AR-C270 (serv.man14). (Section 10) Self Diag Message Troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 6

Main 

code

Sub

code

Title (Content)

Section 

Operation mode

Remedy

NOTE

U5

3

RADF timing sensor trouble

RADF

RADF

Power
Source-ON

U5

11

RADF paper feed motor trouble

RADF

RADF

Power
Source-ON

U6

9

Large capacity tray (LCC) lift motor
trouble

Large capacity tray

Paper feed

SIM 15

U6

20

PCU MAIN PWB-Large capacity tray
(LCC) communication trouble

Large capacity tray
control PWB / PCU
MAIN PWB

Warm-up /
Initialize

Power
Source-ON

U6

21

Large capacity tray (LCC) transport
motor trouble

Large capacity tray

Paper feed

Power
Source-ON

U6

22

Large capacity tray (LCC) 24v power
trouble

Large capacity tray  All modes

Power
Source-ON

U7

0

RIC communication trouble

PCU PWB

RIC
communication 

Power
Source-ON

UC

0

ICU SCAN PWB - CPT PWB
communication trouble

ICU SCAN PWB /
CPT PWB

Copy

Power
Source-ON

UC

1

CPT board program trouble

CPT PWB

Warm-up /
Initialize

Power
Source-ON

UC

2

CPT board ASIC trouble

CPT PWB

Warm-up /
Initialize

Power
Source-ON

UC

3

CPT board ROM trouble

CPT PWB

Warm-up /
Initialize

Power
Source-ON

UC

4

CPT board RAM trouble

CPT PWB

Warm-up /
Initialize

Power
Source-ON

UC

5

CPT board model code data trouble

ICU MAIN PWB /
CPT PWB

Warm-up /
Initialize

Power
Source-ON

Main 

code

Sub

code

Title

Phenomena Display

Lamp

Message

Detail

In shading correction, the CCD white reading level is abnormal (with the scanner lamp OFF).

Section

Scanner (reading) / ICU SCAN PWB

Operation mode

Warm-up / Initialize

Note

Case 1

Trouble
position/Cause

Improper CCD white level gain
Too great CCD white level gain

Remedy

(Check)
  1) Use SIM 63-1 to check the values of ADJUST ODD GAIN and ADJUST EVEN GAIN of each color
      of R/G/B. (There are six values in total.) (AR-C150)
  2) Add 25 to each value of GAIN ODD and GAIN EVEN of R/G/B checked in procedure 1) and make
      notes of the total values. (AR-C150)
  3) Enter the SIM 46-6 mode, and replace each value of GAIN ODD and GAIN EVEN of R/G/B with 
      the total values calculated in procedure 2). (Input the new value.) (AR-C150)
  4) Cancel the simulation.
  5) Turn OFF/ON the power, and shading operation will be performed. 

(Repair) Power OFF-ON

(After work)

Note

This trouble occasionally happens when the CCD unit (with the lens) is replaced. 

Case 2

Trouble
position/cause

Bad connection of the flat cable between the CCD unit and the ICU SCAN PWB. 

Remedy

(Check) Check connection of the flat cable between the CCD unit and the ICU SCAN PWB.

(Repair) Replace the flat cable between the CCD unit and the ICU SCAN PWB. / Power Source-ON

(After-work)

Note

10 –  6A