Fairlightiii

Thank you Thorsten for your answer. Regards.

Hello the midibox community. I plan to make a midi controller for a Cheetah MS6 synth. I'll use 48 encoders and 32 buttons as inputs (+2 rotary switches) and 41 LEDrings (10 LEDs bargraph) and 46 LEDs as output. I joint the PDF file: big rectangle=bargraph, little rectangle=button, little circle=LED, big circle=encoder (except the 2 top/left for DCO shapes=rotary switch). I have 3 questions: Does the core can handle the 41 LEDrings (I remember a thread speaking of that but I haven't found it again)? Is-it possible to mix ledrings and leds into the same DOUTX4 (I think yes but I must be sure)? Is there any possibility to have 9 extra outputs for LEDs than the standard 128 (it is the reason why I use rotary switch: I've replaced button/LED by rotary switch because no more DOUT pin to indicate the state of the parameter)? Thank you for your answers. Best regards, Jérôme. MS6 controller.pdf

Hi steveeeee. Sorry for the late answer but in fact it's not me who try to repair the MS6 but a friend of me because I fell (more exactly I felt at the beginning) myself to newbie in electricity/electronic to touch 230V and I didn't want to break the MS6 more than it was. He has few spares times but he should try new transformers before the end of the week. As you could see, the transformers I bought are too high so we plan to put them outside the case of the MS6. I've also bought another faulty MS6 on ebay which seems to be in best condition than the first one (if we can bring to life the 2 synths…). I'll comme back as soon as I have news. Jérôme.

Ironically, I bought the crimp tool on ebay yesterday even if I had ordered something else on Reichelt two days ago and wasn't sure whether it was worth buying it on Reichelt as well. It's a shame I didn't know before...

Hello. For those who are looking for crimp tool, I found this one that seems to be like the one SmashTV sells. AUS $9.99 EUR €7,63 US $10.24 UK £6.54 Shipping included. Regards. Jérôme.

Thank you phunk. I've finaly made an order on Reichelt even if I don't speak German (with Google help!). I hope my MS6 will be rescued after that. Best regards. Jérôme.

Thank you Phunk for your answer and your (excelent) explanations. It is not so easy to find center tapper transformers but I've finaly found this products (signaltransformer.com): 14A-20-20: Dual Primaries 115-230V / 20VA / Series: 20.0 VCT @ 1.0A / Parallel: 10V @ 2.0A 14A-20-36: Dual Primaries 115-230V / 20VA / Series: 36.0VCT @ 0.56A / Parallel: 18V @ 1.12A Is-it possible to confirm this references and the fact I have to connect together Pin 9 and 10 (center tap). Best regards, Jérôme.

I assume you must know but... Regards.

Hello. First I'm electronic newbie. Second I'm French (poor English). I've bought a Cheetah MS6 on Ebay. Unfortunately, the 2 PSU transformers are broken. I need to replace them but I don't know which ones I have to buy. I join the schematic of the PSU. Perhaps someone have an idea what "707v" and "909v" mean. References are welcome. I've just built my smashTV's modules and now I need my little Cheetah work (I plan to use Maad's firmware). Thank you. Best regards. Jérôme.

Hi Tim. Thank you for your help. The multimeter came with only the chinese owner's manual and the video I see to know how plugging the leads doesn't show the right way. Best regards. Jérôme.

Thank you for your answers. JRock: I tested with inverted PSU leads and the problem is still there. Also I've read that PSU polarity doesn't matter... I checked the polarity of the leads of the multimeter and it seems OK (com="+" and v_ohm="GND"). Flemming: I checked the voltage but always -5V, assuming the pin 1 of the IC1 (PIC) is the one at the bottom-left and the pin 1 of the IC2 (6N138) is the one at the top-left when you can read "IC1" and "IC2" in the "right way" (= not upside down) - see the picture – I can't read the first pin of the ICs on SmashTV Core (perhaps under the sockets). If you have another idea, let me know...

Hello everyone. Sorry for my bad English (I'm french). I've assembled a SmashTV Core R4d kit. I've used the tutorial "Assembling_a_MIDIbox_Core.pdf" by Jim Henry. In this tutorial before inserting PIC and opto-isolator he advices to measure the voltage between four pairs of pins. He says it should be very close to 5 volts but when I do it I measure -5V instead +5V. I'm sure some of you have an idea what is the problem. Thank you for your help. Jérôme.