Description: The printed image is light, with no ghosting.
Causes: 1. Engine board 2. Main body. 1. Engine board bias (290V - 310V) and supply voltage (490V - 510V) may be low. (Perform DCU diagnostic mode 04 to measure the voltage) 2. Strong ambient light at the manual feeder entrance.
Remedy: 1. Check the following parts : U201(KA324), Q204(D526-Y), T204(Transformer), U203(SN7407N) Resistors, Diodes and etc. in the output and feedback section 2-1. Check if contrast mode is set to ‘Light’. 2-2. Relocate printer or attach OPC cover sheet, part number JC72-49093A. Remark Bias and supply voltage check point: U203; #9 pulse input, #8 pulse output
Code: 1-060
Description: The printed image is dark.
Causes: Engine board. No Charge voltage in the Engine board. (Perform DCU diagnostic mode 01 to measure the voltage)
Remedy: Check the following parts : U201(KA324), Q211(C1008), Q201(D526-Y), T202(Transformer), U203(SN7407N), Resistors, Diodes and etc. in the output and feedback region. Clean the high voltage terminal on the Engine and its PBA. Refer to the following information. U201(KA324)'s pin #12, #13 ; 2.5-2.9 V, pin #14 ; 5.5-8.5 V For standby, pin #13 ; 2.7V, pin #12 & #14 ; 0V Q201's operaing voltage ; base=+2-2.5 V, emitter=0-1 V collector=30-60 V U203(7407N)'s pin #1 ; 0V input, pin #2 ; 0V output Remark R201 - R209 temperature instability, changed to metal film type after Feb. 1997, PCB ver. 5.0.
Code: 1-061
Description: Entire black page is printed.
Causes: Engine board. 1. No supply or bias voltage at the Engine board. (Perform DCU diagnostic mode 04 to measure the voltage)
Remedy: Check the following parts : U201(KA324), Q204(D526-Y), T204(Transformer), U203(SN7407N) Resistors, Diodes and etc. in the output and feedback section Refer to the following information. U203(7407N)'s pin #9 ; pulse input, pin #8 ; pulse output
Remedy: 2-1. Check the following parts : U201(KA324), Q204(D526-Y), T204(Transformer), U203(SN7407N) Resistors, Diodes and etc. in the output and feedback section Refer to the following information. U203(7407N)'s pin #9 ; pulse input, pin #8 ; pulse output 2-2. Check developer contacts for contamination by toner particles.
Code: 1-063
Description: When printing, especially in high temperature, the printer sounds abnormal and the printed image is dark
Causes: Engine board. Transfer voltage is maximum.
Remedy: Check the following parts : U201(KA324), Q205(A708), Q206(C1008), Q202(KSD526-Y), Q203(KSD526-Y)), VR201, T201 and T203, U203(SN7407) Resistors and Diodes and etc. in the output and feedback section Remark Transfer voltage check point: Q203 operating voltage; Base 2-2.5V, Emitter 0-1V, Collector 30-60V U203; #11 pulse input, #10 pulse output
Code: 1-070
Description: Print density uneven from left to right
Causes: 1. Transfer roller pressure 2. Developer cartridge. The pressure of the left and right springs of the Transfer roller may be unbalanced, the springs are damaged, the Transfer roller is improperly installed, or the transfer roller bushing or holder is damaged.
Remedy: 1. Cause 1 : Replace defective roller or springs. 2. Cause 2 : Check transfer voltage or replace the Transfer roller.