2. Block Diagram
The LIF block in the FCIP monitors and controls the laser diode power (FDU
CN26-2) and transfers data for printing to the laser diode (FDU CN26-4).
Cross-reference
Group 3 Facsimile Manual: page 4-3-13
3. Error Conditions
LD Failure Detection:
The machine detects LD failure when the Laser Synchronization signal is not
detected 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 Error:
The machine detects a mirror motor error when FDU CN14-4 does not go low
within 10 seconds of the hexagonal mirror motor being turned on.
The machine also detects a mirror motor error when FDU CN14-4 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 in-
dicator (error code 9-23).
FDU
FCE
LDDR
FCIP
Laser
Synch
Detector
Circuit
1-37
1-36
1-40
1-91
1-11
14-4
14-3
EXIO
CPU
LIF
LD Enable
DATA
Control
Laser Synch
Detector
Mirror Motor Lock
Laser
Diode
Laser
Diode
Controller
Hexagonal
Mirror
Drive Unit
Mirror Motor Enable
26-6
26-4
26-2
1-2
1-4
1-6
H521D648.wmf
May 22nd, 1995
DETAILED SECTION DESCRIPTIONS
PRINTING
2-27