[TechAssist] Re: RCA F35731MB CTC169JS6 - Shuts off when signalsource is connected.
- From: "LeRoy Westlund" <llw@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 31 May 2005 09:51:48 -0600
NO, they are the base voltages,......the emitter voltage is .14 with no
signal, and .24 with a signal.
LLW
LeRoy Westlund
Westlund TV & Electronics
97 North Main " I forgot,..to remember,..
Centerfield, UT 84622-0087 to forget "
Ph./Fax 435-528-3822
mailto:LLW@xxxxxxxxxx
-----Original Message-----
From: DAMON BRUNGER <damoneb@xxxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
Date: Tuesday, May 31, 2005 7:32 AM
Subject: [TechAssist] Re: RCA F35731MB CTC169JS6 - Shuts off when
signalsource is connected.
>Isn't this the SMPS's emitter voltage?
><Voltage Q4101-Base = standby = -.19 ( Run = -1.4)>
>I wonder if it is.
>
>Damon Brunger
>Telrad Electronics
>Fort Wayne IN
>----- Original Message -----
>From: "LeRoy Westlund" <llw@xxxxxxxxxx>
>To: "TechAssist" <techassist@xxxxxxxxxxxxx>
>Sent: Monday, May 30, 2005 7:40 PM
>Subject: [TechAssist] RCA F35731MB CTC169JS6 - Shuts off when signal source
>is connected.
>
>
>> Hi members,
>> This set will run all day with raster only. As soon as I hook up a signal
>> source (Antenna, or external input), it will shut off after about 10
>> seconds. Picture is beautiful, and all voltages from the power supply
read
>> normal, for that length of time.
>> When it shuts off, I have to unplug the power for at least 5 minutes,
>before
>> my standby voltages will return.
>>
>> Parts replaced so far, with OEM part numbers :
>> Regulater chopper output. (200165)
>> Regulator IC (200419)
>> Regulator caps. (2.2 @ 100 195691),(15 @ 63 214756),(470 @ 35 190496),(39
>@
>> 100)
>> Horz cap (.48 @ 250 197518), CR4118 (164589), C4703 (47 @ 250).
>> B+ cap (470 @ 180 200147).
>> Tested luminance buffer Q2906= OK.
>>
>> Voltage readings:
>> B+ = standby = 143.2 (Run = 138.2)(adjusted B+ standby for 140, no help).
>> CR4118 = standby = 13.4 ( Run = 12.1)
>> Voltage Q4101-Base = standby = -.19 ( Run = -1.4)
>>
>> If I pull the CRT socket, set will run OK, and not shut-off.
>> Works the same on my 27" test jig in the shop, as it does hooked up in
the
>> home, to the original Yoke / CRT load combination.
>>
>> Would it be wise to replace the IFT at this stage of the game ? Customer
>> does not want to spend more then $200 for this repair. I may need to
>refund
>> about $100-165, that I already collected. It worked for about 1/2 hour
>when
>> I first took it back, but, it went out again after customer already paid
>me.
>>
>> Anymore help on this would be appreciated.
>> LLW
>>
>> LeRoy Westlund
>> Westlund TV & Electronics
>> 97 North Main " I forgot,..to remember,..
>> Centerfield, UT 84622-0087 to forget "
>> Ph./Fax 435-528-3822
>> mailto:LLW@xxxxxxxxxx
>>
>>
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