[TechAssist] [Fwd: Proscan PS27151 (RCA,CTC169CE2)dead no shorts]
- From: Phil Bader <philbad@xxxxxxxxxx>
- To: "techassist@xxxxxxxxxxxxx" <techassist@xxxxxxxxxxxxx>
- Date: Wed, 19 Sep 2001 14:49:54 -0400
-------- Original Message --------
Subject: Proscan PS27151 (RCA,CTC169CE2)dead no shorts
Date: Wed, 19 Sep 2001 14:48:26 -0400
From: Phil Bader <philbad@xxxxxxxxxx>
Organization: Jan Phyl TV Inc. Winter Haven, Fl. Estab. 1976
To: "CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx"
<CONSUMERELREPAIR-L@xxxxxxxxxxxxxxxxxxxx>
No squeel in stby,HOT OK, all diodes around HOT OK,Fuses OK.U4101 SMPS
IC has most all voltages except pin 14 (to base of Reg Q4101) which is
zero. I changed U4101 and Q4101 as test. Plug in and I hear a very faint
tic,tic,tic(exactly three).Still dead and no response with remote or
power button.Changed the 'lytics around the U4101 area.The 2 watt
resistors nearby all OK. Has Vcc on U4101. Zero volts on HOT collector
in stby.CR4118 OK. U 4101 seems to have what it needs,just
unresponsive.On one U4101 pin my fluke shows the analog bar in the
digital display as pulsating up and down at 1 sec rate.Changed D4118 as
test. (I'm stumped).-Phil
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