20" ALS Power Supplies Faulty?

In September we received 40 20" ALS iMacs. 4 of those have had power supplies fail. That's a 10% failure rate in less than 3 months of use. All of them have the symptom of LED #2 momentarily lighting up after power on.
Has anyone else noticed a trend with those models? I have a tech assist follow up # with Apple, and if I get another failure they want me to call them to try to capture what is happening.
20" ALS G5 iMac Mac OS X (10.4.3)

I have that same model since about July. It has been on about 90% of the time between then and now (I seldom will ever turn it off) and haven't had any issues with the power supply. I do have it running off a UPS that filters the power though to make sure it is getting a clean supply.

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UPS and 2 power supplies

Out of curiosity, what happens if only one of the two power supplies is kept on UPS and the power goes out?

What do you think will happen?
The power supply connected directly to the main power will go offline.
The power supply connected to the UPS will stay up (as will your RAID).
Your UPS will start to drain.
Ultimately, if the power stays off long enough, the UPS will be unable to sustain sufficient voltage and the second power supply will go offline, bringing down your RAID.
Is that what you mean?
Note that the XServe RAID can have a fairly significant power draw. You need to make sure your UPS is sized sufficiently for your expected runtime.

Control eight 200mA power supplies

I need to control about eight 200mA power supplies. Each supply should be programmable from minus
30 volts to plus 30 volts. I need to be
able to sequence the outputs (have one output go to 5V, next another output go
to 8V, etc.). The next thing I need is
to output a serial data stream of about 10 bits.
My test case would be the following:
Sequence several of the outputs to different voltages, this
puts the ASIC I am testing into the mode I need. Then I need to have one of the
power supplies output a serial 10 bit word to load a register inside the ASIC.
Does anybody know if this could be done with a DAQ-card?

Hi Gary,
M Series DAQ cards provide a very flexible tool. You can have Digital Input and Output, Analog Input and Analog Output. The question is how are you going to control the Power Supplies? Do they take digital commands, or can you input an analog voltage as centerbolt mentioned? If you do need an analog output to control the power supply, then the standard multifunction DAQ cards will not work for you, because they only have at the most 4 analog outputs. There are dedicated Analog output cards that could provide this functionality.
The other idea is that you want the DAQ card to be your power supplies for you. If that is the case then that would greatly change what you require from the card, and no single card will be able to do that for you. Finally how does the power supply output a 10 bit serial word, is that inherent in a piece of hardware you already have, and if so how do you tell it to make that output. Please get back to me and we can probably find a solution that would work for you.
Have a great day,
Michael D
Applications Engineer
National Instruments

Willl these power supplies work with Athlon64?

Hi.
The pc i'm going to build is:
Athlon 64 3000 (or maybe 3400 )
MSI k8t-neo fis2r
2 x 512mb kingston valueram
HD hitachi 7k250 sata 160gb
9800pro
dvd-rom + cd-rw (or dvd-rw)
My question is: will these 2 power supplies work fine?
1) CODEGEN-IPERTEK 450W
+3,3V 20 A
+5V 40A
+12V 16A
2) Techsolo TP - 500
+3,3V 28 A
+5V 38A
+12V 17A
Thank you!

Ok, you convinced me to buy its "bigger brother"
My last question is, which one of these 2?
1) Enermax EG475AX-VE SFMA (470w) I think it's the one of this review: http://www.extremeoverclocking.com/reviews/cases/Enermax_EG475AX-VE_1.html
2) Enermax EG465AX-VE FMA (460W) http://www.computex.com.tw/detail_productmain.asp?index=03061&pcode=M0200&show=oneproduct&pname=EG465AX-VE+FM+(24P)
Which one should I buy? I would prefer the first one cause it's easier to get and it also has 2 sata connectors, but my doubts are:
It's a noisetaker, is it good?
It's dual 12V rails, with + 12,0V(1) = 16A and + 12,0V(2) = 15A. Do you think it's a problem if it's dual rails? I't's better if it is single single rail like the second one?
Thank you

%PLATFORM_ENV-1-PWR_RPS: Redundant power supply faulty or in standby mode

Hi All,
We are getting the below error on our Cisco 3560 Switch and the device is running on the image ":c3560-ipservicesk9-mz.122-55.SE4.bin".
010790: Mar 2 00:19:35 PDT: %PLATFORM_ENV-1-PWR_RPS: Redundant power supply faulty or in standby mode
010791: Mar 2 00:24:35 PDT: %PLATFORM_ENV-1-PWR_RPS: Redundant power supply faulty or in standby mode
010792: Mar 2 00:29:35 PDT: %PLATFORM_ENV-1-PWR_RPS: Redundant power supply faulty or in standby mode
010793: Mar 2 00:34:35 PDT: %PLATFORM_ENV-1-PWR_RPS: Redundant power supply faulty or in standby mode
010794: Mar 2 00:39:36 PDT: %PLATFORM_ENV-1-PWR_RPS: Redundant power supply faulty or in standby mode
010795: Mar 2 00:44:36 PDT: %PLATFORM_ENV-1-PWR_RPS: Redundant power supply faulty or in standby mode
010796: Mar 2 00:49:37 PDT: %PLATFORM_ENV-1-PWR_RPS: Redundant power supply faulty or in standby mode
010797: Mar 2 00:54:37 PDT: %PLATFORM_ENV-1-PWR_RPS: Redundant power supply faulty or in standby mode
DCSW#sh env all
FAN is OK
TEMPERATURE is OK
SW PID Serial# Status Sys Pwr PoE Pwr Watts
1 Built-in Good
SW Status RPS Name RPS Serial# RPS Port#
1 Standby <>
Kindly help me on how to fix this issue and what to do next?

