DOWNLOAD Sharp MX-6500N / MX-7500N (serv.man21) Service Manual ↓ Size: 561.77 KB | Pages: 66 in PDF or view online for FREE

MX-7500N  TROUBLESHOOTING  7 – 3

Engine trouble 2

PCU troubles (motor, 
fusing, etc.)

PCU

C1 (01, 10, 14)
C4 (00, 01, 20, 21, 
30, 31)
F2 (22, 40, 64, 70, 
74, 91)
H2 (00, 01, 02, 03, 
04, 05, 06, 07)
H3 (00, 01, 02)
H4 (00, 01, 02, 30, 
31, 32)
H5 (01)
H7 (10, 11)
L4 (02, 03, 06, 07, 
08, 16, 17, 18, 19, 
20, 24, 29, 31, 32, 
34, 35, 36, 39, 40, 
41, 42, 43, 44, 48, 
49, 57, 60, 61, 63)
L8 (01, 02, 11, 12)
U2 (90, 91)

5

5

5

5

5

5

*10

5

5

Color system 
trouble

General PCU color 
system breakdown

C1 (03, 05, 07)
E7 (21, 22, 23, 25, 
26, 27, A1, A2, A3)
F2 (23, 24, 25, 41, 
42, 43, 65, 66, 67, 
71, 72, 73, 75, 76, 
77, 92, 93, 94)

5

*19

5

*19

5

*19

5

*19

5

*19

5

*10
*19

5

*19

5

*19

Paper feed tray 
0 trouble

Paper feed tray 0 
breakdown

U6 (63, 68, 69)

3

3

3
*10

3

Paper feed tray 
1 trouble

Paper feed tray 1 
breakdown

F3 (12)

3

3

3
*10

3

Paper feed tray 
2 trouble

Paper feed tray 2 
breakdown

F3 (22)

3

3

3
*10

3

Paper feed tray 
3 trouble

Paper feed tray 3 
breakdown

F3 (32)

3

3

3
*10

3

Paper feed tray 
4 trouble

Paper feed tray 4 
breakdown

F3 (42)

3

3

3
*10

3

Paper feed tray 
5 trouble

Paper feed tray 5 
breakdown

U6 (09, 23, 24, 29)
UE (10, 11, 12, 13, 
14, 15, 16, 17)

3

3

3
*10

3

Paper feed tray 
6 trouble

Paper feed tray 6 
breakdown

U6 (33, 34, 39)
UE (20, 21, 22, 23, 
24, 25, 26, 27)

3

3

3
*10

3

Paper feed tray 
7 trouble

Paper feed tray 8 
breakdown

U6 (43, 44, 49)
UE (30, 31, 32, 33, 
34, 35, 36, 37)

3

3

3
*10

3

Paper feed tray 
8 trouble

Paper feed tray 8 
breakdown

U6 (73, 74, 79)
UE (40, 41, 42, 43, 
44, 45, 46, 47)

3

3

3
*10

3

Staple trouble

Staple breakdown

F1 (08, 10)

4

4

4

4

4

4
*10

4

4

Saddle stitch 
section trouble

Saddle stitch section 
breakdown

F1 (31, 41, 42, 43, 
44, 45, 46, 51)

4

4

4

4

4

4
*10

4

4

Finisher trouble

After-process 
breakdown

F0 (03, 08, 10, 11, 
14, 15, 18, 19, 20, 
23, 25, 28, 29, 30, 
31, 32, 33, 34, 37, 
40, 41, 42, 43, 44, 
45, 46, 47, 48, 49, 
51, 52, 53, 54, 55, 
56, 70, 71, 72, 73, 
74, 75, 76, 77, 80, 
81, 82, 83, 84, 86)
F1 (00, 03, 15, 19, 
20, 21, 22, 23, 30, 
32, 33, 34, 37, 38, 
52, 60, 90, 96, 97, 
98, 99)

4

4

4

4

4

4
*10

4

4

Inserter trouble

Inserter breakdown 
(except for 
communication 
trouble)

F1 (64, 65, 66, 67)

3

3

3
*10

3

Other troubles

Other troubles

EE (EC, EL, EU)

Process control 
trouble

Process control 
breakdown (PCU 
detection)

