Receiver power problem

C447 Error - Heater lamp abnormality after abnormality judgment (temperature abnormality at ready status)

Power voltage Check if the power voltage is normal.(Is the voltage during the operation ±10% of the rated voltage?) Thermopiles • Check if the fuser belt center and side thermopiles (front, rear) are installed properly. • Check if the harnesses of the fuser belt center and side thermopiles (front, rear) are open circuited. Power supply unit and fuser unit • Is the fuser unit installed correctly? • Check if the heater lamp is broken. • Check if the connector of the heater lamp is disconnected. • Check if the thermostat is blown • Check if the connectors of the power supply unit are disconnected (power supply unit AC output connector CN408, CN409 and LGC I/F connector CN404 CN405). • Check if the power supply unit is abnormal. LGC board • Check if the connectors CN333, CN345 and CN361 are disconnected. • Check if the conductor pattern on the LGC board is short circuited or open circuited. Status counter After repairing the matter which caused the error [C411/C412], perform the following: • Turn ON the power while [0] and [8] are pressed simultaneously • Key in "2002", then press [START]. • Change the current status counter value "1 " or "2 " to "0", then press [OK] or [INTERRUPT] (to cancel [C411/C412]). • Turn the power OFF and then back ON. Make sure that the equipment enters the normal ready state.
5 Clear the status counter Change the current status counter value (08-2002) "3", "5", "6", "9", "19", "21", "22", "23", "24", "25", "27", "29" or "32" to "0" for [C44X], taking the same procedure as that for [C41X]. * The status counter value is as follows in the following cases. - The error occurred during warming-up: "3", "5" or "6" The error occurred after the equipment has become ready: "7". - The temperature detected by the fuser belt center thermopile is 220°C or higher, the temperature detected by the side thermopile is 230°C or higher or the temperature detected by the front thermopile is 250°C or higher: "9", "19", "21", "22", "23", "25", "27" or "29" - The error occurred during printing: "24" or "25". - The error occurred during energy saving: "27". - A paper jam occurred: "29".

The high voltage output is a transient wave form ?
The fence would have a certain resistance
the voltmeter may not have the same resistance.
if the output energiser resistance is not matched by the volt meter's resistance then the maximum power transfer will not be achieved. If the fence resistance is matched to the energiser output resistance then maximum power transfer will occur.
https://en.wikipedia.org/wiki/Maximum_power_transfer_theorem
if a transisient wave form is generated the voltmeter won't read the AC voltage as it is not a sine wave .
The high voltage on the fence conductors may be present in the form of intermittent pulses of short duration, or as a continuous AC or DC voltage.
https://patents.google.com/patent/US7893521

NO,NO,NO ! Fuses are electrical protection for the cars wiring installing a higher amp-age fuse takes longer to blow so your wiring gets hotter and starts to melt the insulation and shorts to other wires eventually burning up the harness. With a amp meter test the circuit to see how much power is needed to keep the circuit going if over rated (15 amp circuit taking 20 amps) then install a cycling circuit breaker 10 amp this will blow and cool and blow again continually then with a magnetic amp meter (Gauss meter) you can locate your short the source voltage causes the amp meter to jump as the fault occurs when you pass it meter will stop working.

Check the speaker wires for shorts or damage. If none, the amplifier has faulted and will likely require service to restore back to normal working condition.

A spike is an increase in voltage for 1-2 nanoseconds.
A surge is the increase lasts 3+ nanoseconds.

e 3 is error because of high voltage may be more than 30 kW at your house......it will not work with it u have to buy a voltage regulator for it........

Decibels correspond to the output voltage being sent to the speakers. In your case, the voltage is reached at -40dB is the threshold that causes whatever is happening to operate the receiver's protection circuit. You might have a bad speaker, with a voice coil that shorts at the higher voltage. Below that level it's okay, but at the magic point the insulation breaks down, and that's when the receiver sees trouble.

