[TechAssist] Re: update2: RCA P60752EB, PTK169PEC intermittant video:goes black, has sound

  • From: Phil Bader <tjanphyl@xxxxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Fri, 22 Apr 2005 18:22:01 -0400

Swapped the wires back to the old PIP and problem returned at once. I 
have another PIP module from another 169 but looks a bit smaller in size 
to the customer's. I plugged it in to see. It has same connectors and it 
works with this chassis perfectfully. Watching it now, good picture...
Phil Bader

Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821
email: tjanphyl@xxxxxxxxxxxxxxx



Phil Bader wrote:

>This PIP board looks perfectly clean. I wonder if one of the ICs are 
>noisey. Caps look clean and ESR good. No ring cracks, tho I resoldered 
>the cable pins before reassembly. Well it's bad I guess anyway.
>Tritronics shows two PIP modules in this set:
>"S-PIP PCB"  207824 inactive part, and
>"S-PIP MICRO PCB" 207818 not  available, can be ordered.
>Which one is this one of mine? On the TV's insert paper, it calls it the 
>"3XXX SPIP".
>Phil
>
>Philip Bader
>Jan Phyl TV Inc. (estab. 1976)
>3420 Recker Hwy. Winter Haven, Fl. 33880
>Fax (863) 299-8821
>email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
>tvservice wrote:
>
>  
>
>>If you and the customer are satisfied with picture quality it is OK to leave
>>bypassed.
>>I have found bypassing this PIP circuit usually gives a poorer picture but
>>most people may not see it.
>>
>>
>>----- Original Message ----- 
>>From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
>>To: <techassist@xxxxxxxxxxxxx>
>>Sent: Friday, April 22, 2005 4:33 PM
>>Subject: [TechAssist] Re: update2: RCA P60752EB, PTK169PEC intermittant
>>video:goes black, has sound
>>
>>
>> 
>>
>>    
>>
>>>I just don't believe it. I did your bypass. The picture is stable as a
>>>   
>>>
>>>      
>>>
>>rock.
>> 
>>
>>    
>>
>>>I opened that PIP, removed the smaller board inside, looked all over,
>>>ESRd the lytics,etc. Found nothing. But I have to agree this seems to
>>>have done it. I wish I could just leave this bypass in place. Is it safe?
>>>I could give the customer a choice, with/without (if even available)
>>>I'll watch this awhile and see.
>>>Thanks, all for the help. Will advise.
>>>Phil Bader
>>>
>>>Philip Bader
>>>Jan Phyl TV Inc. (estab. 1976)
>>>3420 Recker Hwy. Winter Haven, Fl. 33880
>>>Fax (863) 299-8821
>>>email: tjanphyl@xxxxxxxxxxxxxxx
>>>
>>>
>>>
>>>tvservice wrote:
>>>
>>>   
>>>
>>>      
>>>
>>>>you can bypass PIP module for a test, at p8003 connector cut wire #1 and
>>>>     
>>>>
>>>>        
>>>>
>>#8
>> 
>>
>>    
>>
>>>>(chroma in and out) joint them. Do the same thing wire #3 and#6 (luma in
>>>>     
>>>>
>>>>        
>>>>
>>and
>> 
>>
>>    
>>
>>>>out).
>>>>Robert
>>>>tvservice@xxxxxxxxxxxxx
>>>>H & H Electronics Inc
>>>>
>>>>
>>>>----- Original Message ----- 
>>>>From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
>>>>To: <techassist@xxxxxxxxxxxxx>
>>>>Sent: Friday, April 22, 2005 11:30 AM
>>>>Subject: [TechAssist] Re: update2: RCA P60752EB, PTK169PEC intermittant
>>>>video:goes black, has sound
>>>>
>>>>
>>>>
>>>>
>>>>     
>>>>
>>>>        
>>>>
>>>>>Yes, even while video is black(with a bit of distorted parts), I can
>>>>>still hit menu and see the OSD, as well as that video output jack I
>>>>>mentioned is good. I noticed a lot of PIP mentions, but this is a very
>>>>>large PIP module, called "Spip-511". I don't think this is the one with
>>>>>the rubber feet that goo up.I opened it and theres a smaller PCB inside
>>>>>but no rubber.
>>>>>Phil
>>>>>
>>>>>Philip Bader
>>>>>Jan Phyl TV Inc. (estab. 1976)
>>>>>3420 Recker Hwy. Winter Haven, Fl. 33880
>>>>>Fax (863) 299-8821
>>>>>email: tjanphyl@xxxxxxxxxxxxxxx
>>>>>
>>>>>
>>>>>
>>>>>Larry E wrote:
>>>>>
>>>>>
>>>>>
>>>>>       
>>>>>
>>>>>          
>>>>>
>>>>>>Phil, does OSD/Menu work? TV video & Switched video both go through the
>>>>>>comb filter & spip module, check  C6445 in comb filter, it may be
>>>>>>         
>>>>>>
>>>>>>            
>>>>>>
>>cracked
>> 
>>
>>    
>>
>>>>>>         
>>>>>>
>>>>>>            
>>>>>>
>>>>or
>>>>
>>>>
>>>>     
>>>>
>>>>        
>>>>
>>>>>>have poor solder, value is 2700pf, Larry E
>>>>>>Larry Eastman
>>>>>>American TV & Electronics
>>>>>>Crystal River, Fl. 34428
