[TechAssist] Re: Toshiba 42H81 blowing fuse
- From: "Bob Derrick" <bderrick@xxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 9 Aug 2003 00:13:18 -0400
YES we had one of these pulled it to shop twice. sometimes would run for
days. FIX FOUND a bare jumper wire had broken lose on the bottom of the
circuit board UNDER the plastic rail that is screwed down, on the double
sided board with the convergence amps on it!
On another found a broken jumper on the other side of the same board
under
the tuner that caused no pic.
Bob
c/o Leader TV, Rochester, NY 585-328-8181
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Valley TV
Sent: Thursday, August 07, 2003 4:07 PM
To: techassist@xxxxxxxxxxxxx
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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