You might try connecting only one speaker at a time using a short length of wire other than your current ones. If the trouble occurs on one speaker only, you've found the culprit. If the receiver operates normally on each speaker, try reconnecting one speaker at a time to determine if one of the speaker wires may have a short somewhere. There might be a weak spot in the insulation, not causing any trouble until the voltage is high enough.

If the receiver still goes into protection with just one speaker, there's an internal problem. Some part in the amplifier may be breaking down at that voltage. Or a part value has changed, causing the protection circuit to kick in even though there's really nothing wrong. Bad solder connections may have developed. Unfortunately, this kind of problem usually needs the services of a shop with the equipment and circuit information to figure out what's happening. If you can find a Yamaha-authorized warranty servicer, they might already know some typical causes if they've seen units with the same trouble.

Try the speaker test first. Then let a shop tackle the receiver if it looks like that's where the fault is. Good luck and thanks for using Fixya!

Micro wave as the name suggests produces heat when the micro waves aimed at an object causes the water molecules inside the object to vibrate hence producing heat.The gadget responsible is the magnetron. If your magnetron is not receiving ht voltage or receiving but faulty, then your micro wave wont work please take precaution when opening micro wave due to high voltage caps that remain charged sometimes even when it is off.check the high voltage fuse/ diode and capacitor if they are fine and the step up trans former o.k then the only option is to replace the magnetron

Those voltage readings MAY be normal.

The AC waveform may cause your meter to read inaccurately. You would need to use a TRUE RMS meter to accurately read the voltage.

The siple meters actually read the AVERAGE voltage and then are calibrated to mulltiply it by the "form factor" for a sine wave. OFTEN these generators don't produce a clean sine wave. A square-ish wave will read higher on the garden variety meters.

Compare the brightness of a lamp comparing to when run on your utility.

The frequency depends on engine speed ... yours is running a bit fast...check it under at least half load and if off, adjust the govenor slightly.

Tom, Not sure if what you're asking relates to the Maximum electrical energy (Voltage and Amps) that can occur during a short circuit through a properly protected electrical circuit (protected by a circuit breaker, etc.) or if the question is for the maximum amount you could potentially get from a short circuit on a 230V or 400V electrical line to ground OR another electrical line/supply.

IF the circuit is a 230V-AC circuit protected by a double circuit breaker, you could see the entire Voltage (230V-AC) and up to the full Ampere rating of the circuit breaker, (20, 30, 40, 50, etc Amps) during a short circuit condition to Ground.

IF the circuit is a 400V-AC circuit protected by a double circuit breaker, you, again, could get the entire Voltage (400V-AC) and up to the full Ampere rating of the circuit breaker protecting the circuit, when shorted to Ground.

Now, IF the short condition involves one of the above line voltages AND you are having it shorted against another Voltage/Amp circuit, the total potential Voltage and Amps you could experience, would basically be the sum of the two Voltages (and Amps) of the two (2) circuits being put into a short condition. So you would/could see a potential short circuit of whatever voltage is available, depending on what and where the short circuit is occurring.

By way of example, I've seen a 240V-AC 60 Amp circuit shorted to another 240V-AC 60 Amp circuit and the resultant "short condition caused enough damage, due to the voltage and Amps provided, to melt and weld the machinery's electrical connections, rendering the unit a total loss, not to mention that the person that caused the short to occur, received a face-full of melted copper metal bits all over their face and body. Thankfully they were wearing safety glasses, and their eyesight was saved, albeit, with some temporary blindness caused by the extremely bright flash and explosion.

The examples provided assume a properly working/functioning circuit breaker protection. However, if the circuit breakers are faulty, it is possible to recieve much higher vlotages and Amps, since there would be no protective circuit breaker that could trip the power off. In that case, the Main circuit breaker becomes the fail-safe protective device and that could have a much higher Amp rating, thus the maximum Voltage/Amps would be limited by the Main electrical ciruit breaker and electrical supply available at the location where the short circuit occurs.

This could be MUCH higher Voltage and extremely high Amps, depending on the situation and equipment involved.

If you have more information about the particular situation, please post a follow-up comment and I'll provide you with some more info.

I hope you find this Very Helpful and best regards!