Klickety-klacky HB-75P =P

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By Shrapnel

Resident (38)

Shrapnel's picture

04-12-2014, 14:17

Hi everyone!
Yesterday I got a Sony HB-75P and it seems perfect, except for a little strange detail.
Every time I power it on or reset it, I can hear a brief and loud *klack* noise coming from inside the machine. o_O
It sounds kind of 'mechanical' and a friend of mine who dabbles with electronics quite a lot told me that maybe the internal PSU contains a relais; in that case, the noise would be normal.

The problem is, I don't know anyone else who has an HB-75P and so I can't check if they all make that noise.
Can anybody help, please?

Thanks in advance! =)

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By Grauw

Ascended (10558)

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04-12-2014, 15:02

That is the cassette relais you’re hearing.

Type MOTOR ON and MOTOR OFF in Basic to make it click. I think you can use just MOTOR to toggle it.

It shouldn’t ‘click’ on start-up though. It usually only happens when the computer refuses to boot for some reason Smile, but that doesn’t seem to be the case here. If the MOTOR commands don’t work, there may be an issue, otherwise it’s probably fine...

I have a HB-75P at home btw (@work atm), I don’t use it often but I don’t recall the relais clicking when I turn it on.

By Shrapnel

Resident (38)

Shrapnel's picture

04-12-2014, 15:22

Cassette? Like in cassette tape?
Mmm... if so, I don't have one, lol!
I'm starting to get quite worried about that noise. =P

And anyway, thanks for suggesting a solution! =)

By Grauw

Ascended (10558)

Grauw's picture

04-12-2014, 15:44

No, the MSX has a relais inside to control the motor of a cassette recorder. It doesn’t matter if you’ve actually connected a tape recorder.

Have you tried the MOTOR Basic command? Does it click?

By AxelStone

Prophet (3093)

AxelStone's picture

04-12-2014, 18:04

Don't worry, Sony machines makes this sound. I've a HB-75P and my first MSX was a HB-F9S and I can confirm that both of them makes this noise.

By Shrapnel

Resident (38)

Shrapnel's picture

04-12-2014, 18:06

Grauw wrote:

No, the MSX has a relais inside to control the motor of a cassette recorder. It doesn’t matter if you’ve actually connected a tape recorder.

Oh, didn't know about that. o_O

Grauw wrote:

Have you tried the MOTOR Basic command? Does it click?

I'll try this evening, thanks again! =)

By Shrapnel

Resident (38)

Shrapnel's picture

04-12-2014, 18:07

AxelStone wrote:

Don't worry, Sony machines makes this sound. I've a HB-75P and my first MSX was a HB-F9S and I can confirm that both of them makes this noise.

Every time you power them on and reset them?
If so, I'll be definitely relieved, thank you! =D

By hit9918

Prophet (2921)

hit9918's picture

04-12-2014, 19:22

The good old casette relais click Smile
It can be handy. When at the end of a BLOAD it makes clack, you know the file finished. A hint that a hang may be about something else.
On reset, it looks like the hardware is active high. Then a tenth second later the bios makes it low again. Giving it a typical reset sound.
So there is nothing to worry about these noises. When it reacts to typing "motor" in BASIC, the case is clear.

By AxelStone

Prophet (3093)

AxelStone's picture

04-12-2014, 19:50

Shrapnel wrote:
AxelStone wrote:

Don't worry, Sony machines makes this sound. I've a HB-75P and my first MSX was a HB-F9S and I can confirm that both of them makes this noise.

Every time you power them on and reset them?
If so, I'll be definitely relieved, thank you! =D

Yes, it sounds even with a simple reset. Since F9S was my first computer I thought that all computers made that sound, so when I bought an Amstrad CPC 464 and didn't make any sound I found it strange Hannibal

By MäSäXi

Paragon (1884)

MäSäXi's picture

05-12-2014, 07:32

AxelStone wrote:

Don't worry, Sony machines makes this sound. I've a HB-75P and my first MSX was a HB-F9S and I can confirm that both of them makes this noise.

I don´t remember my HB-75P doing any non-standard sounds. I used it last time few years ago, so I cannot be sure though.

By Manuel

Ascended (18694)

Manuel's picture

05-12-2014, 08:55

I don't think it's the cassette relay, but indeed a relay in the PSU. I've several machines that make that sound.

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