[TechAssist] Re: Zenith 20", 1983 model, 9-181 main module, volume cuts out.

  • From: gulftech@xxxxxxxx
  • To: techassist@xxxxxxxxxxxxx
  • Date: Fri, 1 Jul 2005 16:08:35 -0500

Kevin,

That sounds like either a bad coupling cap or bad chip.

Put your signal tracer on the audio input pins of the output IC.  See if
that level changes when the output does.  Better yet, hang a scope there.


Ken Smith
Gulf Technical Services
3034 Gulf Breeze Parkway
Gulf Breeze, FL  32563
850-934-8324 (Voice) 850-932-0819 (Fax)

On Fri, 01 Jul 2005 12:23:33 -0700 Kevin's TV Repair <kevintv@xxxxxxx>
writes:
> Up volume button.  It's like there is a bad connection and increasing
> the volume increases the voltage, which repairs the bad connection
> temporarily.    
> 
> Kevin Wilks
> Kevin's TV Repair
> Penticton BC Canada 
> kevintv@xxxxxxx
> 
> 
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Phil Bader
> Sent: Friday, July 01, 2005 11:46 AM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: Zenith 20", 1983 model, 9-181 main module,
> volume cuts out.
> 
> Up volume button or a volume knob?
> Phil
> 
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
> 
> 
> 
> Kevin's TV Repair wrote:
> 
> >I have been so busy I haven't been able to get back to this dog.  I
> >still may need the Audio IC, but I don't know.  Right now the audio
> >works 95% of the time and the only way to get it to come back on 
> when
> it
> >does fail is to turn the volume up a little.
> >
> >Kevin Wilks
> >Kevin's TV Repair
> >Penticton BC Canada 
> >kevintv@xxxxxxx
> >
> >
> >-----Original Message-----
> >From: techassist-bounce@xxxxxxxxxxxxx
> >[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Bob@bobsTV
> >Sent: Friday, July 01, 2005 6:27 AM
> >To: TechAsist M
> >Subject: [TechAssist] Re: Zenith 20", 1983 model, 9-181 main 
> module,
> >volume cuts out.
> >
> >Kevin,
> >        Am I to assume your all set on the Zenith and have no need 
> for
> >the
> >audio chip?
> >Bob.
> >
> >Bob's TV    Worcester, ma
> >
> >woodman17@xxxxxxxxxxx
> >
> >
> >
> >----- Original Message ----- 
> >From: "Bob@bobsTV" <woodman17@xxxxxxxxxxx>
> >To: <techassist@xxxxxxxxxxxxx>
> >Sent: Monday, June 27, 2005 9:19 AM
> >Subject: Re: [TechAssist] Re: Zenith 20", 1983 model, 9-181 main
> module,
> >volume cuts out.
> >
> >
> >  
> >
> >>Kevin,
> >>        Could not find model with that combo of modules.. But 
> found
> >>    
> >>
> >many
> >  
> >
> >>notes about erratic speakers...I also found 2 of the audio chips
> >>    
> >>
> >A9982-00
> >  
> >
> >>(stamped on heat sink) If you want one let me know I will send it 
> at
> >>    
> >>
> >n/c...
> >  
> >
> >>Bob.
> >>
> >>Bob's TV    Worcester, ma
> >>
> >>woodman17@xxxxxxxxxxx
> >>
> >>
> >>
> >>----- Original Message ----- 
> >>From: "Kevin's TV Repair" <kevintv@xxxxxxx>
> >>To: <techassist@xxxxxxxxxxxxx>
> >>Sent: Friday, June 24, 2005 6:08 PM
> >>Subject: [TechAssist] Re: Zenith 20", 1983 model, 9-181 main 
> module,
> >>    
> >>
> >volume
> >  
> >
> >>cuts out.
> >>
> >>
> >>    
> >>
> >>>I smacked it good everywhere.  When I first got the set I whacked
> >>>      
> >>>
> >the
> >  
> >
> >>>side really hard and the volume came back.  But now my problem is
> >>>      
> >>>
> >the
> >  
> >
> >>>set is working most of the time.  The other modules are 175-2034,
> >>>9-246-01, 9-186-05.  I can't find any other numbers after the 
> 9-181.
> >>>The audio IC is on the 9-181 module.  I would like to repair this
> >>>      
> >>>
> >set
> >  
