[TechAssist] Re: sony kp46s15 shutdown
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 25 Nov 2003 15:38:25 -0500
Check out the following:
Last Update
10/8/2001 Event ID
E08912882 Model
KP46S15
Subject
SHUT DOWN - TWO SEPARATE PROBLEMS, AUDIO OUTPUT & FLYBACK
SYMPTOMS
Immediate shut down.
RESOLUTION
Initially found a dc offset on audio output causing the shut down problem.
Replacement of the audio output restored operation. However, after a few
hours the unit shut down agian. This time the flybackk was running hot and
causing the problem. Replacement of the flyback resolved problem.
Replace audio output and flyback. Dual failure has been reported more than
once in my area. FBT 8-598-939-00 audio output 8-759-190-89.
---------------------------
If not those, replace C663 (100mfd/35V) and C667 (470mfd/25V) in power
supply "G" board. You may have a bad jungle IC (the infamous CXA1477AS, Sony
part# 8-752-063-50). You can disconnect CN802 on the "E" board. If the set
stays up, you most likely have a bad video driver IC on one of the CRT
boards. If not, disconnect CN624 on the "G" board. If set stays up, you most
likely have a bad audio amp IC. If not, disconnect CN1757 on the "D" board.
If set stays up, you most likely have a bad convergence amp IC. If not,
remove the 3 CRT boards. If set stays up, you most likely have a bad CRT.
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@xxxxxxxxxxxxxxxx
geminitv@xxxxxxx
www.geminicomputertvsecurityalarms.com
----- Original Message -----
From: "repair1" <repair1@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, November 25, 2003 2:35 PM
Subject: [TechAssist] sony kp46s15 shutdown
> kp46s15, unit was going into shutdown no sound of hv, removed lead from
> splitter good arc, replaced splitter, now hv comes up and shuts down,
reason
> is b+ instead of 135v is 242v, I cant believe ps does not self destruct,
any
> help would be greatly appreciated.
>
> charles betzler
> Best Electronics
> repair1@xxxxxxxxxxxxx
>
>
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