• Code: C0400
• Description: Exposure Lamp LA2 Low intensity level, lamp out, lamp terminal/connector left disconnected
  The intensity of the LA2 light is a level equivalent to 17/255 or less as detected by the CCD during the clamp level/dynamic range auto adjustment.
• Remedy: Check 1. Is power (AC100V) being supplied to PU3? • Once the Power Switch has been turned ON, there should be AC100V developing across pins 1 and 5 of PJ3PU3 on PU3. Check 2. Is power (DC24V) being supplied from PU2 to PU3? • Once the Power Switch has been turned ON, there should be DC24V developing across pins 1 and 2 of PJ3PU3 on PU3? Check 3. Is the Exposure Lamp voltage being applied from PU3 to LA2? • When LA2 is ON, there should be DC0V across pins 4 and 3 (GND) of PJ3PU3 on PU3. • When LA2 is ON, an Exposure Lamp voltage of approx. DC60V should be output across pins 1 and 2 of PJ2PU3 on PU3.

• Code: C0500
• Description: Faulty warming-up Defective heater lamp, defective thermistor, heater lamp out
  The required temperature increase steps (4 steps) are not detected during the warm-up cycle.
• Remedy: Check 1. Is power (AC100V) being supplied from RY101 to SSR101? • After the Power Switch has been turned ON and RY102 turned ON, AC100V should be being output across pins 4 and 8 of RY101. Check 2. Is power (DC24V) being supplied from PWB-B to RY101? • Once the Power Switch has been turned ON, there should be DC24V across pin 1 of PJ2B on PWB-B and GND. Check 3. Is an RY101 ON signal being output from PWB-B to RY101? • During the time between when RY101 is turned ON and it is latched ON after the Power Switch has been turned ON, there should be DC24V across pin 2 of PJ2B on PWB-B and GND. (The voltage should be DC0V during other times.) Check 4. Is power (DC5V) being supplied from PWB-B to SSR101? • Once the Power Switch has been turned ON, there should be DC5V across pin 7 of PJ2B on PWB-B and GND. Check 5. Is an SSR101 ON signal being output from PWB-B to SSR101? • During the time between when RY101 is turned ON and it is latched ON after the Power Switch has been turned ON, there should be approx. DC4.5V across pin 8 of PJ2B on PWB-B and GND. The voltage should also be approx. DC4.5V when H1 is turned OFF. (The voltage should be DC0V during other times.) Check 6. Is the thermistor analog voltage being output from TH1 to PWB-A? • The thermistor analog voltage should be detected across pins 2 and 1 (GND) of PJ6A on PWB-A. NOTE: For the relationship between the Fusing Roller surface temperatures and thermistor analog voltages, see the table on the next page. Check 7. Is the Fusing Roller Heater Lamp voltage being applied to H1? • A Fusing Roller Heater Lamp voltage of AC100V should be detected across pins 1 and 2 of CN4 during the warm-up cycle.

• Code: C0510
• Description: Abnormally low fusing temperature Defective heater lamp, defective thermistor, heater lamp out
  The temperature remains 140°C or less for 1 sec. or more after the warm-up cycle has been completed.
• Remedy: Check 1. Is power (AC100V) being supplied from RY101 to SSR101? • After the Power Switch has been turned ON and RY102 turned ON, AC100V should be being output across pins 4 and 8 of RY101. Check 2. Is power (DC24V) being supplied from PWB-B to RY101? • Once the Power Switch has been turned ON, there should be DC24V across pin 1 of PJ2B on PWB-B and GND. Check 3. Is an RY101 ON signal being output from PWB-B to RY101? • During the time between when RY101 is turned ON and it is latched ON after the Power Switch has been turned ON, there should be DC24V across pin 2 of PJ2B on PWB-B and GND. (The voltage should be DC0V during other times.) Check 4. Is power (DC5V) being supplied from PWB-B to SSR101? • Once the Power Switch has been turned ON, there should be DC5V across pin 7 of PJ2B on PWB-B and GND. Check 5. Is an SSR101 ON signal being output from PWB-B to SSR101? • During the time between when RY101 is turned ON and it is latched ON after the Power Switch has been turned ON, there should be approx. DC4.5V across pin 8 of PJ2B on PWB-B and GND. The voltage should also be approx. DC4.5V when H1 is turned OFF. (The voltage should be DC0V during other times.) Check 6. Is the thermistor analog voltage being output from TH1 to PWB-A? • The thermistor analog voltage should be detected across pins 2 and 1 (GND) of PJ6A on PWB-A. NOTE: For the relationship between the Fusing Roller surface temperatures and thermistor analog voltages, see the table on the next page. Check 7. Is the Fusing Roller Heater Lamp voltage being applied to H1? • A Fusing Roller Heater Lamp voltage of AC100V should be detected across pins 1 and 2 of CN4 during the warm-up cycle.