F2 (39, 49, 50, 51, 
52, 53, 58, 78, A0, 
A1, A2, A3)

*12

MX-7500N  TROUBLESHOOTING  7 – 4

5: Operation disabled

1: The operation is enabled in a line other than the trouble line.
3: When detected during other than a job, the operation is enabled with a tray other than the trouble tray.
4: When detected during other than a job, the operation is enabled in a section other than the trouble paper exit section. * However, it is valid
only when the escape tray setting has been made.
6: When detected during other than a job, the operation is enabled in the OC mode.
7: When detected in other than a job, the operation is enabled in the OC mode/single surface scan mode.
8: When detected in other than a job, the operation is enabled in other than the duplex color scan mode.
9: When detected during other than a job, the operation is enabled in the black and white mode.

*10: Since communication is enabled, reception can be transferred. (Noted in the list print category of the system setting screen operation
because it is an operation on the system setting screen.)
11: When detected during other than a job, the operation is enabled in other than the DESK and the LCC.

*12: Trouble display message is displayed in 2 lines. (Example: Ready to copy. F2 trouble)

*13: When FIERY (EFI) option is installed, PCL will not operate. (Machine specifications) (Exclusive)

*14: Only FIERY (EFI) option list print (self print) is disabled.
15: When in U2-22, trouble notification cannot be made. When in U2-23, if either of the FAX soft SW or the FAST data cannot be restored,
the data are initialized, disabling trouble notification.
17: Job execution enable only in a format other than high compression PDF.

*19: When the color mode is set to disable in the "Color mode disable setting" of the system setting, the operation is enabled in the black and
white mode.

Operation 
disable trouble

Connection trouble 
(SCU detection)

SCU

A0 (22)

5

5

5

5

5

5

5

5

5

Color system 
trouble (SCU 
detection)

SCU color system 
breakdown (SCU 
detection)

UC (02)

9

9

9

9

9

Color system 
trouble (DSPF 
detection)

SCU color system 
breakdown (DSPF 
detection)

UC (12)

8

8

8

8

8

Anti-copy 
trouble

Anti-copy system

UC (20)

5

5

5

5

5

Anti-copy 
trouble (DSPF 
detection)

Anti-copy system 
(DSPF detection)

UC (30)

7

7

7

7

7

Scanner trouble 
1

EEPROM system

U2 (80, 81)

5

5

5

5

5

Scanner trouble 
2

Scanner section 
breakdown (mirror 
motor, lens, copy 
lamp)

L1 (00)
L2 (11)
L3 (00)
U9(01)

5

5

5

5

5

CCD trouble

CCD breakdown 
(shading, etc.)

E7 (10, 11, 14)

5

5

5

5

5

DSPF/DF 
trouble

DSPF/DF breakdown

U5 (00, 16, 30, 31)

6

6

6

6

6

SPF back 
surface trouble

General troubles in 
the SPF back surface 
scanning section

E6 (10, 11, 14)

7

7

7

7

7

Error history

PCU

F2 (45)

MFP

E7 (02)
U2 (05)

MX-7500N  TROUBLESHOOTING  7 – 5

When booting, two or more troubles in the list below may be detected. In this case, the trouble code of higher priority is displayed.

First

(Low priority)

Last

(High priority)

U2

60

Watermark check error

50

HDD user authentication data check sum error

30

MFPC PWB and PCU PWB manufacturing No. data inconsistency

A0

15

Incompatible DSK BOOT and program firmware

20

Conflict firmware and EEPROM data version (MFP)

U2

11

MFPC PWB EEPROM counter check sum error

00

MFP EEPROM read/write error

E7

48

Scanner expansion PWB (ACRE) ASIC memory error

42

Image data trouble (Scanner expansion PWB (ACRE) ASIC)

96

MFPC PWB DIMM memory check error (MFPC PWB)

95

Printer PWB DIMM memory check error (PRINTER section)

U1

01

Battery trouble

E7

60

Combination error between PWB and firmware (MFPC PWB detection)

A0

04

Scanner expansion PWB (ACU) (ACRE) ROM error

(Power ON sequence)

H3, H4, H5

Saved in the PCU

U1

Saved in the MFP

U2

Saved in each block

U6-09

Saved in the PCU

F3-12, 22

Saved in the PCU

(Trouble cancel sequence)

When executing SIM 13, 14, 15, 16

H3, H4, H5, U1, U2, U6, F3 trouble check

SIM13: U1 trouble cancel
SIM14: H3, H4, H5 

(Color mode inhibition) cancel

SIM15: U6 trouble cancel, 

F3-12, F3-22 trouble cancel

SIM16: U2 trouble cancel

Each block

MFP event 
manager

Communication of trouble status
[Trouble code] [Trouble status]

Trouble cancel command

When the power is turned on, 
check is made in each block.

