RS Wiki - User contributions [en]

HowTo fix page offset for Kyocera FS-1020

2017-02-12T15:56:58Z

Rac2:

=Summary=

==Problem==

Printing on my old Kyocera FS-1020 works without any issues but the page alignment is often wrong. Pages have a variable offset, there is no correlation from one page to another. Some pages start with a negative offset, some with positive offset, sometimes as big as centimeters.

I looked for sometime for a solution and found nothing that described the procedure completely. You have to clean up and replace damping elements on all 3 solenoids! and not only on the central one. Failing to do so will no completely solve your problem.

==Cause==

[[File:Sponge-element.jpg|200 px|Damper to be replaced]]

The cause are damping elements (small sponges) that are having a glue like effect on the movement of the pieces that control when the printing begins. There are 3 solenoids and most probably all of them need to be cleaned up and the sponge-like dampening elements replaced.

=Solution=

==Disassemble the printer==

<div style="display: inline; width: 300px; float: right;">
[[File:Solenoids marked.jpg|300 px]]
</div>
<div style="display: inline; width: 650px; float: right;">
[[File:Sideview.jpg|600 px|Sideview]]
</div>

.. in order to get to the solenoids involved. Steps:
* Turn printer off
* Remove the electrical cable and the the network/usb/LPT data cable
* Remove the toner/laser element and store it in a closed box because it is sensitive to light
* Remove the paper magazine
* Remove the 2 screws securing the top cover of the laser unit, take the cover up by lifting it where the screws were
* Remove the cover of the memory extension by removing the crew on the back side (down, "left" when looking at the back side) and pull it to get it rotated and out
* Using a screwdriver gently lift and push aside the side cover on the left side (when looking at the back side of the printer) at the top - back, top - front, front - up, front - down and the cover can be removed now displaying the side as in the picture Sideview.jpg.
* Remove the connector in the middle of the mainbord
* Remove the three screws of the mainboard, push it gently to the top
* Unscrew the plastic protection of the solenoids and remove it (wires need to be taken out of the fixing elements).
* Remove the connectors for the solenoids and unscrew them, taking them out to clean them

==Replace the the sponge-elements==

[[File:IMAG2167.jpg|150 px|Sideview]]

.. and clean up the solenoids. I got a very inexpensive solution - from a general store got pads that are glued under furniture e.g. to protect the floor. You have to get something that is about 2 mm thick and a little bit elastic. Then cut pieces (small damping elements) out of it that are similar in form with the sponges to be replaced, use a knife and an textile pad with alcohol to clean up the place and glue the new damping elements into place.

==Mount back the printer==

Same procedure as above in the reverse order:
* Solenoids, plastic cover, mainbord, ...

HowTo fix page offset for Kyocera FS-1020

2017-02-12T15:40:31Z

Rac2:

=Summary=

==Problem==

Printing on my old Kyocera FS-1020 works without any issues but the page alignment is often wrong. Pages have a variable offset, there is no correlation from one page to another. Some pages start with a negative offset, some with positive offset, sometimes as big as centimeters.

==Cause==

<div style="display: inline; width: 220px; float: right;">
[[File:Sponge-element.jpg|100 px|Damper to be replaced]]
</div>

The cause are damping elements (small sponges) that are having a glue like effect on the movement of the pieces that control when the printing begins. There are 3 solenoids and most probably all of them need to be cleaned up and the sponge-like dampening elements replaced.

=Solution=

==Disassemble the printer==

<div style="display: inline; width: 300px; float: right;">
[[File:Solenoids marked.jpg|300 px]]
</div>
<div style="display: inline; width: 600px; float: right;">
[[File:Sideview.jpg|600 px|Sideview]]
</div>

.. in order to get to the solenoids involved. Steps:
* Turn printer off
* Remove the electrical cable and the the network/usb/LPT data cable
* Remove the toner/laser element and store it in a closed box because it is sensitive to light
* Remove the paper magazine
* Remove the 2 screws securing the top cover of the laser unit, take the cover up by lifting it where the screws were
* Remove the cover of the memory extension by removing the crew on the back side (down, "left" when looking at the back side) and pull it to get it rotated and out
* Using a screwdriver gently lift and push aside the side cover on the left side (when looking at the back side of the printer) at the top - back, top - front, front - up, front - down and the cover can be removed now displaying the side as in the picture Sideview.jpg.
* Remove the connector in the middle of the mainbord
* Remove the three screws of the mainboard, push it gently to the top
* Remove the connectors for the solenoids and unscrew them to be able to clean them

==Replace the the sponge-elements==

.. and clean up the solenoids.

