Ricoh FAX2900L Service Manual page 36

21 May, 1999
Block Diagram
LDDR
Laser
Synch
Detector
Circuit
Laser
Diode
Controller
Polygon
Laser
Mirror
Diode
Drive Unit
The LIF (Laser Interface) circuit inside the FCIP5 monitors and controls the laser
diode timing (FCU CN9-3), and transfers data for printing to the laser diode (FCU
CN9-6).
Cross Reference
Group 3 Facsimile Manual: page 4-3-13
Error Conditions
LD Failure:
The machine detects LD failure when it does not detect the laser synchronization
signal within 10 ms of the LD ready signal. When this occurs, the machine warns
the customer with the Call Service indicator (error code 9-20).
Mirror Motor Failure:
The machine detects a mirror motor error when the FCU CN10-4 signal does not
go low within 10 seconds of the polygon mirror motor turning on.
The machine also detects a mirror motor error when the FCU CN10-4 signal goes
back to high for 3 seconds or more during mirror motor operation. When either of
these errors occurs, the machine warns the customer with the Call Service
indicator (error code 9-23).
Laser Synch
Detector
9-4
LD Enable
9-2
D A T A
9-6
Control
9-3
Mirror Motor Lock
10-4
Mirror Motor Enable
10-3
2-9
FCU
FCIP05
LIF
EXIO
24V Driver
H547D506.WMF
PRINTING