Kyocera TASKalfa 620 Service Manual page 182

2KN/2KP
Code
C4000 Polygon motor synchronization prob-
lem
• The revolution does not reach the sta-
ble speed within 20 s of the START
signal.
C4010 Polygon motor steady-state problem
• The polygon motor rotation is not sta-
ble for 5 s after the polygon motor rota-
tion has been stabilized.
C4100 BD initialization (A) problem
• When power is turned on, only laser A
is output and ASIC of main PWB
detects a BD error for 2000 ms.
C4110 BD initialization (B) problem
• When power is turned on, only laser B
is output and ASIC of main PWB
detects a BD error for 2000 ms.
C4120 BD initialization (C) problem
• When power is turned on, only laser C
is output and ASIC of main PWB
detects a BD error for 2000 ms.
C4200 BD steady-state problem
• ASIC of the main PWB detects a BD
error A for 4000 ms after the polygon
motor rotation has been stabilized.
1-4-38
Contents
Causes Check procedures/corrective measures
Poor contact in the Reinsert the connector. Also check for conti-
polygon motor con- nuity within the connector cable. If none,
nector terminals. remedy or replace the cable.
Defective polygon Replace the laser scanner unit (see page 1-
motor. 5-36).
Defective engine Check if 24 V DC is supplied to YC17-1 on
PWB. the engine PWB. If not, replace the engine
PWB.
Poor contact in the Reinsert the connector. Also check for conti-
polygon motor con- nuity within the connector cable. If none,
nector terminals. remedy or replace the cable.
Defective polygon Replace the laser scanner unit (see page 1-
motor. 5-36).
Defective engine Check if 24 V DC is supplied to YC17-1 on
PWB. the engine PWB. If not, replace the engine
PWB.
Defective laser Replace the laser scanner unit (see page 1-
scanner unit. 5-36).
Defective main Replace the main PWB and check for cor-
PWB. rect operation.
Poor contact in Check the connection of connector YC8 on
connector termi- the main PWB. Repair or replace if neces-
nals. sary.
Defective laser Replace the laser scanner unit (see page 1-
scanner unit. 5-36).
Defective main Replace the main PWB and check for cor-
PWB. rect operation.
Poor contact in Check the connection of connector YC8 on
connector termi- the main PWB and the continuity across the
nals. connector terminals. Repair or replace if
necessary.
Defective laser Replace the laser scanner unit (see page 1-
scanner unit. 5-36).
Defective main Replace the main PWB and check for cor-
PWB. rect operation.
Poor contact in Check the connection of connector YC8 on
connector termi- the main PWB and the continuity across the
nals. connector terminals. Repair or replace if
necessary.
Defective laser Replace the laser scanner unit (see page 1-
diode. 5-36).
Defective polygon Replace the laser scanner unit (see page 1-
motor. 5-36).
Defective main Replace the main PWB and check for cor-
PWB. rect operation.
Poor contact in Check the connection of connector YC8 on
connector termi- the main PWB and the continuity across the
nals. connector terminals. Repair or replace if
necessary.
Remarks