if the phone is not attached to the foot DC Adapter -IN), or it will appear when you plug the adapter (including not power)
- The voltage appearing at the same time but using the MAX6131 IC fluctuations of voltage 5V line to power the legs VCC5M VL, so if it takes 5V IC voltage fluctuations will interrupt.
3) Assuming failure of the circuit generated voltage Mosfet VCC5M cause VCC5M source (5V), but the circuit is good, creating pressure VCC3M VCC3M voltage (3V) out?
Answer:
- If the failure of circuits generate voltage Mosfet VCC5M (d. 5V) when the VL pin of the IC voltage fluctuations and IC will take off after a second oscillation, so the source of pressure vessels VCC3M although good but does not work and no voltage VCC3M out.
Answer:
- If the failure of circuits generate voltage Mosfet VCC5M (d. 5V) when the VL pin of the IC voltage fluctuations and IC will take off after a second oscillation, so the source of pressure vessels VCC3M although good but does not work and no voltage VCC3M out.
4) If the failure of the circuit generated voltage Mosfet VCC3M there VCC5M not affect the power?
Answer:
- If the circuit Mosfet VCC3M source part (not short) voltage loss VCC3M not affect the power circuit for VCC5M voltage that may still VCC5M.
Answer:
- If the circuit Mosfet VCC3M source part (not short) voltage loss VCC3M not affect the power circuit for VCC5M voltage that may still VCC5M.
5) During repair we have to check and repair any power circuit before.
Answer:
- In the repair process, we need to check and correct the source VCC5M first, then inspect and repair the source VCC3M we review the magnetic power as follows:
Power PIN (VBAT) => a VREGIN16 => have VCC3SW & VINT16 => Click open source => comes VCC5M => VCC3M sources.
Answer:
- In the repair process, we need to check and correct the source VCC5M first, then inspect and repair the source VCC3M we review the magnetic power as follows:
Power PIN (VBAT) => a VREGIN16 => have VCC3SW & VINT16 => Click open source => comes VCC5M => VCC3M sources.
6) Method of test and repair resources VCC5M like?
Note : Power source voltage VCC5M first appeared when I plug the adapter or when you press the switch to open source, if this source is not running, nor VCC3M source and when the protection circuit will not lock the circuit Other resources activities. so we need to check sources first and then to VCC5M VCC3M sources.
* If you measure VCC5M source (5V) voltage that loss, we check the following: Step 1 - First you need to check the voltage VINT16
VINT16 If power failure, you should check the circuit to create pressure VINT16 as
mentioned above.
VINT16 If power failure, you should check the circuit to create pressure VINT16 as
mentioned above.
Figure 31 - Measure the voltage at the coil L3 VCC5M if the circuit operating voltage will be 5V, the voltage measured at pin D of the lamp VINT16 Mosfet Q16 is not running Pin 11V or 16V when running the Adapter
Step 2 - Check your legs power the IC leg 22 (V +) see a voltage
around 10V if only add if your PIN or approximately 15V adapter.
around 10V if only add if your PIN or approximately 15V adapter.
Figure 32 - Measurement of test voltage at pin 22 (V +) of the IC oscillator
MAX1651 to be 10 to 15V
- If the test shows the voltage V + in the legs 22 of the IC-MAX1651 are not enough and the IC gets hot, the IC was Short
- If the voltage loss in the legs 22 should check that this foot was not touching ground?, this pin is usually relatively high impedance compared to mass, if the MAX1651 22 feet touch the ground will usually break VINT16 resistor R523 on the power pins.
MAX1651 to be 10 to 15V
- If the test shows the voltage V + in the legs 22 of the IC-MAX1651 are not enough and the IC gets hot, the IC was Short
- If the voltage loss in the legs 22 should check that this foot was not touching ground?, this pin is usually relatively high impedance compared to mass, if the MAX1651 22 feet touch the ground will usually break VINT16 resistor R523 on the power pins.
Figure 33 - Resistor 523 (10 Ω) 22 Power VINT16 leg of the IC-MAX1651
Step 3 - Check the 23 pin (SHDN) should be about 3V
- Chan 23 (SHDN) is connected to the control voltage and signal PWRSHUTDOWN shutdown due to CPU overheat shutdown SHUTDOW2 born, if this power vacuum pressure = 0, the IC - MAX1651 will be locked does not work.
