Question about Ricoh Aficio 450 Copier

Open Question

DEVELOPEMENT BIAS LEAK - Ricoh Aficio 450 Copier

Posted by Anonymous on

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have a machine ricoh mp201 with code sc391 afta changing the toner motor and developer


Development bias leak
The polling module detects a
current leak of the development
bias.
?? Loose connection of the PCU
?? Defective high voltage supply
board

Apr 13, 2017 | Ricoh Office Equipment & Supplies

Tip

Shorted Rectifier Diode (fuse keeps blowing)


jdvillanueva_14.jpg
This CRT tv is dead set, no reaction when the power button is pressed(no standby led light). I've open the back panel and check the faulty parts.
jdvillanueva_15.jpg

As you can see the fuse was badly burnt-out indication of excessive current due to short circuit.
jdvillanueva_17.jpg

I've checked the parts feeding the AC line to the power supply board (Power cord, VDR, Ceramic capacitor, Coil, Posistor, Degaussing coil) one by one and I've found out that one of the four rectifier diode has a leak which caused the glass fuse burnt-out.
Here's how to test the rectifier diode.

Good Diode
Note : Forward and reverse bias depend on what type of ohmmeter are you using, here I'm using a Japan Standard(Sanwa Brand).
jdvillanueva_21.jpg

Using an ohmmeter set it to X10 to see much easier the leak from the diode in reverse bias.

Forward Bias : test the diode by connecting the red test prod of the tester to anode and then the black test prod to cathode of diode. You will see the pointer will reads a faily low resistance(above picture).
jdvillanueva_22.jpg

Reverse Bias : test the diode by connecting the red test prod of the tester to cathode and then the black test prod to anode of diode. You will see at the picture(above) that the pointer didn't react (remains in infinity). This is a good diode.


Bad(leaky) Diode
jdvillanueva_23.jpg

Forward Bias will reads fairly low resistance.
jdvillanueva_24.jpg

Reverse bias unlike the good diode the pointer will also reads a fairly low resistance.

After confirming that the diode caused the fuse from blowing I've decided to replaced all four diodes since I have a lots in my stocks.
jdvillanueva_25.jpg

Remember that when you installing the new diode on the board, make sure that you will make it in the right polarity.

jdvillanueva_26.jpg

This steps is also applicable in the DVD Player,Flat panel, Projection, LCD TV, you have to disregard only the posistor and degaussing coil.

Have a nice day!
Thanks for using Fixya.

Jdvillanueva

on Mar 02, 2011 | Televison & Video

1 Answer

Ricoh aficio 2550 code error SC411


Ricoh Aficio 250 Error Codes
Code
SC411
Description
Separation bias error
A separation bias leak signal is detected.
Causes
• High voltage supply board defective • Poor connection of the PCU • Discharge brush defective

Apr 10, 2017 | Ricoh Office Equipment & Supplies

1 Answer

Canon c3100 display say wait


No error code after waiting? Could be heater or toner or Image formation-developement. addition function 2 and 8 at the same time additional functions again. Copier>display>error . If 20 code exists developement if 0-8 heater

Jan 09, 2012 | Canon iR 2016i Black and White Copier

1 Answer

395 code


395 Development output abnormal A development bias leak signal is detected. High voltage output to the development unit exceeded the upper limit (65%) for 60 ms. High voltage supply board defective Poor connection at the development bias terminal Poor connection at the high voltage supply board

if you change the developer and initialize'it it should work,if not do the above.

Jun 29, 2010 | Ricoh Aficio 1045 Black and White Copier

1 Answer

395 Code in 1035????


395 Development output abnormal A development bias leak signal is detected. High voltage output to the development unit exceeded the upper limit (65%) for 60 ms. High voltage supply board defective Poor connection at the development bias terminal Poor connection at the high voltage supply board

if you change the developer and initialize'it it should work,if not do the above.

Jun 18, 2010 | Ricoh Aficio 1035 Copier

1 Answer

My Ricoh 2232c copier has displayed error SC374 can you tell me what this means?



SC322 Laser synchronization error SC324 LD drive current over SC390 TD sensor error 1 SC374 Development bias leak SC393 TD sensor error 2 SC401 Transfer roller leak error 1

Jan 14, 2010 | Ricoh Aficio 2232C Color Copier

2 Answers

ERROR SC410 ON AFICIO 4506.. ANY HELP APPRECIATED adanquah@gmail.com


I know an SC 411 means this:

SC411: Separation bias leak error
-Definition- [B]
A separation bias leak signal is detected.
- Possible causes -
• High voltage supply board defective
• Poor connection of the PCU
• Discharge plate defective

Usually a 410 would be in the same ballpark on a Ricoh computer. Unfortunately I don't have the service manuals for 4500 series machines. If you can get a hold of a Ricoh tech in your area, it would be a good idea to rest the power supply and check the pcu as well.

Feb 18, 2009 | Ricoh 4506 Copier

2 Answers

INFO


Get a new HDD for the SC 360
and connect the Exaust fan for the SC490 might be disconnected.

Both in the back of the machine.

Nov 10, 2008 | Ricoh Aficio 450 Copier

Not finding what you are looking for?
Ricoh Aficio 450 Copier Logo

Related Topics:

94 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ricoh Office Equipment & Supplies Experts

gggg

Level 3 Expert

904 Answers

Adorjani Laszlo

Level 3 Expert

1316 Answers

quennie732

Level 2 Expert

422 Answers

Are you a Ricoh Office Equipment and Supply Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...