[TechAssist] Re: Philips 27TS57 (C101) lost high channels
- From: "Damon" <damon101@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 28 Nov 2004 06:40:37 -0500
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
adjust the tuning voltage....time for a new tuner.
Damon Brunger
Telrad Electronics
Ft. Wayne, IN
----- Original Message -----
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 =
> 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 =
> tried
> another set on the cable and it worked fine so it's not a cable issue. =
> When
> I set in 51 into the scan memory, channel 51 shows the exact same =
> program as
> 50, as though the tuning voltage was "stuck". When I go to channel 65, =
> there
> is just snow. The lady is very patient, and I told her I'd do some =
> research
> and get back to her. I wrote down all of the option bytes and settings =
> while
> I was there.
>
> I don't have the exact service manual, but I'm suspicious that maybe a =
> 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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