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DETAILED SECTION DESCRIPTIONS
PRINTING
2. Block Diagram
LDDR
Laser
Diode
Controller
Laser
Hexagonal
Diode
Mirror
Motor
Optical Fibre
The LPC on the MFCE board monitors and controls the laser diode timing
(MFDU CN26-2) and transfers data for printing to the laser diode (MFDU
CN26-4).
Cross reference
Group 3 Facsimile Manual: page 4-3-13
3. Error Conditions *
LD Failure:
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 Failure:
The machine detects a mirror motor error when MFDU CN15-4 does not go
low within 10 seconds of the hexagonal mirror motor being turned on.
The machine also detects a mirror motor error when MFDU CN15-4 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 indicator (error code 9-23).
LD Enable
1-2
DATA
1-4
Control
1-6
Mirror Motor Lock
15-4
Mirror Motor Enable
PD1
Serial Interface
Bus Interface
MFDU
26-6
26-4
26-2
EXIO-2
(IC4)
EXIO-1
15-3
(IC3)
Laser
Synch.
Detector
2-18
December 21st, 1995
SCP
(CPU)
1-39
1-40
1-41
LPC
1-42
MFCE
H515D511.wmf
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