[TechAssist] Re: Hitatchi 50FX18B chassis AP-62 Blue upper left corner convergence bad.
- From: Kevin <kevintv@xxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 04 Apr 2005 02:09:25 -0700
I would check all the caps with my ESR meter and change the bad ones.
If that didn't fix it, then I would replace all 3 convergence IC's. If
you don't want to replace all 3 in case there is another fault, I would
get the service manual from the Hitachi website and find out which one
is at fault, and just replace one. If it fixes the convergence, then
replace the other 2. In most cases it is the convergence IC's at fault.
Kevin Wilks
Kevin's TV & Video Repair
Penticton BC Canada
kevintv@xxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of LeRoy Westlund
Sent: Saturday, April 02, 2005 10:58 AM
To: TechAssist
Subject: [TechAssist] Hitatchi 50FX18B chassis AP-62 Blue upper left
corner convergence bad.
Hi members,
The blue convergence is off about 2 inches at the top left corner of the
screen.
All convergence adjustments work properly, but, have no effect in this
area.
I found some info in some e-mails I saved, saying that the DCU module
might
have bad fish-caps in it. I pulled the DCU module to the shop, where I
examined it, and could not see any discolored, or any signs of leaking
caps,
or contamination. I hate to pull, and replace any of these caps, unless
I am
fairly sure that is where my problem is.
I have not changed any of the 3 convergence ICs yet (STK4274), cause I
would
have to order some in first. What should I do first ? Change the
convergence
output ICs, or rebuild the DCU model ? There are about 20 fish caps on
the
module, and they are hard to remove without damage to the traces. This
set
is 9 years old.
Any advice is appreciated.
LLW
LeRoy Westlund
Westlund TV & Electronics
97 North Main " I forgot,..to remember,..
Centerfield, UT 84622-0087 to forget "
Ph./Fax 435-528-3822
mailto:LLW@xxxxxxxxxx
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