Sharp MX-DEX6 Service Manual ▷ View online
MX-DEX6/DEX7 SELF-DIAGNOSIS AND TROUBLE CODES 9 – 2
<Button Description>
2. Self-diagnosis
When a trouble condition occurs in the machine or when there is a
consumable part whose life is nearly or already expired, the
machine's self-diagnosis program detects and analyzes the condi-
tion and issues the appropriate notification on the display panel so
that the user and the serviceperson can take the suitable action. In
the case of a trouble condition (rather than the expiration of a part's
life), the self-diagnosis program not only issues the appropriate
notification but also stops the machine to minimize damage.
consumable part whose life is nearly or already expired, the
machine's self-diagnosis program detects and analyzes the condi-
tion and issues the appropriate notification on the display panel so
that the user and the serviceperson can take the suitable action. In
the case of a trouble condition (rather than the expiration of a part's
life), the self-diagnosis program not only issues the appropriate
notification but also stops the machine to minimize damage.
A. Functions and Objectives
1) Ensures safety by stopping the machine as soon as a trouble
condition is detected.
2) Minimizes damage to the machine by stopping the machine as
soon as a trouble condition is detected.
3) Displays the description of the trouble condition so that the
user or serviceperson can quickly and accurately identify the
source of the trouble. This helps the serviceperson to perform
repair work most effectively and efficiently.
source of the trouble. This helps the serviceperson to perform
repair work most effectively and efficiently.
4) Issues an alarm when there is a consumable part whose life is
nearly expired so that the user can order the consumable part
before its life is actually expired. This helps prevent machine
outage due to the absence of a consumable part.
before its life is actually expired. This helps prevent machine
outage due to the absence of a consumable part.
B. Types of Self-diagnosis Messages
Self-diagnosis messages can be classified into the following types:
C. How Self-diagnosis Works
(1) Self-diagnosis and Troubleshooting Workflow
The self-diagnosis program built in the machine is always the mon-
itoring machine function.
When the self-diagnosis program detects a trouble condition, it
stops the machine and displays the appropriate trouble message.
Typically, warning messages are displayed when there is a con-
sumable part whose life is nearly or already expired.
Some warning messages are displayed without machine stoppage,
while other warning messages are displayed at the same time as
machine stoppage.
Trouble and warning messages are displayed on the LCD with one
or more specific indicator lamps lit or flashing.
Some trouble messages are automatically cleared upon recovery
from the trouble, while other trouble messages must be cleared
using the corresponding SIM.
Also, some of warning messages associated with consumable
parts are automatically cleared upon replacement or refill of the
consumable part, while other messages must be cleared using the
corresponding SIM.
itoring machine function.
When the self-diagnosis program detects a trouble condition, it
stops the machine and displays the appropriate trouble message.
Typically, warning messages are displayed when there is a con-
sumable part whose life is nearly or already expired.
Some warning messages are displayed without machine stoppage,
while other warning messages are displayed at the same time as
machine stoppage.
Trouble and warning messages are displayed on the LCD with one
or more specific indicator lamps lit or flashing.
Some trouble messages are automatically cleared upon recovery
from the trouble, while other trouble messages must be cleared
using the corresponding SIM.
Also, some of warning messages associated with consumable
parts are automatically cleared upon replacement or refill of the
consumable part, while other messages must be cleared using the
corresponding SIM.
Button
Description
DTRC
Desk transport clutch
Classification
1
1
User
This type includes user-recoverable
trouble or warning conditions (such as
paper jam or consumable part life
expiration).
trouble or warning conditions (such as
paper jam or consumable part life
expiration).
Service
This type includes serviceperson-
recoverable trouble or warning
conditions (such as motor trouble or
maintenance).
recoverable trouble or warning
conditions (such as motor trouble or
maintenance).
Miscellaneous
—
Classification
2
2
Warning
This type includes those messages that
are primarily intended to warn the user
and not directly related with machine
trouble (such as a warning message
issued when there is a consumable part
whose life is nearly expired).
are primarily intended to warn the user
and not directly related with machine
trouble (such as a warning message
issued when there is a consumable part
whose life is nearly expired).