==Replace the dampers==

==Mount back the printer==

File:IMAG2167.jpg

2017-02-12T15:16:38Z

Rac2: protection pads for furniture

protection pads for furniture

File:Sponge-element.jpg

2017-02-12T15:15:21Z

Rac2: sponge-element to be replaced

sponge-element to be replaced

File:Solenoid-04-05.jpg

2017-02-12T15:14:49Z

Rac2: sideview of solenoids 04 and 05 from Kyocera FS-1020

sideview of solenoids 04 and 05 from Kyocera FS-1020

File:Solenoid-03.jpg

2017-02-12T15:14:07Z

Rac2: lower solenoid on Kyocera FS-1020

lower solenoid on Kyocera FS-1020

File:Solenoids marked.jpg

2017-02-12T15:13:10Z

Rac2: Sideview Kyocera FS-1020 with marked solenoids

Sideview Kyocera FS-1020 with marked solenoids

File:Sideview.jpg

2017-02-12T15:12:34Z

Rac2: Sideview Motherboard Kyocera FS-1020

Sideview Motherboard Kyocera FS-1020

HowTo fix page offset for Kyocera FS-1020

2017-02-12T14:43:55Z

Rac2: Created page with "=Summary= ==Problem== Printing on my old Kyocera FS-1020 works without any issues but the page alignment is often wrong. Pages have a variable offset, there is no correlatio..."

Main Page

2017-02-12T14:35:28Z

Rac2:

=Welcome=

Welcome to [http://www.racsoftware.com racsoftware.com]! This '''wiki''' is used to host the content of

* [[Technical articles index | digital photography articles]] published later on [http://digitalphotography.racsoftware.com digitalphotography.racsoftware.com]

* [http://www.racsoftware.com/imageconverter.php AZImage] related stuff
** [[AZImage translations home | Translations]] files
** Online [[AZImage help index | Help]]
** [[AZImage development news | News]] from the development team

* [[TRoStringGrid home | TRoStringGrid]] related stuff

* [[Other technical articles index | Other topics]] like HowTo, Quickguides to foreign products and so on

=New Articles=

Our newest contributions are listed here
* [[HowTo using TP-Link WN725 on Raspberry Pi running Pidora]]
* [[HowTo fix page offset for Kyocera FS-1020]]

Due to the possibilities of the wiki you have the possibility and of course are welcome to contribute to any of this areas. Thank you for your help!

HowTo using TP-Link WN725 on Raspberry Pi running Pidora

2016-03-27T12:37:07Z

Rac2:

<div class="noautonum">__TOC__</div>

=Introduction=

This guide is about using the TP-Link TL-WN725N USB WiFi Dongle on a Raspberry Pi and Pidora. After spending more than 1 day searching on Google and trying all possible things, I succeed making it work.

I am using a minimal Pidora installation with no NetworkManager. Since it was challenging enough I have decided to put it all together here.

If this page helps you, please link to it (e.g. from discussion groups) or put a nice comment on the discussion page :). This page is intended for people that have a clear understanding about Linux (Fedora preferably). If you are a beginner, you can follow the steps, but you need to google a little bit about what is the meaning of each command.

The TL-WN725N USB WiFi Dongle requires enough current to make the Pi reboot if you insert or remove it when working! Please shutdown your system before inserting or removing the adapter.

=Step 1: Firmware=

If you get something like "Direct firmware load for rtlwifi/rtl8188eufw.bin failed with error -2" when booting with the Wifi Dongle installed or Typing lsusb is not displaying the device, then you are not having the firmware installed. You have to Download and install the firmware:
* download the firmware to a subdirectory rtl8188eu/
* copy the firmware (file rtl8188eufw.bin) from the download directory to /lib/firmware/rtlwifi/
* reboot to activate the firmware (you can wait with this step, make it after step 2)

git clone https://github.com/lwfinger/rtl8188eu.git
mkdir -m=777 -v -p /lib/firmware/rtlwifi/
cp rtl8188eu/rtl8188eufw.bin /lib/firmware/rtlwifi/
chmod 444 /lib/firmware/rtlwifi/rtl8188eufw.bin
reboot

The success of this step means that the device is recognized (lsusb lists it like below).

