Timing Chart For Loads And Function - Canon LBP-CX Series Service Manual

6. TIMING CHART FOR LOADS AND FUNCTION
~
PURS
INTR
LSTR
Power WAIT STBY
PRINT
STBY
PAUSE JAM MLFUNK
up Wait Standby
Initial
Print
Last
Standby Pause Jam
Malfunc-
t
reset
rotation
rotation
ti on
Drum
0
0
0 0
Preconditioning exposure
lamps
0
0
0 0
Scanner motor
0
0 0
0
Fixing roller heater
0 0
0 0 0
0
High-voltage primary 0
0 0
High-voltage transfer 0
Developing bias (DC) 0
0 0
Developing bias (AC) 0
Cassette pickup roller
0 0
clutch solenoid
Manual pickup roller
0 0
solenoid
Registration shutter
0
solenoid
Laser heater
0 0
0 0 0
0 0
Auto power control
0 0
0
start signal (APCST) (See
V. A. 4. C in this chapter)
1 sec 2 min
5.0 sec 8.6 sec 5.7 sec
(9.0 sec) (9.9 sec)
Table 3-3 Timing chart
Notes: - "0" indicates that the component or function is ON.
- Auxiliary (manual) feed timing is given in parentheses.
B. Interface Signals
- During PAUSE, only the laser heater is ON.
- If a jam or malfunction occurs, all components are turned off.
- The laser driver in the DC controller stabilizes laser beam intensity only when the
scanner motor is rotating at the correct speed.
- The temperature of the upper fixing roller is kept
at
160° C during STBY. During
INTR, PRINT and LSTR, upper fixing roller temperature is kept at 170°C for cassette
feed and 180° C for auxiliary (manual) feed.
The video interface signals used to coordinate
print data from the external device to the DC
controller are shown below.
When the power is switched ON the DC control-
ler transmits the PRINTER POWER READY signal
(PPRDY) and informs the external device that the
printer is ON. The external device sends a TRUE
CONTROLLER POWER READY signal (CPRDY)
to the DC controller when the external device is
switched ON. The DC controller receives an inter-
face signal from the external device only when signal
CPRDY is TRUE. When the printer carries out the
sequence from WAIT to STBY, and is ready for print-
ing, a TRUE READY signal (RDY) is transmitted to
the external device .
PPR DY
....._
CPR DY
ROY
PRNT
G>
VSREQ
N
(J
0
...
·:;;:
VSYNC N
.!!
G>
...,
"E
"O
5
iii
80,BD
...
c
...
c
"
0
~
VDO, VDO
"'
"
c
x
c
0
w
SC
0 0
0
SCLK
SBSY
CBSY
-
Figure 3-11 Handshaking signals
If the external device has prepared data to print
and receives a TRUE RDY signal from the DC
controller, the external device sends a TRUE PRINT
COPYRIGHT
©
BY CAllON INC. CANON LBP-CX SERIES REV.2 JULY 1985 PRINTED IN JAPAN (IMPRIME AU JAPOI!)
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