how do i short 24c02wp eeprom chip

[mcross]

need to short 24c02wp eeprom chip in rca tv. stuck in firmware update screen. comes on by itself when plug in
mike

[Dang]

Re: how do i short 24c02wp eeprom chip

I have no idea if this is of use to you but seems interesting: http://www.engineersgarage.com/micro..._reset-circuit

[munirutech]

Re: how do i short 24c02wp eeprom chip

i think is pin 5 is 8

[Dang]

Re: how do i short 24c02wp eeprom chip

Data sheet for you: https://cdn.badcaps-static.com/pdfs/...823e53cf34.pdf.

[stj]

Re: how do i short 24c02wp eeprom chip

search "ponyprog"

[tom66]

Re: how do i short 24c02wp eeprom chip

Shorting an EEPROM is unlikely to resolve a firmware problem and could create further problems.

[Dang]

Re: how do i short 24c02wp eeprom chip

There is a memory reset but it seems specialist gear is needed, it's described in the PDF.

[Andrew F. Ali]

Re: how do i short 24c02wp eeprom chip

Here is my input-Hope it helps.
1. Determine the pin configuration for your particular EEPROM. Let's say Pin 5 is the SDA and Pin 8 is the VCC.
2. JoinPin 5-SDA and Pin 8-VCC with a jumper wire.
3. Power ON the TV and hold for 20 seconds. (Observe if a warning message appears on the TV screen.)
4. Disconnect the Pin 5-SDA connection.
5. Shut down TV.
6. Disconnect next end of the jumper from Pin 8-VCC.
7. Power On TV.

[tom66]

Re: how do i short 24c02wp eeprom chip

Jumpering an I2C bus to Vcc is a bad idea - it is an open collector bus so potentially you are shorting the supply rail. If anything jumper to GND/Vss

[selldoor]

Re: how do i short 24c02wp eeprom chip

Well I think it is pins 5 and 6 though no guarantee - at your own risk.

https://www.badcaps.net/forum/showthread.php?t=18199

[Andrew F. Ali]

Re: how do i short 24c02wp eeprom chip

Yes, indeed....Instead of jumping SDL pin to VCC pin you can jump SDL pin to GND pin and get the same result........and of course....no guarantee-at your own risk.
From my previous post #8 in Step 4 when the SDL conn ection is removed with the TV ON what will happen is the EEPROM will be updated with null values that TV could boot with.

[Andrew F. Ali]

Re: how do i short 24c02wp eeprom chip

Yes, indeed....Instead of jumping SDL pin to VCC pin you can jump SDL pin to GND pin and get the same result........and of course....no guarantee-at your own risk.
From my previous post #8 in Step 4 when the SDL conn ection is removed with the TV ON what will happen is the EEPROM will be updated with null values that TV could boot with.

Looking at the PDF posted for the 24C02/24C04 EEPROM Pin 8-VCC, Pin 4-GND and Pin 5-SDA

[mcross]

Re: how do i short 24c02wp eeprom chip

thanks guys, will post results
mike

[mcross]

Re: how do i short 24c02wp eeprom chip

I tried these steps and no change. now I did not tell all. I can use the remote and buttons to move between update and current software info, but can exit the menu. tv comes on when plug in by its self
mike

[selldoor]

Re: how do i short 24c02wp eeprom chip

so what does it do when you goto current software

[mcross]

Re: how do i short 24c02wp eeprom chip

just gives the info.no other options
Mike

[mcross]

Re: how do i short 24c02wp eeprom chip

have now tried all suggestion as above. does nothing different

[selldoor]

Re: how do i short 24c02wp eeprom chip

And when you press update software?
Before you try that does it update from Usb socket and if so have you got the latest software?

By the way the timing for shorting 5 and 6 is a bit tricky some people have tried it a number of times before a success.

[mcross]

Re: how do i short 24c02wp eeprom chip

And when you press update software?
Before you try that does it update from Usb socket and if so have you got the latest software?

By the way the timing for shorting 5 and 6 is a bit tricky some people have tried it a number of times before a success.

yes it does. firmware is no longer available to down load, first thing I did look for.,
will try 5-6 again
Mike

[mcross]

Re: how do i short 24c02wp eeprom chip

sorry , when press update software it looks for it, says none found
Mike