Trouble
This type includes those messages that
are directly related with machine trouble
and issued at the same time as machine
stoppage.
are directly related with machine trouble
and issued at the same time as machine
stoppage.
Miscellaneous
—
Repair
Monitor machine function
Detect and analyze trouble
Trouble/warning
Trouble/warning
Stop the machine
Identify the cause
Cancel self-diagnosis
message using "diag"
(test command), etc.
Standby
Consumable part
life expired?
Replace or refill the
consumable part
Recovery
Display the trouble
description
Trouble
Trouble
Warning
Warning
YES
NO
MX-DEX6/DEX7 SELF-DIAGNOSIS AND TROUBLE CODES 9 – 3
3. Trouble Code List
4. Trouble Code Details
U6-00
Desk communication trouble
U6-01
Desk tray 1 lift-up motor trouble
U6-02
Desk tray 2 lift-up motor trouble
U6-10
Desk transport motor trouble
U6-50
Desk incompatibility trouble
Main
code
code
Sub
code
Description
Section
Can occur when
Solution
Remarks
U6
00
Desk communication trouble
Desk
Desk communication is made.
Turn OFF and back ON the power.
01
Desk tray 1 lift-up motor trouble
Desk
Tray is being lifted.
Check connections, etc.
02
Desk tray 2 lift-up motor trouble
Desk
Tray is being lifted.
Check connections, etc.
10
Desk transport motor trouble
Desk
Paper is fed.
Check connections, etc.
50
Desk incompatibility trouble
Desk
The power is turned ON.
Check connections, etc.
Content
Desk communication trouble
Description
Communication error with the desk; communication line test
error after turning on the power or canceling an exclusive
SIM.
error after turning on the power or canceling an exclusive
SIM.
Case 1
Cause
Defective connection or disconnection of
connector and harness
connector and harness
Check and
Remedy
Remedy
Check the connector and the harness in the
communication line. Connect the connector
properly.
Replace the harness.
communication line. Connect the connector
properly.
Replace the harness.
Case 2
Cause
Desk control PWB failure
Control PWB (PCU) failure
Control PWB (PCU) failure
Check and
Remedy
Remedy
Replace the desk control PWB. Replace the
control PWB (PCU).
control PWB (PCU).
Case 3
Cause
Malfunction caused by electrical noise
Check and
Remedy
Remedy
Cancel by turning OFF/ON the power.
Content
Desk tray 1 lift-up motor trouble
Description
Desk tray 1 lift-up operation failure
Case 1
Cause
Defective connection or disconnection of
connector and harness
connector and harness
Check and
Remedy
Remedy
Check the connectors and the harnesses of
the desk control PWB, lift motor line, and paper
feed unit line.
Connect the connector properly. Replace the
harness.
the desk control PWB, lift motor line, and paper
feed unit line.
Connect the connector properly. Replace the
harness.
Case 2
Cause
Motor lock, motor rpm abnormality, motor
overcurrent, intrusion of foreign material
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Use SIM 4-3 to select DLUM1 and check the
operation of the single unit. Check for intrusion
of any foreign material in the drive system.
operation of the single unit. Check for intrusion
of any foreign material in the drive system.
Case 3
Cause
Desk control PWB failure, desk tray 1 lift motor
failure, DLUD1 sensor failure.
failure, DLUD1 sensor failure.
Check and
Remedy
Remedy
Replace the desk control PWB, desk tray 1 lift
motor, or DLUD1 sensor.
motor, or DLUD1 sensor.
Content
Desk tray 2 lift-up motor trouble
Description
Desk tray 2 lift-up operation failure
Case 1
Cause
Defective connection or disconnection of
connector and harness
connector and harness
Check and
Remedy
Remedy
Check the connectors and the harnesses of
the desk control PWB, lift motor line, and
paper feed unit line.
Connect the connector properly. Replace the
harness.
the desk control PWB, lift motor line, and
paper feed unit line.
Connect the connector properly. Replace the
harness.
