[TechAssist] Re: RCA F35755MB CTC179DK need INFO on micro kit
- From: Jim Myers <jr.myers@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 20 Dec 2004 14:13:16 -0500
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Here's da poop: (The kit you need, 229782, is superseded by 229778)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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