Sennheiser Ew100/G2 Wireless Mic Receiver

[falcontech]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

without fuse on the board I have a variation only on TP209 = 0 and on TP229 = 43.7

[falcontech]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

the original fuse has not yet arrived, and I don't have a classic fuse with that amperage to be able to test, if I try with a 2.0 ampere one, can I do some damage?

[budm]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

Tp209=28,1 kohm
tp208=00,5 ohm This is circuit GND, BM.
tp226=17,47 kohm
tp229=44,6 kohm
tp233=7,19 kohm
tp231=12,96 kohm

TP208 is GND.
Those test points look OK, no really low Ohms readings.

[falcontech]

Re: Ricevitore microfono wireless Sennheiser Ew100/G2

TP208 is GND.
Those test points look OK, no really low Ohms readings.

So what do I do? Am I waiting for the original replacement of the fuse or can I try in the meantime with the classic 2 amp fuse?

[budm]

Re: Ricevitore microfono wireless Sennheiser Ew100/G2

So what do I do? Am I waiting for the original replacement of the fuse or can I try in the meantime with the classic 2 amp fuse?

You do not have 1A fuse?

[falcontech]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

i don't know should i look, in case it would be better by 1 amp?

[budm]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

i don't know should i look, in case it would be better by 1 amp?

The bad fuse is rated at 3/4A so using 1A fuse is close enough, 2A will be too high in case we may have active shorts when does not show up when we did the static test on those power supply test points.
So get 1A fuse to try.

[falcontech]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

paradoxically I don't have a 1 amp fuse I have to wait for Monday to buy it

[falcontech]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

The bad fuse is rated at 3/4A so using 1A fuse is close enough, 2A will be too high in case we may have active shorts when does not show up when we did the static test on those power supply test points.
So get 1A fuse to try.

I put the fuse he indicated to me and everything seems ok, the receiver has been on for about an hour and shows no signs of problems, I tried with a non-original power supply, because its original supplies 19 volts instead of 13,5 as the label states and it worries me a little, do you advise me to buy a new original power supply?

[budm]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

Is'n this the power supply you are using?
https://www.badcaps.net/forum/attach...8&d=1595935465
It is just a simple AC -DC power supply, non-regulated. It will put out 13VDC at 0.250A, at lower current draw the Voltage will be higher. You see 19V when there is no load connected, the output will also vary with the AC line Voltage.
If you want to be safe you can use AC-DC linear power supply that will regulate the output Voltage, you do not want to use Regulated switching power supply since it is noisy.
So when is the Voltage at the DC jack on the fuse when the unit is off (minimum load), is it still within the safe operating range of the unit?

[falcontech]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

As I told you I used another power supply for safety which is Ac / Dc 13.5 stabilized 800mA, and not the original one that is in the picture, I understood that the original power supply when it has no load delivers 19V, for the rest if could you explain me better why I did not understand, it is a bit difficult to understand when I use the translator thanks

[budm]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

As I told you I used another power supply for safety which is Ac / Dc 13.5 stabilized 800mA, and not the original one that is in the picture, I understood that the original power supply when it has no load delivers 19V, for the rest if could you explain me better why I did not understand, it is a bit difficult to understand when I use the translator thanks

Right now it is best for you to buy the original power supply that was made for this unit.
BTW, I did not see the picture of the 13V 800mA power supply you are using, I only see the Sennheiser one you show here. https://www.badcaps.net/forum/newrep...reply&p=977380

[budm]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

BTW, did you do this test in my post #50?
"So what is the Voltage at the DC jack on the fuse when the unit is off (minimum load), is it still within the safe operating range of the unit?"
What is the Voltage at the fuse (with ref. to Ground of course) when the unit is turned on?
According to the spec sheet of the unit, the operating Voltage range is from 10.5V to 16V.

So the bottom line is that when the unit is OFF (power supply will see little load) the Voltage at the fuse should not be higher than 16VDC, when the unit is turned on (power supply will see heavier load), the Voltage should not be below 10.50V.

https://www.repairfaq.org/sam/aapsfaq.htm

[falcontech]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

Power supply connected to the jack without load = 17V
With load = 14.50V

[budm]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

So you are on the border line, 17V instead of 16V maximum per unit safe operating Voltage. That Voltage can go even higher that 17V if your AC line Voltage goes even higher.
I would get the correct power supply for the unit.
Is the original one expensive?

[falcontech]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

The original costs 28 euros with shipping

[falcontech]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

Thank you all for your assistance and patience, the wireless microphone has been tried out in public and works perfectly, thank you very much

[budm]

Re: Sennheiser Ew100/G2 Wireless Mic Receiver

Thank you all for your assistance and patience, the wireless microphone has been tried out in public and works perfectly, thank you very much

Thanks for the follow-up.
28 Euro for a simple power supply? Expensive!