Question about Pyramid 10 AMP 13.8V POWER SUPPLY Car Audio Amplifier

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I have a 13.8 dcv 20a power supply transfomer, but the voltage outpu has drop on 9.5dcv only, i check the transformer ac output it have a 15.5acv and i check again the voltage going through out the bridge diode it have a 29.5dcv, but im wondering why the voltage output is only have 9.5dcv, is any spare parts have to change??? or is there are have any modifying have to do for it????

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There should be a voltage regulator in that circuit. it has failed or a component that provides the "trigger" voltage has failed. possibly a zener diode.

Posted on Sep 27, 2010

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How to measure Voltage in Transforme for Fitness Treadmill


Transformer Test Procedure:1). Make sure that transformer wire connections (CON1) to the drive board are secured. Turn unit on.2). Put multimeter to the AC voltage setting. Insert meter probes into the transformer primary (red)wires as shown. Normal reading: 110V. This shows that there is power to the transformer.3). Test transformer output by probing on secondary (output) wires: black and black, white and white,orange and orange, yellow and yellow

Transformer Test Results :1). If there is no voltage across the primary (red) wires, inspect F1 fuse on the drive board and power to the drive board. 2). If there is voltage across primary wires but none across secondary wires, the transformer is bad.Replace it.

Transformer Wire Colors Normal Voltage Value:
Red and Red 110 VAC.
Black and Black 11-13 VAC
White and White 11-13 VAC
Orange and Orange 27-29 VAC
Yellow and Yellow 10-12 VAC
_0.png

on Oct 26, 2011 | Exercise & Fitness

Tip

How to measure Voltage in Transformer for Fitness Treadmill


Transformer Test Procedure 1). Make sure that transformer wire connections (CON1) to the drive board are secured. Turn unit on.2). Put multimeter to the AC voltage setting. Insert meter probes into the transformer primary (red)wires as shown. Normal reading: 110V. This shows that there is power to the transformer.3). Test transformer output by probing on secondary (output) wires: black and black, white and white,orange and orange, yellow and yellow.

Transformer Test Results:1). If there is no voltage across the primary (red) wires, inspect F1 fuse on the drive board and powerto the drive board.2). If there is voltage across primary wires but none across secondary wires, the transformer is bad.Replace it.


Transformer Wire Colors Normal Voltage
ValueRed and Red 110 VAC
Black and Black 11-13 VAC
White and White 11-13 VAC
Orange and Orange 27-29 VAC
Yellow and Yellow 10-12 VAC
.png
ERNESTO CUADRA

MANAGUA, NICARAGUA. C.A.

on Oct 26, 2011 | Exercise & Fitness

1 Answer

MY RCA 27" WILL NOT TURN ON, HAVE POWER TO THE FUSE, THE FUSE IS GOOD ALSO BUT THE DEGAUSS RELAY DOES NOT CLICK AND NO OTHER CLICKS ARE HEARD EITHER, WHAT COULD BE WRONG?


you need to check the voltage output of your power supply section.This power supply supply is a switching type power supply.there is a chopper transformer in there.its supply is a dc voltage unlike any other transformer which is AC supplied on the primary..First step.
1.Using a multitester measure the primary supply it is a DC voltage around 220v - 110 VDC
2.Measure the secondary output.The out put is AC voltage the supply for the B+ going to plyback is 115vdc the second output is 12v run through a regulator and the regulator lower the voltage to 5vdc.this 5vdc supplies the system IC and the jungle IC.this ic process the switching of the plyback transformer and the plyback transformers output supplies the voltage of the whole system including your relay in the degaussing section....once the plyback is activated the tv will now turn on...

good luck!Hope i helped you..

please rate my help..god bless!

Jun 13, 2010 | RCA F27641BC 27" TV

1 Answer

How many parts in transformer & briefly explained


Firstly - DANGER.Power can kill so be very careful.
These can be made of a couple of parts but are sold as one peice.Check your manufacter for more info.

How Magnetic Iron Core Transformers work........
the transformer has a pair laminated wires normally copper or iron core wrapped around in a tight coil called windings.they are independant circuits not electrically connected together(x2 wires = 2 Circuits)
this creates a magnetic effect when power is applied to one end and mutual inductance creates a power output at the other end.Like a magnet really.

