Homebrew_PCBs

Roger,

Sorry about the resistor. The 30K was used in a previous version that used a reflective sensor - It should be about 5K. The higher resistor should work (I think), but it will be more susceptible to noise. If you send it back I will be happy to replace the resistor. If you prefer I can just send you a new resistor and you can replace it yourself.

To see if it is the resistor, turn the machine on and put a voltmeter from ground to the sensor's collector (the end of the resistor NOT connected to the 5 volt supply). With the carrier blocking the sensor, it should read 5 volts. When the hole reaches the sensor it should drop to near 0 volts, then go back up after the hole passes through. Do this by manually moving the carrier because it might be hard to see without a scope in real time.

Mark

At 12:07 AM 4/6/2015, you wrote:

Mark,
I have resolved one issue... Cleaning with Acetone didn't do good enough of a job. After re-cleaning the carrier with mild detergent and scotchbrite, Drying with fresh clean cotton dish towel, I am not getting the paper jam indication upon the first pull, and am not getting residual toner on the sheet. Poor conductivity at first, I think. However now, when I print from the PC, the carrier pulls in to about.75 past the trigger hole, and stops with a jam. Is this likely due to the high resistance of the pullup resistor (30.1k) preventing the trigger from working?
Thanks,
Roger


On 4/5/2015 5:31 PM, Mark mlerman@... [Homebrew_PCBs] wrote:

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Roger,

This usually happens if the NPIS doesn't see the hole in the carrier. Did you remember to drill one?

Mark

-----Original Message-----
From: "Roger Blair Roger.Blair@... [Homebrew_PCBs]"
Sent: Apr 5, 2015 10:33 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Re: DLP MCU version troubleshooting, help needed



Hi Mark (& Marc), again...
I found a few overlooked corresponding emails from earlier in time, and with a little more information... I have just completed wiring the printer as follows, and have a fault:

E260dn DLP 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

Thermistor Substitute

5V

J12-1

BK

(J12-1>2.7k>J12-2)

(RD-VI-RD)

Fuser Temp

GND

J12-2

BK

New Paper In Sensor

(was narrow sensor)

0-5V

J14-1

RD

(Splice J14-1 wire to Sensor)

Â

5V

J14-2

WT

7

Pad no.’s = Pin no.’s

SCK

GND

J14-3

BK

4

GND

Â

Sensor

RD

(Splice Sensor wire to J14-1)

Â

Â

Sensor

BL

5

(4.99k to PAD 8 VCC)

MOSI

GND

Sensor

BK

4

Pad no.’s = Pin no.’s

GND

Manual Feed

Paper Sensor

5V (1.1V)

J23-1

BL

Open

Â

5V

J23-2

WT

6

MISO

GND

J23-3

BK

4

GND

Duplex Sensor

5V (1.1V)

J27-1

RD

Cut

Â

5V

J27-2

WT

Cut

Â

GND

J27-3

BK

Cut

Â

Exit Sensor

5V (>0V)

J27-4

BL

Open

Â

5V

J27-5

WT

3

PB4

GND

J27-6

BK

4

GND

On power up with cartridge in place, the printer initializes OK. When I insert a carrier and press X, the carried is pulled in about half an inch or more (variable), stopping with a paper jamb indicated. Pressing continue a number of times eventually pulls the carrier clear of the drum, while still indicating a jamb. If I cycle the power switch with the carrier in position, upon initialization the carrier is automatically pulled through completely. There is a light dusting of toner on both sides of the carrier whenever it goes through the machine.. It appears that I have something amiss...
Being near the bottom of the electronics food chain, I could use some guidance.
Thanks,
Roger