[TechAssist] Re: Toshiba 42H81 blowing fuse
- From: "Bob Derrick" <bderrick@xxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 9 Aug 2003 00:13:19 -0400
` The slo-blo bulletin that I'm familiar with is for the 3.15 gma type.
If the low ohm resistors have changed in value wouldn't this indicate an
over current / over heating condition? Unless I saw broken solder
connections I would change the stk anyway as I have seen a lot of these go
bad in a lot of different TV's including intermittently blowing the fuse as
the only symptom. any time I can remember changing the fuse without
changing the stk I've had to go back and change them even if there were
broken solder connections.
Bob
Leader TV, Rochester, NY
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of walter wood
Sent: Thursday, August 07, 2003 5:24 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Toshiba 42H81 blowing fuse
I remember a toshiba bulletin about replacing those
convergence fuses with Slo Blo type, but don't know
if your model is included in that.
I also remember a bulletin that said the STK's
didn't fail all that often but to be sure and check
all the low ohms resistors in that circuit.
It's been my experience however, that replacing the
STK's and a good resoldering usually does the
trick.
I'll try to find the bulletin about using Slo Blo
fuses there.
Walter
--- "Phillip R. Hull" <phil245@xxxxxxxxxxxxx>
wrote:
> Did you replace fuse with OEM part??
> Phillip R Hull STET
> phil245@xxxxxxxxxxxxx
> FAX 517--569-3075
> ----- Original Message -----
> From: "Valley TV" <valleytv@xxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, August 07, 2003 4:07 PM
> Subject: [TechAssist] Toshiba 42H81 blowing fuse
>
>
> > Hi everybody!
> > Hope someone has encountered a disaster that I
> have with a Toshiba 42H81
> blowing a 5A fuse.
> > Sent to a home outside of Philadelphia with the
> complaint "red light
> blinks only". Found F850, F851 (5amp fuses),
> F470 (2A) and F890 (3.15A) all
> blown. Carefully checked for ANY defective parts
> and found NONE (quite a
> surprise when 4 fuses blow). I replaced all 4
> fuses and held my breath..
> TV immediately came on with a great picture which
> really was a surprise!
> Since there have been so many electrical storms
> around I was hopeful.. 2
> days later customer called and said "red light
> blinks only". I expected to
> find all the fuses blown again but only F850
> (+16V) had blown. When I
> replaced it the set immediately came on but I
> "knew" there was no way it was
> only a bad fuse. I pushed the service manual cd
> in my laptop and found that
> F850 and F851 both fed the 2 convergence IC's. I
> replaced both and really
> did not expect to hear from the customer again.
> Surprise..2 more days and
> "red light blinks only". I'm planning on driving
> back tomorrow but I would
> appreciate anyone's th
> > oughts on this. Set cannot be removed from
> home in this case so I will
> certainly have to figure it out there.. I have
> had some new bad
> STK392-110's in the past but it seems unlikely
> but any ideas are helpful!
> >
> > Gary
> > Valley TV
> > Drums, Pa office
> > valleytv@xxxxxxx
> >
> > --
> >
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=====
Walter Wood
Future Tech Home Center
2786 Hwy. 43 N.
Lawrenceburg Tn. 38464
931-829-3337
Fax 931-829-4044
mailto:wwood_38478@xxxxxxxxx
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