Hi Senthil,
What are the LED status on RPS. It looks like RPS may have gone faulty. How many switches are connected to it? Possibly a reset of RPS could fix this issue, else replace it.
Thanks,
M

Are Satellite C650D power supplies interchangeable?

I have 2 satellite laptops, a C650D with N17908 power supply (19v 3.42A) & a L750 with a N179081 power supply(19v 3.95A).
Are these power supplies interchangable between the 2 laptops? or would I create a problem. The main difference seems to be the output current rating.
Thanks, Mooky

I think you can use it without problems. There is no big difference between AC power devices.
Ive done it several times in the past using AC adaptor from my friend when I was visiting him.
I forgot my AC adapter and used him to load my Toshi.

Will PFC power supplies work with SIMULATED sine wave inputs

Will PFC power supplies work with a SIMULATED sine wave input from a UPS unit?

Not sure whether you really meant "PPC" and have never heard of a PFC power supply, but if your question is whether a Mac PPC computer will run on a UPS, then the answer is definitely "yes" as my machine has shown twice in the past 12 months and several times in the past on the G5 tower and with a G3 B&W.
I haven't dragged the old analog scope off the shelf to see what the UPS output really looks like, but I suspect it is no dirtier than the mains power in my neighborhood.

ALS Power Supply in original iMac G5?

I currently have my iMac in for service, and am wondering if I should stop them from ordering the wrong part, if it is the wrong part. My iMac G5 is an original iMac G5. And the genius bar ended up choosing the Ambient Light Sensor iMac G5 power supply (the second generation, not the first) as a replacement to order. I just noticed this getting back from the store tonight looking at the receipt.
So the question is, will that power supply work in the older iMac G5 if it is in the U.S.?

Have a look at the parts list here, they are very specific that the Ambient light power supply is only for the AL machine. I would call and ask them politely if they are doing the right thing and perhaps they will realise that they are two diffent machines witn two different power supplies.
Please let me know the upshot,
Miriam

Unable to simultaneously ramp up Kepco power supplies(5v,12v) w/ diff ramp rate for each.

Need to ramp up the two power supplies(5v&12v) at exact same time using different ramp rate for each power supply. Tried to use two NI-DAQ cards for each Kepco power supply. Unable to ramp up both voltages at exact same time. There is always approx. 5+ms delay between two power supply. Any suggestions??

You can use one DAQ card with two output to control both power supplies. When you use the analog output, you must provide an array of samples which contain your ramp function. You then output each sample of the array at a specific update rate. If you want to use the same card, you just need have different data arrays for each channel. One ramp with be steeper than the other, but the points with be output at the same rate.
Bill

High mortality of Cisco Linksys power supplies.

Hi experts, we have an high mortality of Cisco Linksys Power supplies used for SPA2102 and WRP400. The duration varies between 8 months to 12 months.
The power supply model is 5V 2A PSM 11 R.
What is the cause in your opinion?
Could be related to electrical ring value configured?
This is our setting according to regional raccomandation:
Regards.

Hello Daniele,
There is no known issue with the power supplies of the SPA2102/WRP400.
Reasons why a power supply is failing can be manifold.
Brownouts, blackouts, environmental reasons.
Your settings are looking ok, around the default values.
And they are lower than what is used in other parts of the world.
Regards,
Daniel

CISCO 3945 Router - ARE POWER SUPPLIES LOAD BALANCED?

CISCO 3945 Routers - Are the 3945 Router power supplies load balanced by default?
We are trying to determine if our switch/server rack at our remote location has maxed out it's power load requirements. I just need to know if the 3945 power supplies load balance by default or if the redundant power supply is ON but not really providing the router with power and is just there incase the other power supply fails - Thank you.

Thank you for your reply. I had read that the "Cisco 3845 and 3845-NOVPN router accommodates two hot-swappable power supplies and a single power supply meets router requirements. The second power supply provides redundancy, load sharing, and increased router availability. Either power supply can be removed without affecting router operation. Any combination of two power supplies is permitted."
Unfortunately, I couldn't find any specific information for the 3900 series routers that stated it also load balanced power.
Follow-up question: Do you know if the 3800 series routers load share by default? I know it is capable of power load sharing based on the above description but do they load share equally by default? If that's the case for the 3800's then hopefully that's the case for the 3900'S series routers. Which means, we have not maxed out our power requirements in our racks.

