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Convert Tuner to Batteries?

Would like to convert a component AM/FM Tuner to batteries.

Was told about the Sony Tuners with System Control that are DC only and found a ST-JX 235 but not the integrated amp that has the AC power supply.

Does anyone know if there is a free schematic avail for this tuner on the internet?

Did a quick search using Sony HCD-551 and SA-W551 but only found Sony Original Service Manual HCD551 / HCD-551

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for $14.99

All I want is the DC Voltage for the Tuner so not to destroy anything.

When opened the tuner and inspected the System Control connector and attached small PC board noticed that it was marked N9V.

Does this mean that the Voltage to the Tuner is 9V?

Am open to any suggestions or tips.

Thanks

Ken

Reply to
KenO
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The JX230 is bridge Rect to 22V then regulated to 15 and 5V , probably loose the lamp drive if 15V only and would need separate 5V regulator if 15V DC supply

Reply to
N_Cook

Would you /please/ learn how to write coherently?

"The JX230 is a bridge rectifier with 22V output. It is regulated to 15V and

5V.

"Whether a 15V battery pack will work depends on how well the tuner tolerates a drop in voltage as the batteries discharge. It it's not tolerant, you'll need a higher voltage and a 15V regulator.

"Either way, a 5V regulator could be used to power whatever uses 5V."

Reply to
William Sommerwerck

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The HCD-551 Service Manual and SA-W551 Service manual are available on Elektrotanya.

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PlainBill

Reply to
PlainBill

snipped-for-privacy@v10g2000yqn.googlegroups.com...

If the dude has any skills it should be easy to build a 15/5 regulated supply using some zeners a couple TO220 regulators 24 volt transformer and little other stuff. Schematics should be found all over using Google.

--
Live Fast Die Young, Leave A Pretty Corpse
Reply to
Meat Plow

Hi Everyone,

Thanks for all your suggestions, tips, and links!

I dl the service manual for the 551 and found it did not contain the ST-JX235 Tuner so did a search on the website

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using "sony st jx 235" but got "0 hits"

Then Googled using "sony st-jx235" and found "Sony ST-JX235 Tuner 1986 Original Service Manual $8.95" so at least know it was mfr ~ 1986.

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Had hoped to run the system off std 12 Volt Battery so guess the next thing will be to check if works. If not will be looking for a newer Tuner.

Before do this any additional suggestions or tips?

Ken

Reply to
KenO

Forgot to mention that checked Sony website and typed in ST-JX235 but only got "Manuals Not currently posted for this model." Actually nothing was listed for this model.

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,38,4,34,37,43,5

What is even more confusing is a Sony Speaker STJX235 Speaker (only difference is No -)

Ken

Reply to
KenO

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