Does Anyone Have The Full Info On How To Mod A 3900 Receiver Into 2 X 2700?

[Homer J. Simpson]

does anyone have the info and files to convert a 3900 dishnet receiver into 2 x 2700 and make one bev and one dishnet? thanks.

[smilingjack]

I think what you want JT posted yesterday in detail

from JT's post

There is no firmware for a Bell 3900. Bell has never used the model 3900. The 3900 has a 2Mb tsop. The 2800's have a 512kb tsop. They are very different beasties. What you have to do to get a 3900 to work for bell is to take four 2800 tsop images and combine them into one 2Mb tsop image and write that to the 3900. It's a pain in the ass and not worth it if you ask me. Instructions on how to do this and pre-made images are available in the files section. Or. you can make a dual boot 3900 that will run both dish and bell on the same box. At one point in time, this was a neat trick because a guy could use two tsop images for Bell 2800 and two tsop images for a charlie 2800 and have one receiver that was pre programmed for both dish and bell, then install a toggle switch to go back and forth. Like I said, this is doable....just a lot of fiddling IMO and not worth it. The dual boot 3900 does not take firmware updates via the stream. To update the firmware the only option is to create an entirely new tsop image with the updated firmware and rewrite the entire tsop. I never liked the model 3900 anyway.

[barabbas]

From a Lutz Diagram post:

This project converts a dish model 3900 to a dual boot 2700 for
dish and bev with the same receiver, with a toggle switch to select
the provider you want.
I assume you already have a dish pointed at bev and another pointed
at dishnetwork. Good soldering skills, a sharp xacto knife, and
the ability to use DOS commands are required.
You will need a dish 2700 tsop and bev 2700c tsop, both with the same
build and bootstrap rev; (12AB or 12BB).
Edit the dish file with flashedit 2.0a.2, put in your ird#, boxkeys,
fix crc. Nothing else. Save as a personal dump. Do the same with the
bev bin. Also save a virgin eeprom with the 2700 build,ending in "D"
all capital letters.
Copy the dish bin to a directory on the hd, name the file 1.bin.
Copy the bev bin as 2.bin to the same directory.
Get into a DOS shell and change to the directory where you copied
the files. In that directory,type:
copy /b 1.bin+1.bin+2.bin+2.bin dual.bin
Dual.bin will be the 2meg file that is 1/2 dish and 1/2 bev.
Backup and full erase your tsop as a model 3900.
Program the tsop with the dual.bin file.
Exit jkeys, run jkeys again. The model should show 2700 and your
other info should be correct. Program the eeprom with the 2700
virgin you made. Test the receiver to make sure it is working good
as a bev 2700c.
Pin 9 of the tsop goes to the right pad of R216 then on to a feedthru.
You have to cut the trace between the pad and feedthru, I do it about
1/8" to the right of the pad. Then solder a wire from the right pad of
R216 to the center pole of a dpst toggle switch. Solder a 1k resistor
the the bottom pole of the switch and run a wire from that to ground.
Solder a #30awg wire into the feedthru where that trace used to go.
That wire goes to the last pole on the switch. One position of the switch
should be the normal connection from pad to feedthru, the other position
should ground pin 9 thru the 1k resistor.Grounded, the receiver uses the
1st 1/2 of the tsop, the other position uses the last 1/2 of the tsop.
If you added 2 dish bins then 2 bev bins, grounding pin9 will give
you a dish 2700,ungrounded will be a bev 2700c.
Pull the ac before you flick the switch.
When you switch back and forth between providers, you have to redo the
checkswitch test. If done correctly, the receiver will update in the
stream for both dish and bev.
Have fun.
Lutz Diagram