Canon PC770 Service Manual - Page 169

General, Timing, Chart

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(A4, 2 copies, DIRECT, from cassette) Power switch ON Copy Start key ON Sequence STBY INTR A. GENERAL TIMING CHART SCFW SCRV SCFW SCRV LSTR STBY COPYRIGHT t994 CANON INC. 1 Main motor (M1), Side blank lamp (front, rear) 2 Scanner motor (M2) Scanner home position sensor (PS1) 1 Lens home position sensor (PS2) 5 Lens drive solenoid (SL3) 6 Pick-up clutch solenoid (SL1) Registration clutch solenoid (SL2) 8 Pre-registration roller paper sensor (Q751) 9 Scanning lamp (FL1) 10 Transfer cleaning bias 11 Transfer reference bias (ATVC) 12 Transfer bias 13 Primary AC bias 14 Primary DC bias 15 Developing AC bias 16 Developing DC bias 17 Static eliminator bias 18 Delivery sensor CANON PC720174017501770RDA AUG.1994 PRINTED IN JAPAN (MPRIME AU JAPON) ME Pre-heatin -400V -625V -400V -625V -400V -500V -80 to 580V -500V -80 to 580V -500V : Scanning motor (reverse) A - 1

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A.
GENERAL
TIMING
CHART
(A4,
2
copies,
DIRECT,
from
cassette)
Power
switch
ON
Copy
Start
key
ON
Sequence
STBY
INTR
SCFW
SCRV
SCFW
SCRV
LSTR
STBY
1
Main
motor
(M1),
Side
blank
lamp
(front,
rear)
2
Scanner
motor
(M2)
Scanner
home
position
sensor
(PS1)
1
ME
Lens
home
position
sensor
(PS2)
5
Lens
drive
solenoid
(SL3)
6
Pick-up
clutch
solenoid
(SL1)
Registration
clutch
solenoid
(SL2)
8
Pre
-registration
roller
paper
sensor
(Q751)
Pre-heatin
9
Scanning
lamp
(FL1)
10
Transfer
cleaning
bias
11
Transfer
reference
bias
(ATVC)
12
Transfer
bias
-400V
-625V
-400V
-625V
-400V
13
Primary
AC
bias
14
Primary
DC
bias
15
Developing
AC
bias
-500V
-80
to
580V
-500V
-80
to
580V
-500V
16
Developing
DC
bias
17
Static
eliminator
bias
18
Delivery
sensor
:
Scanning
motor
(reverse)
COPYRIGHT
t994
CANON
INC.
CANON
PC720174017501770
RDA
AUG.1994
PRINTED
IN
JAPAN
(MPRIME
AU
JAPON)
A
-
1