[TechAssist] Re: RCA F35755MB CTC179DK need INFO on micro kit
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 20 Dec 2004 14:46:12 -0500
Ok I'll try it. The reason I think it's the EPROM is that the micro keep
searching on turn-on. The data keeps flowing. I guess it could be the jungle
IC or the tuner but the tuner I figured caused this problem because
resoldering tuner let's the set turn on.
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- Original Message -----
From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, December 20, 2004 2:13 PM
Subject: [TechAssist] Re: RCA F35755MB CTC179DK need INFO on micro kit
> Your micro, -97E came before -97H so it is supposed to be replaced but
> that is just because of the error code problem. Does it really matter if
> it stores error codes? I would think the EEPROM could be replaced
> without replacing the micro if that is causing your problem. The Parts
> Finder program list the 229778 P/N for both U3101 and U3102 and is
> called a KIT so I thought that meant it included both the EEPROM and the
> Micro.
> *******************************************************************************************************************
> Since 1972
> Jim Myers
> Telrad Electronics
> Fort Wayne, Indiana
>
> al m wrote:
>> Thanks Jim but the kit only contains the EPROM is that all you need now?
>> Al Marquardt
>> ampm@xxxxxxx
>> Al Marquardt Electronic Repair
>> 206 W Main
>> Girardville Pa. 17935
>> ----- Original Message -----
>> From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
>> To: <techassist@xxxxxxxxxxxxx>
>> Sent: Monday, December 20, 2004 11:15 AM
>> Subject: [TechAssist] Re: RCA F35755MB CTC179DK need INFO on micro kit
>>
>>
>>
>>>Here's da poop: (The kit you need, 229782, is superseded by 229778)
>>>
>>>Symptom: A failure of an I2C bus device will prevent the TV from turning
>>>on. If a device has failed, its address
>>>is supposed to be stored in an error code area of the EEPROM, and
>>>displayed when the service
>>>mode is entered. On some early production sets, the error codes will not
>>>be stored.
>>>Cause: An error in the microprocessor code prevents the set from coming
>>>on in the service mode to
>>>display the error code. A bit in the EEPROM is set to prevent the
>>>microprocessor from checking for
>>>the error code.
>>>Cure: Replace both the microprocessor and EEPROM. For the CTC178 and
>>>CTC179 chassis, the
>>>microprocessor with the error is marked -97H or before. The
>>>microprocessor with the corrected code
>>>is marked -97I or later. For the CTC188 and CTC189 chassis, the
>>>microprocessor with the error is
>>>marked -98C or before and the microprocessor with the corrected code is
>>>marked -98D or later. Both
>>>the microprocessor and EEPROM must be replaced. The microprocessor and
>>>EEPROM come
>>>packaged together as a kit. Refer to the following table for the chassis
>>>to kit stock number cross
>>>reference.
>>>CTC178J, L 229782
>>>CTC179BJ, CJ, DJ 229780
>>>CTC179CK, CM, DK, DL 229782
>>>CTC188A 230055
>>>CTC189DA, DB 230055
>>>NOTE: To prevent having to align the chassis after replacing the EEPROM,
>>>record the values stored in the
>>>original part and use those values for the new part. If this is not
>>>done, the complete chassis and
>>>tuner alignments must be performed.
>>>
>>>
>>>
>>>*******************************************************************************************************************
>>>Since 1972
>>>Jim Myers
>>>Telrad Electronics
>>>Fort Wayne, Indiana
>>>
>>>al m wrote:
>>>
>>>>Does this set have to have the micro and the EPROM replaced together or
>>>>can
>>>>I just put in the EPROM. Set came in shutting down, then went to 3 tries
>>>>and
>>>>then shutdown, bending the board turned it on. Resoldering the tuner
>>>>fixed
>>>>the intermittent turn on but now it's stuck in video mode and the menu
>>>>won't
>>>>come up. I see Tritronics has a kit but it's NLA. Can I get by with just
>>>>the
>>>>EPROM? This set has a EPROM marked 97E which from tips I have says you
>>>>must
>>>>replace the two together. If so does anyone have a used micro and EPROM
>>>>for
>>>>the DK chassis? Thanks.
>>>>Al Marquardt
>>>>ampm@xxxxxxx
>>>>Al Marquardt Electronic Repair
>>>>206 W Main
>>>>Girardville Pa. 17935
>>>>
>>>>
>>>>
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>>
>>
>>
>>
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