There are some transformers that have a multi voltage outputs called TAPS which will have different voltages to the input voltages.

ie
Input in New Zealand can be 230volts
Output can be 12 volts or 5 volts or 230volts
depending on the applications required,
for example

Street Transfomers can be 11,000 volts INPUT stepping down to 230volts.OUTPUT for your household power
or
Garden lighting transformers output can be 12volts but still be 230volts input
or
computers power packs can be multi voltage outputs of 12 volts,9 volts,5volts but still 230volts input.

There are also Electronic Transformers available too.
Commonly used for dichrioc Halogen downlights in homes or the office,

Apr 26, 2010 | Sunbeam Transformer (ICTRBA) ATX Full...

Tip

How to measure the voltage on TV


Voltage measured on DC scale, black cable multitester / avometer put on a negative path or can be slipped on the silver wire in the tube that is not disposable wrapping.

Next, measure the voltages are available:
  • For 180v voltage can be measured on the positive pin elco (10uf/250v) in PCB RGB tube.stick pin red wire multitester
d3f355a.jpg
  • Voltage 110v for TVs 14 "-21" and 130v for 25 "-29" in the B + FlyBack Transformer (FBT), find the path there is elco 100uf/160volt. measure on a positive foot elco.
  • For 12volt voltage, please measure at the foot of the right edge of IC 7812.
534aece.jpg
  1. For voltage 5V, please measure the right foot of IC 7805.
  2. For voltage 33v, please search at the foot of VT in tuner.
  3. To measure 90v-300v, scale use DCV 250.
  4. To measure the 12v-40v, use a scale of 50 DCV
  5. To measure the voltage of 1V-9v, 10 DCV-scale use.
  6. How to measure the voltage on the yoke and in plyback is;
    • From the yoke horizontal = Fcc 110v DC, 1000 V. AC voltage can be removed with a red plug in output and in use as dB meter.
    • From the yoke pertikal 24 DC current model, except for disposable coupling C = 1 / 2 Fcc. While it could be IC 120V AC (with dB meter)
    • At Fcc FBT kolector; 110v DC, AC voltage = 1000 V..
    • At Fcc FBT filement / heater = 5V-5, 5V AC.
    • In the FBT 20-32k anode voltage V measured with 40kv HV probe is added to the multitester 1000 V. DC.
    • Voltage others depending on model and type of TV. 180v out there (for RGB) directly from the regulators, transformers, Video Amp taken from FBT.
    • There are 24V and 46v vertical FBT, also 12-18V depending on brand and type.
    • Voltage 600 V DC and focus around the screen 400v DC.

    Thus tip n trick from me (AGUS YUSTIARA ), hopefully useful.
for more info , at http://trend2download.blogspot.com


on Aug 16, 2010 | Televison & Video

1 Answer

Power supply/ no output voltage


Actually i haven't fixed the problem as yet but i did find some info that would help me to fix problem.
I went to google and entered keyword,,, Electronic parts,,there came up a page,,and i went to several manuf sites till i found a replacement transformer,,then i disassembled the power supply and am now waiting for a replacement transformer.

Sep 21, 2008 | Boston Acoustics MicroMedia Computer...

2 Answers

Pyramid 14G power supply


Hi.
It very unlikely the voltage went down. I think you should re measure what the voltage should be yes it 13 volt is after the bridge you wil get this with dual 6.5 volt ac from the transformer, they don't change voltage unless you have a short at the output, and if you did you will blow the transformer, is your reading from 2 wires or is it three wires, output, the center to the end should be 6.5 and end to end maybe 13.8.
I would need to see the schematic to know what voltage you should be getting.
I wouldn't look on a bat transformer but ether, bad bridge or wireing.

I hope this help's

What About Bob

Feb 10, 2008 | Audio Players & Recorders

2 Answers

Power supply gigaset 8825


The power supply for the 8825 base is to be 13 volts AC, rated at 850 milliamps or higher. You can go anywhere from 13 up to 15 volts without hurting the unit, and a higher current rating is even better. We actually make them ourselves through bulk purchases of varieties of power supplys. Your next delimma will be the plug size, it is a pretty common size, most universal adapters will have the right size of the outer and inner connections.

Nov 16, 2007 | Siemens Gigaset 8825 Cordless Phone

1 Answer

Will not turn on.


  • proceed as given after your power supply is ok (your statement)
  • isolate power supply from h/output stage.
  • check diodes & capacitors connected with flyback transformer.
  • check for print short.
  • ckeck h/output transistor.
  • connect supply to h/output stage.
  • put on the set.
  • hope this will help.
  • good luck

still there is a drop in voltage then your fly back transformer faulty.

 

Oct 12, 2007 | RCA F32450 32" TV

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