[TechAssist] Re: Sony KV-32FS12 no 5V standby (dead)


I have IC002 failing a few time.
I use Sony replacement only.
Never had problems with the
CPU.

I think you should replace the IC002 again
with the original.

If you need the schematic, let me know.
Good Luck.
Panday





>From: "Lynn C. Hedspeth, CET(r)" <HedTV@xxxxxxxxxxxxx>
>Reply-To: techassist@xxxxxxxxxxxxx
>To: techassist@xxxxxxxxxxxxx
>Subject: [TechAssist] Sony KV-32FS12 no 5V standby (dead)
>Date: Thu, 30 Jan 2003 17:28:46 -0500
>
>
>Sony KV-32FS12
>
>Set will not turn on because it has no 5v standby. IC002 is the standby
>regulator IC and it has a good supply to pin 4 (input), but 0v on pin 5=
>  (output).
>I replaced IC002 but still no standby 5V.
>
>I can input 5v at pin 5 and the set will play. I have even jumpered from=
>  pin 4 to
>pin 5 with a 120ohm resistor to limit the current and check for loading,=
>  and it
>still plays fine.
>
>Short of deciding that the new IC002 is defective, does anyone have any=
>  other
>suggestions. (I ordered the OEM Sony part number 875966329)
>
>Just for info, the voltages are exactly correct with the 120ohm resistor 
>in=
>  place.
>7.5v pin 4
>5v pin 5.
>
>There is no 5v reset on pin 2 of IC002 (0V), but neither the micro or the=
>  couple of other
>components hooked to pin 2 is loading it down. And since this voltage is=
>  supplied internally
>by the IC, I am assuming this just a secondary issue related to the 
>missing=
>  standby 5v.
>
>
>Thanks in advance for any help.
>****************************************
>Lynn C. Hedspeth, CET NC-407
>Hedspeth Enterprises Inc.
>3521 E. Hwy 27
>Lincolnton, NC  28092-7659
>704-735-3532
>413-828-0216 (fax)
>HedTV@xxxxxxxxxxxxx
>***************************************
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