[TechAssist] [ Update ] RCA F35731MB CTC169JS6 - Shuts off when signalsource is connected.
- From: "LeRoy Westlund" <llw@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 30 May 2005 23:50:56 -0600
I lost some ground after working on the PiP module.
I replaced U4 (+5 volt reg.), & R72 (25 ohms).
Set still shut off.
The problem shifted a little. I lost my sound, and the Menu shifted too far
to the left.
Now I have to go back and change the Horz caps as needed, again.
In the meantime,.....does anybody have a good used PiP module for this
chassis ?
Numbers on module are: 506107, 2079001-011, & 4W81034-201.
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: LeRoy Westlund <llw@xxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
Date: Monday, May 30, 2005 9:43 PM
Subject: [TechAssist] Re: RCA F35731MB CTC169JS6 - Shuts off when
signalsource is connected.
>Damon,
>I already replaced the B+ cap. (470 @ 180).
>Right now, I am looking at the PiP module.
>R72 is overheated, and the +5 volt reg. IC4 may be bad.
>If I unplug P8002, the set will run with normal audio, but of course it has
>no picture, so it don't shut down. I'm going to try a new +5 volt reg. IC4
>on the PiP module.
>
>Later,
>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: Monday, May 30, 2005 8:48 PM
>Subject: [TechAssist] Re: RCA F35731MB CTC169JS6 - Shuts off when
>signalsource is connected.
>
>
>>Hmmm, I'm not sure if that Hi Voltage is normal or not. I've never tested
>>the normal value on this set.
>>200V is a little low, Cr4118's 12V should be 14V after replacement, and I
>>think you said the B+ run was at 140V, which is a little low too....not
>much
>>tho'.
>>
>>Put your meter on the 143V diode located near the SMPS. It's closer to the
>>SMPS than the back of the chassis, located kinda parallel to the Horiz
heat
>>sink. Monitor the voltage for a few minutes. If you see that voltage
>>fluctuate by several volts then the 143V cap is dried out......that
voltage
>>should be rock solid 143V during run at all times.
>>I have had that cap cause all sorts of shutdown/turn on problems, and I
've
>>just been seeing those go bad during the last 6 months.
>>
>>Damon Brunger
>>Telrad Electronics
>>Fort Wayne IN
>>----- Original Message -----
>>From: "LeRoy Westlund" <llw@xxxxxxxxxx>
>>To: <techassist@xxxxxxxxxxxxx>
>>Sent: Monday, May 30, 2005 9:03 PM
>>Subject: [TechAssist] RCA F35731MB CTC169JS6 - Shuts off when signal
source
>>is connected.
>>
>>
>>> John,
>>> The Hi-voltage reads 31K.
>>> The 200 volt source reads 191.8 volts.
>>> The screen reads 312 volts.( turning it down, does not help ).
>>> Picture Geometry is perfect. Picture is NOT bowed. Looks perfect.
>>>
>>> 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: John @ Myers TV <myers_tv_b@xxxxxxxxxxxxx>
>>> To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
>>> Date: Monday, May 30, 2005 7:07 PM
>>> Subject: [TechAssist] Re: RCA F35731MB CTC169JS6 - Shuts off when
>>> signalsource is connected.
>>>
>>>
>>> >Hi Leroy,
>>> >
>>> >What is your high voltage running at? Is the picture geometry OK? not
>>> >bowed in or out on the sides?
>>> >The next thing I would do is to change the rest of the horizontal
output
>>> >caps. Sorry, I don't have the part numbers here, but someone will
>>> >probably jump in with them. I think it is C4401, C4402, C4406)?
>>> >I'm thinking the timing of the hor output might be off.
>>> >
>>> >John Myers
>>> >Myers TV Service Co.
>>> >376 E. State St.
>>> >Alliance, OH 44601
>>> >
>>> >Voice / Fax: 330-821-6545
>>> >Myers_tv_b@xxxxxxxxxxxxx
>>> >http://www.myerstv.net
>>> >
>>> >Work as if you were to live a hundred years,
>>> >Pray as if you were to die tomorrow.
>>> > Ben Franklin
>>> >
>>> >
>>> >
>>> >
>>> >LeRoy Westlund wrote:
>>> >
>>> >>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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