Ceramic resonator markings

[starLED]

Can someone explain me what does markings on ceramic resonator mean?
I have blue ceramic resonator with marking 400G-945

 

[Nigel Goodwin]

It might mean nothing, and just be an in-house reference number.

But if you're talking about the resonator in your remote control, they are usually around 455KHz

 

[starLED]

Yes, I am looking at resonator in remote.
There isn't such resonator 455 KHz in my electronic shop, there are from 3.58-12 MHz, can they be used?

 

[hexreader]

My guess (and only a guess) is that the number 400 means 400KHz. As Nigel says, 455KHz is the popular value, but I reckon your device is probably 400KHz.

G may be tolerance, temperature range or something else.
945 may be relevant to manufacturer only, maybe date code, probably unimportant.

How about a clear picture so we can see manufacturer logo and number of pins?

3.58-12 MHz, can they be used?

NO!

 

[starLED]

There isn't a logo, just marking 400G-945

 

[hexreader]

Google search turns up nothing similar for 3-pin resonators - have to give up there.

Failures are rare, other than bad solder joints or mechanical damage. Cannot see solder joints, but looks mechanically good (no cracking of blue coating)

Do you have an oscilloscope with 10x probe to check each outer pin (centre = common) with battery connected?

 

[starLED]

No.

 

[Nigel Goodwin]

Yes, I am looking at resonator in remote.
There isn't such resonator 455 KHz in my electronic shop, there are from 3.58-12 MHz, can they be used?

No, fairly obviously - imagine you need an object that's 455cm to fit in a particular 455cm hole - why would you imagine an object that's 3580cm or 12000cm fit in the same hole?.

You're unlikely to find a suitable resonator in a store, but you're also VERY unlikely to need one - they don't fail.

In my previous career as a TV service engineer I've repaired many hundreds, probably thousands?, of remotes - the only faulty resonators I've found were from dropped remotes, where one (or more) of the pins have snapped off due to the physical shock. Repairs consisted of either soldering a piece of wire to the snapped pin (you can 'mostly' find enough to solder to), or fitting a replacement resonator from a scrap remote - they all seem to be pretty identical.

 

[starLED]

I don't want to replace it, I was just curious to understand markings.

 

[gophert]

I don't want to replace it, I was just curious to understand markings.

Did you figure out what's wrong with the remote?

 

[rjenkinsgb]

It appears to be a Murata 4MHz one, this series.
(They use the same picture regardless of frequency).

4(.)00 MHz, the last three digits a date code, a year ending 9 & week 45 of that year.

https://uk.farnell.com/murata/cstls4m00g53-a0/resonator-ceramic-4mhz-thd/dp/2443271

 

[starLED]

Did you figure out what's wrong with the remote?

Yes, it was broken trace.

Trying to fix remote for Sony TV

I have tried to determine why is my remote for Sony TV broken, but I can't quite figure it out. I have tested almost every component with multimeter, they seem to be ok. I suspect that chip 34286g2 could be faulty, I tested all leads and they show 700 ohms resistance, but maybe something else is...

www.electro-tech-online.com

 

[starLED]

It appears to be a Murata 4MHz one, this series.
(They use the same picture regardless of frequency).

4(.)00 MHz, the last three digits a date code, a year ending 9 & week 45 of that year.

https://uk.farnell.com/murata/cstls4m00g53-a0/resonator-ceramic-4mhz-thd/dp/2443271

There isn't M letter, there as a dash instead.

It is 4.0 MHz, I found in IC datasheet this:
Minimum instruction execution time 2.0 µs (f(XIN) = 4.0 MHz, system clock = f(XIN)/2, VDD = 3.0 V)