> >
> >>>because it has a very nice picture for an older TV.
> >>>
> >>>Kevin Wilks
> >>>Kevin's TV Repair
> >>>Penticton BC Canada
> >>>kevintv@xxxxxxx
> >>>
> >>>
> >>>-----Original Message-----
> >>>From: techassist-bounce@xxxxxxxxxxxxx
> >>>[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Bob@bobsTV
> >>>Sent: Friday, June 24, 2005 12:45 PM
> >>>To: techassist@xxxxxxxxxxxxx
> >>>Subject: [TechAssist] Re: Zenith 20", 1983 model, 9-181 main 
> module,
> >>>volume cuts out.
> >>>
> >>>Do you have other module numbers? That 9-181 had  so many 
> variations
> >>>01
> >>>thru 18 if I remember.. Some of those sets did not even use the
> >>>      
> >>>
> >audio on
> >  
> >
> >>>the
> >>>9-181.. Before you spin your wheels sub another speaker.. Had an 
> old
> >>>      
> >>>
> >RCA
> >  
> >
> >>>that the sound went off but turning sound way up it returned...
> >>>      
> >>>
> >Voice
> >  
> >
> >>>coil
> >>>would catch on the magnet at regular volume but turning up sound 
> it
> >>>released.
> >>>Bob.
> >>>
> >>>Bob's TV    Worcester, ma
> >>>
> >>>woodman17@xxxxxxxxxxx
> >>>
> >>>
> >>>
> >>>----- Original Message ----- 
> >>>From: "Kevin's TV Repair" <kevintv@xxxxxxx>
> >>>To: <techassist@xxxxxxxxxxxxx>
> >>>Sent: Friday, June 24, 2005 3:31 PM
> >>>Subject: [TechAssist] Re: Zenith 20", 1983 model, 9-181 main 
> module,
> >>>volume
> >>>cuts out.
> >>>
> >>>
> >>>      
> >>>
> >>>>Yes it does have a remote, but I can't find the model number on
> >>>>        
> >>>>
> >the
> >  
> >
> >>>bell
> >>>      
> >>>
> >>>>of the crt.
> >>>>
> >>>>Kevin Wilks
> >>>>Kevin's TV Repair
> >>>>Penticton BC Canada
> >>>>kevintv@xxxxxxx
> >>>>
> >>>>
> >>>>-----Original Message-----
> >>>>From: techassist-bounce@xxxxxxxxxxxxx
> >>>>[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Bob@bobsTV
> >>>>Sent: Friday, June 24, 2005 12:17 PM
> >>>>To: techassist@xxxxxxxxxxxxx
> >>>>Subject: [TechAssist] Re: Zenith 20", 1983 model, 9-181 main
> >>>>        
> >>>>
> >module,
> >  
> >
> >>>>volume cuts out.
> >>>>
> >>>>Is this a remote set? There may be a model number sticker on the
> >>>>        
> >>>>
> >bell
> >  
> >
> >>>of
> >>>      
> >>>
> >>>>crt..
> >>>>Bob.
> >>>>
> >>>>Bob's TV    Worcester, ma
> >>>>
> >>>>woodman17@xxxxxxxxxxx
> >>>>
> >>>>
> >>>>
> >>>>----- Original Message ----- 
> >>>>From: "Kevin's TV Repair" <kevintv@xxxxxxx>
> >>>>To: <techassist@xxxxxxxxxxxxx>
> >>>>Sent: Friday, June 24, 2005 3:10 PM
> >>>>Subject: [TechAssist] Zenith 20", 1983 model, 9-181 main module,
> >>>>        
> >>>>
> >>>volume
> >>>      
> >>>
> >>>>cuts
> >>>>out.
> >>>>
> >>>>
> >>>>        
> >>>>
> >>>>>Sorry I don't have the model number for this one.  The volume
> >>>>>          
> >>>>>
> >will
> >  
> >
> >>>>>disappear after several minutes or hours and no amount of
> >>>>>          
> >>>>>
> >tapping or
> >  
> >
> >>>>>banging will bring back the sound.  If I raise the volume it
> >>>>>          
> >>>>>
> >will
> >  
> >
> >>>>>finally come back on again.  I inspected the sound circuit for
> >>>>>          
> >>>>>
> >cold
> >  
> >
> >>>>>solders and found none.  Any other ideas on this oldie but
> >>>>>          
> >>>>>
> >goodie?
> >  
> >
> >>>>>Kevin Wilks
> >>>>>Kevin's TV Repair
> >>>>>Penticton BC Canada
> >>>>>kevintv@xxxxxxx
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>          
> >>>>>
>
>-----------------------------------------------------------------------
> -
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