hyuma

I have 5.4v on one side of R137... I never measured yet R160 Inviato dal mio CLT-L09 utilizzando Tapatalk

Voltage is about 5.45v. And no, I don't have nothing plugged on expansion module Inviato dal mio CLT-L09 utilizzando Tapatalk

Q20: Base: 11.17v Emitter: 11.93v Collector 11.90v Q23: Base: 4.24v Emitter: 3.50v Collector: 7.86v Inviato dal mio CLT-L09 utilizzando Tapatalk

I haven't nothing similar on that pins and also I replaced the oscillator with the same model and the situation didn't changed at all.. I tested 3 different new oscillator and still don't know why I haven't the 4.3mhz wave.. Inviato dal mio CLT-L09 utilizzando Tapatalk

After 2 days of tinkering I start pointing finger to the area of the board near the Lm1889n because now I replaced ram sockets and the image appears and disappear like a scrambled TV... And also image is black/white. I just noticed that oscillator Y3 doesn't show me any freq on any of his pin, and I'm not sure if Lm1889n could be ok... Inviato dal mio CLT-L09 utilizzando Tapatalk

TMS416415NL, but I'm 100% sure that ram are good because I have tested with arduino Inviato dal mio CLT-L09 utilizzando Tapatalk

Ok so, the 2s and 14s pin have all continuity with VDP with no problem, also VDP have good continuity with Z80 too and voltages on RAM +5v pin8 is present, pin 1 have 0v and pin9 around +5v too Inviato dal mio CLT-L09 utilizzando Tapatalk

Ohhhh ok, gotcha! Inviato dal mio CLT-L09 utilizzando Tapatalk

DRAM 2 14 U10 pin 7 vdp 29 U11 pin 3 vdp 25 U12 pin 8 vdp 30 U13 pin 4 vdp 26 U14 pin 9 vdp 31 U15 pin 5 vdp 27 U16 pin 10 vdp 32 U17 pin 6 vdp 28 Like this? Inviato dal mio CLT-L09 utilizzando Tapatalk

What's the scheme means? And yes z80, bios, Sram and vdp have good continuity between them, I checked all combinations possible Inviato dal mio CLT-L09 utilizzando Tapatalk

Continuity between z80, Sram and BIOS is perfect, then I checked the continuity between vdp and DRAM by following the scheme in picture is good too.. Inviato dal mio CLT-L09 utilizzando Tapatalk

When I was reading with logic analyzer I always put the probe on the data lines of Z80, I never used the data lines of BIOS.. Today i got new VDP but the old one is ok, there is the same issue with new one. The DRAM are 8 4164 but I tested with arduino code and they are good.. I have to check traces but they seems cleaned and ok.. Also this is where I get info for the mod https://gamesx.com/wiki/doku.php?id=av:cbs_coleco Inviato dal mio CLT-L09 utilizzando Tapatalk

HOUSTON, WE GOT SOMETHING!! http://imgur.com/a/ldTDWMd http://imgur.com/a/J2DzH3G I found a little broken trace between Sram and BIOS and this is the situation now! OMG THERE IS LIFE!! I tested all DRAM and they're ok, I'm using this composite mod I made...[mention=66741]ChildOfCv[/mention] Inviato dal mio CLT-L09 utilizzando Tapatalk

What I have to do? Sorry I didn't understood Inviato dal mio CLT-L09 utilizzando Tapatalk

Socket are clean, like I cleaned also pins of ICs with IPA and deoxit... This is sampling wihtout VDP, reset is channel 8: https://ufile.io/kbgmeph6