Figure 34 - Test 23 feet should be about 3V, the IC can operate
- If the voltage is 23 takes you to temporarily isolate this pin from the shutdown signal SHUTDOWN to fix this before the power circuit by temporarily removing the dual diode D12 from the factory.
Figure 35 - Foot 23 (SHDN) is connected to the shutdown signal lines through diodes D12
Figure 36 - Location dual diode D12 connected to the leg 23 of the MAX6131 IC range
Please temporarily remove the diode D12 from the circuit in order to isolate the leg 23 (SHDN) of the MAX1651 IC fluctuations in the repair process VCC5M sources
Figure 37 - 5V power generated control command (VCC5M) goes to pin 7 and generate power control commands 3V (VCC3M) goes to pin 28 of MAX1651 IC range
- When you plug the adapter or when you press the power button, the legs of the machine must have a voltage of about 3V voltage is ordered by the IC VCC5M_ON - PMH4 created.
- If the voltage loss in the legs 7 and 28, you can isolate This two-legged play off them and leave the voltage across R 1K VCC3SW to assume command.
- If the loss of voltage on pins 7 and order 28 feet, the cause of damage due to power control IC PMH4 not give commands VCC5M_ON
- If the voltage loss in the legs 7 and 28, you can isolate This two-legged play off them and leave the voltage across R 1K VCC3SW to assume command.
- If the loss of voltage on pins 7 and order 28 feet, the cause of damage due to power control IC PMH4 not give commands VCC5M_ON
7) Provide the structure and pinouts of the lights on the circuit power Mosfet and VCC3M VCC5M.
Figure 38 - Location of the Mosfet circuit light sources and VCC3M VCC5M
Figure 39 - Map and structures within the foot single reverse Mosfet IRF 7807
Figure 40 - Map of the legs and inner structure of the reverse lights dual Mosfet FDS6986S
Indicate the structure and meaning of IC pins ranging MAX1631Foot | Name | Function |
1 | CSH3 | Current Sense High Input - Sensor high input line |
2 | CSL3 | Current Sense Low Input - Sensor low input current |
3 | FB3 | Input feedback - feedback voltage of 3V line |
4 | 12OUT | 12V OUT - Foot 12V output voltage |
5 | VDD | Vol Supply Input for 12VOUT - Power input to 12VOUT |
6 | SYNC | Oscillator Synchronization - Synchronize ranges |
7 | TIME/ON5 | ON / OFF Control 5V - Foot controlled way off 5V |
8 | GND | Ground - Foot Mass |
9 | REF | 2.5 Reference Voltage - Voltage 2.5 V standard |
10 | SKIP | Connect GND for Normal User - Connect using the normal mass |
11 | RESET | Output Reset - Reset signal to |
12 | FB5 | Feedback Input for 5V - 5V Chan of the road to recovery |
13 | CSL5 | Current Sense Low Input - Sensor low input current |
14 | CSH5 | Current Sense High Input - Sensor high input line |
15 | SEQ | Select Voltage 5V or 3V forward voltage depending on the SEQ pin |
16 | DH5 | High Drive - Gate to high voltage fluctuations |
17 | LX5 | |
18 | BST5 | Boost Capacitor - Capacitor booster |
19 | DL5 | Drive Low - Gateway to the low voltage range |
20 | PGND | Power Ground - Mass of the source |
21 | VL | Chan receives supply voltage from 5V output |
22 | V + | Foot-powered wide-ranging changes from 4.2 V to 30V |
Figure 41 - Block diagram of oscillator IC - MAX1631
23 | SHDL | Active Low Shutdown Control - Foot off the low |
24 | DL3 | Low Drive - Output voltage range is lower |
25 | BTS3 | Boost Capacitor - Capacitor booster |
26 | LX3 | |
27 | DH3 | High Drive - Output voltage range is higher |
28 | RUN/ON3 | ON / OFF Control Input - Foot controlled power switches 3V |
Note the pins of the IC
MAX1631 IC oscillator simply note the following legs:
- Chan V + pin is the main source for the IC level, the source is allowed to vary from 5 to 24V
- VL is the voltage for the circuit in the IC, the voltage is 5V, the voltage sources to get feedback from the 5V output.
- Truth is truth SHDL Shutdown (lock IC) when placed at low levels.
- Truth does SEQ pin voltage select before or after, the IBM laptop is connected to this pin fixed voltage Vref 2.5 V standard
- Truth is truth RUN/ON3 VCC3M the condition of open source when activated at high levels.
