Messages

[Console Repair/Mod Center / Re: Replacing the Card Slot]

You can replace the slot or just the pin from a tg16
Insert pin with card inserted so it sets properly

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[Console Repair/Mod Center / Re: Turbo Duo-R with Graphic Glitches]

I have a Turbo Duo-R that has graphic glitches once you start playing a game.  The loading screen is fine, you can load a game no problem and even the title screen of the games seem to be fine, but once you try to start playing, the graphics are all messed up.  Should I start with swapping out the ram chips?  does this sound like a ram issue?

It depends actually
Likely a ram issue, but in most cases it's the traces not the chip
Which chip can often be determined by the specific image that's corrupted on certain games

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[Console Repair/Mod Center / Re: PCE DUO cd spindle not spinning but laser is tracking and seeking.]

Could be a bad sled motor

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[Console Repair/Mod Center / Re: ADPCM]

i use steam hearts
the intro movia is ADPCM

[Console Repair/Mod Center / Re: Switchless Mod: Why not for PCE/TG16]

the issue is there is no reset button, and without a system boot the controller isnt paged

[Console Repair/Mod Center / Re: Garbled graphics on HuCard]

my pc genjin2 is also bad in the same way

[Console Repair/Mod Center / Re: PCE DUO cd spindle not spinning but laser is tracking and seeking.]

gts it sounds like yours is getting stuck
clean rails, clean gears, wires not getting cought

[Console Repair/Mod Center / Re: duo rx hucard works but with no huecard cd system no 3.0 cd system post]

IC520 failures are somewhat common on all duo version and NEC LA pac
it is the only chip that switches between card and internal bus
on most it wont load card either as it shorts the data bus

[Console Repair/Mod Center / Re: Game-Tech region modded TG16 can't use everdrive]

i second this
the issue with TED and region mods was with the ED V1 and the PCE/CG units
using either the ED V2 or any other version of the system solved the issue
i have not seen the 383 based region mods have any issues with the ED V2.X on any system
also note that the 2 chip region mods had issues with all ED versions

[Console Repair/Mod Center / Re: PAL turbografx NTSC mod]

it works quite well
the pal unit is less noisy then the ntsc one

[Console Repair/Mod Center / Re: TG16 White Screen bone stock]

the chips shouldnt get hot on these

[Console Repair/Mod Center / Re: PC Engine Duo White Screen problem :(]

it doesnt have a power light
it does have power chokes, that could be damaged by a short

[Console Repair/Mod Center / Re: PC Engine GT Cap 504 and 103 function.]

the backlight isnt adjustable on these, so not an issue

[Console Repair/Mod Center / Re: PC Engine GT - no video or sound before and after cap replacement]

light on, contrast working T900 and L900 are good
the system didnt boot
it could have a bad chip or damaged trace/bent pin
in most cases it would fail white/colored screen
chips are replaceable, some have to be harvested

[Console Repair/Mod Center / Re: PC Engine GT - no video or sound before and after cap replacement]

if the contrast knob works, it could be a chip issue, if not it could be a bad screen/T500 or related circuit
the chip issue would explain the no sound as well
black screen has been mostly work ram failures, but could be circuit related as well

[Console Repair/Mod Center / Re: SuperGrafx with broken board]

you just need to flatten the board, then start jumpering traces
you want the trace jumpers as small as possible so they dont obstruct the work

[Console Repair/Mod Center / Re: PC Engine GT Cap 504 and 103 function.]

dont know the spec on L900 (or location for that matter)
T900 is the backlight transformer for the fluorescent lamp in the display

[Console Repair/Mod Center / Re: PC Duo no video, multicolored screen, several problems?]

multi color like that is almost always a missing connection to the card or a short between pins

[Console Repair/Mod Center / Re: PC Engine GT - no video or sound before and after cap replacement]

no sound or pic.........is it on?
screen white/black/other?

[Console Repair/Mod Center / Re: PC Engine GT Cap 504 and 103 function.]

103 + goes to a via by the headphones jack and 504 is across the 5V bus
jumper it in or use radial is fine

[Console Repair/Mod Center / Re: SuperGrafx with broken board]

under the slot is the common crack on those

[Console Repair/Mod Center / Re: Duo RGB to Component v2.0 Chip Help]

just reread the post
the component side of the mod is output, as it takes RGB input
if connected right the duo will have about 4.8V on the RGB pins
that board is fairly self stable, so any input should give you an output

[Buy/Sell/Trade / Re: Turbografx-16 & PC-Engine Reproduction Hucards & Cases Now for Sale!!!!]

So, what kinds of limits are you guys self-imposing? Are there certain titles you aren't going to reproduce? I'm already glad you're asking our home-brew folks before trying to do their titles. What are the determining factors of which titles you select and which you'll avoid?

well as for title limits, we didnt put a mapper in the card, so only direct addressed games
the intent was to try to undercut the super rare price gouging titles, so cheaply available cards will be ignored for the most part
as for the homebrew games, they are currently produced titles, and as such it wouldnt be right to undercut it (however we would love to supply the blanks, or produce the cards for the homebrew scene)

[Console Repair/Mod Center / Re: Duo RGB to Component v2.0 Chip Help]

I also use that pinout, but remember Y is green Jack, Pr/Cr red and Pb/Cb/ blue
You should have direct continuity from Jack to mod

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[Console Repair/Mod Center / Re: Duo RGB to Component v2.0 Chip Help]