>>>>>>----- Original Message -----
>>>>>>From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
>>>>>>To: <techassist@xxxxxxxxxxxxx>
>>>>>>Sent: Friday, April 22, 2005 9:51 AM
>>>>>>Subject: [TechAssist] update2: RCA P60752EB, PTK169PEC intermittant
>>>>>>video:goes black, has sound
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>         
>>>>>>
>>>>>>            
>>>>>>
>>>>>>>I went back and saw the cracked corner of main board and traces
>>>>>>>           
>>>>>>>
>>>>>>>              
>>>>>>>
>>around
>> 
>>
>>    
>>
>>>>>>>location A-26. I repaired two traces but I still have this
>>>>>>>vertical-video flashing.
>>>>>>>Note: I hooked up my VP301 pattern gen to  the set's composite "video
>>>>>>>in-1" and my pattern shows the disturbance. S-video input shows it as
>>>>>>>well but not quite as bad. Funny, but this set has a video output jack
>>>>>>>"video select out". I attached an RCA cable from that to my composite
>>>>>>>monitor. Picture is unaffected and good at all times from this output!
>>>>>>>So, wherever this jack pulls the video from the TV must be before the
>>>>>>>trouble. I am concentrating on vertical at this point. (help!)
>>>>>>>Phil Bader
>>>>>>>
>>>>>>>Phil Bader wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>           
>>>>>>>
>>>>>>>              
>>>>>>>
>>>>>>>>I pulled the chunk and benched it.Slid the main board out and
>>>>>>>>over,studied the bottom under high magnification. I found no cracks
>>>>>>>>mentioned or bad traces so far. What I did find was at the junction
>>>>>>>>where the yellow yoke wire solders to the board,( location terminal
>>>>>>>>             
>>>>>>>>
>>>>>>>>                
>>>>>>>>
>>ID
>> 
>>
>>    
>>
>>>>>>>>"E502" ) and R523, a distinct ring crack all around both wire and
>>>>>>>>resistor . Had to use good light and my nerdy magnifier hood with
>>>>>>>>             
>>>>>>>>
>>>>>>>>                
>>>>>>>>
>>both
>> 
>>
>>    
>>
>>>>>>>>lenses down! Tho I never actually saw a vertical collapse during the
>>>>>>>>effect, I bet  what I saw with the video flashing was the TV
>>>>>>>>safety-blanking the video as this connection arced.  Make sense? Will
>>>>>>>>let you know.
>>>>>>>>Phil Bader
>>>>>>>>
>>>>>>>>Phil Bader wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>             
>>>>>>>>
>>>>>>>>                
>>>>>>>>
>>>>>>>>>Customer said this intermittant problem happens more now:
>>>>>>>>>Sound stays OK.
>>>>>>>>>I've seen it: Video intermittantly sort of streaks, then goes,
>>>>>>>>>               
>>>>>>>>>
>>>>>>>>>                  
>>>>>>>>>
>>leaving
>> 
>>
>>    
>>
>>>>>>>>>               
>>>>>>>>>
>>>>>>>>>                  
>>>>>>>>>
>>>>a
>>>>
>>>>
>>>>     
>>>>
>>>>        
>>>>
>>>>>>>>>black screen. Not the HV,it stays... this is definately just the
>>>>>>>>>composite video picture. I'm testing this on the cable tuner input
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>               
>>>>>>>>>
>>>>>>>>>                  
>>>>>>>>>
>>>>now,
>>>>
>>>>
>>>>     
>>>>
>>>>        
>>>>
>>>>>>>>>not sure if it happens on any other inputs (just got here).
>>>>>>>>>I'm a tech from the 1970's and this looks like the symptom where a
>>>>>>>>>breakdown switch is dirty and you moved it causing the video to jump
>>>>>>>>>out, or a video peaking coil is opening. Kind of a static lines to
>>>>>>>>>               
>>>>>>>>>
>>>>>>>>>                  
>>>>>>>>>
>>the
>> 
>>
>>    
>>
>>>>>>>>>right across the screen then black.Any histories on video loss like
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>               
>>>>>>>>>
>>>>>>>>>                  
>>>>>>>>>
>>>>this
>>>>
>>>>
>>>>     
>>>>
>>>>        
>>>>
>>>>>>>>>on these? (intermittants like these are difficult to nail down)
>>>>>>>>>Phil Bader
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>               
>>>>>>>>>
>>>>>>>>>                  
>>>>>>>>>
>>>>>-------------------------------------------------------------------------
>>>>>       
>>>>>
>>>>>          
>>>>>
>>-
>> 
>>
>>    
>>
>>>>>>         
>>>>>>
>>>>>>            
>>>>>>
>>>>-
>>>>
>>>>
>>>>     
>>>>
>>>>        
>>>>
>>>>>>>           
>>>>>>>
>>>>>>>              
>>>>>>>
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>>>>>>
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