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KV-N1058X KV-N1028X KV-N1058Y KV-N1028Y
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127
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Service Manual
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Device
Service Manual / Other / DOCUMENT SCANNER
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kv-n1058x-kv-n1028x-kv-n1058y-kv-n1028y.pdf
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65
4. Problem with Pixel data from 
CIS (F) or from image 
processing circuit.
*KV-N1028Y/X: CN2
**KV-N1028Y/X : IC2
1. Check the connection and soldering condition of 
the following parts.
Between CIS (F) and CN1*(CONTROL Board)
2. Check the soldering condition of the following parts 
and of their surrounding circuits on the CONTROL 
Board.
(1) IC9 (PF4)
(2) IC1** (AFE)
(3) IC4 (D/A Conv.)
3. Monitor the following CIS Timing signals on the 
CN1*.
(1) FCLK (CN1*-5th pin)  : See 
Fig.11.2.1.
(2) FSP (CN1*-7th pin)    : See 
Fig.11.2.2.
4. Replace faulty parts or boards.
F61: Front-side 
black level error
51
00
00
00 1. Problem with Pixel data from 
CIS (F) or from image 
processing circuit.
Refer to F60 - 4.
F62: Back-side 
gain adjustment 
error
52
00
00
00 1. The surface of Scanning 
Glass (B) is dirty.
1. Clean the surface with a soft and dry cloth.
2. CIS (B) Unit does not work 
properly.
*KV-N1028Y/X : CN4
1. Execute "Focus" test in Sec. 
10.3.8.
 to check the 
waveform of CIS output.
2. Execute "CIS LED" test in Sec. 
10.3.8.
 to check the 
lighting of each RGB.
3. Check the following connections and soldering 
condition on each connector.
CIS (B) Unit to CN3* (CONTROL Board)
4. Check the power supply for LED.
(1) CN3*-4th pin, F1: 7.0 V
(2) L8, L9, L10, Q9, Q10, Q12
5. Replace faulty parts or boards. 
3. Background Plate (B) 
switching is not working 
properly.
1. Execute "Focus" test in Sec. 
10.3.8.
 to check the 
peak level when Background Color is White and 
Black.
4. Problem with Pixel data from 
CIS (B) or from image 
processing circuit.
*KV-N1028Y/X : CN4
1. Check the connection and soldering condition of 
the following parts.
Between CIS (B) and CN3* (CONTROL Board)
2. Check the soldering condition of the following parts 
and of their surrounding circuits on the CONTROL 
Board.
(1) IC9 (PF4)
(2) IC2 (AFE)
(3) IC4 (D/A Conv.)
3. Monitor the following CIS Timing signals on the 
CN3*.
(1) BCLK (CN3*-5th pin)  : See 
Fig.11.2.1.
(2) BSP (CN3*-7th pin)    : See 
Fig.11.2.2.
4. Replace faulty parts or boards.
F63: Back-side 
black level error 
53
00
00
00 1. Problem with Pixel data from 
CIS (B) or from image
processing circuit.
Refer to F62 - 4.
F80: Double
Feed Detector
error
60
00
00
00 1. Double Feed Detector
(Generate) does not work
properly.
Refer to U23 - 5.
2. Double Feed Detector
(Receive) does not work
properly.
Refer to U23 - 6.
F82: DAC 
control status 
error
63
00
00
00 1. No reply from DAC IC.
1. Check the soldering condition of CONTROL Board 
and its surrounding parts of IC4.
2. Replace faulty parts or boards.
F90: Sub-
processor error
9E
XX
XX
XX 1. Sub-processor error of 
ASIC.
1. Check the soldering condition of CONTROL Board 
and its surrounding parts of IC9.
2. Replace faulty parts or boards.
Error Code
ST1 ST2 ST3 ST4
Possible Cause
Recommended action
66
Fig.11.2.1.
Fig.11.2.2.
Fig.11.2.3.
CN1-5 Pixel Clock
KV-
11058;
CN2-5 Pixel Clock
KV-
11028;
CN1-7 SP (Start Pulse)
KV- 1058 Y
CN2-7 Pixel Clock
KV- 1028 Y
CN12-1 Motor 
OUT
Note: Frequency depends on each mode
67
Fig.11.2.4.
Fig.11.2.5.
CN15-2 US OUT
CN14-1 US-AMP OUT
68
11.3. Network Troubleshooting (Wired LAN)
Note: This procedure is an example. Depending on the actual use environment, situation, etc., it may not follow the 
procedure.
START
Is it wired LAN mode?
Is the IP filter set?
Are the LEDs lighted?
Check the DHCP server setting. 
Contact your network administrator. 
Disable AUTO IP setting. 
Check the allocation status of the 
IP address and subnet mask on 
the scanner. 
    Are "0.0.0.0" 
or "169.254. *. *" 
     displayed?
Correct the IP filter setting. 
Check the status of the DHCP server. 
Contact your network administrator.
Replace the Control board.
Is IP setting correct?
Some devices have the same 
IP address. Contact your network 
administrator. 
Correct the IP setting. 
Contact your network administrator. 
Check the IP setting (IP address 
/subnet mask / gateway) of the 
scanner.
Check the status of the DHCP 
server. Contact your network 
administrator.
Check LAN cable, router and hub 
for abnormality.
Change the device setting to wired 
LAN mode and power off and then 
on again.
When connecting the LAN cable, 
check whether the Link / Rx LEDs 
are lighted or blinked.
Check the wired LAN mode of the 
device settings. 
Is the DHCP server 
working properly?
  Is the IP address 
allocation method 
        DHCP?
       Is there any 
problem in cables and 
          routers?
Connect the scanner and the 
service PC directly using a cross 
cable. (Resetting of IP address is 
necessary)
Check the scanner setting (IP 
address / MAC address) with 
"ARP-a" command and NW 
setting tool.
           Is there any 
response with the "PING" 
            command? 
           Is there any 
response with the "PING" 
            command? 
      Are the MAC 
addresses the same?
Check the LAN function of the PC. 
Check the state of the router and 
hub. Contact your network 
administrator.
Replace the control board.
No
Yes
Change LAN cable. 
Turn the router and hub power off 
and then on again. 
Change the router and the hub.
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