If you're also selling the motherboard, @8bitforlife has been looking pretty feverishly for one.
Brezzasoft Crystal System conversions
- Thread starter rewrite
- Start date
geosnow
Enthusiast
I keep the mobo with my King of Crystal. Thank you 
XtraSmiley
Legendary
Wise man! @Apocalypse might be interested, but he probably won't commit for a month or so.I keep the mobo with my King of Crystal. Thank you
This multi is a tough one to sell. It's probably best for people with a motherboard, but no King of Crystal game!
GLWTS!
A
Apocalypse
Ok so trying to fix a BCS motherboard I got from the guy who posted just above 
I cleaned all the rust from the battery leakage, patched some traces and now it boots to the test screen BUT:
- sound is at maximum volume
- red and green are completely missing
Regarding sound I think it could be linked to the fact two caps are missing in the audio section : C61 and C64, if anyone has the value of those… (I'm also wondering if there's supposed to be something populated @ C75).
For the colours I'm a bit worried since they're coming straight from the VRender chip...
Board is also missing Q2 & Q3 but I believe they are battery related.
I cleaned all the rust from the battery leakage, patched some traces and now it boots to the test screen BUT:
- sound is at maximum volume
- red and green are completely missing
Regarding sound I think it could be linked to the fact two caps are missing in the audio section : C61 and C64, if anyone has the value of those… (I'm also wondering if there's supposed to be something populated @ C75).
For the colours I'm a bit worried since they're coming straight from the VRender chip...
Board is also missing Q2 & Q3 but I believe they are battery related.
Good pics of the two different motherboards here: https://www.mvs-scans.com/index.php/Main_Page#BrezzaSoft_Crystal_System
I have one or each that work fine if you need me to check anything @Apocalypse. Will post the values of those components for you in a bit. What revision motherboard is it?
I have one or each that work fine if you need me to check anything @Apocalypse. Will post the values of those components for you in a bit. What revision motherboard is it?
Last edited:
A
Apocalypse
Hope this helps, values taken from the Crystal of Kings motherboard (AMG0110B)
C64: unpopulated
C75: unpopulated
Q2: A1266Y Transitor
Q3: C3198Y Transistor
I need to take a measurement of C61, is this doable using my multimeter?
C64: unpopulated
C75: unpopulated
Q2: A1266Y Transitor
Q3: C3198Y Transistor
I need to take a measurement of C61, is this doable using my multimeter?
I made a cap map list, confirmed to be the same values on AMG110B by @ekorz hope it helps.AMG0110B
Attachments
@Derick2k sadly I think @Apocalypse needs the value on an smd cap. It needs to be taken off a board before it’s measured
Yup, just in case you were missing any of those.
Also, if you have time list values of those parts you are replacing around the battery section, Im sure others need to do similar repairs.
A
Apocalypse
Legend!
I hope you get it fixed! There are too few of these around as it is!Legend!
And nice find @Derick2k, if anyone has that manual, please upload it so I don’t have to remove any more components from my pcb
A
Apocalypse
We're (almost) in business! Found an other rotten trace and now red and green are back:
But that didn't change anything regarding the maxed out sound. Whatever its position I don't see any change in the measured resistance between pins of VR2. Maybe it's cooked. @ekorz
?
So far I only replaced C61.
But that didn't change anything regarding the maxed out sound. Whatever its position I don't see any change in the measured resistance between pins of VR2. Maybe it's cooked. @ekorz
?
@Apocalypse
It is a stereo b103 pot and thankfully matches the footprint of a Gameboy Advance volume pot perfectly, you just have to bend the pins to fit through-hole instead of surface mount. New pot on the right, above, works great.
A
Apocalypse
If that gives you hope, mine had 6 pads completely eaten by the battery leak. Since traces all went under the chip I decided to solder wires directly on the VRenderZero legs. So far so good, it's alive.
It doesn't XD
The "good" board (HA..good), had perfect condition, no rust or leak, new rams from serious supplier like Digikey (so no fake chinese shit at least), new caps, new reset ic, and guess what? the same. It doesn't work.