-bash-4.2# lsusb
Bus 001 Device 004: ID 0bda:8179 Realtek Semiconductor Corp. RTL8188EUS 802.11n Wireless Network Adapter

= Step 2: Activate the corresponding kernel module =

Check if the kernel module is loaded with lsmod. Probably it is not, so you have to:
* download the kernel module

wget https://dl.dropboxusercontent.com/u/80256631/8188eu-20160319.tar.gz ''' -> is anyone out there able to provide a better link as the dropbox?'''
tar xzvf 8188eu-20160319.tar.gz
cp 8188eu.conf /etc/modprobe.d/ ''' -> disable power management'''
cp 8188eu.ko /lib/modules/4.1.20+/kernel/drivers/net/wireless/8188eu.ko ''' -> copy the kernel module to the proper location'''
chmod 644 /lib/modules/4.1.20+/kernel/drivers/net/wireless/8188eu.ko
reboot ''' -> alternatively you can use modprobe and insmod to activate it on the fly if see the device with lsusb, i.e. rebooted after step 1'''

Now lsmod should list the

-bash-4.2# lsmod
Module Size Used by
8188eu 931781 0

ifconfig -a should list the device and provide you with the MAC address and the device id (e.g. wlan0).

= Step 3: the ifcfg-wlan0 file =

setup the /etc/sysconfig/network-scripts/ifcfg-wlan0 file

NAME="wlan0"
DEVICE=wlan0
HWADDR=XX:XX:XX:XX:XX:XX '''<- put the MAC of the WiFi Adapter here, you can get it with ifconfig'''

# DHCP Version --------------------
USERCTL=yes
NM_CONTROLLED=no
ONBOOT=yes
BOOTPROTO=dhcp
# Fixed IP version ----------------
#IPADDR=192.168.1.10
#GATEWAY=192.168.1.1
#NETMASK=255.255.255.0
#BOOTPROTO=static
# Wireless configuration ----------
TYPE=Wireless
MODE=Managed
# Settings provided by WPA Supplicant, not needed here
#ESSID="XXX"
#RATE=54Mb/s
IPV6INIT=no
IPV4_FAILURE_FATAL=no
IPV6_FAILURE_FATAL=no

= Step 4: configure wpa-supplicant =

The wpa-supplicant is needed to authenticate into WAP secured networks. If you are using a network without security it is not needed. But hopefully no one is exposing his network, so I document it here for WPA2 encryption.
* generate the passphrase
wpa_passphrase "Your Wireless SSID" testpassword > /root/wirelesspassword.conf

now you have in /root/wirelesspassword.conf

network={
ssid="Your Wireless SSID"
#psk="testpassword" '''<- delete this line since it lists your password in clear text! You do not need it, the passphrase is enough'''
psk=5badfeae3f0f83a75f58cb18d2e483c6a72b1f3c13f2b7402747ad0d406b5d30
}

configure other options in /etc/wpa_supplicant/wpa_supplicant.conf

-bash-4.2# cat /etc/wpa_supplicant/wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=root
country=DE
mac_addr=0 '''-> I had once problems with a network that used also MAC Filtering. This helped. '''
preassoc_mac_addr=0 '''-> I had once problems with a network that used also MAC Filtering. This helped. '''

network={
ssid="RAC Home"
proto=WPA RSN '''-> use WPA2 with AES'''
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
}

= Step 5: autostart the wpa-supplicant and the dhclient =

Add the wpa-supplicant and dhclient at the end the ifup script for wireless in /etc/sysconfig/network-scripts/ifup-wireless

wpa_supplicant -Dwext -iwlan0 -c /root/wirelesspassword.conf -B
dhclient wlan0

= Step 6: ativate the wireless adapter and connect to network =

Manually you start it by calling
-bash-4.2# ifup-wlan0

I start my network in /etc/rc.d/rc.local by explicitely calling ifup wlan0, if it does not start. (too lazy to find out what service does it really and activate it). Please post you questions on the discussion page. Feel free to improve the page if you wish (need to login to the wiki).

HowTo using TP-Link WN725 on Raspberry Pi running Pidora

2016-03-27T12:24:40Z

Rac2:

<div class="noautonum">__TOC__</div>

=Introduction=

This guide is about using the TP-Link TL-WN725N USB WiFi Dongle on a Raspberry Pi and Pidora. After spending more than 1 day searching on Google and trying all possible things, I succeed making it work.

I am using a minimal Pidora installation with no NetworkManager. Since it was challenging enough I have decided to put it all together here. If it helps you, please link to this page (e.g. from discussion groups) or put a nice comment on the discussion page :). This page is intended for people that have a clear understanding about Linux (Fedora preferably). If you are a beginner, you can follow the steps, but you need to google a little bit about what is the meaning of each command.

The TL-WN725N USB WiFi Dongle requires enough current to make the Pi reboot if you insert or remove it when working! Please shutdown your system before inserting or removing the adapter.

