Troubleshooting; Troubleshooting -1 (When No Error Message Is Displayed On Pc) - Panasonic KV-S1057C Service Manual

10 Troubleshooting

10.1. Troubleshooting -1 (when no error message is displayed on PC)

Symptom
LED does not light 1. Power cord is not inserted cor-
up. rectly
2. Cables in the scanner are not
connected properly. (especially
around Power Supply)
3. FAN does not rotate.
4. Power circuit (including a safety
circuit) does not work, properly.
5. Boot program of this scanner
does not work, correctly.
6. DC ON/OFF circuit does not
work correctly.
7. CONTROL Board does not work
properly.
8. PANEL Board does not work
properly.
For S1057C, S1027C
Possible Cause Check Point
Insert the power cord correctly.
Insert the cables properly.
1. Try to rotate the FAN, manually.
2. Check the power supply to the FAN.
3. Replace the FAN.
Replace Power Supply.
Replace CONTROL Board
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.
Perform the "LED" test in Sec.
1.
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.
Perform the "LED" test in Sec.
1.
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.
54
Remarks
( ) to check the
Test P.47
( ) to check the
Test P.47