Recent content by dewmansnk

https://i.imgur.com/L6A4z6m.jpeg Did you replace the purple cap in the top-right of the photo? (The one with the orange OK label) That is a bipolar cap used in the horizontal deflection circuit and has a really high ripple current rating (probably > 5.0 Amps)...

Bought a PCB from @plasticfactory. Item packed very well to ensure safe delivery. Item arrived safe and sound and just as descrived. Fast shipping and great communication. Excellent member

Thank you so much!!! I have been trying to figure out a way to soft-reboot back to the games menu. Zardam has a patch for the unibios that does exatly what I was looking for. Christmas came early.

3346AD Ref Des - L808 Ls - 3.906mH @ 1Khz Cs = 6.487 uF Rs = 2.11 Ohm Tested with DE-5000 LCR Meter I had one of those pop off and rewound it, I ended up with somewhere around ~3.7mH which seemed close enough for it to work.

Try squeezing the handles really hard. When I fist got my JST crimps I could not get the jaws open either. Turns out they just take alot of pressure to get to the last ratchet position to click, then they popped right open.

The Toshiba MCU seems to have a bug where it corrupts the I2C EPROM, and when this happens it corrupts the contrast value so you cannot change it. See this thread for the fix: https://www.arcade-projects.com/threads/toshiba-pd1843-15khz-dim-image-low-brightness.26132/ You basically take the I2C...

PM sent for 3x sets. Really appreciate you making this happen!

I'd like to increase my order: F0095H0 chips: 6 total Thanks

F0095H0 chips: 3 V3 boards: 3 Thanks!

I'll take a 20 pack please.

Glad that fixed the issue. Looks like you ran into a different failure mode the first time around. The contrast being locked at 100 is the one I am used to seeing. I had been meaning to update my Tosh PF thread with this EEPROM fix, guess I need to get around to doing that.

It seemed like the EEPROM was fine in the instances I ran into, just the MCU writes out garbage data for some reason and corrupts the EEPROM. If you can adjust the contrast/brightness with the remote board, then I don't think you are running into the EEPROM corruption. In the cases I had seen...

The MCU on the Toshiba PF is responsible for controlling the I2C bus and changing the settings in the Video Amp-LM1269NA Deflection IC - NEC C1888FCT (NEC uPC 1888 ) All the settings in the OSD are just the MCU configuring either the video amp IC or the Deflection IC via I2C. The MCU saves...

This interface PCB is derived from my other Meanwell interface PCB - https://www.arcade-projects.com/threads/awsd-power-supply-interface-pcb.12091/ It takes the Meanwell QP-150-3A and adapts the screw terminals to be compatible with a Sanwa SWN-JVS power supply. While similar in appearance to...

Welcome new old timer, nice cabs!