=Step 1: Firmware=

If you get something like "Direct firmware load for rtlwifi/rtl8188eufw.bin failed with error -2" when booting with the Wifi Dongle installed or Typing lsusb is not displaying the device, then you are not having the firmware installed. You have to Download and install the firmware:
* download the firmware to a subdirectory rtl8188eu/
* copy the firmware (file rtl8188eufw.bin) from the download directory to /lib/firmware/rtlwifi/
* reboot to activate the firmware (you can wait with this step, make it after step 2)

git clone https://github.com/lwfinger/rtl8188eu.git
mkdir -m=777 -v -p /lib/firmware/rtlwifi/
cp rtl8188eu/rtl8188eufw.bin /lib/firmware/rtlwifi/
chmod 444 /lib/firmware/rtlwifi/rtl8188eufw.bin
reboot

The success of this step means that the device is recognized (lsusb lists it like below).

-bash-4.2# lsusb
Bus 001 Device 004: ID 0bda:8179 Realtek Semiconductor Corp. RTL8188EUS 802.11n Wireless Network Adapter

= Step 2: Activate the corresponding kernel module =

Check if the kernel module is loaded with lsmod. Probably it is not, so you have to:
* download the kernel module

wget https://dl.dropboxusercontent.com/u/80256631/8188eu-20160319.tar.gz ''' -> is anyone out there able to provide a better link as the dropbox?'''
tar xzvf 8188eu-20160319.tar.gz
cp 8188eu.conf /etc/modprobe.d/ ''' -> disable power management'''
cp 8188eu.ko /lib/modules/4.1.20+/kernel/drivers/net/wireless/8188eu.ko ''' -> copy the kernel module to the proper location'''
chmod 644 /lib/modules/4.1.20+/kernel/drivers/net/wireless/8188eu.ko
reboot ''' -> alternatively you can use modprobe and insmod to activate it on the fly if see the device with lsusb, i.e. rebooted after step 1'''

Now lsmod should list the

-bash-4.2# lsmod
Module Size Used by
8188eu 931781 0

ifconfig -a should list the device and provide you with the MAC address and the device id (e.g. wlan0).

= Step 3: the ifcfg-wlan0 file =

setup the /etc/sysconfig/network-scripts/ifcfg-wlan0 file

NAME="wlan0"
DEVICE=wlan0
HWADDR=XX:XX:XX:XX:XX:XX '''<- put the MAC of the WiFi Adapter here, you can get it with ifconfig'''

# DHCP Version --------------------
USERCTL=yes
NM_CONTROLLED=no
ONBOOT=yes
BOOTPROTO=dhcp
# Fixed IP version ----------------
#IPADDR=192.168.1.10
#GATEWAY=192.168.1.1
#NETMASK=255.255.255.0
#BOOTPROTO=static
# Wireless configuration ----------
TYPE=Wireless
MODE=Managed
# Settings provided by WPA Supplicant, not needed here
#ESSID="XXX"
#RATE=54Mb/s
IPV6INIT=no
IPV4_FAILURE_FATAL=no
IPV6_FAILURE_FATAL=no

= Step 4: configure wpa-supplicant =

The wpa-supplicant is needed to authenticate into WAP secured networks. If you are using a network without security it is not needed. But hopefully no one is exposing his network, so I document it here for WPA2 encryption.
* generate the passphrase
wpa_passphrase "Your Wireless SSID" testpassword > /root/wirelesspassword.conf

now you have in /root/wirelesspassword.conf

network={
ssid="Your Wireless SSID"
#psk="testpassword" '''<- delete this line since it lists your password in clear text! You do not need it, the passphrase is enough'''
psk=5badfeae3f0f83a75f58cb18d2e483c6a72b1f3c13f2b7402747ad0d406b5d30
}

configure other options in /etc/wpa_supplicant/wpa_supplicant.conf

-bash-4.2# cat /etc/wpa_supplicant/wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=root
country=DE
mac_addr=0 '''-> I had once problems with a network that used also MAC Filtering. This helped. '''
preassoc_mac_addr=0 '''-> I had once problems with a network that used also MAC Filtering. This helped. '''

network={
ssid="RAC Home"
proto=WPA RSN '''-> use WPA2 with AES'''
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
}

= Step 5: autostart the wpa-supplicant and the dhclient =

Add the wpa-supplicant and dhclient at the end the ifup script for wireless in /etc/sysconfig/network-scripts/ifup-wireless

wpa_supplicant -Dwext -iwlan0 -c /root/wirelesspassword.conf -B
dhclient wlan0

= Step 6: ativate the wireless adapter and connect to network =

Manually you start it by calling
-bash-4.2# ifup-wlan0

I start my network in /etc/rc.d/rc.local by explicitely calling ifup wlan0, if it does not start. (too lazy to find out what service does it really and activate it). Please post you questions on the discussion page. Feel free to improve the page if you wish (need to login to the wiki).