[TechAssist] Re: Panasonic CT20G22V AEDP275 dead blows D825
- From: MDileo0000@xxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Sun, 2 Nov 2003 06:26:55 EST
Peter,
The avalanche diode D825 is a critical component. When the regulator shorts,
the full doubled voltage, 330vdc, from the primary power supply will be
applied to the smps circuit and that diode clamps the overvoltage by shorting
intentionally. Also be sure to use the right regulator, it must be an
STR58041A, it
has a small dot on the case following the number, no "A". Absolutely no subs
for it.
Dominic DiLeo
Atlantic TV
Freeport, Maine
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
n a message dated 11/1/03 3:58:21 PM Eastern Standard Time,
oliver_peter1@xxxxxxxxxxx writes:
> Panasonic
> CT20G22V
> AEDP275
> MFD 1997
>
> I know that 20" TV don't warrent much these days. Need to
see
>
> if any one has seen this one yet. Problem Dead Set R825 is shorted it is a
> R2KL (TVSSR2KL). Had a R2KN which according to one refrence should be
> equivilent. Blew right way. The power supply is based on a STR58041. HOT
and
>
> FBt both test ok. Ideas, did check the electolitics in the regulator
> circuit.
>
>
> Peter Oliver
> Tucson Radio TV
>
> ____________________________
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