Digitor G5151 ctv - no hor. drive.

R

Russell Griffiths

Guest
Greetings group.
Digitor ctv model G5151.

Power light always stays red in standby mode or on mode.

Output voltages from power supply 8v and 83v(B+)

There is no horizontal drive signal from IC100 (OM8361), pin 37.

The adjustment for B+ only varies the v by around 5v.

Caps and many diodes/resistors tested.

Unable to find a schematic yet.



Can anyone please tell me if the B+ is correct?

What pins on IC100 are the power pins and what should the voltages be?

Any other info?


Thanks,
Russell Griffiths.
 
On Mon, 21 Mar 2005 10:45:26 +1100, "Russell Griffiths"
<rg26ce1991@hotmail.com> put finger to keyboard and composed:

Greetings group.
Digitor ctv model G5151.

Power light always stays red in standby mode or on mode.

Output voltages from power supply 8v and 83v(B+)

There is no horizontal drive signal from IC100 (OM8361), pin 37.
Click to expand...
Is this datasheet (TDA8361) the correct one?
http://www.semiconductors.philips.com/acrobat_download/datasheets/TDA8360_61_62_3.pdf

The adjustment for B+ only varies the v by around 5v.
Click to expand...
Can you trace the circuit in this area? It may be possible to
calculate the correct voltage from the component values.

Caps and many diodes/resistors tested.

Unable to find a schematic yet.
Click to expand...
Have you tried DSE's service department?

Can anyone please tell me if the B+ is correct?

What pins on IC100 are the power pins and what should the voltages be?
Click to expand...
Vp, pin 10, 8V ???

Any other info?


Thanks,
Russell Griffiths.
Click to expand...

- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
Russell, B+ seem s a bit low.
Is the Horz Output Transistor ok.
Is vertical drive present.pin 43
Is VSTART present pin 36
OM8631 see TDA 8631
Vp PIN 10 8V
Check yoke windings for s/c turns
Cheers
Joe


"Franc Zabkar" <fzabkar@optussnet.com.au> wrote in message
news:8g9s31h6dc1rim61da333gd6g1imlflrh9@4ax.com...
On Mon, 21 Mar 2005 10:45:26 +1100, "Russell Griffiths"
rg26ce1991@hotmail.com> put finger to keyboard and composed:

Greetings group.
Digitor ctv model G5151.

Power light always stays red in standby mode or on mode.

Output voltages from power supply 8v and 83v(B+)

There is no horizontal drive signal from IC100 (OM8361), pin 37.

Is this datasheet (TDA8361) the correct one?

http://www.semiconductors.philips.com/acrobat_download/datasheets/TDA8360_61
Click to expand...
_62_3.pdf
The adjustment for B+ only varies the v by around 5v.

Can you trace the circuit in this area? It may be possible to
calculate the correct voltage from the component values.

Caps and many diodes/resistors tested.

Unable to find a schematic yet.

Have you tried DSE's service department?

Can anyone please tell me if the B+ is correct?

What pins on IC100 are the power pins and what should the voltages be?

Vp, pin 10, 8V ???

Any other info?


Thanks,
Russell Griffiths.



- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
Click to expand...
 
Hi Russell,

You could try the DSE service department although I don't know if they will
help you as these units are serviced under contract by Telefix, so they may
be your best bet for a schematic.

Mike




On Mon, 21 Mar 2005 10:45:26 +1100, "Russell Griffiths"
<rg26ce1991@hotmail.com> wrote:

Greetings group.
Digitor ctv model G5151.

Power light always stays red in standby mode or on mode.

Output voltages from power supply 8v and 83v(B+)

There is no horizontal drive signal from IC100 (OM8361), pin 37.

The adjustment for B+ only varies the v by around 5v.

Caps and many diodes/resistors tested.

Unable to find a schematic yet.



Can anyone please tell me if the B+ is correct?

What pins on IC100 are the power pins and what should the voltages be?

Any other info?


Thanks,
Russell Griffiths.
Click to expand...
 
Thanks for the info. (again) Franc.
I have just downloaded the datasheet and it looks like the chip I have.
Thanks for the other info, I will let you know how the job turns out.

"Franc Zabkar" <fzabkar@optussnet.com.au> wrote in message
news:8g9s31h6dc1rim61da333gd6g1imlflrh9@4ax.com...
On Mon, 21 Mar 2005 10:45:26 +1100, "Russell Griffiths"
rg26ce1991@hotmail.com> put finger to keyboard and composed:

Greetings group.
Digitor ctv model G5151.

Power light always stays red in standby mode or on mode.

Output voltages from power supply 8v and 83v(B+)

There is no horizontal drive signal from IC100 (OM8361), pin 37.

