[TechAssist] Re: [Fwd: RCA CTC169CA,F27203WN.SMPS has raspy noise in stby: C4104 question]
- From: Jim Hester <jhester42@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 29 Oct 2001 13:26:53 -0800 (PST)
Hi. Check to see if chopper is running hot in standby;
if so, R & R C4108, either 47 OR 39uf, located in
snubber circuit, just to the inner left of chopper
heatsink. Good luck.
Jim Hester
--- Phil Bader <philbad@xxxxxxxxxx> wrote:
>
>
>
> -------- Original Message --------
> Subject: RCA CTC169CA,F27203WN.SMPS has raspy noise
> in stby: C4104
> question
> Date: Mon, 29 Oct 2001 10:46:19 -0500
> From: Phil Bader <philbad@xxxxxxxxxx>
> Organization: Jan Phyl TV Inc. Winter Haven, Fl.
> Estab. 1976
> To: "CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx"
> <CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx>
>
> The SMPS is audibly raspy in standby,and under power
> it disrupts the
> picture stability. I pulled lytic C4104 near the
> SMPS IC, a 15 MFD @
> 50V. It measures 15 mfd and the ESR was about 5
> ohms, but was visably
> leaking fluid. Question. 15 mfd is an "off" value.
> Can I use ,say, a 22
> mfd? Of is there a time constant issue here? I will
> alsi change out the
> other, C4102 (2.2@100V) as usual.
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