No Sound

Bad speaker? Audio board in need of repair?

All sounds don't work not even the bell the or the whistle correct? Do they work in conventional mode with the volume pot turned half way up?

Hello,

No bell, no whistle and no sound in conventional.

Jean

OK, so we suspect bad speaker. That's not unheard of and sadly more common than you might hope to find a bad speaker.

Primary cause was impurities in the magnet oxidize and just like zinc pest, it begins to deform and crumble. Because of the tight tolerance to the voice coil- this can rub through and short the voice coil. Any flaking or deformation are signs, but again from this time era, they can be bad and not be obvious, where others are plainly obvious and not yet shorted.

Worst case scenario- the bad speaker shorts the voice coil to frame ground= damaged audio amp IC on the PS2 board.

Hello Vernon,

Thank you , I will check again the speaker.

Jean

Jean, If you have a multi-meter, Ohm the the leads of the speaker when removed. A good speaker has about 8 ohms and direct short may be bad news for the Audio board. If the speaker shows signs of flaking, it is definitely toast.

Hello H1000,

Thanks for informations, I will check this evening.

Jean

PS2 3V uses a 4 Ohm speaker.

PS2 5V (older with the 9V battery) used 16 Ohms

PS1 uses 8 Ohms

Also,  should say, measuring just Ohms is not enough to determine good speaker vs bad. Since a speaker does have to move and move freely- it takes multiple tests- yes, basic resistance, across the coil, but also check for coil to metal frame short, and last, even a bad speaker that is jammed and won't make much if any sound- could test OK electrically.

I know we are not there yet, and hoping you do not have to go there, but this is info on the amplifier section of the board.

https://ogrforum.com/...th-ps2-3-volt-boards

Hi, the best thing is NOT TO POWER UP BOARD AGAIN if the speaker is defective powering up board again could blow the audio amp! best to try a known good speaker if sounds return just replace speaker otherwise an Asc tech will need to replace audio Amp!

Alan

Vernon,

Thanks again for the informations, I will try to find a new speaker.

Jean

@Jean Perusse posted:

Hello H1000,

Thanks for informations, I will check this evening.

Jean

What Vernon said about proper Speaker Ohm readings is correct. Ignore my 8 Ohm comment from earlier, I've been working on a lot of Lionel stuff lately on my bench and 8 ohms is on mind!!

Hello Alan,

I will stop to power up the board again.

Thanks.

Jean

Hello H1000,

Ok, I will ignore your comment from earlier.

Thanks again.

Jean

Hello,

Can the original speaker (4 Ohms 4 Watts) be replaced

by 4 Ohms 3 Watts speaker ?

Jean

Sure, it's never driven to even 3 Watts.

Hi Vernon,

Thanks for your reply.

Jean

Follow-up:

My son-in-law had to change the audio chip and the sound came back.

Thank you to all for your expertise.

Jean