[TechAssist] Re: Philips 26PW6341/37 no power up
- From: "Robert McPherson" <rm502@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 24 Nov 2005 07:34:58 -0500
Barry: I found these two paragraphs about your chassis. Maybe It will
help.
" Model 32PT5441/37. Chassis L04.1U A...
These sets need the F.E.T. (7404) replaced as well as two resistors
>> changes.
>> (3239) from a 2.7K to 1.2K and (3414) from a 1 ohm 2 watt to a 4.7 ohm 2
>> watt.
>> These also have problems with the HDT shorting and the vertical fuse
>> opens
>> (right behind and to the left of the fly.
I have typical checks at the HOT I had B+ on the collector but no drive.
Backtracking to the Horiz. driver transformer, I had about 4 volts to the
Horiz. driver. Obviously too low. My source for this supply was the FET
7404. It turned out to be the culprit. Magnavox offers a kit for this. 4835
310 57673. It includes the FET 7404, Resistor 3239, Horiz. driver
transformer 5402, 3 3414 resistors to choose from depending on the model,
and the installation note. Installing this kit took care of the problem.
Robert McPherson
McPherson Electronics
Email rm502@xxxxxxxxxxxxx
----- Original Message -----
From: "Barry" <foxhole@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, November 23, 2005 12:39 PM
Subject: [TechAssist] Philips 26PW6341/37 no power up
this L04.1UAA chassis has 6v standby and 135Volt sterts for an instant then
shuts down. The H out transistor and the regulator are not shorted, has
anyone had this problem?
Barry MacInnes
Television Service Clinic
2 Church St. W.
W. Lebanon,NH 03784
foxhole@xxxxxxxxx
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