[TechAssist] Re: RCA CTC 187 menu disappears,volume works

  • From: Al L <alleathe@xxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Wed, 06 Jul 2005 08:17:53 -0400

Thanks Wayne and its Model F35673MB,CTC187CL3
----- Original Message ----- 
From: "Wayne Vanaman" <Wayne@xxxxxxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, July 06, 2005 7:53 AM
Subject: [TechAssist] Re: RCA CTC 187 menu disappears,volume works


> First a little about digital.
> The micro has an internal clock and outputs clock pulses.  The data
> pulses are synced to the clock pulses serially.  The other chips on the
> board look for the clock pulses.  Some sets have "enable" lines that go
> from the micro to certain other ICs to activate them.
>
> In you this case, go for the crystal.  I believe they had 4, 8, and
> 12MHz versions.  Without a MODEL NUMBER...AL...we can get too specific.
>
> Wayne Vanaman
> Omega Electronics
> 6904 W Fairfield Dr
> Pensacola, Fl.  32506-3310
>
> Wayne@xxxxxxxxxxxxxxxxxxxxx
> WWW.PensacolaTVRepair.Com
>
> 850-456-5995 voice
> 850-458-6369 fax
>
>
> Al L wrote:
>> I need to know if the micro and the T chip have their own separate clocks 
>> or
>> do they share one..
>>     The remote and infra red pick up produce pulses at the input of
>> micro,but when locked up,there seem to be no pulses on the clock pins of 
>> the
>> T chip,or micro.If I float the micro should I have clock pulses on one 
>> chip,
>> the good one?
>>    The buttons on front fire up the set,do volume,and produce the 
>> menu.About
>> the time I get to auto program,the menu disappears, and I am stuck with 
>> one
>> channel.Sometimes it turns off.
>>    Any ideas,or does someone have an old training manual for this 
>> set?TIA.
>>
>> Al Leatherman
>> 224 RT. 46
>> Mine Hill, NJ 07803
>> 973-361-5796
>> WWW.ALS-TV.NET
>>
>>
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