Monitoring Power Supplies in Prime Infrastructure 2.1

Hi,
Prime Infrastructure is capable of monitoring the power supplies from Cisco devices? Where can I see this feature on PI 2.1? is there any option to enable this, if it's capable?
Thanks

There are two options :
1. You poll the devices for Power supply and see the report based on it.
2. You can configure your devices for environment traps and the device will send traps to PI which can be used as an alert/Alarm in PI.
Envmon traps in Cisco devices can be configured using snmp-server enable traps envmon command.
This command enables or disables Environmental Monitor (EnvMon) status notifications for supported systems. Cisco enterprise EnvMon notifications are triggered when an environmental threshold is exceeded. If none of the optional keywords are specified, all available environmental notifications are enabled.
When the shutdown keyword is used, a ciscoEnvMonShutdownNotification (enterprise MIB OID 1.3.6.1.4.1.9.9.13.3.1) is sent if the environmental monitor detects a testpoint reaching a critical state and is about to initiate a shutdown.
When the voltage keyword is used, a ciscoEnvMonVoltageNotification (enterprise MIB OID 1.3.6.1.4.1.9.9.13.3.2) is sent if the voltage measured at a given testpoint is outside the normal range for the testpoint (that is, at the warning, critical, or shutdown stage). For access servers, this notification is defined as the caemVoltageNotification (enterprise MIB OID 1.3.6.1.4.1.9.9.61.2.2).
When the temperature keyword is used, a ciscoEnvMonTemperatureNotification (enterprise MIB OID 1.3.6.1.4.1.9.9.13.3.3) is sent if the temperature measured at a given testpoint is outside the normal range for the testpoint (i.e. is at the warning, critical, or shutdown stage). For access servers, this notification is defined as the caemTemperatureNotification (enterprise MIB OID 1.3.6.1.4.1.9.9.61.2.1).
When the fan keyword is used, a ciscoEnvMonFanNotification (enterprise MIB OID 1.3.6.1.4.1.9.9.13.3.4) is sent if any one of the fans in a fan array fails.
When the supply keyword is used, a ciscoEnvMonRedundantSupplyNotification (enterprise MIB OID 1.3.6.1.4.1.9.9.13.2.5) is sent if a redundant power supply fails.
For a complete description of these notifications and additional MIB functions, see the CISCO-ENVMON-MIB.my and CISCO-ACCESS-ENVMON-MIB.my files, available on Cisco.com at http://www.cisco.com/public/mibs/v2/.
Status of the Environmental Monitor can be viewed using the show environment command.
The snmp-server enable traps envmon command is used in conjunction with the snmp-server host command. Use the snmp-server host command to specify which host or hosts receive SNMP notifications. To send SNMP notifications, you must configure at least one snmp-server host command.
HTH
-Thanks
Vinod
**Encourage Contributors. RATE Them.**

Management of power supplies Macbook Pro

Management of brightness of the display does not work depending on a mode of power supplies. Standard management Adjustment of power supplies Windows XP does not disconnect the display through set time. Control panel NVIDIA: Smartdimmer and Powermizer too do not operate brightness of the display. Macbook Pro, Boot Camp 2.1. Windows XP SP3

I have a question not really related to the original poster.
Is it okay for me to leave my macbook pro plugged into the power addapter 24/7 or will it damage the batter?

Does Dual Power supplies means Load sharing also..

Hi
Wanted to understand how power supply redundancy works in SUN servers .
Is it really 1 to 1 Failback redundancy ( One active and other online but not in use)
or
it is sharing some load ( if yes is it 50% each)
This will help us in making our data center's power requirements.
Pls respond
Thanks
AN

There is no single correct answer.
You will need to read the documentation for each system, model by model.
The manuals will describe how the PSU's function
(independant-with-failover versus N+1 versus 2N+1, etc)
For example, in an E6900 you configure power supplies per physical domain and not per chassis.
Start with the Sun System Handbook.
http://sunsolve.sun.com/handbook_pub
Find the system you are curious about.
Select the "Related Documentation" link on its resource page.
Read whatever is available.

Rack design for two ONS 15454's and two 15540-PWR-AC power supplies...

Looking for advice setting up two ONS boxes with two 15540-PWR-AC power supplies. The manuals/CCO show rack design for just the ONS boxes and a fuse/alarm panel. I have two side by side racks for the gear. Has anyone set up the power supplies for an ONS installation? Any feedback would be great.
thx.
- Ted

Review the AC/DC Power Solution Data Sheet:
http://www.cisco.com/en/US/products/ps6063/products_data_sheet0900aecd801a002a.html
Per the Data Sheet...
The Medium will power 1x 15454
The Large will power 2x 15454
A few things to note...
1. The Power Solution can possibly power more 454s based on the actual power draw of the nodes.
2. There are only 4 circuit breakers on the Large expansion panel. A & B power for 2 454s.
3. It is recommended 454s have 30A fuses/breakers per power source. This can change based on the actual hardware config.
4. You could possibly use the 15A GMT fuses.
5. You could possibly incorporate an external PDU for additional fuses.

20" ALS Power Supplies Faulty?

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