Canon NP6251 Service Manual page 792

Code
• Holding tray Y home position sensor
(PS20; fault)
• Holding tray Y motor (M9; fault)
• DC controller PCB (fault)
E051
(E202)
• Scanner motor (M3; fault)
• Scanner home position sensor
No code
(PS1; faulty)
indication;
• DC controller PCB (fault)
keys locked.
• Scanner motor (M3; fault)
• Scanner home position (PS1; fault)
• DC controller PCB (fault)
E203
• Scanner motor (M3; fault)
• Scanner original leading edge
(E204)
sensor (PS3, PS4; fault)
• DC controller PCB (fault)
No code
indication
keys locked
• Lens X home position sensor (PS6;
fault)
• Lens X motor (M4; fault)
E210
• DC controller PCB (fault)
• Lens Y home position sensor (PS7;
fault)
• Lens Y motor (M5; fault)
E212
• DC controller PCB (fault)
COPYRIGHT © 1997 CANON INC.
Cause
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
Description
• While the holding tray Y motor (M9)
drive signal is being generated, the
holding tray Y home position signal
(HTYHP) is not generated within 4
sec.
• While the holding tray Y motor (M9)
drive signal is being generated, the
holding tray Y home position signal
(HTYHP) is generated for 2 sec or
more.
• The scanner home position signal
(SCHP) is not generated within 10
sec after the power switch or the
Copy Start key has been turned ON.
• The scanner motor clock pulse
signal (SCMCLK) is not generated
even though the scanner motor is
rotating.
• While the scanner motor (M3) drive
signal is being generated, the scan-
ner home position signal (SCHP) is
generated for 0.5 sec or more.
• The scanner leading edge signal
(SCDP1) is not generated within 0.8
sec after the scanner has started to
move forward.
• The scanner leading edge signal
(SCDP2) is not generated within 1.0
sec after the scanner has started to
move forward.
• The lens X home position signal
(LXHP) is not generated within 9
sec after the power switch or the
Copy Start key is turned on.
• The lens X home position signal
(LXHP) is generated for 2 sec or
more.
• The lens Y home position signal
(LYHP) is not generated within 9
sec after the power-switch or the
Copy Start key is turned on.
• The lens Y home position signal
(LYHP) is generated for 2 sec or
more.
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