We are using this server for more than 3 years. yesterday, server switched off due to voltage surge. afterthat it is not turning on. even smps not switching on..
Re: We are using this server for more than 3 years....
Sounds very likely that if the power supply isn't even showing signs of life then the surge has killed it, it'll need to be replaced. If your lucky then no other components have been damaged.
The supply in that unit (according to google) is an IBM 340W Power Supply - 24P6898. My searches have found a few refurbished units for about £40.
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Since you haven't mentioned the type of server its unsure server has single type or dual type SMPS. This issue can due to SMPS as well Plannar (motherboard) issue. But as per post i really doubt you have bad motherboard since you see BMC and other LEDS on motherboard gets blinking..
You can troubleshoot motherboard issue this way. Press and hold server power button. Check if this makes server start. If it starts, then its confirmed you have bad motherboard.. You may also inspect whether motherboard has bulged capacitors inside..
To help in identifying common problems in SMPS circuits.
There was a time when we had only transformers fitted on all the appliances which was sturdy and could stand up to rigourous voltage conditions. The disadvantges was the growing cost of copper & lamination metal, the weight and the universal voltage condition.
The switch mode power supply came in to replace all the devices with an added advantage od space, cost and range of voltage but brought in higher failures when there was a voltage error.
So I am listing few tips to look into a SMPS failure and possible safeguards.
First of all in a SMPS failure if a fuse has blown the chances are there is a fault in the circuit and very rarely the fuse can be replaced unless the component is sorted out.
So check from the power supply the possible major components to suspect.:
1. Fuse
2. The surge protector -- usually a varistor ( metal oxide)
3. Rectifiers- in bridge circuit.
4. Chopping oscillators- Intergrated circuit.
5.Chopping drivers-- MOSFETS ( now incorporating a single IC for OSC and drive )
6. SM ferrite transformer.
7. Main filter capacitor ( will be seen as leak or short)
8.Discrete reverse feedback diodes, capacitors or fusible resistors .
9.Optocoupler which is the feedback trigger.
10.Short in the secondary circuit can switch off power by current limiting.
These are the most possible components that one must check on in case of a SMPS failure.
To prevent a SMPS failure it is important that there are no transcient surges in the line supply, So have a good tight connection. If isolation transformers are used for costly sets it will be ideal to check many failures.
Try not to leave the sets always connected to mains except if it is necessary to set the clock functions or timer functions.
Hello
The power regulator board in your Hitachi is not switching. It is an SMPS [Switched Mode Power Supply]. Normally for plasma TVs the power supply repair will be almost impossibele due to lack of component availability. If the fuse is OK, definitley the switching process has failed it it. There is an IC which oscillates at high frequency, whic its oscillation signals are given to MOSFET transistors to chop the incoming AC, converted DC voltage. These switched voltage is passed through SMPS transofrmers which it turn generates secondary voltages that goes to different circuit boards of your TV. The power board is the most important section in a Plasma TV. it must be perfect in every respect in terms of secondary voltages. If any one of this voltage goes over than specified, the main boar will get damaged. So it is adviced to replace it as card basis, rather than making "sugery" to it. The power supply board can be had from Authorised Hitachi Service centers. You just give the the exact model number of your Hitachi TV. They will give you the orginal power supply board. Never play experiments with Plasma TV. OK.
hi, there is possibility of two complaints. 1, The SMPS power supply fault 2. the mother board fault. if the SMPS is faulty the you can rectify the problem. If it is with the mother board the you have to contact the manufacturer . First of all you have to check the SMPS ( switch mode power supply). you have to check the voltages at it secondary stage. 5v, 12v, etc switched-mode power supply (switching-mode power supply, SMPS, or simply switcher) is an electronic power supply
that incorporates a switching regulator in order to be highly efficient
in the conversion of electrical power. Like other types of power
supplies, an SMPS transfers power from a source like the electrical power grid to a load (e.g., a personal computer) while converting voltage and current
characteristics. An SMPS is usually employed to efficiently provide a
regulated output voltage, typically at a level different from the input
voltage for checkin the SMPS voltaes you need a multimeter. And check the voltages at it secondary stage Added the inside view of BD 1600
if there is no outputs from the smps then you have to replace the SMPS drive STR ic near the big capacitor. Also ty to replace the OPTO coupler ic. y have to check the all resistors near the ic.
Remember one important thing that the capacitor can hold charge for some time even if you disconnect the power. so after removing the power. remove the SMPS very carefully. discharged the capacitor using a bulb. i have also added a video for SMPS working for you reference will hep you for repairing your one
Can vary from the fuse , surge protectors and possible compoents in the SMPS, the swittch mode power supply.
So use a meter to check for short inthe SMPS, if so check after suspectng on the rectifier, the filter capacitor or the OSC/DRIVER output. If not on the primary side and all voltagesare correct, then a short onthe seccondary side can switch offf the SMPS with the feedback current limiter. If so you will need to check one by one to disconnect and find the voltage build up to center on the fault.
Please check your battery for right voltage. if the voltage is down check the voltage in your adapter. If there is no voltage in the adapter then you might have to open check the continuity of the cord, normally this cord shorts and the adapter cutts off supply due to a high current error. So if there is shor tremove or other wise check the SMPS circuit for failed components, fuse, recifier, capacitor, driver. However if adapter works there must be supply at the battery terminal of the laptop, if not you have a failure in the charging circuit in the laptop. Hope you check this out one by one. Hope I could help. Good day
Yes pwer in entering since the LED lights up but most probably your SMPS orpower supply has fried due to a voltage surge. Try replacing the Power supply unit and see if there is any difference(use a working SMPS for trial and if this works, you have the solution...........sodeep
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