[TechAssist] Re: Hitachi 60sx1k -AP 14 chassis. Big Pix Bending, poor sync
- From: "TechAssist Admin." <techassist@xxxxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 10 Oct 2001 11:59:11 -0500
Damon, is this a 60SX11K? If so, I have the manuals if you
need them. I have no tips on this problem.
-Clint
God Bless Us All
Clint Hamilton, Owner
http://OrpheusComputing.com
sales@xxxxxxxxxxxxxxxxxxxx
Tech-Assist Administration
http://tech-assist.org
techassist@xxxxxxxxxxxxx
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if replying to this email!!)
----- Original Message -----
From: <damon101@xxxxxxxxxxxxxx>
To: "TechAssist" <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, October 09, 2001 8:24 AM
Subject: [TechAssist] Hitachi 60sx1k -AP 14 chassis. Big Pix
Bending, poor sync
Hello everyone,
Recently worked on a Hitachi PTV ap14 chassis with darker
than normal picture, no or erratic vertical sync and
horizontal bending only at the bottom 1/3 or top 1/3 (not at
the same time).
I tested the sync signal at the vertical output and horiz
drive using the NTSC generator and found that they were
locked to the generator. Also tested the power supply and
found about 2 volts of ripple on C952, C957 & C958. Gonna
replace those caps...
I checked the PIP and here is my concern: The small Picture
is not present using video 2 (Pip's main source is only Video
2) and is replaced by a green field. Video 2 is present on
big picture so the failure point must be in the PIP. The
customer doesn't care to have the PIP replaced unless it
fixes his scrambled Big Picture. Has anybody seen the Big
Picture lose sync in the Pip? Yet the horiz/vert outputs are
locked to the sync. Slightly weird set of symptoms, I would
have guessed bad sync at the outputs and looked at power
supply, or the video jungle IC for starters. Any help would
be appreciated, I only get 2 or 3 Hitachi units a year.
Thanks in advance,
Damon Brunger
damon101@xxxxxxxxxxxxxx
Telrad Electronic Services
Ft Wayne, IN 46815
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