Yamaha RX-E810 No Power Issue: Replaced C8 22nF, Damaged 4 2.2k Resistors & TC4013 Circuit

Question

A typical malfunction of this set is no power. In my case, someone has already replaced C8 22nF. The capacitor is OK, however, 4 2.2k resistors and the TC4013 circuit have been damaged. After replacing the resistors and TC4013 circuit for CD4013 for PLN 2 instead of PLN 60, voltages appeared,...

dybas · Answer

What type did he replace? Capacity checked?

geco · Answer

On the same as it was, i.e. 22nF after I changed to another 22nF and after the advice I put two 47nF. If the capacity was not working, would the power supply not start? and I have 10V and 5V.

dybas · Answer

That's right, except that the capacitor type, apparently, plays an important role. I did not have this model on the autopsy table, according to previous records, there should be polypropylene. Since the equipment does not start, it unfortunately comes out that it is not a capacitor.

sylweksylwina · Answer

Reset protect by entering service mode. Well, unless there is no reaction ... Check the voltage at the switch. Relay trying to turn on?

geco · Answer

As if I have to reset protect, please explain it to me. The relay does not respond and after any short circuit no reaction.

Added after 2 [minutes]:

Maybe someone will explain what the magic of this video is.

https://www.youtube.com/watch?v=NfdCM4HiMTw

I guess dawn dude made a NE555 generator for reset and Yamaha came to life.

Added after 5 [minutes]:

Well, nothing can do without an oscilloscope.

https://www.elektroda.pl/rtvforum/topic2980019.html

sylweksylwina · Answer

You hold preset / band and tuning ^ (MIN) and press the power switch.
If it clicks and turns off then if you know what you are doing (there is a risk of damage to something) then you do the same procedure, only that you hold power for at least 3s. If the processor has all the signals that allow it to start (and is functional), and the front keyboard is also functional, there should be no problem with firing.

In Annex SM, the above procedure is also described on page 10 SM in English.

EDIT:
If the attempt to start fails, write what voltages do you have on this connector:

geco · Answer

Now it surprised me. I started to measure the voltage on TC4013 once again and here 2.5V it turned out that the diode D9 was open. I put on a 10V zenerke 6.3V appeared to me but the same thing strangely floats with a 4.5V reset almost falling to zero and again So there is tension or I am trying to get a job.

Does the motherboard need to be connected to the motherboard.

niedoza · Answer

Good morning

I have been a happy owner of E 810 for over 10 years. For some time, I do not want to turn on either the remote control or the button. For some time, removing the plug from the socket - now not anymore

Could anyone from Warsaw or the surrounding area undertake repairs without ruining me?

thank you in advance for your help

mirektv · Answer

I would like to include one more interesting topic in the subject. The power supply problem in this model is not the only problem in the topic does not start, because there is also a problem with reset. This can be checked simply by unplugging the plug from the stand-by power supply pin the reset should turn on. In my case, the symptom was that at 240V the equipment switched on, but not at 230V. Replacing the C3 capacitor in the reset circuit on the stand-by power supply module helped, I installed 4.7uF for certainty. After this maneuver, it turns on easily at 160V from the network

sylweksylwina · Answer

So it was also a problem with the power supply

[Solved] Yamaha RX-E810 No Power Issue: Replaced C8 22nF, Damaged 4 2.2k Resistors & TC4013 Circuit

Post #1

Post #2

Post #3

Post #4

Post #5

Post #6

Post #7

Post #8

Post #9

Post #10

Post #11

Topic summary