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NO POWER NO VOLTAGE IN SECONDARY POWER CAPACITOR

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Yamaha ca 1000


Probably 60-70 volts. If you need a service manual, I may have one at a cost. For a guesstimate on the voltage, you can check the DC voltage on the large filter capacitors on the filter capacitors following the bridge rectifiers.

Apr 26, 2014 | NAD Audio Players & Recorders

1 Answer

I want to know what is the secondary voltage of transformer inside PC control panel ?


You have not mentioned the details of the machine in question. All you need is to check on the LT ( low voltage side ) of the transformer to find the secondary voltage which will be about 20 to 30 % less than the DC voltage shown on the capacitor on the board. If there are more windings then you can get the primary rewound without any changes to the secondary that must help to solve.

Jan 14, 2013 | Washing Machines

1 Answer

Sylvania tv shrinks the sides


Check its secondary power supply voltage from SMPS power supply. Check the smoothing capacitor connected to secondary power supply voltage, replace it.

Jun 13, 2012 | Sylvania 6420FB 20" TV

1 Answer

Smbs output is low


Check the AC mains rectifier dides/ [stalk]. Replace the main filter capacitor. Rectifier bridge. Rectifier diode at secondary voltage. Filter capacitor for secondary rectifed voltage.

May 19, 2012 | Televison & Video

1 Answer

I NEED POWER SUPPLY BOARD FOR DRC8030N


I am sure that the fault was relative of the bad capacitor and swapping the working board has proved. Hope that solves the issue as all what is needed is to check and replace all the suspected capacitor is the Primary /Secondary side as the SMPS is working BUT with a limited voltage. So the threshold is low and so can be a tank capacitor, change the mains capacitor and also the secondary +B side.

Dec 02, 2011 | RCA DRC8030N

1 Answer

Power supply output for Yamaha p4500 secondary output for the power supply so that i could check the voltage


Hi Joel, although we've sourced detailed schematic for this P4500 amplifier, there are no many voltage details on it for manufactures sake. Anyway, mine findings are. Secondary winding on main transformer should supply no less than 2 x 75 volts which makes after rectifying and filtration no less than 2 x 90 volts on capacitors with amplifier without input signal. Also transformer has to be very "hard" , otherwise amp will start clipping before reaching stated wattage on output.

Oct 17, 2011 | Yamaha P4500 Power Amplifier 2-Channel

1 Answer

When you press the power switch - power - only switch, the relay is opened again and the unit will not start.


check the secondary power supply the voltage regulator and the filter capacitor..i have encounte such prblem and found the filter capacitor is is leak almost shorted..hope it help

Apr 30, 2011 | Aiwa AV-D97 Receiver

1 Answer

Model 27LCDB03B-simply appears to be "dead" won't power up-not the fuse


Hello Chris, Hi, your TV's power supply section is not functioning properly. If the fuse is in good shape, then the auxiliary power section of the power supply is not functioning, this section powers the switching oscillator and IC that sends the pulse to the switching element like power transistors to create a main secondary voltage. the main secondary voltage is the circuit that produces all voltage needed source by the TV. what you can do if you are up to it.
A. Visualize any bulging capacitors, replace them. B. Measure the voltage across the following section in particular order so we can find the faulty parts.
  1. the AC input on the Power supply board. (none means open switch or power cable)
  2. the AC after the line filter circuit. (none means open line filter)
  3. the DC on the filter capacitor. (none means problem on the rectifier)
  4. then the AC on the switching element or input on the main transformer. (most likely you won't have any voltage reading hear.)if you do have continue.... (none means you scratch your head, this is the hardest part) check all low value resistors, high wattage resistors open or shorted diodes.
  5. the dc on the secondary filter capacitors.
If not have this checked by a technician, its to complicated for you.

Mar 12, 2011 | Thomson Televison & Video

2 Answers

Fujitsu Siemens Premium Line P17-1 17" LCD Monitor. When the monitor is turned on, you can see the Fujitsu Siemens logo for half a second, then the screen goes black. (LED stays on) The monitor...


Monitor ia having a problem with Voltage filtration... Replace the electrolitic capacitors at secondary side of power board, There are 2 voltages, 12 V and 5V...each of them has few electrolitic capacitors in line, replace them, watch the polarity and all works...Cause of eletrolitic capacitors on secondary side may be the one little capacitor in the primary side, becarefull there is some high voltage out there

Dec 11, 2010 | Fujitsu Siemens Siemens Premium Line P17-1...

2 Answers

190G Monitor fix or new one needed?


Sounds like an inverter problem. If the power supply is internal replace the capacitors coming out of the voltage regulators. These are usually 1000mf and/or 470mf. If that doesn't do the trick look up the numbers on the 8-pin chips that drive the secondary transformers on the inverter to see if they are getting the right voltages.
Good Luck!

Feb 17, 2008 | Computers & Internet

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