Panasonic NV F70 Power supply Help

R

Ren

Guest
Hi there.

I have a Panasonic NV F70 Hifi VCR that has a wicked power supply fault.
I received the Unit in DEAD state.
I have religeously gone through and replaced all the electrolytics.

While replacing the Electrlytics, i discovered a resistor (R25) to be
ruptured. (2.2 Ohm i believe)
This Resistor is located directly after the Bridge rectifier (D2).
It was Open Circuit.
What i need is a skematic just for the power supply module, so then i can
continue to trace what caused this fault.

I did replace the resistor , only to be greeted with what i anticipated. A
nice visual extravagansa of blown resistor

Any help would be Excellent.


Thanks

Ren(NZ)
 
Check/replace the chopper ic.

Good luck
"Ren" <Renoneninesevenfour@xtra.co.nz> wrote in message
news:_h5hb.172465$JA5.4320861@news.xtra.co.nz...
Hi there.

I have a Panasonic NV F70 Hifi VCR that has a wicked power supply fault.
I received the Unit in DEAD state.
I have religeously gone through and replaced all the electrolytics.

While replacing the Electrlytics, i discovered a resistor (R25) to be
ruptured. (2.2 Ohm i believe)
This Resistor is located directly after the Bridge rectifier (D2).
It was Open Circuit.
What i need is a skematic just for the power supply module, so then i can
continue to trace what caused this fault.

I did replace the resistor , only to be greeted with what i anticipated. A
nice visual extravagansa of blown resistor

Any help would be Excellent.


Thanks

Ren(NZ)
Click to expand...
 
Thanks Ian..

I take it , that the Chopper IC is located just beside the small
transformer.
I see a 6 legged IC, with a 3 Terminal transistor tapped on the end ??.
With the Labels Q1 and IC 3 ??

Any chance of a diagram for this supply ??

Thanks

Ren


"Ian" <trueblueace@hotmail.com> wrote in message
news:3f87b75d$0$5391$afc38c87@news.optusnet.com.au...
Check/replace the chopper ic.

Good luck
"Ren" <Renoneninesevenfour@xtra.co.nz> wrote in message
news:_h5hb.172465$JA5.4320861@news.xtra.co.nz...
Hi there.

I have a Panasonic NV F70 Hifi VCR that has a wicked power supply fault.
I received the Unit in DEAD state.
I have religeously gone through and replaced all the electrolytics.

While replacing the Electrlytics, i discovered a resistor (R25) to be
ruptured. (2.2 Ohm i believe)
This Resistor is located directly after the Bridge rectifier (D2).
It was Open Circuit.
What i need is a skematic just for the power supply module, so then i
can
continue to trace what caused this fault.

I did replace the resistor , only to be greeted with what i anticipated.
A
nice visual extravagansa of blown resistor

Any help would be Excellent.


Thanks

Ren(NZ)
Click to expand...
 
Hi Ren.
Sorry i haven't got a cct.
Try this 1/replace the resistor again. DON'T apply power yet
2/Make sure there is no charge on the mains filter
cap. Check the resistance reading across the
mains cap if it measures low or short.
Remove the ic and then measure across the mains cap and
the short would have disappeared if so replace the ic.
"Ren" <Renoneninesevenfour@xtra.co.nz> wrote in message
news:RQqib.176838$JA5.4433281@news.xtra.co.nz...
Thanks Ian..

I take it , that the Chopper IC is located just beside the small
transformer.
I see a 6 legged IC, with a 3 Terminal transistor tapped on the end ??.
With the Labels Q1 and IC 3 ??

Any chance of a diagram for this supply ??

Thanks

Ren


"Ian" <trueblueace@hotmail.com> wrote in message
news:3f87b75d$0$5391$afc38c87@news.optusnet.com.au...
Check/replace the chopper ic.

Good luck
"Ren" <Renoneninesevenfour@xtra.co.nz> wrote in message
news:_h5hb.172465$JA5.4320861@news.xtra.co.nz...
Hi there.

I have a Panasonic NV F70 Hifi VCR that has a wicked power supply
fault.
I received the Unit in DEAD state.
I have religeously gone through and replaced all the electrolytics.

While replacing the Electrlytics, i discovered a resistor (R25) to be
ruptured. (2.2 Ohm i believe)
This Resistor is located directly after the Bridge rectifier (D2).
It was Open Circuit.
What i need is a skematic just for the power supply module, so then i
can
continue to trace what caused this fault.

I did replace the resistor , only to be greeted with what i
anticipated.
A
nice visual extravagansa of blown resistor

Any help would be Excellent.


Thanks

Ren(NZ)
Click to expand...
 
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