• Code: C0520
• Description: Abnormally high fusing temperature Defective heater lamp, defective thermistor, heater lamp out
  The temperature remains 220°C or more for 1 sec. or more after the warm-up cycle has been completed.
• Remedy: Check 1. Is power (AC100V) being supplied from RY101 to SSR101? • After the Power Switch has been turned ON and RY102 turned ON, AC100V should be being output across pins 4 and 8 of RY101. Check 2. Is power (DC24V) being supplied from PWB-B to RY101? • Once the Power Switch has been turned ON, there should be DC24V across pin 1 of PJ2B on PWB-B and GND. Check 3. Is an RY101 ON signal being output from PWB-B to RY101? • During the time between when RY101 is turned ON and it is latched ON after the Power Switch has been turned ON, there should be DC24V across pin 2 of PJ2B on PWB-B and GND. (The voltage should be DC0V during other times.) Check 4. Is power (DC5V) being supplied from PWB-B to SSR101? • Once the Power Switch has been turned ON, there should be DC5V across pin 7 of PJ2B on PWB-B and GND. Check 5. Is an SSR101 ON signal being output from PWB-B to SSR101? • During the time between when RY101 is turned ON and it is latched ON after the Power Switch has been turned ON, there should be approx. DC4.5V across pin 8 of PJ2B on PWB-B and GND. The voltage should also be approx. DC4.5V when H1 is turned OFF. (The voltage should be DC0V during other times.) Check 6. Is the thermistor analog voltage being output from TH1 to PWB-A? • The thermistor analog voltage should be detected across pins 2 and 1 (GND) of PJ6A on PWB-A. NOTE: For the relationship between the Fusing Roller surface temperatures and thermistor analog voltages, see the table on the next page. Check 7. Is the Fusing Roller Heater Lamp voltage being applied to H1? • A Fusing Roller Heater Lamp voltage of AC100V should be detected across pins 1 and 2 of CN4 during the warm-up cycle.

• Code: C0600
• Description: Scanner Drive Motor Motor’s failure to turn, defective motor, defective PWB-IE
  The motor encoder pulses (3 pulses) are not detected within 60 msec. after the motor has been energized.
• Remedy: Check 1. Is power (DC24V/DC5V) being supplied to PWB-IE? • Once the Power Switch has been turned ON, there should be the following voltages across the respective pins of PJ2IE on PWB-IE: DC24V across pins 1 and 3 (GND) DC24V across pins 2 and 4 (GND) DC5V across pins 5 and 6 (GND) Check 2. Does PC6 detect the Scanner properly? • When the Scanner reaches PC6, it blocks PC6 (LOW) and DC0V should be developing across pins 12 and 11 (GND) of PJ3ID on PWB-ID. [The voltage becomes DC5V when PC6 is unblocked (HIGH).]

• Code: C0601
• Description: Scanner Drive Motor Defective driver
  No motor encoder pulses are output for 40 msec. after the motor has been energized.
• Remedy: Check 1. Is power (DC24V/DC5V) being supplied to PWB-IE? • Once the Power Switch has been turned ON, there should be the following voltages across the respective pins of PJ2IE on PWB-IE: DC24V across pins 1 and 3 (GND) DC24V across pins 2 and 4 (GND) DC5V across pins 5 and 6 (GND) Check 2. Does PC6 detect the Scanner properly? • When the Scanner reaches PC6, it blocks PC6 (LOW) and DC0V should be developing across pins 12 and 11 (GND) of PJ3ID on PWB-ID. [The voltage becomes DC5V when PC6 is unblocked (HIGH).]

• Code: C0650
• Description: Scanner Drive Motor Faulty Scanner home position detection
  The Scanner does not return to its home position.
• Remedy: Check 1. Is power (DC24V/DC5V) being supplied to PWB-IE? • Once the Power Switch has been turned ON, there should be the following voltages across the respective pins of PJ2IE on PWB-IE: DC24V across pins 1 and 3 (GND) DC24V across pins 2 and 4 (GND) DC5V across pins 5 and 6 (GND) Check 2. Does PC6 detect the Scanner properly? • When the Scanner reaches PC6, it blocks PC6 (LOW) and DC0V should be developing across pins 12 and 11 (GND) of PJ3ID on PWB-ID. [The voltage becomes DC5V when PC6 is unblocked (HIGH).]

• Code: C0900
• Description: 3rd Drawer Lift-Up Motor M107 Lifting failure, defective motor, overload, connector left disconnected
  The paper lifting motion is not completed within 6 sec. after the motor has been energized.
• Remedy: Check 1. Is an M105-M108 Remote signal being output from PWB-B to M105-M108? • When M105-M108 is energized, the voltage across the following pins of PJ14B on PWB-B should be as follows: DC10V across pins 1 and 5 (GND) (M105 energized) DC10V across pins 2 and 6 (GND) (M106 energized) DC10V across pins 3 and 7 (GND) (M107 energized) DC10V across pins 4 and 8 (GND) (M108 energized) Check 2. Is power (DC5V) being supplied from PWB-B to PC109-PC112? • Once the Power Switch has been turned ON, the voltage across the following pins should be as follows: DC5V across pins 10 and 4 (GND) of PJ9B (PC109) DC5V across pins 8 and 4 (GND) of PJ10B (PC110) DC5V across pins 8 and 4 (GND) of PJ12B (PC111) DC5V across pins 8 and 4 (GND) of PJ15B (PC112) Check 3. Is a PC109-PC112 signal being output from PWB-B to PC109-PC112? • During the paper lifting motion, the voltage across the following pins on PWB-B should be as follows: DC5V across pins 3 and 4 (GND) of PJ9B (PC109) DC5V across pins 3 and 4 (GND) of PJ10B (PC110) DC5V across pins 3 and 4 (GND) of PJ12B (PC111) DC5V across pins 3 and 4 (GND) of PJ15B (PC112) (The voltage becomes DC0V after the completion of the paper lifting motion.)