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

  • From: Wayne Vanaman <Wayne@xxxxxxxxxxxxxxxxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Wed, 06 Jul 2005 07:31:01 -0500

Y3101 217322 8MHz.

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:
> 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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