[TechAssist] Re: [Fwd: Proscan PS27151 (RCA,CTC169CE2)dead no shorts]
- From: "albert marquardt" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 19 Sep 2001 22:10:06 -0700
try unplugging high voltage block
al marquardt
ampm@xxxxxxx
----- Original Message -----
From: Phil Bader <philbad@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, September 19, 2001 11:49 AM
Subject: [TechAssist] [Fwd: Proscan PS27151 (RCA,CTC169CE2)dead no shorts]
>
>
>
> -------- 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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