[TechAssist] Re: ctc169 power supply problem
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 09 Feb 2007 01:03:31 -0500
Here are some things I found:
RCA ctc169 dead (low b+ in standby) + (Primary voltages bouncing
around)
-Replaced c4101 ( Part tested good)
---------------------------------------------------------------------
RCA CTC169 dead low B+
-CR4101 checks good REPLACE anyway
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PROSCAN CTC169 low b+ raster short on four sides no video
-cr4115, cr4121
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RCA CTC169 NARROW PICTURE LOW B+
-REPLACE LEAKY C4136
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RCA CTC169 Set had low B+ of 118 volts. Raster was pulled in all 4
sides
-Q4111 transistor in power supply was open
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RCA
CTC169
PICTURE PULLED IN ON ALL (4) SIDES - LOW B+ AND NO COLOR
-CHECK/REPLACE Q4105 (P/N# 143802) OR ECG159 AND Q4107 (P/N# 146847) OR
ECG123AP
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RCA CTC169 Pic pulled in all sides. Reg B+ only 115V
-CR4111, 4.7V Zener
------------------------------------------------------------------------
Ray,
C4118 (470 mfd. 35 volt) will cause a low B+ symtom.
Paul.
-----Original Message-----
From: Ray Whitmoyer <repair@xxxxxxxxxxx>
To: servicetalk@xxxxxxxxxxxxxxxxxxx <servicetalk@xxxxxxxxxxxxxxxxxxx>
Date: Thursday, August 10, 2000 9:32 AM
Subject: [ServiceTalk] RCA CTC169 Projectiion TV
Came in dead, checked voltage @U4101, pulsing, found C4102 open
after replacing voltage steady on U4101, SB B+ @141 volts when you hit
power button B+ drops to about 88 volts momentarily and cuts back
off..anyone help?
Ray
-------------------------------------------------------------------------
Gary McCartney
McCartney Electronics
Guelph Ontario Canada
Est. 1984
email: gary (at) number63.ca
pete wrote:
> I have been stumpt on this one. 120 volts on horiz output transistor in
> standby. cr4118 has been replaced I dont have 15 volts on diode I cannot
> measure it fluctuates c4145 1000 micro 50 volts have been also replaced raw
> bplus is 160v on the money I have replaced c102,c108.c104 u101, and
> disconnected the audio. Any help will be greatly appreciated
> Pete
>
> Perdomo Tv Inc Since 1972
> Miami.Fl
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