71
MEP-7000
5
6
7
8
5
6
7
8
A
B
C
D
E
F
Only communication with the PC not possible
Check the USBP
W
2# and
USBOC2# signals from the USB
HUB (IC403) to the HIGHT SIDE
S
W
(IC404).
If the USBP
W
1# signal does not become L,
check the mounting status of the USB HUB IC
(IC404). If it is properly mounted, the port
connector may be defective; replace it.
If the USBOC1# signal does not become H,
check the mounting status of the USB HUB IC
(IC404).If it is properly mounted, the port
connector may be defective; replace it.
-
-
2
SMAI
N
ASSY
See “5.2 CO
N
FIRMATIO
N
OF
COMMU
N
ICATIO
N
W
ITH THE
PC VIA USB.”
Check if the name of the corre-
sponding driver is displayed in
the Device Manager window of
the PC. You can use utility
software for version display to
check if communication is
established.
If the driver has not been recognized, go to [2].
For details on the utility software for version
display, see “5.2 CO
N
FIRMATIO
N
OF
COMMU
N
ICATIO
N
W
ITH THE PC VIA USB.”
-
1
PC
Check the input voltage (V+5D)
and output voltage (V+5USB2D)
to/from the HIGHT SIDE S
W
(IC404).
If there is the input voltage (V+5D) but not
output voltage (V+5USB2D), check the
mounting status of the HIGHT SIDE S
W
(IC404). If it is properly mounted, it may be
defective; replace it.
If V+5USB2D is output, go to [4].
-
-
3
SMAI
N
ASSY
1
CABLE
If a connection is loose, firmly connect the
cables.
If there is breakage, replace the Cables.
4
SMAI
N
ASSY
If the problem is not resolved
even after the above-mentioned
measures are taken.
-
2
CABLE
If a connection is loose, firmly connect the
cables.
If there is breakage, replace the Cables.
-
4
SMAI
N
ASSY
If the problem is not resolved
even after the above-mentioned
measures are taken.
-
3
SJACK ASSY
Check the connections between
the USB connector (JA16) and
USB controller (IC402) on the
SJACK Assy.
If there is a poor connection, resolder ICs.
Only communication via USB2 (front) port not possible
Check if the cables that connect
the SMAI
N
and SJACK Assys
are securely connected and if
there is breakage in the cables.
Check if the cables that connect
the SMAI
N
and SJACK Assys
are securely connected and if
there is breakage in the cables.
Check the connections of the communication
lines of the USB USB HUB IC (IC403).If it is
properly connected, the port connector may be
defective; replace it.
Check the mounting status of the USB
CO
N
TROLLER (IC402). If it is properly
mounted, the port connector may be defective;
replace it.