Turbo Everdrive V2 does not work in my US Turbo

[Lost Monkey]

1. Serial #9841711HB

Mods:
-A/V out (composite)
-LEDs under grille

Connected via:  TGCD  Result: TED V2 no start...
Connected via:  TurboBooster+  Result: TED V2 no start
Connected via:  RF Result: TED V2 appears to work fine - ran it for half an hour with Air Zonk
Connected via:  A/V mod  Result: TED V2 starts, but is glitchy/freezing after a short while...

Strange how using the composite could affect things...  Is it a A/V mod box that attaches to the ext port?

No box - just a direct wiring of the A/V outs from the bus to RCA jacks on the side of the TG16...

[Lost Monkey]

Here's another thought.  What power supply is everyone using?  I'm using a Genesis model 1.

I forgot to mention this before, but I tried with both an original power supply and a Genesis supply... same results.

[elmer]

Summary - I have two units that work via RF and that is it...

With unit #1, I ran it for half an hour with Air Zonk and then switched to the A/V output by plugging in cables - the picture went back and the music kept playing.  I switched back to the RF signal and the screen had indeed turned black.  "run+select" reset just made everything black and the music stopped too...

There are also 2 guys reporting failures on Core II systems (but only when they attach their Tennokoe2).

We need someone that actually does electronic design work to comment on this ... but from my very limited rememberence of university, this sounds like CPU bus-loading issues.

Everything is OK on your 2 unmodified base systems ... but once you add the extra circuitry or trace-length on to the CPU bus with either the TGCD, the TurboBooster+ (the memory backup), or the region-mod ... then that's when it all falls apart.

It's entirely possible that the TED2's two ALVC16424S 3.3V-5V transceivers just don't have the strength to drive good signals against that load.

It could still be power issues, though.

It really needs someone with the right skills/equipment to look at it.

Strange how using the composite could affect things...  Is it a A/V mod box that attaches to the ext port?

No box - just a direct wiring of the A/V outs from the bus to RCA jacks on the side of the TG16...

This is the result that confuses me.

[NightWolve]

(the original 5v regulator is a traisnstor and zener diode in emitter-follower design with no protection if one of that fails, the whole system gets 9v and gets cooked)

I wish I understood that way back... My SNES kept popping fuses and I ran out of 1 Amp rated, so I went higher cause I thought I solved it, but same thing. Steve told me the regulator burned out so I did a 5 Volt mod to the system, took out the regulator and heat sink, used a new regulated power supply that outputs 5.3 VDC exact and got the system running again. But, I fried one of the SRAM chips with the fuse burnouts and the 12 Volt original power supply, the cheap unregulated style that it was (says 10, goes 12 with my home's 126 VAC supply).

So as wilykat describes, the broken-down regulator in my case, having gotten at the end of its lifespan, sent the full input 12 Volts to the motherboard from its output leg and caused damage!! Only for a second as the new fuse popped again! So yeah, until I swap that SRAM chip out, I have graphical glitches on bitmaps with certain games... :/

Anyway, it would be interesting if this can be solved with a better 5 Volt regulator for the US TG-16!

[Desh]

I finally have news to report.  My untouched (other than cleaning the card slot) Turbografx will sort of run TED V2.  I am running it with the original power supply and original RF box.  Serial number 9Y88229HB. 

I am pretty sure my rom files are good (same ones I ran on my old TED that worked just fine).  Many games will load but crash during a boss fight or other random times during the game.  Other games just won't load at all.  These same games do load fine while running in my Turbo Duo.  Perhaps I will contact Bernie and download his rom file and try some of the same games that won't load. 

Very interesting indeed.

[MotherGunner]

This sucks.  Hopefully Krikzz will address this once he's back from vacation.

Yea, when his happy ass is done spending all yall's money!

[SephirothTNH]

^ this.  He never worried about fixing the v1 with region modded systems so I wouldn't hold my breath.  It's going to be up to the community to try and find a fix. 

The only thing krikzz could probably do is fix it in later revisions. 

[Keith Courage]

Quick fix. Sell off or return your versions 2 everdrives and get version 1 everdrives instead.

[NightWolve]

Heh.

[SephirothTNH]

Quick fix. Sell off or return your versions 2 everdrives and get version 1 everdrives instead.

No need.  It works great on my duo which once I recap it will become my primary system to OBEY.

[Desh]

Quick fix. Sell off or return your versions 2 everdrives and get version 1 everdrives instead.

This.  I already regret "upgrading" to V2.

[cjameslv]

Well so far no issues, tested it on my modded tg-16, us duo & pc duo. Same rom set i had for v1.1 besides adding the new folder to core, rest is the same and everything is working properly.

[NightWolve]

Aaaah, so that's the trick to it! Should've known...

[jtucci31]

Well so far no issues, tested it on my modded tg-16, us duo & pc duo. Same rom set i had for v1.1 besides adding the new folder to core, rest is the same and everything is working properly.

Resolution:  Proper operation of TED v2 requires a fully charged crystal.

Do I hear a need for a JO Crystal Group Buy?

[esteban]

Anyone who charges with me at the local Howard Johnson's gets a free crystal*.



*while supplies last