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Hi Mark
I triple checked all the wiring (see below)
Next step : I'll try to change the processor board
Do you have an idea on how to check the laser beam ?
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Wiring aftermod : check list of connectors
J4 : intact/untouched
J5 : intact/untouched (“X” button routeddirectly with a wire going from front panel to =>pin 2 MCU)
J100 : intact/untouched
J7 : To MCU (black => gnd MCU, red =>pin8 MCU(Vcc), yellow => Vcc, shorted to red)
J8 : intact/untouched
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J9 : intact/untouched
J10 empty
J11 empty
J14 : black=>gnd MCU, white=>pin 7 MCU, red =>NPIS Vcc
J12 : shunt with resistor
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J502 : intact/untouched
J17 : intact/untouched
J501 : intact/untouched
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J28 : empty(unused tray selector)
J27 : black=>gnd MCU white=>pin 3 MCU, Red-white-black: cut, blue=NC ????
J26 : empty
J25 : intact/untouched
J23 : black=> white=> pin 6 MCU, blue=NC????
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check list of NPIS :
NPIS=> MCU Pin5
NPIS =>Vcc J14
NPIS =>MCU gnd
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check list of connectors MCU :
Pin 1=>ISP reset
Pin 2=>X button
Pin3 =>J27-5
Pin4 =>GND
Pin5 =>NPIS collector
Pin6 =>J23- white
Pin7 =>J14-white (middle)
Pin8 =>Vcc
Other connectorsare empty or not even soldered.
Marc