Check the cable continuity for ground and each Jack to the board

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[Console Repair/Mod Center / Re: Duo RGB to Component v2.0 Chip Help]

OK start checking voltages on the component board
Check the 4 inputs and 3 outputs as well as power and ground

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[Buy/Sell/Trade / Re: Turbografx-16 & PC-Engine Reproduction Hucards & Cases Now for Sale!!!!]

they wouldnt even need to release the rom, as these are programmable using a chip burner wired to a card slot

[Console Repair/Mod Center / Re: HELP!! Turbo Express video looks upside down?]

looks like you have an open trace 6260 or 6270
likely scratched one during recap

[Console Repair/Mod Center / Re: PC Engine duo RGB audio hum/buzz]

just a note, reducing the current in the RGB lines will reduce it notably
it will also make you pic less vivid

[Console Repair/Mod Center / Re: PC Engine duo RGB audio hum/buzz]

i havent messed with it in awhile
the reason the cap works, is it makes the 5V wire another signal ground
the issue is the wire gauge used being too small in the cable allowing for voltage drop
another way to mask it would be to add an amp to the audio and drop resistors in the cable (same concept as the cables with the 75ohm resistors on video)

[Console Repair/Mod Center / Re: PC Engine GT - Video Out Mod - How to get the Video signal out of the housing]

actually the issue has been in finding composite screens that sync properly to the sync signal
it hasnt been a price thing either, as we have had good screens as low as $15 and $35 ones that didnt work

[Console Repair/Mod Center / Re: PC Engine White Reads Some Hu Cards, Not All]

you could have an open trace on IRQ1 or an upper address pin (uncommon, but ive seen it a few times)

[Console Repair/Mod Center / Re: Just bought a pc engine duo r from Japan]

on the DUO-R the sega geni2 plug works, the geni1 plug wont fit in the hole
the polarity and voltage is close enough to work fine
if its blowing fuses, you have a short
it could be a bad regulator, shorted chip, or solder bridge
whatever it is, odds are you can find it with an ohm meter across the duo power  traces (with unit unplugged)

[Console Repair/Mod Center / Re: Duo System with Faulty Hu Card (Bad Trace)]

if all cd games work, i would be looking at the card detect pin, and the bus control circuit (IC520)
generally if IC520 is bad it wont load anything, but on open trace on its control pins could likely cause this
use the TG16 schematic, as that covers the hu card circuit, just not the CD side (note cards will run with IC520 removed, allowing you to test the basic system without the CD hardware in play

[Console Repair/Mod Center / Re: Duo-R Audio error [Solved!]]

well that is about what i have in them
so make me an offer (im assuming you want a white 5player)

[Console Repair/Mod Center / Re: PC Engine GT - Video Out Mod - How to get the Video signal out of the housing]

actually i always add a contact to the headphone jack, so it can use a 3 or 4 pin jack

I <3 this!

What do you do, you buy a new headphone jack for 4 pins?

I remove an inductor from the board, hook video to the existing ground pin and add a contact to the existing Jack for ground

[Console Repair/Mod Center / Re: Duo-r Reading only music discs, not game discs.]

ok a few things
if you cant select track 2 it wont work
other option is the cd buffer ram failed
seen both faults, fix the track selection first

[Console Repair/Mod Center / Re: PC Engine GT - Video Out Mod]

actually i always add a contact to the headphone jack, so it can use a 3 or 4 pin jack

[Console Repair/Mod Center / Re: Duo-R Audio error [Solved!]]

i have taps
whats fair?

[Console Repair/Mod Center / Re: Duo-R Audio error]

good chance of that being the issue

[Console Repair/Mod Center / Re: Duo-R Audio error]

Depending on which chip, I have the ram

[Console Repair/Mod Center / Re: Duo-R Audio error]

Could be a bad ram chip, bad D91317GD or open Trace
In most cases it's the trace

[Console Repair/Mod Center / Re: Duo-R Audio error]

Bad address on pcm ram is possible, and has been seen a few times
Test with YS3
just let it loop and watch for scrambled frames
That game has no pcm, but uses the pcm ram as a buffer for some images

[Console Repair/Mod Center / Re: Another white screen Duo issue.]

Both sides of the switch go to the NEC chip between the two Sony ones

[Console Repair/Mod Center / Re: Duo CD Won't Spin]

the place to start is the data bus (system side) on the D91317GD
you will need a scope or logic probe to check it, as your looking for missing or stuck signals

[Console Repair/Mod Center / Re: REPAIR GUIDE - TurboDuo/PC Engine Duo/R/RX: Laser Swap & Adjustment Guide]

.25V is too low
adjusting the focus and tracking pots will change the Vpp, so try that first (target is between .7Vpp and 1Vpp)
the pot on the laser will directly effect it, but too high and the laser fails (shouldnt need to touch it)

[Console Repair/Mod Center / Re: Pc engine duo problems]

wow hard to follow
so does it work now, less ADPCM or is it whitescreen without card?

[Console Repair/Mod Center / Re: PCE Duo disc keeps spinning]

nick is right as to 1 issue you are having
you are losing power to the CXA1082
the CXD1167 should not be getting hot, so it may be bad as well

[Console Repair/Mod Center / Re: Another nother Duo white screen. Please?]

ok so the 6270 was dead (replacement revived system)
odds are you have an open address between the 6270 and its ram (touching the ram will cause the display to change)

[Console Repair/Mod Center / Re: Can a region mod keep an Arcade Card Pro from working?]

ah, the 2 chip mod did have a voltage issue