Description: Image Transfer/Paper Separator Coronas Faulty charging, corona wire snapping/shorting
The SCD Malfunction signal is detected for 1 sec. or more when the Image Transfer/Paper Separator Coronas output is turned ON.
Remedy: Check 1. Is power being supplied from PWB-A to HV2? • Once the Power Switch has been turned ON, there should be DC24V developing across pins 3 and 2 (GND) of PJ4A. Check 2. Is the Image Transfer/Paper Separator Coronas ON signal being output from PWB-A to HV2? • When the Image Transfer Corona output is ON, there should be DC0V developing across pins 4 and 2 (GND) of PJ4A on PWB-A. (When the output is OFF, there should be a voltage of approx. DC10V.) • When the Paper Separator Corona output is ON, there should be DC0V developing across pins 5 and 2 (GND) of PJ4A on PWB-A. (When the output is OFF, there should be a voltage of approx. DC12V.) Check 3. Is the Image Transfer/Paper Separator Coronas SCD signal being output from HV2 to PWB-A? • When charge leak occurs, there should be DC0V across pins 6 and 2 (GND) of PJ4A on PWB-A. (The voltage should be DC5V under normal conditions.)
Code: C0240
Description: Developing Bias Faulty bias, bias discharging/shorting
The SCD Malfunction signal is detected for 1 sec. or more when the Developing Bias output is turned ON.
Remedy: Check 1. Is power being supplied from PWB-A to HV1? • Once the Power Switch has been turned ON, there should be DC24V developing across pins 1 and 2 (GND) of PJ5A. Check 2. Is the Developing Bias ON signal being output from PWB-A to HV1? • When the developing bias output is ON, there should be DC0V developing across pins 8 and 2 (GND) of PJ5A on PWB-A. (When the output is OFF, there should be a voltage of approx. DC24V.) Check 3. Is the developing bias SCD signal being output from HV1 to PWB-A? • When bias leak occurs, there should be DC0V across pins 13 and 2 (GND) of PJ5A on PWB-A. (The voltage should be DC5V under normal conditions.)
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.