[TechAssist] Re: Toshiba Projo Model TP55F81\TAC-9678 Chasis\in shutdn.
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 15 Jun 2005 14:26:55 -0400
I am 99.9 % certain that if you replace the convergence ICs, your set will
be fixed ( I realize it may not be exhibiting any convergence type symptoms
but you just have to trust me on this one). That set uses STK392-110 but I
would use good quality STK392-150 or STK392-180 as replacements (higher
power ratings aand far more reliable).
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxx
----- Original Message -----
From: "armando guerra" <birdie@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, June 15, 2005 2:35 PM
Subject: [TechAssist] Toshiba Projo Model TP55F81\TAC-9678 Chasis\in shutdn.
I am hoping that someone can give me their opinion on this problem .At
power up,high voltage comes up for a few sec.and then the tv shutsdn.Led
is blinking.To isolate the convergence ic's,I removed connector P712 and
F850 from the conv.\power bd and it still shutdn.I even removed the
conv.yokes from that bd and no go.Now,I removed all 3 crt bds,one at a
time with their respective yokes and still went into shutdn,so the crts
are not the problem.I replaced the vertical ic LA7833 since it can cause
shutdn but did not help.I unsoldered the audio ic LA4282 to see if that
was the cause and still no luck.Here is the only hint.No matter what
yoke (not convergence)I remove and fire the tv up,the high voltage comes
up and stay's there,will not shut dn.However,there is no pix or sound.At
first,I tought it was that particular yoke as I removed the conn but the
high voltage stay's up,no matter which of the 3 yokes I disconnect.I am
running out of idea's and my hair is getting whiter so I hope that
someone can help. Thanks for your help.
Mando
Birdie's TV & Electronics
Casa GRande,AZ
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