C 471 in e studio 351c

[Nazakat]

Dear All

I have problem in e studio 351c.It appears C 471 in no time as we turned on Machine. Heater Board is ok,Heater Section is Ok, But Logic Board seems faulty.When we install This Logic Board to another Machine,it gives same error.Can i rectify it by upgrading the machine? or anyother solutions????

[Mr Spock]

The only thing is to reset the code 08-400-0 and see if it goes away if not then the pwb will need to be replaced.

[Sbarro]

[C471/472/475] IH power voltage abnormality or IH initial abnormality
1. Check the AC input voltage
Check if the AC input voltage is within the specified range.
(especially when the heater becomes ON after the power is turned ON (the copier is warming up))
2. Check the thermostat
Check if the thermostat is blown.
3. Check the IH control board
(1) Check if the AC input connector on the IH control board, the LGC I/F connectors CN455 is disconnected?
(2) Check if the fuse on the IH control board has blown.
(3) Replace the IH control board.
4. Check the LGC board
(1) Check if the connector CN334 are disconnected.
(2) Check if the conductor pattern on the board is short- or open-circuited.
(3) Replace the LGC board.
5. Clear the status counter
Change the values "10", "11", "12" of the status counter (08-400) to "0".

[Nazakat]

	Quote:			Originally Posted by Mr Spock
	The only thing is to reset the code 08-400-0 and see if it goes away if not then the pwb will need to be replaced.

I have crossed checked the boards but when i replace Logic Board it appears c 471.When i replace PWB no significant change occured.As i place only Logic Board to Another(Already Working)machine,it give error.

[Mr Spock]

	Quote:			Originally Posted by Nazakat
	I have crossed checked the boards but when i replace Logic Board it appears c 471.When i replace PWB no significant change occured.As i place only Logic Board to Another(Already Working)machine,it give error.

The code locks the machine until the code has been reset (08-400-0). This is stored in the nvram located on the logic board. If it returns then the logic pwb or the nvram chip is bad. Since this happens on the "working" machine then reset the code and see if the error goes away if not then the board is bad. If it goes away with the board in a working machine then check the parts mentioned in SBARRO's post.

[Nazakat]

I have installed Logic Board to another machine last night.it started working as i have applied codes 08-665,666,667,669 after installing board.made some copies and it was fine.(Though it was showing READY(Toner not Recognised)) but machine was producing copies.In the morning same error C-471 occured.
Any other Idea about it?

	Quote:			Originally Posted by Mr Spock
	The code locks the machine until the code has been reset (08-400-0). This is stored in the nvram located on the logic board. If it returns then the logic pwb or the nvram chip is bad. Since this happens on the "working" machine then reset the code and see if the error goes away if not then the board is bad. If it goes away with the board in a working machine then check the parts mentioned in SBARRO's post.

[Sbarro]

Check Power Supply

[Nazakat]

I have checked Logic Board in three different machines.Only Logic board is creating problem.I have upgraded machine through usb but in vain.any other idea?

	Quote:			Originally Posted by Sbarro
	Check Power Supply