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 http://www.qservice.tv/VPASP/shopexd.asp?id=5249
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

KenO wrote in message
...
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
http://www.qservice.tv/VPASP/shopexd.asp?id=5249
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


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

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.

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."

On Thu, 30 Jun 2011 07:28:59 -0700 (PDT), KenO
wrote:

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 http://www.qservice.tv/VPASP/shopexd.asp?id=5249
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
The HCD-551 Service Manual and SA-W551 Service manual are available on
Elektrotanya.
http://elektrotanya.com/?q=showresul...oria=&kat2=all
http://elektrotanya.com/?q=showresul...oria=&kat2=all

PlainBill

On Thu, 30 Jun 2011 16:23:45 +0100, N_Cook wrote:

KenO wrote in message
news:d83844e5-ccf7-4073-
...
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
http://www.qservice.tv/VPASP/shopexd.asp?id=5249
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


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

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

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 http://elektrotanya.com/?q=showresult
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.
http://webcache.googleusercontent.co...www.google.com

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

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.
http://esupport.sony.com/US/perl/mod...4,34 ,37,43,5

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

Ken