Guest
Can anyone tell me the characteristics of the zener diode D908 in the
power block xo5 sony deck.
Or can give me a schematics?
thanks
power block xo5 sony deck.
Or can give me a schematics?
thanks
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N
N_Cook
Guest
<mesantama@yahoo.it> wrote in message
news:4e8e15b6$0$43508$4fafbaef@reader2.news.tin.it...
news:4e8e15b6$0$43508$4fafbaef@reader2.news.tin.it...
Is there a Sony SLV??? model equivalent to X05Can anyone tell me the characteristics of the zener diode D908 in the
power block xo5 sony deck.
Or can give me a schematics?
thanks
Guest
N_Cook wrote:
I don't know if there a sony SLV???
Sony xo5 is an amplifier, tape and radio made in espana in the year 1982.mesantama@yahoo.it> wrote in message
news:4e8e15b6$0$43508$4fafbaef@reader2.news.tin.it...
Can anyone tell me the characteristics of the zener diode D908 in the
power block xo5 sony deck.
Or can give me a schematics?
thanks
Is there a Sony SLV??? model equivalent to X05
I don't know if there a sony SLV???
N
N_Cook
Guest
<mesantama@yahoo.it> wrote in message
news:4e8f84fd$0$38344$4fafbaef@reader1.news.tin.it...
exclusively for VCRs
news:4e8f84fd$0$38344$4fafbaef@reader1.news.tin.it...
Sony had an X model designation for some of their VCRs , obviously notN_Cook wrote:
mesantama@yahoo.it> wrote in message
news:4e8e15b6$0$43508$4fafbaef@reader2.news.tin.it...
Can anyone tell me the characteristics of the zener diode D908 in the
power block xo5 sony deck.
Or can give me a schematics?
thanks
Is there a Sony SLV??? model equivalent to X05
Sony xo5 is an amplifier, tape and radio made in espana in the year 1982.
I don't know if there a sony SLV???
exclusively for VCRs
F
Franc Zabkar
Guest
On Thu, 06 Oct 2011 22:55:26 +0200, mesantama@yahoo.it put finger to
keyboard and composed:
then its voltage rating will put an upper limit to the rating of the
diode.
Are there any markings on the diode?
Can you do a little circuit tracing in that area?
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
keyboard and composed:
Is there an electrolyic capacitor in parallel with the diode? If so,Can anyone tell me the characteristics of the zener diode D908 in the
power block xo5 sony deck.
then its voltage rating will put an upper limit to the rating of the
diode.
Are there any markings on the diode?
Can you do a little circuit tracing in that area?
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
F
Franc Zabkar
Guest
On Thu, 13 Oct 2011 23:44:43 +0200, mesantama@yahoo.it put finger to
keyboard and composed:
the emitter of BD535 would be Vz - (2 x 0.6V).
Obviously the zener voltage (Vz) can't be greater than 16V. I'd say it
is probably less than or equal to 12V.
The BD535 transistor has a current rating of 8A, so I would challenge
your value of 470 ohms for the collector resistor. Even if Ic were
only 100mA, the power dissipation in a 470 ohm resistor would be 4.7W.
Is it possible that it is in fact an 0.47 ohm fusible resistor? A
value of 89 ohms looks odd, too.
Do you have any idea what the output voltage of the BD535 transistor
should be? You may be able to determine this by examining the
datasheet for any IC that derives its supply from this circuit. If you
then add 1.2V to this value, you will have the zener voltage.
BD535 datasheet:
http://pdf.pfind.ru/B/BD535.pdf
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
keyboard and composed:
That's a zener regulated linear power supply. The output voltage atThis is the tracing.
the emitter of BD535 would be Vz - (2 x 0.6V).
Obviously the zener voltage (Vz) can't be greater than 16V. I'd say it
is probably less than or equal to 12V.
The BD535 transistor has a current rating of 8A, so I would challenge
your value of 470 ohms for the collector resistor. Even if Ic were
only 100mA, the power dissipation in a 470 ohm resistor would be 4.7W.
Is it possible that it is in fact an 0.47 ohm fusible resistor? A
value of 89 ohms looks odd, too.
Do you have any idea what the output voltage of the BD535 transistor
should be? You may be able to determine this by examining the
datasheet for any IC that derives its supply from this circuit. If you
then add 1.2V to this value, you will have the zener voltage.
BD535 datasheet:
http://pdf.pfind.ru/B/BD535.pdf
- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.