54
10 Troubleshooting
10.1. Troubleshooting -1 (when no error message is displayed on PC)
Symptom Possible Cause Check Point Remarks
LED does not light
up.
1. Power cord is not inserted cor-
rectly
Insert the power cord correctly.
2. Cables in the scanner are not
connected properly. (especially
around Power Supply)
Insert the cables properly.
3. FAN does not rotate. 1. Try to rotate the FAN, manually.
2. Check the power supply to the FAN.
3. Replace the FAN.
4. Power circuit (including a safety
circuit) does not work, properly.
Replace Power Supply.
5. Boot program of this scanner
does not work, correctly.
Replace CONTROL Board
6. DC ON/OFF circuit does not
work correctly.
1. Check the connection of the adaptor and its cable.
2. Monitor the following signals.
(1) Q17-G Typ. 12 V (when turning on the power)
(2) Q15-C Typ. 11 V (when turning on the power)
(3) Q16-B Typ. 0.6 V (when turning on the power)
(4) +7.0V Typ. 7V (when turning on the power)
3. Check the soldering condition of the following parts
and of their surrounding circuits on the CONTROL
Board. =>Q15,Q16,Q17
4. Monitor the following signals.
(1) Q15 (C-E): Typ. 0 V
(2) Q16 (C-E): Typ. 0 V
5. Replace faulty parts.
7. CONTROL Board does not work
properly.
1. Perform the "LED" test in Sec. Tes t (P. 47 ) to check the
LED ON/OFF status.
2. Check whether all connections (all connectors on the
CONTROL Board and cables to the CONTROL
Board) are normal.
3. Check the soldering condition of the following parts
and of their surrounding circuits on the CONTROL
Board.
(1) VDD10 Typ. 1.02V
(2) VDDR2 Typ. 1.8V
(3) +3.3V Typ. 3.3V
(4) +3.3V_FUSE Typ. 3.3V
(5) IC4 (SoC)
(6) IC6 (Reset IC)
4. Check the soldering condition of the following parts
on the CONTROL Board.
(1) CN3
5. Monitor the following signals on the CN3.
(1) CN3-8pin:+3.3V
6. Replace faulty parts or CONTROL Board.
8. PANEL Board does not work
properly.
For S1057C, S1027C
1. Perform the "LED" test in Sec. Tes t (P. 47 ) to check the
LED ON/OFF status.
2. Check the following connection.
(1) between CN4000(LCD Panel Board) and CN3
(CONTROL Board)
3. Check the soldering condition of the following parts on
the PANEL Board.
(1) CN4000
(2) IC400
4. Monitor the following signals on the CN4000.
(1) CN4000-3pin:+3.3V
5. Replace faulty parts or PANEL Board.
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