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Summary of change:
V3.3 was populated with D100, a protecting 18V zener (between injector flyback rail and GND5) that provides some protection (for the 8 injector-FETs) if the user forgets flyback connection (but doesn't use injector PWMing). '''However, when PWM-ing is applied (non 100% duty) and powerflyback is used, if injector-common+ is above appr 13.3V''' * the 18V zener (with very low Ampere rating) will clamp to GND5 * not towards injector-common+ through the 5*diode drop powerflyback (which is desired, since the powerflyback has high, >20A peak current rating). Unfortunately the powerflyback was tested with 12V supply and D100 sneaked attention. Note: assembled controllers sent out after 2006-jan-11 have these removed. '''D100 diode to remove marked with yellow''' D100 is also different from the rest, different shade and text is PJ52LM (not ES2J). http://www.vems.hu/files/Wiring/DiodeBoard_0003r_removeD100.jpg Customers who ordered assembled controller with powerflyback option and don't want to remove D100 themselves should ask in webshop and we provide address a shop on their continent to do so. ---- See GenBoard/Manual/PowerFlyback
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