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June 10th, 1997
2. Block Diagram
Laser Synch Detector
L D D R
Laser
D i o d e
Controller
Laser
Polygon
Diode
Mirror
Drive Unit
The LIF block in the FCIP2 monitors and controls the laser diode power (FCU
CN26-3) and transfers data for printing to the laser diode (FCU CN26-5).
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 FCU 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 FCU 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).
Laser
Synch
Detector
Circuit
LD Enable
1-2
26-7
D A T A
1-4
26-5
Control
1-6
26-3
Mirror Motor Lock
14-4
Mirror Motor Enable
14-3
2-13
DETAILED SECTION DESCRIPTIONS
FCU
FCIP2
LIF
EXIO
PRINTING
H523D506.wmf
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