[TechAssist] Re: RCA Chassis CTC169BG2 No Power

Mike, check all this below for shutting down.  Some of this
you may have already done, but I just pasted this from
another email.

replace CR4118, C4108, CR4402, C4402 & C4401
even if they check good.  Also check CR4101, CR4606,
CR4111, C4105, Q4101, CR4122, CR4123, R4150, R1928,
R4114, C4705, C4115, CR4709, C4145, C414, CR3101,
R4150, C4141, SCR501, CR4504, C4503, R3126, CR4303,
CR4710, C4145, Q4105, R4102, C3124, R4704, R4713,
Q3102, R4904, U4101, the yoke, pin of 12-13 of T4102
could be open, resolder L4803 & T4401, and possibly
L4702, U4801, U1902, Q4302 check for shorts (pin 1-3) in
U1901 If you are getting ~15v from the PS, IC3101 & Q4601
could be bad.  If it's down below 15v, replace C4145.
---------------------

For the color problem, R1431, R4307, R4701, R8224,
C8208, C8316, C8211, C8225, IC8203-1, C5801,
C2802, C2803, CF2301-3, L2804, Y8901 crystal, Q4702,
R6449, Q6415, C418, Q4107, CR1404 and possibly
SF2301.  Replace CR4115, CR4118 & CR4121.
-Clint

God Bless Us All
Clint Hamilton, Owner
http://OrpheusComputing.com
sales@xxxxxxxxxxxxxxxxxxxx
Fax: 209-882-9602
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----- Original Message -----
From: "Mike Barnett" <passthecash@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, November 13, 2001 12:15 PM
Subject: [TechAssist] RCA Chassis CTC169BG2 No Power




> Hey Guys,

Need some help w/ this one. Here's how it goes, Set came in
with
no power and loses color Intermit complaint. looked around
and did'nt find
anything out of the ordinary. I replaced the three caps in
chopper
curcuit(c4102,c4104,c4108) was also missing vcc run voltage
at pin 16 of
u4101, changed it too. re-assembled and set came up. unit was
running good
all voltages seem to be good with the exeption of cr4102 was
quite a bit
low. still had the intermit color. when changing channels it
take about 1
second to have colorand accationally the pic would go to b+w.
also then the
set would shut down losing 200v.. At pin 16 of u4101 still
had runvcc v but
missing3v at cathode of cr4102. even when the set was running
the voltage at

cr4102 is very low/about 1.5v. this is supposed to be 3vdc?
The set shut
down and now will not power up at all. Have 170 @ collector
of q4101 and 12v

at pin 16 of u4101. missng 200v from pin 10 of fly and
checked r4703.
checked pin 16 on ICu1001 for 5.7vdc and is missing, checked
Q2906 it was
good but i changed it anyway with ECG288. Still didn't fix.
Have 180v at
collector of Q4402 and cr4401.
Changed horizonal retrace cap c4401 and changed c4402 and
cr4403.
CAN ANYONE HELP WITH THIS??? I'm Going outa my mind.

TIA
Mike Barnett


>
>
>
>
>
>
>  Get It Fixed At
>  Rochester Electronics
>  630 West Ridge Rd.
>  Rochester, NY 14615
>  716.663.6870
>  www.RochesterElectronicsRepair.com
>
>
>
>
>
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Get It Fixed At
Rochester Electronics
630 West Ridge Rd.
Rochester, NY 14615
716.663.6870
www.RochesterElectronicsRepair.com





_______________________________________________________
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