Is this datasheet (TDA8361) the correct one?

http://www.semiconductors.philips.com/acrobat_download/datasheets/TDA8360_61_62_3.pdf

The adjustment for B+ only varies the v by around 5v.

Can you trace the circuit in this area? It may be possible to
calculate the correct voltage from the component values.

Caps and many diodes/resistors tested.

Unable to find a schematic yet.

Have you tried DSE's service department?

Can anyone please tell me if the B+ is correct?

What pins on IC100 are the power pins and what should the voltages be?

Vp, pin 10, 8V ???

Any other info?


Thanks,
Russell Griffiths.



- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
Click to expand...
 
Greetings Joe.
Yes I thought the B+ was a bit low too, but I have not yet found out what it
should be.
The HOT appears to be o.k.
I will check the other things you have mentioned.

Ta,
Russell Griffiths.

"valiumboy" <pussynuts@bigpond.com> wrote in message
news:sZw%d.5839$C7.4129@news-server.bigpond.net.au...
Russell, B+ seem s a bit low.
Is the Horz Output Transistor ok.
Is vertical drive present.pin 43
Is VSTART present pin 36
OM8631 see TDA 8631
Vp PIN 10 8V
Check yoke windings for s/c turns
Cheers
Joe


"Franc Zabkar" <fzabkar@optussnet.com.au> wrote in message
news:8g9s31h6dc1rim61da333gd6g1imlflrh9@4ax.com...
On Mon, 21 Mar 2005 10:45:26 +1100, "Russell Griffiths"
rg26ce1991@hotmail.com> put finger to keyboard and composed:

Greetings group.
Digitor ctv model G5151.

Power light always stays red in standby mode or on mode.

Output voltages from power supply 8v and 83v(B+)

There is no horizontal drive signal from IC100 (OM8361), pin 37.

Is this datasheet (TDA8361) the correct one?


http://www.semiconductors.philips.com/acrobat_download/datasheets/TDA8360_61
_62_3.pdf

The adjustment for B+ only varies the v by around 5v.

Can you trace the circuit in this area? It may be possible to
calculate the correct voltage from the component values.

Caps and many diodes/resistors tested.

Unable to find a schematic yet.

Have you tried DSE's service department?

Can anyone please tell me if the B+ is correct?

What pins on IC100 are the power pins and what should the voltages be?

Vp, pin 10, 8V ???

Any other info?


Thanks,
Russell Griffiths.



- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
Click to expand...
 
Thanks Mike.
I will try them both if I have too.
Bye,
Russell Griffiths

"Mike Paull" <mike351@removethis.ozemail.com.au> wrote in message
news:0tgt31hsmc3kthfg6nqv2dc19dhc8p3k5e@4ax.com...
Hi Russell,

You could try the DSE service department although I don't know if they
will
help you as these units are serviced under contract by Telefix, so they
may
be your best bet for a schematic.

Mike




On Mon, 21 Mar 2005 10:45:26 +1100, "Russell Griffiths"
rg26ce1991@hotmail.com> wrote:

Greetings group.
Digitor ctv model G5151.

Power light always stays red in standby mode or on mode.

Output voltages from power supply 8v and 83v(B+)

There is no horizontal drive signal from IC100 (OM8361), pin 37.

The adjustment for B+ only varies the v by around 5v.

Caps and many diodes/resistors tested.

Unable to find a schematic yet.



Can anyone please tell me if the B+ is correct?

What pins on IC100 are the power pins and what should the voltages be?

Any other info?


Thanks,
Russell Griffiths.
Click to expand...
 
No worries Russell.The B+ sould be around 110-120v depending of the design
and size of the CTV.

"Russell Griffiths" <rg26ce1991@hotmail.com> wrote in message
news:d1nvdq$a8b$3@news-02.connect.com.au...
Thanks Mike.
I will try them both if I have too.
Bye,
Russell Griffiths

"Mike Paull" <mike351@removethis.ozemail.com.au> wrote in message
news:0tgt31hsmc3kthfg6nqv2dc19dhc8p3k5e@4ax.com...
Hi Russell,

You could try the DSE service department although I don't know if they
will
help you as these units are serviced under contract by Telefix, so they
may
be your best bet for a schematic.

Mike




On Mon, 21 Mar 2005 10:45:26 +1100, "Russell Griffiths"
rg26ce1991@hotmail.com> wrote:

Greetings group.
Digitor ctv model G5151.

Power light always stays red in standby mode or on mode.

Output voltages from power supply 8v and 83v(B+)

There is no horizontal drive signal from IC100 (OM8361), pin 37.

The adjustment for B+ only varies the v by around 5v.

Caps and many diodes/resistors tested.

Unable to find a schematic yet.



Can anyone please tell me if the B+ is correct?

What pins on IC100 are the power pins and what should the voltages be?

Any other info?


Thanks,
Russell Griffiths.
Click to expand...
 
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