Question about Enhance Technology ENP-1815, ENHANCE SFX 150W 1U Rackmount Power Supply (ENP1815) Power Supply

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No power out/ cooling fan not working

Replaced filter cap's in dc output, still no output

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Computer smps not work properlly what problem


More than likely a bad voltage power rail, balanpv38.

Also more than likely caused by bad Electrolytic Capacitors inside the Switched-Mode Power Supply.

Radial Aluminum Electrolytic Capacitors.

Capacitors in the Output Stage, more than likely.

Capacitors are used as Filters, and Voltage Regulators. In the Input Stage of the SMPS they are used as voltage regulators. In the Output Stage they are used as filters.

Filter the rectified AC voltage, which is now DC. They make the DC voltage 'clean'. No ripples, clean DC voltage.

http://en.wikipedia.org/wiki/Switched-mode_power_supply

The two large blue sleeved Radial Aluminum Electrolytic Capacitors, you see marked with the letter B, can store Up To 100 Volts.
They are in the Input Stage.

IF, your fingers touch the terminals (2) on the bottom of the capacitor/s, YOU could receive the stored charge. Result is a Bad shock to FATAL.

IF, your fingers complete a circuit, that one or more capacitors are in, YOU could receive all of their stored charge. Result is a Bad shock to FATAL.

Capacitors need to be PROPERLY discharged before working on the unit.

This is hwy I cannot guide you in this endeavor. I will not guide you with the slightest possibility of you getting hurt.

Suggestion is to replace the Power Supply.

What can make a Power Supply go bad?

1) Low quality electronic components inside.

A) Low quality Radial Aluminum Electrolytic Capacitors
B) Low quality Power MOSFET/s
C) Low quality Rectifier Bridge
D) Low quality wiring due to the gauge of wiring used is too small.

2) Power Supply, (And inside of computer), is dirty inside.

An SMPS (Switched-Mode Power Supply), has two cooling components inside;

Heatsinks, and a small internal fan.

In the Wikipedia link of the open SMPS above, there are two Heatsink's used in this particular example;

One is in-between the letters B and C, and one is in-between the letters C and D.
Rectangular finned shapes connected by a vertical bar.

The Heatsink absorbs heat from whatever object it is placed against.
The rectangular shaped fins absorb the heat, then radiate it away.
The small internal fan's air flow helps carry heat away from the fins.

If in-between the fins, and around the fins, is clogged with 'Gunk', the cooling capacity drops Tremendously.
('Gunk' = Dirt, dust, lint, hair, etc)

Heat = Wasted Energy
The Power Supply cannot keep up with the call for power, and components inside the Power Supply fail.

Regards,
joecoolvette

Sep 03, 2012 | Computers & Internet

1 Answer

Canon ImageRunner 330s Error E805, Can't Enter Service Mode


FM1 Heat discharge fan Cools fixing unit.E805 0000 Fan failure
only one in this copier>
The fan is faulty. -
Check the fan connector.
- Replace the fan.
- Replace the DC controller PCB.


Switching between full-speed rotation and half-speed rotation is controlled as described below.
1) Full-speed control
When the CPU on the DC controller outputs a fan full speed signal (FAN_FULL), the fan drive voltage switching circuit supplies a +24 V fan drive voltage to turn
the heat exhaust fan at the full speed.
2) Half-speed control
When the CPU on the engine controller outputs a fan half speed signal (FAN_HALF), the fan drive voltage switching circuit supplies a +16 V fan drive voltage to
turn the heat exhaust fan at the half speed.

E805-0000 (Main body fan error)
When the cooling fan of the main body starts, the fan lock detection signal (FAN_LOCK) has been held at the "H" level for longer than the prescribed time.

also check your low-voltage power supply

Apr 22, 2012 | Office Equipment & Supplies

1 Answer

My copier is having a system error E-805


E805 0000 Fan failure
only one in this copier>
The fan is faulty. -
Check the fan connector.
- Replace the fan.
- Replace the DC controller PCB.


Switching between full-speed rotation and half-speed rotation is controlled as described below.
1) Full-speed control
When the CPU on the DC controller outputs a fan full speed signal (FAN_FULL), the fan drive voltage switching circuit supplies a +24 V fan drive voltage to turn
the heat exhaust fan at the full speed.
2) Half-speed control
When the CPU on the engine controller outputs a fan half speed signal (FAN_HALF), the fan drive voltage switching circuit supplies a +16 V fan drive voltage to
turn the heat exhaust fan at the half speed.

E805-0000 (Main body fan error)
When the cooling fan of the main body starts, the fan lock detection signal (FAN_LOCK) has been held at the "H" level for longer than the prescribed time.

also check your low-voltage power supply

In case of a problem or clarification or my solution was insufficient, don't hesitate to post me a reply.

If you are satisfied, rate my solution with the "thumbs" or (even better) add a testimonial.

May 31, 2011 | Canon iR 2016i Black and White Copier

1 Answer

MY PRINTER hp laserget 4250 dtn is displaying 57.4 error when I turned it on, what can I do? I am ofetn requested to suitch off and then to switch on but it fails to mark " Ready"


57.4 Main fan error

Hi I hope this will help

The text come from the hp manual

good luck Ian




Q2431-90912 Chapter 7 Troubleshooting 287

57.X

PRINTER ERROR

To continue turn off then on

or

57.3

EP FAN FAILURE

or

57.4

MAIN FAN FAILURE

A printer fan is not functioning.

