[TechAssist] Re: Philips 27TS57 (C101) lost high channels
- From: "Art Bevilacqua" <abevilac@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 15 Feb 2005 21:18:10 -0500
This lady is not in a hurry, she has another set, but I'd like to clear =
it
out.
We did try another tuner and that did not help, channels stop at 50. =
Tuner
voltages seem ok, the full 33Volts is present.
I was probing around with the service remote, and I am wondering whether
incorrect option bytes might be involved. Does anyone have a chart =
showing
the correct option bytes? Or any other ideas?
Thanks,
Arthur Bevilacqua
Essex Radio & TV
40 Main St
Essex, MA 01929
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Damon
Sent: Sunday, November 28, 2004 6:41 AM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Philips 27TS57 (C101) lost high channels
That sounds like your tuner took a Sxxx on you, seriously.....The =
data/clock
lines are likely ok, but the internal Ic cannot access the UHF band and=20
adjust the tuning voltage....time for a new tuner.
Damon Brunger
Telrad Electronics
Ft. Wayne, IN
----- Original Message -----=20
From: "Art Bevilacqua" <abevilac@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, November 27, 2004 8:54 AM
Subject: [TechAssist] Philips 27TS57 (C101) lost high channels
> Started as a "no startup" problem, found and replaced shorted vertical
> output IC and two 1 ohm resistors. After a day or so, the customer =3D
> called
> and said she couldn't get any channels above 50.
>
> I stopped by with a service remote, and couldn't get the high =
channels,
> either by auto programming or by manually setting in the channels. We =
=3D
> tried
> another set on the cable and it worked fine so it's not a cable issue. =
=3D
> When
> I set in 51 into the scan memory, channel 51 shows the exact same =3D
> program as
> 50, as though the tuning voltage was "stuck". When I go to channel 65, =
=3D
> there
> is just snow. The lady is very patient, and I told her I'd do some =3D
> research
> and get back to her. I wrote down all of the option bytes and settings =
=3D
> while
> I was there.
>
> I don't have the exact service manual, but I'm suspicious that maybe a =
=3D
> power
> supply voltage is off.
>
> Does anyone have any tips on this chassis, or a schematic?
>
> Thanks,
>
> Art Bevilacqua
> Essex Radio and TV
> 40 Main Street
> Essex, MA 01929
>
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