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A. Locations .......................... 3-24
B. Thermoswitch ................... 3-25
C. Door Switch ...................... 3-25
D. Upper Cassette Paper-size
Sensing Switch/Lower Cassette
Paper-size Sensing Switch . 3-26
E. Thermistor ........................ 3-26
F. Registration Paper Sensor . 3-27
G. Pick-up Unit Paper Sensor. 3-28
H. Pick-up Unit Door Sensor .. 3-28
I. Lower Cassette Sensor/
Upper Cassette Sensor/
Lower Cassette Paper-level
Sensor 1/Lower Cassette
Paper-level Sensor 2/Upper
Cassette Paper-level Sensor 1/
Upper Cassette Paper-level
Sensor 2/Lower Cassette
Paper-out Sensor/Upper
Cassette Paper-out Sensor. 3-29
J. Multi-purpose Tray Paper
Sensor /Lifting Plate
Position Sensor ................. 3-29
K. Face-down Tray Paper Full
Sensor /Face-down Tray
Delivery Sensor /Fixing
Unit Delivery Sensor ......... 3-30
VI. CLUTCHS/SOLENOIDS ........... 3-31
A. Locations .......................... 3-31
B. Multi-purpose Tray Pick-up
Clutch ............................... 3-32
C. Feed Clutch....................... 3-32
D. Registration Clutch ........... 3-33
E. Lifting Plate Solenoid ........ 3-33
F. Cassette Pick-up Solenoid . 3-34
G. Face-up Solenoid Unit ....... 3-34
VII. MOTORS/FANS ...................... 3-35
A. Locations .......................... 3-35
B. Main Motor........................ 3-36
C. Pick-up Motor.................... 3-36
D. Fans ................................. 3-37
VIII.PCBS...................................... 3-41
A. Locations .......................... 3-41
B. Video Controller PCB Unit . 3-42
C. DC Controller PCB ............ 3-43
D. Pick-up PCB ..................... 3-44
E. Multi-purpose Tray PCB ... 3-44
F. Switch/Sensor PCB .......... 3-45
G. High-voltage Power Supply
Unit .................................. 3-47
H. Cassette Paper-size Sensing
PCB .................................. 3-47
I. Power Supply ................... 3-48
I. PREFACE ............................... 4-1
A. Malfunction Diagnosis
Flowchart ......................... 4-1
B. Initial Check ..................... 4-4
C. Test Print.......................... 4-5
II. IMAGE DEFECTS.................... 4-8
III. PAPER JAMS
TROUBLESHOOTING .............. 4-14
IV. PAPER TRANSPORT
TROUBLESHOOTING .............. 4-18
V. MALFUNCTION
TROUBLESHOOTING .............. 4-20
VI. MALFUNCTION STATUS
TROUBLESHOOTING .............. 4-21
VII. MEASUREMENT AND
ADJUSTMENT ........................ 4-28
A. Mechanical Adjustment ..... 4-28
B. Electrical Adjustment........ 4-29
C. Variable Resistors, LEDs,
Test Pins, Jumpers and
Switches on PCBs.............. 4-30
VIII.MAINTENANCE AND
CHAPTER 4 TROUBLESHOOTING