- Truth is the foot control TIME/ON5 open source VCC5M when activated at high levels.
The following table describes the operating status of the IC when the leg is controlled by the voltage:
SHDN | SEQ | RUN/ON3 | TIME/ON5 | MODE | Description |
Low | x | x | x | Shutdown | The volume of IC off |
High | Vref | Low | Low | Standby | IC in standby |
High | Vref | High | Low | Run | Source 3V run / 5V off |
High | Vref | Low | High | Run | Power off 3V / 5V run |
High | Vref | High | High | Run | Both sources are running |
Notes:
- High: high voltage level.
- Low: low voltage.
- Vref: voltage 2.5 V standard
- x: Not determined.
- Run: run.
3 - IC oscillator controls the MAX1845 low-voltage source.
On the laptop IBM T40, T41, T42 up to three control IC MAX1485 low-voltage sources such as:
- VCC1R2M
- VCCCPUIO
- VCC1R8M
- VCCVIDEOCORE
- VCC2R5A
- VCC1R25B
In the ingress and VCCCPUIO VCC1R2M use a range IC, ingress and VCCVIDEOCORE VCC1R8M use a range IC, ingress and VCC1R25B VCC2R5A use a IC.
Figure 42 - Location of the MAX1845 IC oscillator on an IBM T40-41-42
* Map the principle of operation of oscillator IC MAX1845
Analysis:
- MAX 1845 IC oscillator is often used on circuit switching of the laptop to control the low voltage, this IC has two sides, each side has two ports that is DH and DL, each gateway will control a Mosfet lights, port lights DH Mosfet controller port on the DL also controls the lights Mosfet.
- To operate the IC to a voltage V + from 5 to 24V, 5V supply voltage for die pins VDD and VCC, control commands to the legs and On2 ON1
Figure 43 - Map source circuit using IC - MAX1845
Description of the IC pins
PIN | NAME | Function |
1 | OUT1 | Chan asked the output voltage of IC |
2 | FB1 | Chan received feedback voltage, control voltage at this pin will change the output voltage from 1V to 5V, IC has been designed to match mass FB pin to the default voltage is 1.8 V. |
3 | ILIM1 | Chan created a threshold voltage OUT2 port, depending on the voltage into this vacuum that the threshold voltage will change. |
4 | V + | Truth to power IC |
5 | TON | Chan set the operating frequency of the circuit |
6 | SKIP | |
7 | PGOOD | Chan reported good source, this pin will be low if no output voltage is higher than 10% or |
8 | OVP | Over Voltage Protect - surge protection, connect this pin, the IC will be mass surge protection when applied to more than 115% increase, if this pin is connected Vcc overvoltage protection function will be disabled. |
9 | UVP | Under Voltage Protect - Protect pressure drop, if this pin is connected to Vcc, the circuit will be protected when the pressure falls below 70%, if this pin connected to this mass function is disabled. |
10 | REF | Applying the standard 2V and can provide a current load 50μA |
11 | ON1 | Open-source voltage command feet first |
12 | On2 | Open-source voltage command Truth No. 2 |
13 | ILIM2 | Chan made a threshold voltage for the port OUT2 |
14 | FB2 | Similarly, but for port pins FB1 FB2 |
15 | OUT2 | Similarly, but for port pins OUT1 OUT2 |
16 | CS2 | Current Sense - Truth current sensor |
17 | LX2 | |
18 | DH2 | High Drive - Foot oscillation pulses of high amplitude |
19 | BST2 | Chan offset voltage |
20 | DL2 | Foot pulse amplitude fluctuations less control under the lights Mosfet |
21 | VDD | 5V voltage leg raising |
22 | VCC | Chan voltage circuit for standard voltage VREF generated |
23 | GND | Mass Foot |
24 | DL1 | Foot range to control lights under a low power pair |
25 | BST1 | Chan offset voltage |
26 | DH1 | Oscillation amplitude leg out to control the lights high above Mosfet |
27 | LX1 | |
28 | CS1 | Foot sensor line. |
4 - Power Switching voltage generated VCC1R8M
Voltage VCC1R8M by the side of the MAX1845 IC oscillator U51 is controlled, with lights dual Mosfet Q71 and the coil L19, the location of the circuit on an IBM T40-41-42 as follows:
Figure 44 - Location of IC oscillator U51 (MAX1845) and coil L19