[TechAssist] Re: Philips TV Mod. 27PT6442 CHas. L04.1U AA, Noise lines, interference
- From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 15 Mar 2005 09:40:42 -0500
I have found freeze spray works on smaller components . If a symptom
takes longer to happen, and longer to cool down,I find it's usually a
heavier, bulkier part with more "thermal mass" (a rock Vs a pebble).
Suspect a flyback, large PS capacitor,etc. I lean towards a fly. I've
found a few in these chassis bad. Not dead short bad, just flakey.
Sometimes theinternak G2 circuit is unstable and causes shutdown,etc.
Phil Bader
peggs wrote:
>isn't this the chassis with the H. drive Transistor that goes bad.
>7404 a SM FET.
>look to see if the traces on 7404 are 'stressed' or discolored
>
>Peggs
>
>At 08:48 PM 3/14/05, Wally Heise wrote:
>
>
>>Hello,
>>
>>Philips Mod. 27PT6442, Chassis L04.1U AA
>>
>>Symptom: Came in dead, (AC line fuse barely melted); now have squiggly
>>noise lines running across the middle 4-6 inches of the crt, (horizontally).
>>These lines will disappear after 5-10 minutes of operation. The video is
>>OK, just moving back & forth. I have tried freeze spray to make it act up
>>again, no help, it generally shows up after TV has been powered down for a
>>few minutes. I have also moved all cables thinking it was interference,
>>this doesn't seem to help. Can not find anything that caused the fuse to
>>blow, another 4 amp seems to hold just fine.
>>
>>Anybody seen this or have any ideas? Is this Force 32 download that is
>>being discussed, free to repair shops?
>>
>>Thanks for any assistance.
>>
>>Wally Heise
>>South Isle Repair
>>Isle, Mn.
>>sirepair@xxxxxxxxxx
>>
>>
>>
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--
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx
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