Help with Toshiba CF3072B
 

I am looking for help with a Toshiba 30" TV, model CF3072B. The problem is
with the top 10% of the picture. It has white lines across the first 40 -50
lines. I believe that one or more of the capacitors in the vertical or
horizontal circuit is bad. I'm hoping someone out there has an idea on which
one it maybe.



Stephen

Help with Toshiba CF3072B
 

Lots of them, replace all the vertical circuit related capacitors.
Do a Google groups search for Toshiba, vertical for the specifics.

"Stephen K. Long" wrote in message
ink.net...
I am looking for help with a Toshiba 30" TV, model CF3072B. The problem is
with the top 10% of the picture. It has white lines across the first
40 -50
lines. I believe that one or more of the capacitors in the vertical or
horizontal circuit is bad. I'm hoping someone out there has an idea on
which
one it maybe.



Stephen

Help with Toshiba CF3072B
 

Especially the small caps near the vertical output and the similar one near
the jungle chip. I seem to remember they were either red or green in colour
but can't recall the value.
"David" wrote in message
...
Lots of them, replace all the vertical circuit related capacitors.
Do a Google groups search for Toshiba, vertical for the specifics.

"Stephen K. Long" wrote in message
ink.net...
I am looking for help with a Toshiba 30" TV, model CF3072B. The problem
is
with the top 10% of the picture. It has white lines across the first
40 -50
lines. I believe that one or more of the capacitors in the vertical or
horizontal circuit is bad. I'm hoping someone out there has an idea on
which
one it maybe.



Stephen

Help with Toshiba CF3072B
 

"David" wrote in message
...
Lots of them, replace all the vertical circuit related capacitors.
Do a Google groups search for Toshiba, vertical for the specifics.

Actually there are not likely to be that many, maybe a half dozen caps.
IIRC this one also has the potentiometer that needs to be cleaned thoroughly
and a cap or two in the p.s. that get bad. Note that on most of the
Toshibas, one of the caps in the vertical circuit (typically 3xx numbering)
is in the vicinity of the VCJ chip and sometimes gets missed if you don't
know the sets.

Rather than replacing all of the vertical circuit caps, you need to test
them properly, along with caps in other areas, and replace the bad caps in
the entire set if you want a reliable fix.

This set may have also had the infamous Sony sound module or the problems
with bad solder joints at the interface of the daughter-boards to the main
board.

Be sure to clean any electrolyte leakage off of the board and repair any
corroded traces.

Leonard

Help with Toshiba CF3072B
 

Quick question, what is the VCJ chip and were is it located?

Stephen

"Leonard Caillouet" wrote in message
news:cG7Nc.11411$BX.472@lakeread08...

"David" wrote in message
...
Lots of them, replace all the vertical circuit related capacitors.
Do a Google groups search for Toshiba, vertical for the specifics.

Actually there are not likely to be that many, maybe a half dozen caps.
IIRC this one also has the potentiometer that needs to be cleaned
thoroughly
and a cap or two in the p.s. that get bad. Note that on most of the
Toshibas, one of the caps in the vertical circuit (typically 3xx
numbering)
is in the vicinity of the VCJ chip and sometimes gets missed if you don't
know the sets.

Rather than replacing all of the vertical circuit caps, you need to test
them properly, along with caps in other areas, and replace the bad caps in
the entire set if you want a reliable fix.

This set may have also had the infamous Sony sound module or the problems
with bad solder joints at the interface of the daughter-boards to the main
board.

Be sure to clean any electrolyte leakage off of the board and repair any
corroded traces.

Leonard

Help with Toshiba CF3072B
 

Thanks all,

I replaced C308, 35V 220uF. The free TV looks great and my wife thinks I
HOT.....



"David" wrote in message
...
Lots of them, replace all the vertical circuit related capacitors.
Do a Google groups search for Toshiba, vertical for the specifics.

"Stephen K. Long" wrote in message
ink.net...
I am looking for help with a Toshiba 30" TV, model CF3072B. The problem
is
with the top 10% of the picture. It has white lines across the first
40 -50
lines. I believe that one or more of the capacitors in the vertical or
horizontal circuit is bad. I'm hoping someone out there has an idea on
which
one it maybe.



Stephen

Help with Toshiba CF3072B
 

Congrats Steve!!
"Stephen K. Long" wrote in message
link.net...
Thanks all,

I replaced C308, 35V 220uF. The free TV looks great and my wife thinks I
HOT.....



"David" wrote in message
...
Lots of them, replace all the vertical circuit related capacitors.
Do a Google groups search for Toshiba, vertical for the specifics.

"Stephen K. Long" wrote in message
ink.net...
I am looking for help with a Toshiba 30" TV, model CF3072B. The
problem
is
with the top 10% of the picture. It has white lines across the first
40 -50
lines. I believe that one or more of the capacitors in the vertical or
horizontal circuit is bad. I'm hoping someone out there has an idea on
which
one it maybe.



Stephen