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splblazer91
04-21-2016, 10:04 PM
Anyone have a fix for this?
We have replaced the FSB, Expansion Board and Print Head unit. Still no luck.

mphile
05-24-2016, 04:56 PM
Good day you all,

I have got the same problem and mine is a bit different, I have gone to replace Cyan Dev Unit and BOOOOM!! when I turn on the machine it comes with error code C5603. Now machine wont respond even if you re-install the old unit. Please note the machine was not asking for dev unit to be replaced, I had to replace because of copy quality. Any help will be appreciated.

splblazer91
05-24-2016, 05:13 PM
Mine ended up being the PRCB.

javier4065
07-07-2017, 10:25 PM
Hello friend where is the front board and the print control board because I have de same problem c5603 First display says c2563 thanks in advance

Synthohol
07-07-2017, 10:46 PM
FSB is behind the plate (3 screws) that the DV units hide behind.

also...

3.10.12 C5603
(1) Contents


Trouble type
Expansion control board communication error


Trouble code
C5603


Rank
C


Detection timing
Communication error is detected in expansion control board.


Trouble isolation
-


Relevant electrical parts
• Expansion control board (EXCB)
• Front side board (FRB)
• PH unit
• Printer control board (PRCB)



(2) Procedure


Step
Action
Control signal
Location of electrical components


1
Reboot the machine.
-
-


2
Check the connector between EXCB-PRCB for proper
connection and correct as necessary.
-
-


3
Check the connector between FRB CN5-PH unit for
proper connection and correct as necessary.
-
-


4
Check the connector between FRB CN2-PRCB CN8
for proper connection and correct as necessary.
-
-


5
Replace EXCB
-
-


6
Replace FRB
-
-


7
Replace PH unit
-
-


8
Replace PRCB
-
-


http://www.copytechnet.com/forums/attachments/konica-minolta/37085d1499460979-c-5603-554e-excb-jpg http://www.copytechnet.com/forums/attachments/konica-minolta/37086d1499461144-c-5603-554e-fsb-jpg
3708537086

javier4065
07-10-2017, 02:32 AM
FSB is behind the plate (3 screws) that the DV units hide behind.

also...there is not way to reset this code maybe a service program thanksh

3.10.12 C5603
(1) Contents


Trouble type
Expansion control board communication error


Trouble code
C5603


Rank
C


Detection timing
Communication error is detected in expansion control board.


Trouble isolation
-


Relevant electrical parts
Expansion control board (EXCB)
Front side board (FRB)
PH unit
Printer control board (PRCB)



(2) Procedure


Step
Action
Control signal
Location of electrical components


1
Reboot the machine.
-
-


2
Check the connector between EXCB-PRCB for proper
connection and correct as necessary.
-
-


3
Check the connector between FRB CN5-PH unit for
proper connection and correct as necessary.
-
-


4
Check the connector between FRB CN2-PRCB CN8
for proper connection and correct as necessary.
-
-


5
Replace EXCB
-
-


6
Replace FRB
-
-


7
Replace PH unit
-
-


8
Replace PRCB
-
-


http://www.copytechnet.com/forums/attachments/konica-minolta/37085d1499460979-c-5603-554e-excb-jpg http://www.copytechnet.com/forums/attachments/konica-minolta/37086d1499461144-c-5603-554e-fsb-jpg
3708537086there is not way to reset this code maybe a service program because tje first problem was changing developer thanks

Synthohol
07-10-2017, 06:34 AM
turn it off with the main switch inside the door, hold down panel reset while turning it back on, close the door and hold the reset until you see a black dot in the upper right. you can let go.
next in a few will be a box that says trouble reset. touch it, it should say OK.
power off and wait 10 full seconds and power up.
let us know.

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