Read Panasonic KV-S8147-M / KV-S8127-M / KV-S8150 / KV-S8130 / KV-S8120 Service Manual Supplement online
14
KV-S8147/KV-S8127/KV-S8150/KV-S8130/KV-S8120
1.5.
Troubleshooting
1.5.1.
Troubleshooting-1 (with no error message on PC)
Changed from the Original Service Manual section 11.1. (P.100 and 101)
Symptom
Possible Cause
Recommended action
Remarks
No power
1. Power cord is not inserted correctly
Insert the power cord correctly.
2. Cables in the scanner are not
connected properly.
(especially around POWER Board)
(especially around POWER Board)
Check the connection between Power Boards
and Drive Board (CN2004, CN2001,
CN2002).
and Drive Board (CN2004, CN2001,
CN2002).
Pay attention
when reassem-
bling the scan-
ner.
when reassem-
bling the scan-
ner.
3. Board or connection failure.
1. Check the connections between follows.
a. POWER Board to Harness connected
to the CN2001, CN2002 (DRIVE Board)
b. SUB POWER Board to Harness con-
nected to the CN2004 (DRIVE Board,
Includes a relay connector)
Includes a relay connector)
c. Harness between POWER Board and
SUB POWER Board.
d. Harness between AC inlet and SUB
POWER Board.
2. Check output voltages of DRIVE Board.
a. CN2001-1st pin : 12V.
b. CN2001-4, 5, 7th pin : 24V.
c. CN2002-1st pin : 12V.
d. CN2002-4, 5, 7th pin : 24V.
e. CN2004-1, 2, 5, 6th pin : 12V.
b. CN2001-4, 5, 7th pin : 24V.
c. CN2002-1st pin : 12V.
d. CN2002-4, 5, 7th pin : 24V.
e. CN2004-1, 2, 5, 6th pin : 12V.
3. Replace POWER Board, SUB POWER
Board or DRIVE Board.
4. Cable of Panel board is not connected
properly.
Check the cable between CN4000 ( PANEL
Board) and CN16 (CONTROL Board.)
Board) and CN16 (CONTROL Board.)
5. No image or only hourglass image on
LCD.
Check the cable connections between
JK4500, CN4501 (LCD Board) and JK5,
CN17 (CONTROL Board).
JK4500, CN4501 (LCD Board) and JK5,
CN17 (CONTROL Board).
6. Voltage monitoring error due to the fail-
ure of the DCDC circuit.
1. Try to replace Drive board or CONTROL
Board.
2. If it is recovered by changing the board,
check the DCDC output voltages and fuse
of the board.
of the board.
Scanner does not
recognize USB
connection.
recognize USB
connection.
1. USB cable is not connected properly.
1. Check the device (USB) condition of PC
with Device Manager
2. Reconnect the USB cable, and then restart
the scanner and PC
3. Replace the USB cable.
4. Check if the USB connector (JK1) has any
4. Check if the USB connector (JK1) has any
damage.
2. USB interface circuit does not work.
1. Check the soldering of the following parts
and the peripheral circuits on the
CONTROL Board.
a. JK1 (USB I/F connector)
b. LF3, LF5 (Common mode filter)
c. IC8 (Common mode filter)
CONTROL Board.
a. JK1 (USB I/F connector)
b. LF3, LF5 (Common mode filter)
c. IC8 (Common mode filter)
2. Replace the CONTROL Board.
Scanned Image
Problems
(ex: black line or band
white line or band or
faded image)
Problems
(ex: black line or band
white line or band or
faded image)
1. Dust on the CIS (F) or CIS (B)
Clean the glass surface.
2. Paper dust or carbon dust on the roller
or conveyor.
Clean the roller and the conveyor.
3. CIS (F) or CIS (B) has any problem.
1. Execute "Focus" in Sec.
10.3.7.
to check
the CIS condition.
2. Check the cable between CIS, Relay Board
and CONTROL Board.
3. Replace the CIS (F) or CIS (B).
4. Replace RELAY Board or CONTROL
4. Replace RELAY Board or CONTROL
Board.
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