Service manual
Table Of Contents
- COVER
- CAUTION
- Safety precautions
- CONTENTS
- 1-1 Specifications
- 1-2 Handling Precautions
- 1-3 Installation
- 1-4 Maintenance mode
- 1-5 Trouble Shooting
- 1-5-1 Paper misfeed detection
- 1-5-2 Self-diagnosis
- 1-5-3 Image formation problems
- (1) No image appears (entirely white).
- (2) No image appears (entirely black).
- (3) Image is too light.
- (4) Background is visible.
- (5) A white line appears longitudinally.
- (6) A black line appears longitudinally.
- (7) A black line appears laterally.
- (8) One side of the copy image is darker than the other.
- (9) Black dots appear on the image.
- (10)Image is blurred.
- (11)The leading edge of the image is consistently misaligned with the original.
- (12)The leading edge of the image is sporadically misaligned with the original.
- (13)Paper creases.
- (14)Offset occurs.
- (15)Image is partly missing.
- (16)Fixing is poor.
- (17)Image is out of focus.
- (18)Image center does not align with the original center.
- (19)Image is not square.
- (20)Image contrast is low (carrier scattering).
- 1-5-4 Electrical problems
- (1) The machine does not operate when the main switch is turned on
- (2) The drive motor does not operate when (C200)
- (3) The scanner motor does not operate.
- (4) The toner feed motor does not operate
- (5) Cooling fan motor 1 does not operate
- (6) Cooling fan motor 2 does not operate
- (7) Cooling fan motor 3 does not operate
- (8) The drawer motor does not operate
- (9) The registration clutch does not operate
- (10) The upper paper feed clutch does not operate
- (11) The lower paper clutch does not operate
- (12) Paper feed clutch (ST) 1 does not operate
- (13) Paper feed clutch (ST) 2 does not operate
- (14) The bypass paper feed clutch does not operate
- (15) The cleaning lamp does not turn on
- (16) The exposure lamp does not turn on
- (17) The exposure lamp does not turn off
- (18) The fixing heater does not turn on (C610)
- (19) The fixing heater does not turn off
- (20) Main charging is not performed
- (21) Transfer charging is not performed
- (22) No developing bias is output
- (23) The original size is not detected
- (24) The original size is not detected correctly
- (25) The message requesting papaer to be loaded is shown when paper is present
- (26) The message requesting papaer to be loaded is shown when paper is present in the upper drawer
- (27) The message requesting papaer to be loaded is shown when paper is present in the lower drawer
- (28) The size of paper in the upper drawer is not displayed correctly
- (28) The size of paper in the upper drawer is not displayed correctly
- (29) The size of paper in the lower drawer is not displayed correctly
- (30) The printing width of the paper on the bypass is not detected correctly
- (31) A paper jam in the paper feed, paper conveying or fixing section is indicated when the main switch is turned on
- (32) The message requesting covers to be closed is displayed when the front cover, paper conveying unit and lower drawer left
- (33) Others
- 1-5-5 Mechanical problems
- 1-6 Assembly and disassembly
- 1-6-1 Precautions for assembly and disassembly
- 1-6-2 Paper feed section
- (1) Detaching and refitting the upper and lower paper feed pulleys
- (2) Detaching and refitting the bypass paper feed pulley
- (3) Detaching and refitting the left registration cleaner assembly
- (4) Detaching and refitting the right registration cleaner assembly
- (5) Detaching and refitting the bypass paper width switch
- (6) Adjustment after roller and clutch replacement
- 1-6-3 Optical section
- (1) Detaching and refitting the exposure lamp
- (2) Detaching and refitting the scanner wires
- (3) Detaching and refitting the laser scanner unit
- (4) Adjusting the skew and vertical shifting of the laser scanner unit
- (5) Detaching and refitting the ISU (reference)
- (6) Adjusting the position of the ISU (reference)
- (7) Adjusting the longitudinal squareness (reference)
- (8) Adjusting magnification of the scanner in the main scanning direction
- (9) Adjusting magnification of the scanner in the auxiliary scanning direction
- (10) Adjusting the scanner leading edge registration
- (11)Adjusting the scanner center line
- (12) Adjusting the margins for scanning an original on the contact glass
- 1-6-4 Main charging section
- 1-6-5 Drum section
- 1-6-6 Developing section
- 1-6-7 Transfer section
- 1-6-8 Cleaning section
- 1-6-9 Fixing section
- 1-7 Requirements on PCB Replacement
- 2-1 Electrical Parts Layout
- 2-2 Electrical parts layout
- 2-3 Operation of the PCBs
- 2-4 Appendixes
2AV/X
1-5-13
Code Contents
Remarks
Causes Check procedures/corrective measures
1-5
C100
C104
C200
C310
C400
Exposure lamp problem
• Check the CCD input value for the
lighting status of the exposure lamp
100 ms after the exposure lamp is lit
and the carriage is moved to the
shading position. If the exposure lamp
does not light, turn off the lamp. After
500 ms, light the lamp again and, a
further 500 ms later, check the CCD
input.
The exposure lamp does not light
after 5 retries.
Optical system problem
• After AGC, correct input is not
obtained at CCD.
Drive motor problem
• LOCK ALM signal remains high for 1
s, 1 s after the drive motor has turned
on.
Scanner carriage problem
• The home position is not correct
when the power is turned on or at the
start of copying using the contact
glass.
Polygon motor synchronization
problem
• The polygon motor does not reach a
stable speed within 19 s of the polygon
motor remote signal turning on.
Poor contact of
the connector
terminals.
Defective
exposure lamp.
Defective main
PCB.
Incorrect shading
position.
CCD PCB output
problem.
Poor contact of
the connector
terminals.
CCD PCB output
problem.
Defective main
PCB.
Poor contact of
the drive motor
connector
terminals.
Defective drive
motor rotation
control circuit.
Defective drive
transmission
system.
Poor contact of
the connector
terminals.
Defective scanner
home position
switch.
Defective main
PCB.
Defective scanner
motor.
Poor contact of
the polygon motor
connector
terminals.
Check the connection of connectors CN24,
CN23, CN22 and CN3 on the main PCB,
and the continuity across the connector
terminals. Repair or replace if necessary.
Replace the exposure lamp or inverter
PCB.
Replace the main PCB and check for
correct operation.
Adjust the position of the contact glass
(shading plate). If the problem still occurs,
replace the scanner home position switch.
Replace the ISU.
Check the connection of connectors CN23,
CN22 and CN3 on the main PCB, and the
continuity across the connector terminals.
Repair or replace if necessary.
Replace the ISU.
Replace the main PCB and check for
correct operation.
Reinsert the connector. Also check for
continuity within the connector cable. If
none, repair or replace the cable.
Replace the drive motor.
Check if the rollers and gears rotate
smoothly. If not, grease the bushings and
gears. Check for broken gears and replace
if any.
Check the connection of connectors CN28
and CN25 on the main PCB and the
continuity across the connector terminals.
Remedy or replace if necessary.
Replace the scanner home position switch.
Replace the main PCB and check for
correct operation.
Replace the scanner motor.
Reinsert the connector. Also check for
continuity within the connector cable. If
none, repair or replace the cable.