[TechAssist] Re: Zenith B25A24Z (9-2066-3) open FX3402 caused no +5V stby, other?
- From: "Lynn C. Hedspeth, CET" <HedTV@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 30 Aug 2004 09:26:38 -0400
In these cases I usually find the Audio Output IC is defective.
You will have audio, but the IC will overheat and either fail later
or the audio will distort after it gets to an extreme temp.
I have no answer for why the audio output IC is effected by
a surge from the power, but I have found this to be the case
about 80-90% of the cases where this fuse has blown, and
replacing it gets the set up and running. Just make sure the
IC is not running hot before you send it home.
Have a great day,
**********************************
Lynn C. Hedspeth, CET
Hedspeth Enterprises Inc.
3521 E. Hwy 27
Lincolnton, NC 28092-7659
Phone: 704-735-3532
*********************************
----- Original Message -----
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Saturday, August 28, 2004 11:44 AM
Subject: [TechAssist] Zenith B25A24Z (9-2066-3) open FX3402 caused no
+5V stby, other?
> This unit was dead.Storm she claims.
> Plug in and hear the typical "chirp" of the SMPS. Had +135V at HOT
> collector in stby. No power on or click because no +5V standby volts
> found. I located an open B+ fuse soldered in next to the SMPS
> transformer.FX3402 (3.0amp GMA).
> Replacing it restored my +5V standby, and normal TV operation.
> My question is, do these ever open with no other damages?
> Is there any histories on this?
> Phil Bader
>
> --
>
> 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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