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Hi Roger
I’ approximately 300 miles away from my printer :- (( cannot check the wiring again for a while. I won’t be able to hack again my Lexmark before 2 or 3 weeks (well… If my boss lets me go :- / )
Did you also check the different “software switches” when burning your firmware in your Attiny ? I think mine was faulty.
Without a correct timing, would the laser be running ? I really don’t know. Only Mark could answer these questions.
73’
Marc
De : Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
Envoyé : samedi 4 avril 2015 06:01
À : Homebrew_PCBs@yahoogroups.com
Objet : Re: [Homebrew_PCBs] Re: DLP MCU version troubleshooting, help needed
Hi Marc & Mark,
I saw Marc's question marks on the same couple of wires I need some clarification on. I haven't seen any resolution yet, and wonder if these wires should be cut back to the connectors, left floating, or something else I am missing?
Below is my hookup chart. Is there anything that is incorrect, or needs adding?
MCU Board Hookup | ||||||
Device | Function | Conn | Color | ATtiny13 MCU | Function | |
Operator Panel | 3.3V | J5-5 | BL | 2 | Pad no.’s = Pin no.’s | PB3 |
Cover Open Switch Wires | 5V | J7-1 | YE | 8 | VCC | |
5V | J7-2 | RD | ||||
GND | J7-3 | BK | 4 | GND | ||
New Paper In Sensor (was narrow sensor) | 0-5V | J14-1 | RD | (Splice Sensor wire to J14 wire) |
| |
5V | J14-2 | BL | 5 | 4.99k to PAD 8 VCC | MOSI | |
GND | J14-3 | BK | 4 |
| GND | |
Manual Feed Paper Sensor | 5V (1.1V) | J23-1 | BL | N/C |
| |
5V | J23-2 | WT | 6 | MISO | ||
GND | J23-3 | BK | 4 | GND | ||
Exit Sensor | 5V (>0V) | J27-4 | BL | N/C |
| |
5V | J27-5 | WT | 3 | PB4 | ||
GND | J27-6 | BK | 4 | GND |
Thanks for any assistance,
Roger
On 2/6/2015 5:46 AM, Marc.olanie@... [Homebrew_PCBs] wrote:
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 ?
------------
Wiring after mod : check list of connectors
J4 : intact/untouched
J5 : intact/untouched (“X” button routed directly 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
----------------
J9 : intact/untouched
J10 empty
J11 empty
J14 : black =>gnd MCU, white=>pin 7 MCU, red =>NPIS Vcc
J12 : shunt with resistor
---------------
J502 : intact/untouched
J17 : intact/untouched
J501 : intact/untouched
---------------
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 ????
---------------
check list of NPIS :
NPIS=> MCU Pin5
NPIS =>Vcc J14
NPIS => MCU gnd
---------------
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 connectors are empty or not even soldered.
Marc
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