301.013 single Can not Write to TSOP

[space_cowboy]

I've got a 301.103 single chip. I used as an FTA for about a year a recently decided to get my plastic going again.
I can read, backup and access the TSOP fine but anytime I try to erase or write to the TSOP I get error writing sector (whatever location i'm trying to write).
When I try to erase it flashes for about a second and acts like it's completed, even though nothing was erased. Vidmod has been performed and a year ago this box didn't give me any problems I must have reprogrammed between FTA and original Tsop files 5-10 times with no problem.
Any Idea what would allow me to read but not write this tsop?
Thanks,
-Space_Cowboy

[skinerd]

Are you grounding the R79 point?

[satman4928]

Sounds like the vidmod isn't enabled. I've made that mistake before. If you have a switch, check that its on

[skinerd]

Sounds like the vidmod isn't enabled. I've made that mistake before. If you have a switch, check that its on
That would not allow the last sector to erase/write, but the rest should. Sounds like he is not in link mode, that sometimes prevents all erase/writes.

[satman4928]

ah, I read that post too fast. Your right. I thought he said he could erase all but the last sector. I had that problem too, I think my R79 was not grounded like you said. Correct me if I'm wrong, but I just ran a wire from R79 to pin 19 (i think) of the parallel port jtag (the old version). On the computers I've tested, pins 19-25 are grounded so when you plug the jtag into the parallel port, the R79 pad is grounded. Seems to work for me but good luck

[skinerd]

ah, I read that post too fast. Your right. I thought he said he could erase all but the last sector. I had that problem too, I think my R79 was not grounded like you said. Correct me if I'm wrong, but I just ran a wire from R79 to pin 19 (i think) of the parallel port jtag (the old version). On the computers I've tested, pins 19-25 are grounded so when you plug the jtag into the parallel port, the R79 pad is grounded. Seems to work for me but good luck
Close.......pins 2-20 are ground......the even numbered ones.

9, 11, 13, 15, and 19 are the jtag port pins.

[satman4928]

Sorry, I was referring to the parallel port pins 19-25 being grounded at the computer

[space_cowboy]

R79 is grounded. with vidmod switch on I get the 12 volt. I think I left the vidmod enabled the past 6-9 months I was running as an FTA could that have screwed up the TSOP chip? I'm gonna resolder all connections tonight It just seems strange that I can read the tsop fine to back it up but I can not erase or program it. I'll post again to follow up.
Thanks for the suggestions. What is required to get this IRD into Link Mode.

- Space_Cowboy

[skinerd]

R79 is grounded. with vidmod switch on I get the 12 volt. I think I left the vidmod enabled the past 6-9 months I was running as an FTA could that have screwed up the TSOP chip? I'm gonna resolder all connections tonight It just seems strange that I can read the tsop fine to back it up but I can not erase or program it. I'll post again to follow up.
Thanks for the suggestions. What is required to get this IRD into Link Mode.

- Space_Cowboy

Groundng R79 is what causes it to boot from rom, ie link mode.

I don't know if leaving 12v on the flash for an extended period will hurt the flash chip or not, but I certainly would not chance it, just too easy to do it right.