Case 2
Cause
Motor lock, motor rpm abnormality, motor
overcurrent, intrusion of foreign material
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Use SIM 4-3 to select DLUM2 and check the
operation of the single unit. Check for
intrusion of any foreign material in the drive
system.
operation of the single unit. Check for
intrusion of any foreign material in the drive
system.
Case 3
Cause
Desk control PWB failure, desk tray 2 lift motor
failure, DLUD2 sensor failure
failure, DLUD2 sensor failure
Check and
Remedy
Remedy
Replace the desk control PWB, desk tray 2 lift
motor, or DLUD2 sensor.
motor, or DLUD2 sensor.
Content
Desk transport motor trouble
Description
Desk transport motor operation failure
Case 1
Cause
Defective connection or disconnection of
connector and harness
connector and harness
Check and
Remedy
Remedy
Check the connector and the harness in the
motor line.
Connect the connector properly. Replace the
harness.
motor line.
Connect the connector properly. Replace the
harness.
Case 2
Cause
Motor lock, motor rpm abnormality, motor
overcurrent, intrusion of foreign material
overcurrent, intrusion of foreign material
Check and
Remedy
Remedy
Use SIM 4-3 to select DPFM and check the
operation of the single unit. Check for
intrusion of any foreign material in the drive
system.
operation of the single unit. Check for
intrusion of any foreign material in the drive
system.
Case 3
Cause
Desk control PWB failure, transport motor
failure
failure
Check and
Remedy
Remedy
Replace the desk control PWB or the transport
motor.
motor.
Content
Desk incompatibility trouble
Description
User attempted to connect a desk incompatible with MX-
DEX6/DEX7.
DEX6/DEX7.
Case 1
Cause
User attempted to connect an MX-DEX6/
DEX7-incompatible desk such as MX-DEX3/
DEX4.
DEX7-incompatible desk such as MX-DEX3/
DEX4.
Check and
Remedy
Remedy
Connect MX-DEX6/DEX7.
MX-DEX6/DEX7 ELECTRICAL SECTION 10 – 1
MXDEX7
Service Manual
[10] ELECTRICAL SECTION
1. Electronic/Mechanical Parts Relationship Diagram
PLS-PWB1
DPFM
PLS-PWB2
DCSPD2
DCSPD1
DSW_DSK
DLUD1
DPED1
DLUD2
DPED2
DPFD1
DTRC
DPUC1
DLUM1
DLUM2
DPUC2
DPFD2
DESK CONTROL
PWB
PWB
1
2
3
4
5
DCSS14
DCSS13
DCSS12
DCSS11
GND
DCSI1
4
5
5
1
2
2
6
3
DCSS14
DCSS12
DCSS13
DCSS13
GND
DCSS11
DCSS11
DCSI1
CN-J
CN-I
CN-H
CN-G
CN-E
CN-D
1
DLUM1
2
GND
/DPFM-CLK
DPFM-T
/DPFM-EN
GND
+24V
DPFM-T
/DPFM-EN
GND
+24V
DPFM-T
/DTRC
+24V
+24V_CL
/DPFM-CLK
/DPFM-EN
4
3
2
1
3
2
1
3
7
4
9
5
6
6
8
GND
1
11
8
4
3
2
GND
GND
7
9
5
+5V
DLUM1
GND
6
1
DLUM2
2
DPED2
3
+5V
DLUD2
3
2
2
GND
+5V
