Help with Sony 34XBR800 7 blinks Whats most likely cause

B

Boboranntrottier

Guest
I have a friend who loves this set and it's been not working for a while. He
asked me to look at it and I'll get it next week so I thought I''d do some
research .
The diagnostics light blinks 7 times indicating the problem is in the
horizontal deflection circuit.
The Schematics I have are very hard to read and I assume Q8001 and Q8013
are the output transistors and the most likely cause
They are IRF 1B7N 50 A which I can't find a source for
is there a sub or do I need go to sony
Is there something else I should be looking at ?

Thanks in advance
Bob
 
"Boboranntrottier" <boboranntrottier@verizon.net> wrote in message
news:J35al.5273$Es4.4915@nwrddc01.gnilink.net...
I have a friend who loves this set and it's been not working for a while.
He
asked me to look at it and I'll get it next week so I thought I''d do some
research .
The diagnostics light blinks 7 times indicating the problem is in the
horizontal deflection circuit.
The Schematics I have are very hard to read and I assume Q8001 and Q8013
are the output transistors and the most likely cause
They are IRF 1B7N 50 A which I can't find a source for
is there a sub or do I need go to sony
Is there something else I should be looking at ?

Thanks in advance
Bob
Click to expand...
Assuming the two white Micron fusible resistors are OK, your problem is
IC8002, a MCZ3001D. Replace it with the DB suffix version. We do lots of
these.

Mark Z.
 
MArk Thanks I ordered one and hopefully that solves it
Also what are the reference designators for the resistors you mention I
couldn't locate them on teh schematic
Bob


"Mark Zacharias" <mark_zacharias@labolgcbs.net> wrote in message
news:629al.4743$jZ1.1156@flpi144.ffdc.sbc.com...
"Boboranntrottier" <boboranntrottier@verizon.net> wrote in message
news:J35al.5273$Es4.4915@nwrddc01.gnilink.net...
I have a friend who loves this set and it's been not working for a while.
He
asked me to look at it and I'll get it next week so I thought I''d do
some
research .
The diagnostics light blinks 7 times indicating the problem is in the
horizontal deflection circuit.
The Schematics I have are very hard to read and I assume Q8001 and Q8013
are the output transistors and the most likely cause
They are IRF 1B7N 50 A which I can't find a source for
is there a sub or do I need go to sony
Is there something else I should be looking at ?

Thanks in advance
Bob



Assuming the two white Micron fusible resistors are OK, your problem is
IC8002, a MCZ3001D. Replace it with the DB suffix version. We do lots of
these.

Mark Z.
Click to expand...
 
"Boboranntrottier" <boboranntrottier@verizon.net> wrote in message
news:RWial.5876$Es4.368@nwrddc01.gnilink.net...
MArk Thanks I ordered one and hopefully that solves it
Also what are the reference designators for the resistors you mention I
couldn't locate them on teh schematic
Bob


"Mark Zacharias" <mark_zacharias@labolgcbs.net> wrote in message
news:629al.4743$jZ1.1156@flpi144.ffdc.sbc.com...
"Boboranntrottier" <boboranntrottier@verizon.net> wrote in message
news:J35al.5273$Es4.4915@nwrddc01.gnilink.net...
I have a friend who loves this set and it's been not working for a while.
He
asked me to look at it and I'll get it next week so I thought I''d do
some
research .
The diagnostics light blinks 7 times indicating the problem is in the
horizontal deflection circuit.
The Schematics I have are very hard to read and I assume Q8001 and
Q8013
are the output transistors and the most likely cause
They are IRF 1B7N 50 A which I can't find a source for
is there a sub or do I need go to sony
Is there something else I should be looking at ?

Thanks in advance
Bob



Assuming the two white Micron fusible resistors are OK, your problem is
IC8002, a MCZ3001D. Replace it with the DB suffix version. We do lots of
these.

Mark Z.
Click to expand...

Don't know the reference numbers for the resistors offhand, they are pretty
obvious along the outer edge of the board, halfway between the flyback and
the board edge which is nearer the front of the set. They are very low
value, .1 ohm if memory serves, and sit near a couple fairly large
capacitors. If one of these resistors is bad the flyback probably went bad
and hammered the switcher transistors and horizontal output. This is much
less common, however.

Would have been a good idea to check those resistors BEFORE ordering the
part, though...


Mark Z.
 
