This one is for BravoV. I have the same vertical geometry problem you had [the words are too low to read]
You said that you adjusted the vertical readout trimpot.
I cant find this "vertical readout trimpot" in the schematics or troubleshooting. I cant even find those words in a 2445B or 2465B service manual.
Could you tell me what R number you adjusted?
Wondering if anyone has attempted to hand-copy cal constants using the "Calibration RAM Examine" thingie in the exercisers (or has at least verified that they are stored as shown in the RAM)...
Cool -- though do you know whether the constants can just be copied into a new IC and have it work?
The calibration constants from exercise 2 are located at addresses 1E00 - 1FFF in the NVRAM. I don't know if they can be used with another dump. Maybe I will try just out of curiosity. Maybe I will able to tell which constants are for vertical calibration when I calibrate the vertical.
I will post some pictures of the process when all the tasks are done.
Update: I have just tried a 2465B S/N B05xxxx dump on my 2445B S/N B06xxxx with my original calibration constants. It works flawlessly! So, it is a good idea to backup your constats from exercise 2 before you do anything with the NVRAM chip. It can save you a calibration if something goes wrong when you try to read your NVRAM after desoldering.
Malch, remember, I'm NOT the expert on this problem, and "maybe" my method is not the right way to fix this problem. So proceed with your own risk.
My suggestion, read the service manual, and understand what these 2 pots do. Also use a sharpie/marker to mark the current position at the pot, so if you suspect you screwed up while adjusting these pots, you can turn it back to the previous position.
1E: reset status
--- DS1225Y NVRAM copy programmer ---
Select:
[R]ead NVRAM into PIC flash
[V]erify NVRAM with PIC flash
[W]rite PIC flash to NVRAM
erase PIC [F]lash
erase [N]VRAM
[B]lank check PIC flash
fill NVRAM with ran[D]om data
fill PIC flash with rand[O]m data
[P]rint NVRAM contents
print PIC f[L]ash contents
get [C]hecksums
> R
Erasing flash...
Reading 1F00
Read completed.
Verifying 1F00
Verify completed: success.
--- DS1225Y NVRAM copy programmer ---
Select:
[R]ead NVRAM into PIC flash
[V]erify NVRAM with PIC flash
[W]rite PIC flash to NVRAM
erase PIC [F]lash
erase [N]VRAM
[B]lank check PIC flash
fill NVRAM with ran[D]om data
fill PIC flash with rand[O]m data
[P]rint NVRAM contents
print PIC f[L]ash contents
get [C]hecksums
> C
NVRAM checksum=0xF9AB
Flash checksum=0xF9AB
--- DS1225Y NVRAM copy programmer ---
Select:
[R]ead NVRAM into PIC flash
[V]erify NVRAM with PIC flash
[W]rite PIC flash to NVRAM
erase PIC [F]lash
erase [N]VRAM
[B]lank check PIC flash
fill NVRAM with ran[D]om data
fill PIC flash with rand[O]m data
[P]rint NVRAM contents
print PIC f[L]ash contents
get [C]hecksums
>
1E: reset status
--- DS1225Y NVRAM copy programmer ---
Select:
[R]ead NVRAM into PIC flash
[V]erify NVRAM with PIC flash
[W]rite PIC flash to NVRAM
erase PIC [F]lash
erase [N]VRAM
[B]lank check PIC flash
fill NVRAM with ran[D]om data
fill PIC flash with rand[O]m data
[P]rint NVRAM contents
print PIC f[L]ash contents
get [C]hecksums
> W
Writing 1F00
Write completed.
Verifying 1F00
Verify completed: success.
--- DS1225Y NVRAM copy programmer ---
Select:
[R]ead NVRAM into PIC flash
[V]erify NVRAM with PIC flash
[W]rite PIC flash to NVRAM
erase PIC [F]lash
erase [N]VRAM
[B]lank check PIC flash
fill NVRAM with ran[D]om data
fill PIC flash with rand[O]m data
[P]rint NVRAM contents
print PIC f[L]ash contents
get [C]hecksums
> C
NVRAM checksum=0xF9AB
Flash checksum=0xF9AB
--- DS1225Y NVRAM copy programmer ---
Select:
[R]ead NVRAM into PIC flash
[V]erify NVRAM with PIC flash
[W]rite PIC flash to NVRAM
erase PIC [F]lash
erase [N]VRAM
[B]lank check PIC flash
fill NVRAM with ran[D]om data
fill PIC flash with rand[O]m data
[P]rint NVRAM contents
print PIC f[L]ash contents
get [C]hecksums
>
Make sure you get "W" FRAM. FM18W08 or FM16W08. These lasts 100 times longer (10E14 cycles) then devices without "W" (10E12 cycles).
I have not seen "W" devices on eBay. And, I prefer to buy from well known reseller (Farnell, Digikey, Mouser) than eBay.
.... 16k years to wear the device out.
Are you sure...
Both are rated for 1014 operations.
No, they aren't. Look again.
Here's FM1608 datasheet:
http://www.farnell.com/datasheets/82469.pdf
And here is FM16W08 datasheet:
http://www.cypress.com/?docID=48242