X Description

3 EP cartridge fan, right side

(LJ 4300 only)

4 Main cooling fan, left side

Turn the printer off and then on.

57.3 Cartridge fan error (F2)

1. Reconnect the connector

between the fan and the

DC controller PCA

(location J78).

2. Replace the fan. See "Cooling

fan (right side;

HP LaserJet 4300 series

printer only)" on page 170.

3. Replace the

DC controller PCA. See

"DC controller PCA" on

page 181.

57.4 Main fan error (F1)

1. Reconnect the connector

between the fan and the

power supply.

2. Verify that the ribbon cables

are fully seated in the

connectors on the

DC controller PCA.

3. Replace the fan. See "Main

cooling fan (left side)" on

page 168.

4. Replace the power supply.

See "Power supply" on

page 188.

5. Replace the

DC controller PCA. See

"DC controller PCA" on

page 181.

57.7

DUPLEX FAN FAILURE

The cooling fan in the optional

duplexer is not functioning.

1. Turn the printer off and then

on.
2. Replace the duplexer.

Mar 25, 2011 | HP LaserJet 4250dtn Printer

1 Answer

Dear Sir, I have astec model AA23160 power supply input Ac 100-240 5A max output Dc +5v 23A, +12v 22A max it does not give output the LED give yellow when it is ON. the two cooling fans were also not...


Hi! l have have the same problem whit the Asctec model AA23160 power supply.But l need to know how many time your power supply worked: How many time do you use it?
Thank's!

Aug 13, 2010 | Astec 300w AT Power supply 190170-01...

1 Answer

Is this a good amp


I classify this as a sleeper of the car audio industry. it is powerful, well built, cheap, feature laden, sounds great! very comparible to the big names such as kicker, alpine, fosgate an all the rest. i would prefer this amp over any of them any day of the week! here are the specs for it incase u didn't have them.
  • Max. Power Output: 800W x2Ch.= 1600W @2 Ohms
  • Power Output:
    • 330W x 2Ch.(@2 Ohms) Less Than 0.5% THD
    • 220W x 2Ch.(@4 Ohms) Less Than 0.3%THD
    • Bridge: 660W x 1 Ch.(@4 Ohms) Less Than 0.5% THD
  • All Measurements Done @ 14.4V DC, 1 KHz Input Signal.
  • Dual VU-Meter
  • Dual Fan Cooling System.
  • LPF (Low Pass Filter) Variable 30Hz-250Hz
  • HPF(High Pass Filter) Variable 50Hz-l KHz.
  • Slope Adjustable 12-24dB.
  • Variable Bass Frequency(30Hz-120Hz).
  • Variable 0-18db Bass Boost.
  • High & Low Adjustable Level Input.
  • Dual LED Indicated Power Status (Protect/Power).
  • Mosfet DC-DC Switching Power Supply.
  • Built-in Protection Against Short Circuit, High Temperature & Overload.
  • Auto Power On/Oft By Remote (+12V).
  • Dimensions(mm) : 300(W) x 57(H) x 697(L)

Apr 04, 2010 | Rockwood 4224RTX Car Audio Amplifier

1 Answer

I need a replacemant power supply for my printer. Where can I get one?


HP doesn't have a replacement power supply available, and to my knowledge there is no replacement power supply available.
The power supply itself would have to be rebuilt.

More than likely if it's the power supply, and not the fuse in the power supply area, (Behind the plate with the two Number 10 Torx screws. BE SURE, the printer is unplugged from power!), it's an Electrolytic Capacitor, or two that have gone bad.

Electrolytic Capacitors are Filters used in a power supply.
In the Input stage of the power supply, they filter the incoming AC electricity, before it reaches the rectifier.
In the Output stage of the power supply, they filter the rectified DC electricity into true DC electricity.

Look to see if you have any bulging, or leaking 'Caps'. You have to use the same voltage, but you can go slightly higher with the Microfarad's. (mf)

Example: I replaced two 16 volt, 330mf 'caps' with two 16 volt, 430mf 'caps'.
('Caps' = Electrolytic Capacitors)

More info to help identify bad 'Caps'.
http://www.capacitorlab.com/visible-failures/index.htm

Jul 07, 2009 | HP PSC 2210 All-In-One InkJet Printer

3 Answers

Teac stereo receiver model # AGV8520


One or more output channels has dc voltage present or the protection circuit itself is at fault. Protection ckt keeps speaker destroying DC from reaching the speakers. Connect a dc meter before the speaker relay(s) to isolate which channel if any, is bad. The protection ckt has a small value electrolytic cap connected to the power supply that needs to be checked. Small so that as soon as power is turned off the relay(s) release. This cap will fail causing this error. Measure the AC ripple across this cap, over a couple volts, replace. Also this error could be caused by a missing supply. Inspect all heat sinked parts and other parts for bad connections.

Nov 05, 2007 | Teac AG-V8060 Receiver

14 Answers

Overheating?


I know this post is pretty old, but I just came across it. I have a GTP-750 that I have fixed. They do run extremely hot which causes the rectifiers in the power supply to fail. I have the rectifier part numbers to fix it as well as cooling method. I have been running mine now for about a year after fixing it sometimes at high levels for extended amounts of time and the case is now barely warm. If you need advice or pictures of my setup send me an e-mail

Jun 29, 2006 | Technics SA-AX720 Receiver

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