[TechAssist] Re: [Fwd: Proscan PS27151 (RCA,CTC169CE2)dead no shorts]
- From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 19 Sep 2001 14:22:54 -0500
Here's a possibility Phil,
CHASSIS:
CTC169
PART:
R4715
CIRCUIT:
Low Voltage
PROBLEM:
Set would pulse three times and quit. The servicer isolated the
focus screen control and horiz circuit and they checked ok.
The servicer grounded q304 (collector) and high voltage came
up. The 9VDC regulator Q4704 was not working (base and
emitter were 0VDC). R4715 (200 ohm) was open.
SOLUTION:
Replacement of R4715 repaired the unit.
Jim Myers
jr.myers@xxxxxxxxxxx
----- Original Message -----
From: "Phil Bader" <philbad@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, September 19, 2001 1:49 PM
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
> Help make your TechAssist online repair tips
> database better! Submit your fixes here:
> http://www.circuitwork.com/techassist/tip/#tips
> To unsubscribe write to:
> techassist-request@xxxxxxxxxxxxx
> with unsubscribe in the subject line.
Help make your TechAssist online repair tips
database better! Submit your fixes here:
http://www.circuitwork.com/techassist/tip/#tips
To unsubscribe write to:
techassist-request@xxxxxxxxxxxxx
with unsubscribe in the subject line.
Other related posts:
