2. Block Diagram
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).
MFDU
MFCE
Laser
Synch.
Detector
1-42
15-4
15-3
EXIO-1
(IC3)
Optical Fibre
LD Enable
DATA
Control
Laser
Diode
Hexagonal
Mirror
Motor
Mirror Motor Lock
Mirror Motor Enable
26-6
26-4
26-2
EXIO-2
(IC4)
PD1
1-39
1-40
1-41
LPC
SCP
(CPU)
LDDR
Laser
Diode
Controller
1-2
1-4
1-6
Serial Interface
Bus Interface
H515D511.wmf
DETAILED SECTION DESCRIPTIONS
December 21st, 1995
PRINTING
2-18
