[TechAssist] Re: RCA TV CTC197AK2, menu button doesn't work
- From: Ralph Dorsey Atlas TV <Merlin-Wizard@xxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 16 Apr 2002 19:48:00 -0500
yes buy a new eeprom and set it up. take out the tuner and the other
setting first.
Ralph Dorsey
Atlas TV Inc.
3945 s 76th St.
Milwaukee.Wi 53220
414-545-2303
Gary McCartney wrote:
> I first posted this a few weeks ago, in case anyone remembers it. The
> set has been sitting in my shop waiting for parts since then. (customer
> was not in a hurry)
>
> At the time I had tried to reset the parental lock to allow the front
> panel MENU button to work but it didn't fix it. I have now replaced the
> eeprom and the menu function works again.
> I do not have a Chipper Checker (waiting to hear from my supplier on
> prices) to setup the new eeprom, so I'm hoping there is another way to
> work around it. I have taken Ted Nosal Jr.'s idea to compare the eeprom
> HEX files using my eeprom programmer but I can't tell what byte or bytes
> have been corrupted. Does anyone know off-hand what HEX address the
> faulty byte is located? Also, can I go into the parameters in the TV
> service menu and write down all the values and transfer them to the new
> eeprom that way?
>
> I can email printouts of the eeprom HEX files if anyone feels they would
> know by looking at them what to change.
>
> Thanks for any help.
>
>
> Gary McCartney
>
> McCartney Electronics
> 7134 Fife Rd, RR 7
> Guelph Ontario Canada N1H 6J4
> Fax: (519)821-1530
> email: number63@xxxxxxxxxxxxx
>
>
>
> My original message:
>
>
>
> Gary McCartney wrote:
>
>
>>This is my first repair of CTC197 chassis. Set came in dead. Replaced
>>HOT, flyback and a couple resistors and soldered the tuner. Works fine
>>now. Only problem is that the menu button on the front panel does
>>nothing. All the other front panel buttons operate normally.
>>
>>I measured continuity of the menu switch when closed- is ok. Followed
>>the switch path through R117 to the micro IC and all traces are ok. The
>>menu button on the remote does work as normal. I went into the parental
>>control and made sure the front panel buttons were enabled. Then I
>>disabled them and then re-enabled them again. No difference. The TV
>>guide and PIP seem to be ok.
>>
>>Is this an eeprom problem? If so, can I correct it without a Chipper
>>Checker? I do have a regular eeprom programmer if someone knows what
>>byte would need to be reset or whatever.
>>
>>One other question, I've read where there is an RCA bulletin to replace
>>a resistor and cap when flyback is changed. My flyback number is 237502.
>>It did not come with any bulletin regarding this. Does this mean my
>>version of the chassis is exempt from the alteration?
>>
>>Thanks for any help.
>>--
>>
>>Gary McCartney
>>
>>McCartney Electronics
>>7134 Fife Rd, RR 7
>>Guelph Ontario Canada N1H 6J4
>>Fax: (519)821-1530
>>email: number63@xxxxxxxxxxxxx
>>
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