Thansk again
I had him confirm that it blinked 7 times
so today when he drops it off outside my house its zero degrees and it sits
there for 3-4 hours
I get it inside and opened up and it runs fine
I get five blinks on the diags which I assume is just the white balance
Any thoughts??
I'll probabaly change the chip anyway
Thanks again


"Mark Zacharias" <mark_zacharias@labolgcbs.net> wrote in message
news:E9nal.8626$hc1.2952@flpi150.ffdc.sbc.com...
"Boboranntrottier" <boboranntrottier@verizon.net> wrote in message
news:RWial.5876$Es4.368@nwrddc01.gnilink.net...
MArk Thanks I ordered one and hopefully that solves it
Also what are the reference designators for the resistors you mention I
couldn't locate them on teh schematic
Bob


"Mark Zacharias" <mark_zacharias@labolgcbs.net> wrote in message
news:629al.4743$jZ1.1156@flpi144.ffdc.sbc.com...
"Boboranntrottier" <boboranntrottier@verizon.net> wrote in message
news:J35al.5273$Es4.4915@nwrddc01.gnilink.net...
I have a friend who loves this set and it's been not working for a
while.
He
asked me to look at it and I'll get it next week so I thought I''d do
some
research .
The diagnostics light blinks 7 times indicating the problem is in the
horizontal deflection circuit.
The Schematics I have are very hard to read and I assume Q8001 and
Q8013
are the output transistors and the most likely cause
They are IRF 1B7N 50 A which I can't find a source for
is there a sub or do I need go to sony
Is there something else I should be looking at ?

Thanks in advance
Bob



Assuming the two white Micron fusible resistors are OK, your problem is
IC8002, a MCZ3001D. Replace it with the DB suffix version. We do lots of
these.

Mark Z.





Don't know the reference numbers for the resistors offhand, they are
pretty
obvious along the outer edge of the board, halfway between the flyback and
the board edge which is nearer the front of the set. They are very low
value, .1 ohm if memory serves, and sit near a couple fairly large
capacitors. If one of these resistors is bad the flyback probably went bad
and hammered the switcher transistors and horizontal output. This is much
less common, however.

Would have been a good idea to check those resistors BEFORE ordering the
part, though...


Mark Z.
Click to expand...
 
"Boboranntrottier" <boboranntrottier@verizon.net> wrote in message
news:hiSbl.491$Dx.59@nwrddc02.gnilink.net...
Thansk again
I had him confirm that it blinked 7 times
so today when he drops it off outside my house its zero degrees and it
sits
there for 3-4 hours
I get it inside and opened up and it runs fine
I get five blinks on the diags which I assume is just the white balance
Any thoughts??
I'll probabaly change the chip anyway
Thanks again


"Mark Zacharias" <mark_zacharias@labolgcbs.net> wrote in message
news:E9nal.8626$hc1.2952@flpi150.ffdc.sbc.com...
"Boboranntrottier" <boboranntrottier@verizon.net> wrote in message
news:RWial.5876$Es4.368@nwrddc01.gnilink.net...
MArk Thanks I ordered one and hopefully that solves it
Also what are the reference designators for the resistors you mention I
couldn't locate them on teh schematic
Bob


"Mark Zacharias" <mark_zacharias@labolgcbs.net> wrote in message
news:629al.4743$jZ1.1156@flpi144.ffdc.sbc.com...
"Boboranntrottier" <boboranntrottier@verizon.net> wrote in message
news:J35al.5273$Es4.4915@nwrddc01.gnilink.net...
I have a friend who loves this set and it's been not working for a
while.
He
asked me to look at it and I'll get it next week so I thought I''d do
some
research .
The diagnostics light blinks 7 times indicating the problem is in the
horizontal deflection circuit.
The Schematics I have are very hard to read and I assume Q8001 and
Q8013
are the output transistors and the most likely cause
They are IRF 1B7N 50 A which I can't find a source for
is there a sub or do I need go to sony
Is there something else I should be looking at ?

Thanks in advance
Bob



Assuming the two white Micron fusible resistors are OK, your problem is
IC8002, a MCZ3001D. Replace it with the DB suffix version. We do lots
of
these.

Mark Z.





Don't know the reference numbers for the resistors offhand, they are
pretty
obvious along the outer edge of the board, halfway between the flyback
and
the board edge which is nearer the front of the set. They are very low
value, .1 ohm if memory serves, and sit near a couple fairly large
capacitors. If one of these resistors is bad the flyback probably went
bad
and hammered the switcher transistors and horizontal output. This is much
less common, however.

Would have been a good idea to check those resistors BEFORE ordering the
part, though...


Mark Z.
Click to expand...

These things are often intermittent. I'd change the chip anyway. 5 blinks
may be a video driver IC on the CRT board, but that would usually not be
intermittent. Maybe just a screen adjustment on the FBT.

Mark Z.
 
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