GND
3
2
+5V
DCSPD2
2
1
1
GND
+5V
DPFD2
1
GND
1
GND
1
2
2
+24V_CL
+24V_CL
10
DLUM2
DCSPD1
1
GND
2
+5V
3
+5V
2
GND
3
2
2
PHNR-3-H
DLUD1
DPFD1
2
1
GND
GND
+5V
DPED1
1
3
+5V
1
3
2
1
4
3
PHNR-12-H
4
2
1
3
6
8
5
7
6
5
5
8
7
7
10
11
11
9
12
12
11
11
9
10
BU12P-TR-P-H
7
5
1
6
3
6
8
5
7
8
BU09P-TR-P-H
2
4
PHNR-09-H
3
4
1
2
9
2
BU02P-TR-P-H
1
PHNR-02-H
2
1
2
BU02P-TR-P-H
PHNR-02-H
2
1
1
1
06KR-6H-P
2
1
1
6
5
4
5
4
7
3
+5V
DPED1
DPED1
+5V
GND
GND
DLUD1
GND
GND
+5V
+5V
GND
GND
GND
+5V
GND
DLUD2
+5V
+5V
DPED2
GND
DCSPD2
+5V
DCSPD2
+5V
GND
DPWD22
DPWD21
+5V
2
1
12
8
10
6
5
9
11
4
7
3
02CK-6H-P
02CK-6H-P
05CK-6H-P
02CK-6H-P
02CK-6H-P
03CK-6H-P
1
3
2
B9B-PH-K-S
B7B-PH-K-S
B12B-PH-K-S
B4B-PH-K-S
B3B-PH-K-S
B11B-PH-K-S
09CK-6H-P
9
PHNR-3-H
PHNR-3-H
1
2
+5V
GND
DSW_DSK
3
PHNR-3-H
PHNR-3-H
PHNR-3-H
PHNR-3-H
/DPUC1
/DPUC2
DCSPD1
DPFD1
DSW_DSK
DPFD2
2
BU02P-TR-P-H
1
PHNR-02-H
2
1
02CK-6H-P
12CK-6H-P
CN-B
4
3
2
1
3
2
1
6
5
5
B6B-PH-K-S
DCSS24
DCSS23
DCSS22
DCSS21
GND
DCSI2
4
5
5
1
2
2
6
3
DCSS24
DCSS22
DCSS23
DCSS23
GND
DCSS21
DCSS21
DCSI2
N.C.
06KR-6H-P
CN-C
4
3
2
1
3
2
1
6
7
5
B7B-PH-K-S
MX-DEX6/DEX7 ELECTRICAL SECTION 10 – 2
2. Block Diagram
MX-DEX6/DEX7
MX-2600/3100
DPFM
DTRC
DESK
CONTROL
PWB
CPU
(H8/3684HV)
DCSI2
DPUC2
DCSS13
DCSS14
DCSS12
DCSI1
DCSS11
DPUC1
DLUM2
DLUM1
DCSS23
DCSS22
DCSS21
DCSS24
DCSPD1
DCSPD2
DSW_DSK
DPFD1
DPED1
DLUD1
DPFD2
DPED2
DLUD2
GND
GND
+24V
+24V
+24V
+24V
+24V
+24V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
+5V
Desk
1
paper
level
sensor
Desk
2
attachment
sensor
Desk
1
rear
edge
switch
4
Desk
main
motor
Desk
transport
clutch
Desk
1
paper
feed
clutch
Desk
2
paper
feed
clutch
Desk
lift-up
motor
Desk
1
rear
edge
switch
1
Desk
1
attachment
sensor
Desk
1
rear
edge
switch
2
Desk
1
rear
edge
switch
3
Desk
2
rear
edge
switch
1
Desk
2
rear
edge
switch
2
Desk
2
rear
edge
switch
3
Desk
2
rear
edge
switch
4
Desk
2
paper
level
sensor
Right
door
open/close
sensor
Desk
1
transport
sensor
Desk
1
paper
presence
sensor
Desk
1
upper
limit
sensor
Desk
2
transport
sensor
Desk
2
paper
presence
sensor
Desk
2
upper
limit
sensor
/DPFM-CLK
/DPFM-EN
DPFM-T
Desk
1
Size
detection
PWB
unit
Output
buffer
Transistor
array
(TD62003AP)
Desk
2
Size
detection
PWB
unit
Lift
motor
drive
circuit
Lift
motor
drive
circuit
Sensor
input
circuit
Xtal(7.37MHz)
Output
buffer
Input
buffer
Output
buffer
Input
buffer
Input
buffer
Input
buffer
On-board
write
circuit
+5V
+24V
3
DH
heater
/RXD-DSK
/TXD-DSK
/DSR-DSK
/DTR-DSK
RES-DSK
/TRC-DSK
AC
L
AC
N
Ground
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