[TechAssist] Re: Fixed: Philips 27PT543S37A dead
- From: Kevin <kevintv@xxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sun, 30 Jan 2005 13:29:21 -0800
That is an unusual failure. If all else checks out, it is always a good
idea to check the HOT out of circuit. I forget that sometimes and I end
up wasting time looking for the problem elsewhere.
Kevin Wilks
Kevin's TV & Video Repair
Penticton BC Canada
kevintv@xxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Peter oliver
Sent: Sunday, January 30, 2005 6:45 AM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Fixed: Philips 27PT543S37A dead
closer to zero, but since those are across the HDT detecting in circuit
without removing the transisitor is difficult.
Peter Oliver
Tucson Radio TV
From: Kevin <kevintv@xxxxxxx>
Reply-To: techassist@xxxxxxxxxxxxx
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Fixed: Philips 27PT543S37A dead
Date: Sat, 29 Jan 2005 22:45:59 -0800
Was the B-E short about 40 ohms, or was it zero ohms?
Kevin Wilks
Kevin's TV & Video Repair
Penticton BC Canada
kevintv@xxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Peter oliver
Sent: Saturday, January 29, 2005 8:36 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Fixed: Philips 27PT543S37A dead
In additon to the cap at 2455 that I had replaced found that the HOT had
been damaged in a way not easy to detect it appears that the internal
damper
network was shorted, B-E short so didn't show in circuit. The original
HOT
was a BU4508DF Subed a 2SD1880 worked good.
Peter Oliver
Tucson Radio TV
From: peggs <peggs@xxxxxxxxxxxxx>
Reply-To: techassist@xxxxxxxxxxxxx
To: techassist@xxxxxxxxxxxxx, techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: Philips 27PT543S37A dead
Date: Thu, 27 Jan 2005 10:49:17 -0800
from WinStips
1. 2455 Open (47uf/25v) Overheated 7461(Bc337-25/ 483513048147) 7463
(Bc327-25/ 319802043430)
Located By Horiz Driver Transformer 5461
2.Shorted Diode 6560 Located In Middle Of Board
Complete New Chassis Part # 313918715081 Only $41
3.Found That Crt Was Bad. Removed Crt Socket And Found That The Crt
Pins Would Draw A 4" Arc To A Grounded Screwdriver When The Set Is
On. Part # 930192560527, (A68qcv754x73n).
4.For Improved Reliability When Servicing The L01.1u Ac Chassis That
Uses
25 Inch And 27 Inch Standard Curved Face Crt'S Always Examine Capacitor
2462 Located Near The Base Lead Of The Horizontal Output Transistor
7460. If 2462 Is A Small Blue Or Orange Part Replace It With 2022 333
00084. Use No Other Part Here.
Peggs
At 06:02 PM 1/26/05, Peter oliver wrote:
>Philips
>27PT543S37A
>L01.1U
>MFD 2002
>
> Dead set. Have found bad cap at location 2455, 47uf 25v.
Still
>dead. Any additonal things that will commonly cause. customer sair
had
to
>push many times to get to come on now won't.
>
>Peter Oliver
>Tucson Radio TV
>
>
>
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