Oki C5500 Maintenance Manual page 193

Confirmation Items
(3-2-3) Check of operating state of motors
Feed motor
Feed motor driver
(3-2-4) Check of connections
Feed motor drive cord
Feed motor drive cord
Feed motor
(3-2-5) Check of operating state of solenoid
Feed solenoid
Feed solenoid
(3-2-6) Check of connections
Feed solenoid cord
Feed solenoid cord
43085101TH Rev.1
Confirmation Tasks
Conduct the Motor and Clutch Test of the self-diagnostic mode,
and check to see if the feed motor operates normally.
Unplug the HOP connector of the PU PCB (PRX PCB), and
confirm the following on the connector side:
Several Mohms between pin 1 and FG
Several Mohms between pin 2 and FG
Several Mohms between pin 3 and FG
Several Mohms between pin 4 and FG
Check the connected state of the cord.
Check for incomplete connection or skew insertion, and check
the cord visually to see if it has any assembling problem.
Check to make sure that the cord is not caught under any
assembled part of the printer. Unplug the HOP connector of the
PU PCB (PRX PCB), and confirm the following on the cord side:
Short-circuiting between pin 1 and FG
Short-circuiting between pin 2 and FG
Short-circuiting between pin 3 and FG
Short-circuiting between pin 4 and FG
Confirm 3.5‰ of resistance is seen between 5pin-6pin,and 7pin-
8pin each at the cord side after pulling out HOPKID connector of
the PU board (PRN PCB).
Conduct the Motor and Clutch Test of the self-diagnostic mode,
and check to see if the feed solenoid operates normally.
Make this checking with the right side plate detached, so that
the solenoid is visible.
Check to see if there is anything that interferes with the moving
part of the solenoid (cord, etc.).
Check the connected state of the cord.
Check for any incomplete connection or skew insertion, and
check the cord visually if it has any assembling problem.
Check to make sure that the cord is not caught under any
assembled part of the printer.
Unplug the HSOL connector of the PU PCB (PRX PCB), and
confirm the following on the cord side:
Short-circuiting between pin 1 and FG
Unplug the HSOL connector, and check to see if there is a
resistance of approximately 89 ‰ between pin 1 and pin 2.
Oki Data CONFIDENTIAL
Action at NG
Replace the PU PCB
(PRX PCB) or feed
motor.
Replace the PU PCB
(PRX PCB).
Redo the connection
properly.
Replace the cord with a
normal one.
Replace the cord, and
correct the assembling
to make it normal.
Replace the feed
motor.
Replace the PU PCB
(PRX PCB) or feed
solenoid.
Correct the assembling
of the printer to make it
normal.
Correct the connection
properly.
Replace the cord with
a normal one.
Replace the solenoid
Assy, and redo the
reassembling properly.
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