Sharp 27DV-S100 Service Manual page 50

MECHANISM OPERATION FLOWCHART
* This flowchart describes the outline of the mechanism's operation, but does not give its details.
G mechanical timing
Cam graph E
Mode check
25
Cam mark
20
Mode detection outside
(D709 SW B)
15
Mode detection inside
(D708 SW A)
10
5
0
60 120
CA/END
CS/EJ
UL
0 19.812 81
10.354 12.812
EJ UL
Mode detection outside 0 0 0 0 0 1 1 1
Mode detection inside 1 1 0 0 0 0 1 1
S sensor 1 1 0 1 1 or 0
Open
S sensor
Close
Mode detection inside
sensor A
CS/EJ
1
ULD 1
PU1 1
PU2 0
VSR 0
PB 0
SLOW 0
FF 0
STOP
0
180 240 300
PU1 PU2 VSR PB SLOW FF STOP
179 200 233 265 282 316 334
PU PU2 VSR PB SLW FF STP
1 1 1 1 0 1 1 0 1 0 0 1 1 0 1 1 0
0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Mode detection outside
sensor B
0
1
1
1
1
0
1
1
0
CASSETTE INSERTION
Insert cassette.
Double action rack slides.
Loading motor starts in normal
direction and master cam counter
clockwise.
Cassette
inserting
Does mechanism position sw.
380
come off within 2.5 sec.?
YES
Are start/end sensors at low level
before cassette insertion ?
YES
Drum motor starts.
Tape loading.
Pinch roller comes into contact.
Full-
Cam switch is at PB position.
loading
Loading motor stop.
Is drum FG pulse outputted ?
YES
End
STOP
End
Cassette is ejected and loading
motor stops.
Start sensor close.
Loading motor turns in reverse
direction and master cam
counterclockwise.
NO
(Cassette is judged
caught halfway.)
NO
(Cassette LED or some other part
is judged defective.)
NO
Unloading