[TechAssist] Re: [Fwd: RCA CTC169CA,F27203WN.SMPS has raspy noise in stby: C4104 question]
- From: "Jerry" <geiting@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 29 Oct 2001 19:43:09 -0500
Don't forget the +15 volt rectifier! Which I believe is still a 164590. If
I remember correctly, the 15 uf is the B+ filter for the regulator ic, but
I'm not sure of that without seeing the diagram, I'll look it up tomorrow.
Jerry
Christian's Electronic Service
----- Original Message -----
From: "Ralph Dorsey" <Merlin-Wizard@xxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, October 29, 2001 1:30 PM
Subject: [TechAssist] Re: [Fwd: RCA CTC169CA,F27203WN.SMPS has raspy noise
in stby: C4104 question]
|
| i repair about two of these a day right now and i always change the 2.2,
| the 15uf and the 39uf (or the 47uf) cap in ALL of these sets even if they
| didn't come in for that work. Five minutes now saves you hours later if
you
| have ot go back out. You can get the cap's from Digikey
|
| Phil Bader 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.
| > Help make your TechAssist online repair tips
| > database better! Submit your fixes here:
| > http://www.circuitwork.com/techassist/tip/#tips
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|
| Help make your TechAssist online repair tips
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