- Joined
- May 10, 2019
- Messages
- 23
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- 15
Hello everyone! I asked about the ntsc to pal m conversion around here before, and still on that board, I finally received a great many deal of things to try out and start building my own portable.
To the point, when I connect power I get the correct voltage on every pin and chip I could check, the rts cpu and ram heat up but i get no video.
For the 3.3 voltage regulator I'm using a DNS mini 360 which is rated to output 1.7A, I thought it could be the problem, but 1.7A should be ok, I guess.
The battery is working, and I rechecked every soldering and voltage on the board (hundreds times lol), but I cant see where I might have gone wrong, or what else to check. Maybe it's the conversion? I desoldered it from the board and yet didn't solder a new oscillator, even though I think the one on the board is it's original one. Also checked the cartridge connections for anything soldered wrong, it's a lot of solder points, but they are all correct.
Also checked not only on my portable screen but on a TV, soldering a cable to the board. What I didn't check out yet is continuity from the composite chip pin to the pin that goes out of the board, but apart from this, any more suggestion I could check?
Attached are some images, of how I soldered the power pins, the on and off switch and reset, maybe I got those wrong? Who knows, but the chips get warm so I assumed not. The reset connection I got from an old bacman file, what happened to him btw?
Let me know if I missed any information to be helpful here. Cheers!
EDIT: Today when I went to test it again, now the screen is flashing. Yesterday I also forgot to mention I checked the ram expansion aswell as using a jumper pak. Same results.
(Had to upload to imgur because the file uploaded here is not working for this.)
The same happens when I hook the cable to the composite on the enc chip directly.
To the point, when I connect power I get the correct voltage on every pin and chip I could check, the rts cpu and ram heat up but i get no video.
For the 3.3 voltage regulator I'm using a DNS mini 360 which is rated to output 1.7A, I thought it could be the problem, but 1.7A should be ok, I guess.
The battery is working, and I rechecked every soldering and voltage on the board (hundreds times lol), but I cant see where I might have gone wrong, or what else to check. Maybe it's the conversion? I desoldered it from the board and yet didn't solder a new oscillator, even though I think the one on the board is it's original one. Also checked the cartridge connections for anything soldered wrong, it's a lot of solder points, but they are all correct.
Also checked not only on my portable screen but on a TV, soldering a cable to the board. What I didn't check out yet is continuity from the composite chip pin to the pin that goes out of the board, but apart from this, any more suggestion I could check?
Attached are some images, of how I soldered the power pins, the on and off switch and reset, maybe I got those wrong? Who knows, but the chips get warm so I assumed not. The reset connection I got from an old bacman file, what happened to him btw?
Let me know if I missed any information to be helpful here. Cheers!
EDIT: Today when I went to test it again, now the screen is flashing. Yesterday I also forgot to mention I checked the ram expansion aswell as using a jumper pak. Same results.
(Had to upload to imgur because the file uploaded here is not working for this.)
The same happens when I hook the cable to the composite on the enc chip directly.
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