Ricoh CL7000 Hi, The error is : Replace Black Dev.Unit(TypeD). I replace the Black Development Unit and the message appear on the display again. What can I do ? Please help me Zoia

sc 491 is error signal is detected for 0.2 seconds when charging the drum or development.
• High voltage leak
• Broken harness
• Defective drum unit or development unit
• Defective high voltage supply unit

1. Defective electrical connection for the TD sensor.

2. TD sensor not installed correctly

1. Take out the dev unit

and put it back in. If that

does not work, replace

the dev unit.

2. Press the TD sensor

firmly against the frame
of the development unit.

sc386 = an error with the black developer. This could be caused by something in the DV unit itself, or the black toner. If you've just replaced either one of these recently, try reinstalling them and resetting the machine. Otherwise, the black development unit probably needs to be replaced.

sc 375= Vt error [Yellow] (toner density sensor error)
sc 387=Development gamma error Yellow

it looks like there is a problem with your yellow development unit.
it may not set in properly or needs to be replaced.

Sc 491 straight from manual

High voltage power: Drum/ development bias output error
An error signal is detected for 0.2 seconds when charging the drum or
development.

High voltage leak

Broken harness

Defective drum unit or development unit

Defective high voltage supply unit

1. Check or replace the harness.
2. Replace the drum unit or paper transfer unit.
3. Replace the high voltage supply unit.

Internal counters control this. Yes! There are 4 of these units: Black, Cyan, Magenta, Yellow, and also 2 drums (Black and colour) You can continue to use the machine. You will likely see a deterioration in quality before long. You will have to contact a Supply company to acquire the units, but you can replace them yourself. Here is a link to the manual if you don't have one:

http://www.ricoh-usa.com/downloads/manuals/printers/cl7000/manuals/CL7000%20Printer%20Maintenance%20Guide.pdf

Hope this helps.

Replace the Fusing Oil

Hi there you will need to replace the development motor but first try the following.


Entering the Service Mode
There are two ways to enter the service mode.
Method 1: Turn the machine on while pressing the “On Line” key and “Escape” key
together until the above message in the illustration appears on the display.
NOTE: If you switch the machine off, any jobs stored on the hard disk using the
sample print and protected print features will be deleted.
Check first with the user tools to see if there are any jobs stored with these
features
(Menu key - Sample Print, or Protected Print).
Method 2: Press the “Up/Down arrow” keys together for about 5 seconds, then
press the “Enter” key.
The above message shown in the illustration appears on the display.
NOTE: The machine automatically goes off line when you enter the service mode.

Using the up down arrows select Engine and enter by pressing enter or # key.

Using the up down arrows select mode 5 then enter using enter or # key then select 810 (SC reset) press enter then if you want to select 809 (SC Detection ON/OFF) Enter and select 1 to disable. Escape or return key all the way out and exit. Turn the machine off then on again and test if the same problem then replace the Dev unit if still having the problem then replacement of the motor likely. I can email you the complete service manual if you like.

Thanks J

Hi there you will need to replace the development motor but first try the following.


Entering the Service Mode
There are two ways to enter the service mode.
Method 1: Turn the machine on while pressing the “On Line” key and “Escape” key
together until the above message in the illustration appears on the display.
NOTE: If you switch the machine off, any jobs stored on the hard disk using the
sample print and protected print features will be deleted.
Check first with the user tools to see if there are any jobs stored with these
features
(Menu key - Sample Print, or Protected Print).
Method 2: Press the “Up/Down arrow” keys together for about 5 seconds, then
press the “Enter” key.
The above message shown in the illustration appears on the display.
NOTE: The machine automatically goes off line when you enter the service mode.

Using the up down arrows select Engine and enter by pressing enter or # key.

Using the up down arrows select mode 5 then enter using enter or # key then select 810 (SC reset) press enter then if you want to select 809 (SC Detection ON/OFF) Enter and select 1 to disable. Escape or return key all the way out and exit. Turn the machine off then on again and test if the same problem then replace the Dev unit if still having the problem then replacement of the motor likely. I can email you the complete service manual if you like.

Thanks J

Hi there you will need to replace the development motor but first try the following.


Entering the Service Mode
There are two ways to enter the service mode.
Method 1: Turn the machine on while pressing the “On Line” key and “Escape” key
together until the above message in the illustration appears on the display.
NOTE: If you switch the machine off, any jobs stored on the hard disk using the
sample print and protected print features will be deleted.
Check first with the user tools to see if there are any jobs stored with these
features
(Menu key - Sample Print, or Protected Print).
Method 2: Press the “Up/Down arrow” keys together for about 5 seconds, then
press the “Enter” key.
The above message shown in the illustration appears on the display.
NOTE: The machine automatically goes off line when you enter the service mode.

Using the up down arrows select Engine and enter by pressing enter or # key.

Using the up down arrows select mode 5 then enter using enter or # key then select 810 (SC reset) press enter then if you want to select 809 (SC Detection ON/OFF) Enter and select 1 to disable. Escape or return key all the way out and exit. Turn the machine off then on again and test if the same problem then replace the Dev unit if still having the problem then replacement of the motor likely. I can email you the complete service manual if you like.

Thanks J