Trouble cancel status 
is communicated.

Trouble cancel 
(The trouble memory is 
initialized.)

sim task

Trouble check is preformed in each block, 
and the result is sent to the MFP.

MX-7500N  TROUBLESHOOTING  7 – 6

A0

01

PCU PWB ROM error

MFP

○

02

SCU PWB ROM error

MFP

○

04

Scanner expansion PWB (ACU) (ACRE) ROM error

MFP

○

10

Color profile error

MFP

○

15

Incompatible DSK BOOT and program firmware

MFP

○

17

Inconsistency between the UI data and the CPU firmware version

MFP

○

20

Conflict firmware and EEPROM data version (MFP)

MFP

○

21

Conflict firmware and EEPROM data version (PCU)

PCU

○

22

Conflict firmware and EEPROM data version (SCU)

SCU

○

C1

01

Charger cleaner trouble (K)

PCU

○

03

Charger cleaner trouble (C)

PCU

○

05

Charger cleaner trouble (M)

PCU

○

07

Charger cleaner trouble (Y)

PCU

○

10

Main charger trouble (Monochrome)

PCU

○

14

Main charger trouble (Color)

PCU

○

C4

00

PTC trouble

PCU

○

01

PTC (Pre Transfer Charger) cleaner trouble

PCU

○

20

Primary transfer output open trouble

Primary 
transfer

○

21

Primary transfer output short trouble

Primary 
transfer

○

30

Secondary transfer output open trouble

Secondary 
transfer

○

31

Secondary transfer output short trouble

Secondary 
transfer

○

E6

10

Shading error (Black correction)

SCU

○

11

Shading error (White correction)

SCU

○

14

CCD-ASIC error

SCU

○

E7

01

MFP image data error

MFP

○

02

HDD trouble when the mirroring kit is installed

MFP

○

03

HDD trouble (When the mirroring kit is not installed)

MFP

○

03

HDD trouble (When the mirroring kit is installed)

MFP

○

04

HDD-ASIC error

MFP

○

07

SD card error

MFP

○

10

Shading error (Black correction)

SCU

○

11

Shading error (White correction)

SCU

○

14

CCD-ASIC error

SCU

○

20

LSU laser detection and deterioration error (K)

PCU

○

21

LSU laser deterioration error (C)

PCU

○

22

LSU laser deterioration error (M)

PCU

○

23

LSU laser deterioration error (Y)

PCU

○

24

LSU LD driver trouble (K)

PCU

○

25

LSU LD driver trouble (C)

PCU

○

26

LSU LD driver trouble (M)

PCU

○

27

LSU LD driver trouble (Y)

PCU

○

28

LSU - PCU connection error

PCU

○

29

LSU ASIC frequency error

PCU

○

35

Communication trouble with the CIS-ASIC

PCU

○

36

CIS-ASIC black level detection abnormality

PCU

○

37

CIS-ASIC white level detection abnormality

PCU

○

42

Image data trouble (Scanner expansion PWB (ACRE) ASIC)

MFP

○

46

Image data decode error (Scanner expansion PWB (ACRE) ASIC)

MFP

○

47

Combination error between MFP and ACRE firmware (ACRE 
ASIC)

MFP

○

48

Scanner expansion PWB (ACRE) ASIC memory error

MFP

○

49

Water Mark data error

MFP

○

50

Combination error between PWB and firmware (PCU PWB detection)

PCU

○

55

PWB information sum error (engine detection)

PCU

○

60

Combination error between PWB and firmware (MFPC PWB detection)

MFP

○

61

Combination error between the MFPC PWB and the PCU PWB 
(MFPC PWB detection)

MFP

○

80

MFP - SCU PWB communication error

MFP

○